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  1. Lake Charles CCS Project

    SciTech Connect (OSTI)

    Leib, Thomas; Cole, Dan

    2015-06-30

    In late September 2014 development of the Lake Charles Clean Energy (LCCE) Plant was abandoned resulting in termination of Lake Charles Carbon Capture and Sequestration (CCS) Project which was a subset the LCCE Plant. As a result, the project was only funded through Phase 2A (Design) and did not enter Phase 2B (Construction) or Phase 2C (Operations). This report was prepared relying on information prepared and provided by engineering companies which were engaged by Leucadia Energy, LLC to prepare or review Front End Engineering and Design (FEED) for the Lake Charles Clean Energy Project, which includes the Carbon Capture and Sequestration (CCS) Project in Lake Charles, Louisiana. The Lake Charles Carbon Capture and Sequestration (CCS) Project was to be a large-scale industrial CCS project intended to demonstrate advanced technologies that capture and sequester carbon dioxide (CO2) emissions from industrial sources into underground formations. The Scope of work was divided into two discrete sections; 1) Capture and Compression prepared by the Recipient Leucadia Energy, LLC, and 2) Transport and Sequestration prepared by sub-Recipient Denbury Onshore, LLC. Capture and Compression-The Lake Charles CCS Project Final Technical Report describes the systems and equipment that would be necessary to capture CO2 generated in a large industrial gasification process and sequester the CO2 into underground formations. The purpose of each system is defined along with a description of its equipment and operation. Criteria for selection of major equipment are provided and ancillary utilities necessary for safe and reliable operation in compliance with environmental regulations are described. Construction considerations are described including a general arrangement of the CCS process units within the overall gasification project. A cost estimate is provided, delineated by system area with cost breakdown showing equipment, piping and materials, construction labor, engineering, and other costs. The CCS Project Final Technical Report is based on a Front End Engineering and Design (FEED) study prepared by SK E&C, completed in [June] 2014. Subsequently, Fluor Enterprises completed a FEED validation study in mid-September 2014. The design analyses indicated that the FEED package was sufficient and as expected. However, Fluor considered the construction risk based on a stick-build approach to be unacceptable, but construction risk would be substantially mitigated through utilization of modular construction where site labor and schedule uncertainty is minimized. Fluor’s estimate of the overall EPC project cost utilizing the revised construction plan was comparable to SKE&C’s value after reflecting Fluor’s assessment of project scope and risk characteristic. Development was halted upon conclusion of Phase 2A FEED and the project was not constructed.Transport and Sequestration – The overall objective of the pipeline project was to construct a pipeline to transport captured CO2 from the Lake Charles Clean Energy project to the existing Denbury Green Line and then to the Hastings Field in Southeast Texas to demonstrate effective geologic sequestration of captured CO2 through commercial EOR operations. The overall objective of the MVA portion of the project was to demonstrate effective geologic sequestration of captured CO2 through commercial Enhanced Oil Recovery (EOR) operations in order to evaluate costs, operational processes and technical performance. The DOE target for the project was to capture and implement a research MVA program to demonstrate the sequestration through EOR of approximately one million tons of CO2 per year as an integral component of commercial operations.

  2. The Lake Charles CCS Project

    SciTech Connect (OSTI)

    Doug Cathro

    2010-06-30

    The Lake Charles CCS Project is a large-scale industrial carbon capture and sequestration (CCS) project which will demonstrate advanced technologies that capture and sequester carbon dioxide (CO{sub 2}) emissions from industrial sources into underground formations. Specifically the Lake Charles CCS Project will accelerate commercialization of large-scale CO{sub 2} storage from industrial sources by leveraging synergy between a proposed petroleum coke to chemicals plant (the LCC Gasification Project) and the largest integrated anthropogenic CO{sub 2} capture, transport, and monitored sequestration program in the U.S. Gulf Coast Region. The Lake Charles CCS Project will promote the expansion of EOR in Texas and Louisiana and supply greater energy security by expanding domestic energy supplies. The capture, compression, pipeline, injection, and monitoring infrastructure will continue to sequester CO{sub 2} for many years after the completion of the term of the DOE agreement. The objectives of this project are expected to be fulfilled by working through two distinct phases. The overall objective of Phase 1 was to develop a fully definitive project basis for a competitive Renewal Application process to proceed into Phase 2 - Design, Construction and Operations. Phase 1 includes the studies attached hereto that will establish: the engineering design basis for the capture, compression and transportation of CO{sub 2} from the LCC Gasification Project, and the criteria and specifications for a monitoring, verification and accounting (MVA) plan at the Hastings oil field in Texas. The overall objective of Phase 2, provided a successful competitive down-selection, is to execute design, construction and operations of three capital projects: (1) the CO{sub 2} capture and compression equipment, (2) a Connector Pipeline from the LLC Gasification Project to the Green Pipeline owned by Denbury and an affiliate of Denbury, and (3) a comprehensive MVA system at the Hastings oil field.

  3. Lake Charles Liquefaction Project Final Environmental Impact Statement

    Energy Savers [EERE]

    Lake Charles Liquefaction Project Final Environmental Impact Statement Trunkline Gas Company, LLC, Lake Charles LNG Company, LLC, and Lake Charles LNG Export Company, LLC FERC Docket Nos. CP14-119-000, CP14-120-000, and CP14-122-000 DOE Docket Nos. 11-59-LNG and 13-04-LNG FERC/EIS-0258F, DOE/EIS-0491 Cooperating Agencies: U.S. Coast Guard U.S. Department of Energy U.S. Department of Transportation Lake Charles Liquefaction Project Final Environmental Impact Statement FERC/EIS-0258F Docket Nos.

  4. EIS-0498: Magnolia LNG and Lake Charles Expansion Projects; Calcasieu...

    Energy Savers [EERE]

    with the public interest. EIS-0498: Magnolia LNG and Lake Charles Expansion Projects Public Comment Opportunities No public comment opportunities available at this time....

  5. SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO...

    Energy Savers [EERE]

    LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 PDF icon October 2013 PDF icon ...

  6. SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    LAKE CHARLES LNG EXPORT COMPANY, LLC (formerly Trunkline LNG Export, LLC) - DK. NO. 13-04-LNG - ORDER 3252 SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC (formerly ...

  7. QER- Comment of Lake Charles Harbor & Terminal District

    Broader source: Energy.gov [DOE]

    Good Afternoon, Please find the Lake Charles Harbor and Terminal District’s comments on Infrastructure Constraints in re: the QER Investigation hearing scheduled for Bismarck, ND on August 8, 2014. Please include these comments in the public record of the hearing. Thank you.

  8. Lake Charles Carbon Capture and Sequestration Project U. S. Department of Energy

    Energy Savers [EERE]

    Lake Charles Carbon Capture and Sequestration Project U. S. Department of Energy National Energy Technology Laboratory March 2014 1 INTRODUCTION The United States (U.S.) Department of Energy (DOE) issued a final environmental impact statement (EIS; DOE/EIS-0464) for the Lake Charles Carbon Capture and Sequestration Project (Lake Charles CCS Project) in November 2013. DOE announced its decision to provide up to $261.4 million in cost-shared funding to Leucadia Energy, LLC (Leucadia) for the

  9. Lake Charles Carbon Capture and Sequestration Project U. S. Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lake Charles Carbon Capture and Sequestration Project U. S. Department of Energy National Energy Technology Laboratory March 2014 1 INTRODUCTION The United States (U.S.) Department of Energy (DOE) issued a final environmental impact statement (EIS; DOE/EIS-0464) for the Lake Charles Carbon Capture and Sequestration Project (Lake Charles CCS Project) in November 2013. DOE announced its decision to provide up to $261.4 million in cost-shared funding to Leucadia Energy, LLC (Leucadia) for the

  10. SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG -

    Energy Savers [EERE]

    ORDER 3324 | Department of Energy LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 PDF icon October 2013 PDF icon April 2014 PDF icon October 2014 PDF icon April 2015 PDF icon October 2015 PDF icon April 2016 More Documents & Publications SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC (formerly Trunkline LNG Export, LLC) - DK. NO. 13-04-LNG - ORDER 3252 FE DOCKET NO.

  11. Price of Lake Charles, LA Natural Gas LNG Imports from Australia...

    U.S. Energy Information Administration (EIA) Indexed Site

    Australia (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Australia (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 ...

  12. SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO...

    Energy Savers [EERE]

    More Documents & Publications SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC (formerly Trunkline LNG Export, LLC) - DK. NO. 13-04-LNG - ORDER 3252 FE DOCKET NO. ...

  13. SEMI-ANNUAL REPORTS FOR LAKE CHARLES LNG EXPORT COMPANY, LLC...

    Broader source: Energy.gov (indexed) [DOE]

    & Publications SEMI-ANNUAL REPORTS FOR LAKE CHARLES EXPORTS, LLC - FE DKT. NO. 11-59-LNG - ORDER 3324 EIS-0491: Draft Environmental Impact Statement FE DOCKET NO. 11-59-LNG...

  14. Lake Charles, LA Natural Gas LNG Imports from Equatorial Guinea (Dollars

    U.S. Energy Information Administration (EIA) Indexed Site

    per Thousand Cubic Feet) Lake Charles, LA Natural Gas LNG Imports from Equatorial Guinea (Dollars per Thousand Cubic Feet) Lake Charles, LA Natural Gas LNG Imports from Equatorial Guinea (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's -- 6.75 -- -- 2010's -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date:

  15. Lake Charles, LA Natural Gas Liquefied Natural Gas Imports from Trinidad

    U.S. Energy Information Administration (EIA) Indexed Site

    and Tobago (Million Cubic Feet) Lake Charles, LA Natural Gas Liquefied Natural Gas Imports from Trinidad and Tobago (Million Cubic Feet) Lake Charles, LA Natural Gas Liquefied Natural Gas Imports from Trinidad and Tobago (Million Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2011 2,282 2012 2,514 - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016

  16. EIS-0498: Magnolia LNG and Lake Charles Expansion Projects; Calcasieu Parish, Louisiana

    Broader source: Energy.gov [DOE]

    The Federal Energy Regulatory Commission prepared an EIS that analyzes the potential environmental impacts of constructing and operating the proposed Magnolia LNG Project, an on-land liquefied natural gas (LNG) terminal and associated facilities near Lake Charles, Louisiana. The EIS also analyzes the potential environmental impacts of constructing and operating the proposed Lake Charles Expansion Project, which would reconfigure an existing pipeline system to serve the LNG terminal site. DOE was a cooperating agency in preparing the EIS. DOE, Office of Fossil Energy, has an obligation under Section 3 of the Natural Gas Act to authorize the import and export of natural gas, including LNG, unless it finds that the import or export is not consistent with the public interest.

  17. Price of Lake Charles, LA Liquefied Natural Gas Total Imports (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Liquefied Natural Gas Total Imports (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Liquefied Natural Gas Total Imports (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 5.00 5.61 9.05 6.64 6.88 7.63 3.32 2010's 4.05 4.18 2.10 -- -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release

  18. Price of Lake Charles, LA Natural Gas LNG Imports from Algeria (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Algeria (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Algeria (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 2.21 2000's 3.49 3.37 3.60 5.34 5.63 9.13 -- 7.03 -- -- 2010's -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring

  19. Price of Lake Charles, LA Natural Gas LNG Imports from Brunei (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Brunei (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Brunei (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's NA 2000's NA NA 3.25 -- -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring Pages: U.S. Price of Liquefied Natural

  20. Price of Lake Charles, LA Natural Gas LNG Imports from Egypt (Nominal

    U.S. Energy Information Administration (EIA) Indexed Site

    Dollars per Thousand Cubic Feet) Egypt (Nominal Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Egypt (Nominal Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's -- 9.73 6.60 6.64 7.14 3.29 2010's 3.93 -- -- -- -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016

  1. Price of Lake Charles, LA Natural Gas LNG Imports from Indonesia (Dollars

    U.S. Energy Information Administration (EIA) Indexed Site

    per Thousand Cubic Feet) Indonesia (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Indonesia (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's NA 2000's 3.99 NA NA - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring Pages: U.S. Price of Liquefied

  2. Price of Lake Charles, LA Natural Gas LNG Imports from Malaysia (Dollars

    U.S. Energy Information Administration (EIA) Indexed Site

    per Thousand Cubic Feet) Malaysia (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Malaysia (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 2.36 2000's NA NA 3.43 4.97 4.93 10.00 -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring Pages: U.S. Price

  3. Price of Lake Charles, LA Natural Gas LNG Imports from Oman (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Oman (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Oman (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's NA 2000's 3.36 5.56 3.34 3.76 5.59 5.72 -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring Pages: U.S. Price of

  4. Price of Lake Charles, LA Natural Gas LNG Imports from Other Countries

    U.S. Energy Information Administration (EIA) Indexed Site

    (Nominal Dollars per Thousand Cubic Feet) Other Countries (Nominal Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Other Countries (Nominal Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 5.52 -- -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring

  5. Price of Lake Charles, LA Natural Gas LNG Imports from Qatar (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Qatar (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Qatar (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 2.71 2000's 3.44 4.37 3.39 4.99 5.68 5.97 -- 6.19 -- -- 2010's -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring

  6. Price of Lake Charles, LA Natural Gas LNG Imports from United Arab Emirates

    U.S. Energy Information Administration (EIA) Indexed Site

    (Dollars per Thousand Cubic Feet) United Arab Emirates (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from United Arab Emirates (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 3.03 2000's 3.53 NA NA - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date: 5/31/2016 Referring

  7. Price of Lake Charles, LA Natural Gas LNG Imports from Nigeria (Dollars per

    U.S. Energy Information Administration (EIA) Indexed Site

    Thousand Cubic Feet) Nigeria (Dollars per Thousand Cubic Feet) Price of Lake Charles, LA Natural Gas LNG Imports from Nigeria (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's NA 2000's 4.37 5.56 3.21 4.66 5.61 7.44 6.78 6.98 8.68 3.50 2010's 4.06 -- -- -- -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 4/29/2016 Next Release Date:

  8. Charles Newcomb

    Broader source: Energy.gov [DOE]

    Charles Newcomb is the Wind for Schools Coordinator at DOE’s National Renewable Energy Laboratory.

  9. Charles Wilson

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Charles Townes - the Maser and the Laser Resources with Additional Information * Awards and Honors Charles Townes Photo Courtesy of Lawrence Berkeley National Laboratory Charles Hard Townes was educated at Furman University (B.A. in Modern Languages and B.S. in Physics in 1935), at Duke University (M.A. in Physics in 1937), and at the California Institute of Technology (Ph.D. in Physics in 1939). ' Townes was a member of the technical staff of the Bell Telephone Laboratories from 1939 to 1947.

  10. Charles Elachi

    Broader source: Energy.gov [DOE]

    Charles Elachi is the Director of the Jet Propulsion Laboratory and Vice President of California Institute of Technology. He is a Professor of Electrical Engineering and Planetary Science at...

  11. Charles Mix County, South Dakota: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Zone Subtype A. Places in Charles Mix County, South Dakota Castalia, South Dakota Dante, South Dakota Geddes, South Dakota Lake Andes, South Dakota Marty, South Dakota...

  12. Charles Worthington | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Charles Worthington Charles Worthington is a product designer and software developer serving as a Presidential Innovation Fellow working on Open Data Initiatives at the Department of Energy. Previously, he founded Gray Duck Labs, a web/mobile product design firm. In his spare time, Charles works on Preamp.fm, a live music discovery app. Charles holds a BA in Social Studies from Harvard University. He lives in Washington, DC, with his fiancée. Most Recent American Energy Data Challenge

  13. Signature of Charles Spencer Signature of Charles Spencer Signature of Charles Spencer

    National Nuclear Security Administration (NNSA)

    Spencer Signature of Charles Spencer Signature of Charles Spencer Signature of Steven Erhart Signature of Steven Erhart Signature of Steven Erhart Signature of Willie Wilson Signature of Willie Wilson Signature of Willie Wilson Signature of Jill Albaugh

  14. Charles Russomanno | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Russomanno About Us Charles Russomanno - Senior Technology Advisor Charles Russomanno is Senior Technology Advisor for the Office of the Under Secretary of Science and Energy (S-4). In this capacity he has been integral to conceptualizing, defining, and communicating the mission and function of the new Office of Technology Transitions (OTT) for the Department. Prior to coming on board with S-4, Charles completed a 2-year detail with DOE's, Office of Energy Efficiency and Renewable Energy,

  15. Charles McConnell | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Charles McConnell About Us Charles McConnell - Former Assistant Secretary for Fossil Energy Charles McConnell Charles McConnell is the former Assistant Secretary for Fossil Energy. Most Recent Adding "Utilization" to Carbon Capture and Storage May 1

  16. Profile for Thomas Charles Terwilliger

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Thomas Charles Terwilliger Profile Pages View homepages for scientists and researchers. Explore potential collaborations and project opportunities. Search the extensive range of capabilities by keyword to quickly find who and what you are looking for. submit Email Phone (505) 667-0072 Thomas Charles Terwilliger Thomas Terwilliger Expertise Follow Tom Terwilliger on: ResearchGate LinkedIn Twitter Macromolecular X-ray crystallography - Development of algorithms and software for determining crystal

  17. Fry receives Charles W. Briggs Award

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fry receives Charles W. Briggs Award Fry receives Charles W. Briggs Award The ASTM International Committee E07 on Nondestructive Testing has honored David Fry with the Charles W. Briggs Award. June 2, 2014 David Fry David Fry Fry was recognized for his continuous and outstanding contributions to the standards development work of the committee through its subcommittees, sections and task groups. The ASTM International Committee E07 on Nondestructive Testing has honored David Fry of Applied

  18. Saint Charles International | Open Energy Information

    Open Energy Info (EERE)

    France Product: A European fruit and vegetable distribution, transportation and logistics platform References: Saint Charles International1 This article is a stub. You can...

  19. Signature of Charles F. McMillan Signature of Charles F. McMillan

    National Nuclear Security Administration (NNSA)

    F. McMillan Signature of Charles F. McMillan Signature of Charles F. McMillan Signature of Charles F. McMillan Signature of Charles F. McMillan Signature of Charles F. McMillan Signature of Kimberly Davis LebakSignature of Kimberly Davis Lebak Signature of Kimberly Davis LebakSignature of Kimberly Davis Lebak Signature of Kimberly Davis LebakSignature of Kimberly Davis Lebak Signature of Kimberly Davis LebakSignature of Kimberly Davis Lebak Signature of Kimberly Davis LebakSignature of Kimberly

  20. Charles Townes, the Maser, and the Laser

    Office of Scientific and Technical Information (OSTI)

    Charles Townes - the Maser and the Laser Resources with Additional Information * Awards and Honors Charles Townes Photo Courtesy of Lawrence Berkeley National Laboratory Charles Hard Townes was educated at Furman University (B.A. in Modern Languages and B.S. in Physics in 1935), at Duke University (M.A. in Physics in 1937), and at the California Institute of Technology (Ph.D. in Physics in 1939). ' Townes was a member of the technical staff of the Bell Telephone Laboratories from 1939 to 1947.

  1. PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Princeton Plasma Physics Lab PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi By John Greenwald and Raphael Rosen October 12, 2015 Tweet Widget Google Plus One Share on Facebook PPPL engineer Charles Neumeyer and PPPL physicist Rajesh Maingi (Photo by Elle Starkman/PPPL Office of Communications) PPPL engineer Charles Neumeyer and PPPL physicist Rajesh Maingi Gallery: PPPL engineer Charles Neumeyer (Photo by Elle Starkman/ PPPL Office of Communications) PPPL engineer Charles

  2. Lake Charles Carbon Capture and Sequestration Project U. S. Department...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Leucadia must implement additional mitigation as required and described in the permit(s). ... of the water supply and hydrogen pipeline, Leucadia must contact Louisiana ...

  3. EIS-0491: Lake Charles Liquefaction Project; Calcasieu Parish, Louisiana

    Broader source: Energy.gov [DOE]

    The Federal Energy Regulatory Commission (FERC) prepared, with DOE as a cooperating agency, an EIS to analyze the potential environmental impacts of a proposal to expand an existing liquefied natural gas (LNG) import terminal in Calcasieu Parish, Louisiana, by constructing and operating natural gas liquefaction and exportation capabilities.DOE, Office of Fossil Energy, has an obligation under Section 3 of the Natural Gas Act to authorize the import and export of natural gas, including LNG, unless it finds that the import or export is not consistent with the public interest.

  4. EIS-0498: Magnolia LNG and Lake Charles Expansion Projects; Calcasieu...

    Office of Environmental Management (EM)

    3 of the Natural Gas Act to authorize the import and export of natural gas, including LNG, unless it finds that the import or export is not consistent with the public interest. ...

  5. DOE Zero Energy Ready Home Case Study: Charles Thomas Homes,...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Charles Thomas Homes, Anna Model, Omaha, NE DOE Zero Energy Ready Home Case Study: Charles Thomas Homes, Anna Model, Omaha, NE Case study of a DOE 2015 Housing Innovation Award ...

  6. Charles Mix Electric Assn, Inc | Open Energy Information

    Open Energy Info (EERE)

    Charles Mix Electric Assn, Inc Jump to: navigation, search Name: Charles Mix Electric Assn, Inc Place: South Dakota Phone Number: 605-487-7321 Website: www.cme.coop Twitter:...

  7. PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Princeton Plasma Physics Lab PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi By John GreenwaldRaphael Rosen October 12, 2015 Tweet Widget Google Plus One Share on Facebook PPPL engineer Charles Neumeyer and PPPL physicist Rajesh Maingi (Photo by Photo Credit: Elle Starkman/PPPL Office of Communications) PPPL engineer Charles Neumeyer and PPPL physicist Rajesh Maingi Gallery: PPPL engineer Charles Neumeyer (Photo by Photo Credit: Elle Starkman/PPPL Office of Communications)

  8. St. Charles County, Missouri: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Missouri O'Fallon, Missouri Portage Des Sioux, Missouri St. Charles, Missouri St. Paul, Missouri St. Peters, Missouri Weldon Spring Heights, Missouri Weldon Spring, Missouri...

  9. Charles County, Maryland: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Bryans Road, Maryland Hughesville, Maryland Indian Head, Maryland La Plata, Maryland Port Tobacco Village, Maryland Potomac Heights, Maryland St. Charles, Maryland Waldorf,...

  10. Charles Motel & Bathhouse Pool & Spa Low Temperature Geothermal...

    Open Energy Info (EERE)

    Temperature Geothermal Facility Facility Charles Motel & Bathhouse Sector Geothermal energy Type Pool and Spa Location Truth or Consequences, New Mexico Coordinates 33.1284047,...

  11. PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PPPL honors engineer Charles Neumeyer and physicist Rajesh Maingi By John GreenwaldRaphael Rosen October 12, 2015 Tweet Widget Google Plus One Share on Facebook PPPL engineer ...

  12. The Wizard of Schenectady: Charles Proteus Steinmetz | GE Global...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    week the Smithsonian's "Past Imperfect" blog highlighted a man near and dear to the heart of GE Global Research, Charles Proteus Steinmetz. The article paints a really...

  13. DOE Tour of Zero Floorplans: Anna Model by Charles Thomas Homes |

    Energy Savers [EERE]

    Department of Energy Anna Model by Charles Thomas Homes DOE Tour of Zero Floorplans: Anna Model by Charles Thomas Homes DOE Tour of Zero Floorplans: Anna Model by Charles Thomas Homes

  14. Charles Duncan Sworn in as Secretary of Energy | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration Charles Duncan Sworn in as Secretary of Energy Charles Duncan Sworn in as Secretary of Energy Washington, DC Charles W. Duncan, Jr., is sworn in as second Secretary of Energy

  15. DOE Tour of Zero: Anna Model by Charles Thomas Homes | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Anna Model by Charles Thomas Homes DOE Tour of Zero: Anna Model by Charles Thomas Homes 1 of 11 Charles Thomas Homes built this 4,353-square-foot custom home in Omaha, Nebraska, to ...

  16. Peter Fischer' * and Charles S. Fadley^''

    Office of Scientific and Technical Information (OSTI)

    Probing nanoscale behavior of m agnetic materials with soft X-ray spectromicroscopy Peter Fischer' * and Charles S. Fadley^'' ' C enter fo r X -ra y O ptics, L aw ren ce B erkeley N ational L aboratory, B erkeley, C A 9 4270, U S A , e-m ail: P JF isch er@ lb l.g o v ^D epartm ent o f P hysics, U n iv ersity o f C alifornia, D avis, C A 95616, U S A ■'Material S cien ces D iv isio n , L aw ren ce B erkeley N ational Laboratoi-y, B erkeley, C A 94270, U S A Abstract T h e m a g n e tic p ro p e

  17. TBU-0067- In the Matter of Charles Montano

    Broader source: Energy.gov [DOE]

    Charles Montano (the complainant), appeals the dismissal of his complaint of retaliation filed under 10 C.F.R. Part 708, the Department of Energy (DOE) Contractor Employee Protection Program. The...

  18. Charles City (1Q08) Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location Charles City IA Coordinates 43.049152, -92.734151 Show Map Loading map... "minzoom":false,"mappings...

  19. Charles City (2Q08) Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location Charles City IA Coordinates 43.004101, -92.722392 Show Map Loading map... "minzoom":false,"mappings...

  20. TBU-0026- In the Matter of Charles L. Evans

    Broader source: Energy.gov [DOE]

    Charles Evans, a former employee of Fluor Hanford Inc. (Fluor), a Department of Energy (DOE) contractor, appeals the DOE Richland Operations Office=s (Richland) dismissal of the whistleblower...

  1. Summer 2010 Intern Project- Charles Buhler | Center for Energy Efficient

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Materials Charles Buhler DESIGNING A MIDDLE ANTIREFLECTIVE COATING TO ALLOW LIGHT TO THE LOWER BANDGAP CELLS AND REFLECT HIGHER ENERGY PHOTONS BACK TO THE TOP CELLS TO INCREASE PERFORMANCE FOR A FOUR-JUNCTION SOLAR CELL Charles Buhler Physics UC Santa Barbara Mentor: Chieh-Ting Lin Faculty Advisor: John Bowers Department: Electrical and Computer Engineering As photovoltaic cells are made to absorb a larger part of the solar spectrum, antireflective (AR) coatings need to be better designed to

  2. Metered Evaporator for Tokamak Wall Conditioning --- Inventor(s): Charles

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    H. Skinner, Dennis Mansfield, Henry Kugel, Hans Schneider and Lane Roquemore | Princeton Plasma Physics Lab Metered Evaporator for Tokamak Wall Conditioning --- Inventor(s): Charles H. Skinner, Dennis Mansfield, Henry Kugel, Hans Schneider and Lane Roquemore A novel lithium evaporator for the controlled introduction of lithium into tokamaks for wall conditioning is described. The concept uses a Li granule injector with a heated in-vessel yttrium crucible to evaporate a controlled amount of

  3. Red Lake Weatherization Project

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    is located at Red Lake Housing Authority Red Lake Band of Chippewa Indians Red Lake , MN Red Lake Band of Chippewas Area overview Reservation (Diminished Lands) and Surroundings ...

  4. Charles Byers, Summary Remarks | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Charles Byers, Summary Remarks Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Reports and Activities Science Highlights Principal Investigators' Meetings BES Home Third DOE BES Separations Research Workshop Charles Byers, Summary Remarks Print Text Size: A A A FeedbackShare Page Third DOE/Basic Energy Sciences Separations Research Workshop Savannah DeSoto Hilton, Savannah, Georgia May 12-14, 1999 Summary Remarks Charles H. Byers IsoPro

  5. Dr. Charles (Chuck) Peden | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Charles (Chuck) Peden Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB ... His current research programs address numerous aspects of the physical and chemical ...

  6. Charles Byers, Summary Remarks | U.S. DOE Office of Science ...

    Office of Science (SC) Website

    Charles Byers, Summary Remarks Chemical Sciences, Geosciences, & Biosciences (CSGB) ... We know of several collaborations that were begun at this meeting. BES Chemical Sciences ...

  7. HIA 2015 DOE Zero Energy Ready Home Case Study: Charles Thomas...

    Energy Savers [EERE]

    ... gas furnace; 14 SEER AC. * Hot Water: 50-gallon heat pump water heater. * Lighting: 100% LED * Appliances: ENERGY STAR-rated dishwasher and ceiling fans. * Solar: Charles ...

  8. Charles "Chuck" Farrar to receive DeMichele Award

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Farrar to receive DeMichele Award Charles "Chuck" Farrar to receive DeMichele Award The award is presented for demonstrated "exemplary service and support of promoting the science and educational aspects of modal analysis technology." November 21, 2012 Charles "Chuck" Farrar Charles "Chuck" Farrar Charles "Chuck" Farrar, leader of LANL's Engineering Institute, will receive the 2013 DeMichele Award from the Society for Experimental Mechanics. The

  9. AUTHORS Charles E. Whittle Edward L. Allen Chester L. Cooper

    Office of Scientific and Technical Information (OSTI)

    AUTHORS Charles E. Whittle Edward L. Allen Chester L. Cooper Herbert G. MacPherson Doan L. Phung Alan D. Poole William G. Pollard Ralph M. Rotty Ned L. Treat Alvin M. Weinbecg OTHER CONTRIBUTORS William U. Chandler Alfred M. Perry Frances C. Edmonds David B. Reister James A. Edmonds Ernest G. Silver Harold L. Federow Paul C. Tompkins James A. Lane Eva M. Wike Gregg Marland Leon W. Zelby This document is PUBLICLY RELEASABLE Authorizing C&icial Date: Id/25/11. C W L W ORAU/lEA 76-4 September

  10. Charles D. Young Project Engineer Government Support Directorate

    Office of Legacy Management (LM)

    Please call if you have questions regarding the attached recommendation. i?&,o-o; ~~~pApv $l$I Charles D. Young Project Engineer Government Support Directorate Architecture Planning and Technology Division CDY/smb Attachment cc: J. Fiore ;;,ewis (w/o) TH' E AEROSPACE CORPORATION i ' 0 A Suite 7900, 955 L' Enfam Plaza. S. W., Woshingron. D.C. 20024-2174. Tekphonc (202) 488-6000 7117-03.87.cdy.43 23 September 1987 CA Mr. Andrew Wallo, III, NE-23 Division of Facility & Site Decosunissioning

  11. Andrew Lake

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jason Zurawski, Sowmya Balasubramanian, Aaron Brown, Ezra Kissel, Andrew Lake, Martin Swany, Brian Tierney, Matt Zekauskas, "perfSONAR: On-board Diagnostics for Big Data", 1st ...

  12. EIS-0464: EPA Notice of Availability of the Draft Environmental Impact Statement

    Broader source: Energy.gov [DOE]

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas

  13. EIS-0464: EPA Notice of Availability of Final Environmental Impact Statement

    Office of Energy Efficiency and Renewable Energy (EERE)

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas

  14. EIS-0464: DOE Notice of Availability of the Draft Environmental Impact Statement

    Broader source: Energy.gov [DOE]

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas

  15. EIS-0464: Draft Environmental Impact Statement

    Broader source: Energy.gov [DOE]

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas

  16. EIS-0464: Final Environmental Impact Statement

    Broader source: Energy.gov [DOE]

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas

  17. Magnolia LNG and Lake Charles Expansion Projects Final Environmental Impact Statement

    Energy Savers [EERE]

    Magna E-Car Opening Magna E-Car Opening April 27, 2012 - 4:40pm Addthis Vehicle Technologies Program Manager Patrick B. Davis gets ready to cut the ribbon at Magna E-Car's new electric drive component plant in Michigan. From left: Mike Finney - CEO, Michigan Economic Development Corporation; Gary Meyers - VP/General Manager, Magna E-Car USA, LP; Pat Davis; Kevin Pavlov - Chief Operating Officer, Magna E-Car Systems; Marilyn Hoffman, Township Supervisor, Grand Blanc Township, Michigan; Joseph

  18. EIS-0464: Lake Charles Carbon Capture and Storage (CCS) Project in Calcasieu Parish, Louisiana

    Broader source: Energy.gov [DOE]

    This EIS evaluates the potential environmental impacts of providing financial assistance for the construction and operation of a project proposed by Leucadia Energy, LLC. DOE selected this project for an award of financial assistance through a competitive process under the Industrial Carbon Capture and Sequestration Program.

  19. Price of Lake Charles, LA Natural Gas LNG Imports from Trinidad and Tobago

    U.S. Energy Information Administration (EIA) Indexed Site

    (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's NA 2000's 3.93 4.25 3.40 5.10 5.44 6.55 6.40 7.02 -- 3.01 2010's -- 4.18 2.10 -- --

  20. Price of Lake Charles, LA Natural Gas LNG Imports from Trinidad and Tobago

    U.S. Energy Information Administration (EIA) Indexed Site

    (Dollars per Thousand Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2011 4.18 2012 2.10

  1. WBU-15-0003 - In the Matter of Charles W. Trask III | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3 - In the Matter of Charles W. Trask III WBU-15-0003 - In the Matter of Charles W. Trask III On April 2, 2015, the OHA issued a decision denying, due to lack of jurisdiction, an Appeal filed by Mr. Charles W. Trask III of the dismissal of his whistleblower complaint by the Whistleblower Program Manager for the Employee Concerns Program of the National Nuclear Security Administration. Mr. Trask filed the Complaint against his former employer, Los Alamos National Security, LLC (LANS), under the

  2. VWA-0014- In the Matter of Charles Barry DeLoach

    Broader source: Energy.gov [DOE]

    This Decision involves a whistleblower complaint filed by Charles Barry DeLoach (DeLoach) under the Department of Energy's (DOE) Contractor Employee Protection Program, 10 C.F.R. Part 708. For a...

  3. Charles Roger Alcock, 1996 | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Charles Roger Alcock, 1996 The Ernest Orlando Lawrence Award Lawrence Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's...

  4. Charles McMillan to lead Los Alamos National Laboratory's Weapons...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Charles McMillan to lead Los Alamos National Laboratory's Weapons Program He will provide oversight and direction for the nuclear weapons program at Los Alamos to accomplish the ...

  5. Charles V. Jakowatz, 1996 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Charles V. Jakowatz, 1996 The Ernest Orlando Lawrence Award Lawrence Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's Ceremony...

  6. Charles C. Cremer, 1972 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Charles C. Cremer, 1972 The Ernest Orlando Lawrence Award Lawrence Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's Ceremony...

  7. Declaration of Charles Wodrich in Support of Supplemental Comments of the

    Energy Savers [EERE]

    Plumbing Manufacturers Institute Regarding the Economic Impacts of the Proposed Definition of "Showerhead," Docket No. EERE-2010-BT-NOA-0016 | Department of Energy Declaration of Charles Wodrich in Support of Supplemental Comments of the Plumbing Manufacturers Institute Regarding the Economic Impacts of the Proposed Definition of "Showerhead," Docket No. EERE-2010-BT-NOA-0016 Declaration of Charles Wodrich in Support of Supplemental Comments of the Plumbing Manufacturers

  8. DOE Zero Energy Ready Home Case Study: Charles Thomas Homes, Anna Model,

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Omaha, NE | Department of Energy Charles Thomas Homes, Anna Model, Omaha, NE DOE Zero Energy Ready Home Case Study: Charles Thomas Homes, Anna Model, Omaha, NE Case study of a DOE 2015 Housing Innovation Award winning custom home in the cold climate that got a HERS 48 without PV, with 2x6 24" on center walls with R-23 blown fiberglass, ocsf at rim joists, basement with plus 2x4 stud walls with R-23 blown fiberglass, with R-20 around slab, R-38 under slab; a vented attic with R-100 blown

  9. Charles V. Shank, 2014 | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Charles V. Shank, 2014 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's Charles V. Shank, 2014 Print Text Size: A A A FeedbackShare Page Senior Fellow, Howard Hughes Medical Institute, and

  10. VWZ-0016- In the Matter of Charles Montaño

    Broader source: Energy.gov [DOE]

    This decision considers a Motion to Dismiss filed by Charles Montaño (Montaño) on October 4, 1999. In his Motion, Montaño seeks dismissal of the hearing scheduled to begin on November 16, 1999 and...

  11. MEMORANDUM FOR DISTRIBUTION FROM: CHARLES E. ANDERSON PRINCIPAL DEPUTY ASSISTANT SECRETARY FOR

    Energy Savers [EERE]

    - - Washington, DC 20585 April 4 , 2007 MEMORANDUM FOR DISTRIBUTION FROM: CHARLES E. ANDERSON PRINCIPAL DEPUTY ASSISTANT SECRETARY FOR ENVIRONMENTAL MANAGEMENT SUBJECT: Requirements to Coordinate Regulatory Negotiations with the Office of Regulatory Compliance In a memorandum dated December 28,2006, Assistant Secretary Rispoli announced the dissolution of the Office of Environmental Management (EM) Configuration Control Board and . the creation of a new EM Acquisition Advisory Board (EMAAB). In

  12. Particle Gas Target for High Density Laser Produced Plasmas Charles H.

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Skinner, Nathaniel Fisch, and Ernest Valeo | Princeton Plasma Physics Lab Particle Gas Target for High Density Laser Produced Plasmas Charles H. Skinner, Nathaniel Fisch, and Ernest Valeo This invention is a novel "particle gas" cell for achieving plasma densities higher than accessible in conventional gas jets. The particle gas cell has a silicon nitride window and is partially filled with melamine spheres in the sub-micron to micron diameter range. The cell is acoustically

  13. Lakes, Electricity and You | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Lakes, Electricity and You Lakes, Electricity and You Why It's So Important That Lakes Are Used To Generate Electricity PDF icon Lakes, Electricity and You More Documents & ...

  14. Pyramid Lake Paiute Tribe - Pyramid Lake Energy Project - Geothermal Assessment

    Energy Savers [EERE]

    Tribe Pyramid Lake Paiute Tribe Pyramid Lake Energy Project Pyramid Lake Energy Project Geothermal Assessment Geothermal Assessment Pyramid Lake Paiute Reservation 40 miles north of Reno 475,000 acres Pyramid Lake 125,000 surface acres Northern Reservation Needles Area Needles Geyser Needles Geyser Exploration conducted Exploration conducted in 1968 in 1968 Hot water was found Hot water was found at 160 degrees f at 160 degrees f Was not considered Was not considered feasible feasible PLEP

  15. Honey Lake Geothermal Area | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Honey Lake Geothermal Area Honey Lake Geothermal Area The Honey Lake geothermal area is located in Lassen County, California and Washoe County, Nevada. There are three geothermal ...

  16. Lakes_Elec_You

    Office of Environmental Management (EM)

    ... Florida Jim Woodruff Preference Customers 115 Lincoln Drive Chattahoochee, FL 32324 850663-4475 Georgia Municipal Electric Authority of Georgia Atlanta, GA 30328-4640 770952-5445 ...

  17. July 24, 2009; Visiting Speakers Program - Crossing the Valley of Death - The Role of the SBIR Program by Dr. Charles Wessner

    Energy Savers [EERE]

    � Crossing the Valley of Death Crossing the Valley of Death Crossing the Valley of Death Crossing the Valley of Death The Role of the SBIR Program Department of Energy-NAPA HSS Visiting Speaker Program July 24, 2009 Charles W. Wessner, Ph.D. Director, Technology, Innovation, and Entrepreneurship The National Academies 1 © Charles W. Wessner Ph.D. The Good News and the Bad News New, Substantial Commitments for Technology Innovation, but Myths about the Innovation Process Remain 2009 Stimulus

  18. Ground-water flow and ground- and surface-water interaction at the Weldon Spring quarry, St. Charles County, Missouri

    SciTech Connect (OSTI)

    Imes, J.L.; Kleeschulte, M.J.

    1997-12-31

    Ground-water-level measurements to support remedial actions were made in 37 piezometers and 19 monitoring wells during a 19-month period to assess the potential for ground-water flow from an abandoned quarry to the nearby St. Charles County well field, which withdraws water from the base of the alluvial aquifer. From 1957 to 1966, low-level radioactive waste products from the Weldon Spring chemical plant were placed in the quarry a few hundred feet north of the Missouri River alluvial plain. Uranium-based contaminants subsequently were detected in alluvial ground water south of the quarry. During all but flood conditions, lateral ground-water flow in the bedrock from the quarry, as interpreted from water-table maps, generally is southwest toward Little Femme Osage Creek or south into the alluvial aquifer. After entering the alluvial aquifer, the ground water flows southeast to east toward a ground-water depression presumably produced by pumping at the St. Charles County well field. The depression position varies depending on the Missouri River stage and probably the number and location of active wells in the St. Charles County well field.

  19. DOE - Office of Legacy Management -- Salt_Lake

    Office of Legacy Management (LM)

    SaltLake Salt Lake City Sites utmap Salt Lake City Disposal Site Salt Lake City Processing Site Last Updated: 6172015...

  20. General Atomics (GA) | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    General Atomics (GA) Subscribe to RSS - General Atomics (GA) General Atomics Image: General Atomics (GA) The Scorpion's Strategy: "Catch and Subdue" Read more about The Scorpion's...

  1. Geological History of Lake Lahontan, a Quaternary Lake of Northwestern...

    Open Energy Info (EERE)

    a Quaternary Lake of Northwestern Nevada Abstract Abstract unavailable. Author Israel C. Russell Organization U.S. Geological Survey Published U.S. Government Printing...

  2. Method for lake restoration

    DOE Patents [OSTI]

    Dawson, Gaynor W.; Mercer, Basil W.

    1979-01-01

    A process for removing pollutants or minerals from lake, river or ocean sediments or from mine tailings is disclosed. Magnetically attractable collection units containing an ion exchange or sorbent media with an affinity for a chosen target substance are distributed in the sediments or tailings. After a period of time has passed sufficient for the particles to bind up the target substances, a magnet drawn through the sediments or across the tailings retrieves the units along with the target substance.

  3. Iowa Lakes Electric Cooperative | Open Energy Information

    Open Energy Info (EERE)

    Iowa Lakes Electric Cooperative Jump to: navigation, search Name: Iowa Lakes Electric Cooperative Place: Estherville, Iowa Zip: 51334 Sector: Wind energy Product: Iowa-based...

  4. Meadow Lake II | Open Energy Information

    Open Energy Info (EERE)

    II Jump to: navigation, search Name Meadow Lake II Facility Meadow Lake II Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Horizon Wind...

  5. Summer Lake Aquaculture Aquaculture Low Temperature Geothermal...

    Open Energy Info (EERE)

    Summer Lake Aquaculture Aquaculture Low Temperature Geothermal Facility Jump to: navigation, search Name Summer Lake Aquaculture Aquaculture Low Temperature Geothermal Facility...

  6. Blue Lake Power | Open Energy Information

    Open Energy Info (EERE)

    Power Jump to: navigation, search Name: Blue Lake Power Place: Redding, California Zip: 96001 Sector: Renewable Energy Product: Blue Lake Power is a wholey owned subsidiary of...

  7. Lake Region State College | Open Energy Information

    Open Energy Info (EERE)

    College Jump to: navigation, search Name Lake Region State College Facility Lake Region State College Sector Wind energy Facility Type Community Wind Facility Status In Service...

  8. Crow Lake Wind | Open Energy Information

    Open Energy Info (EERE)

    Wind Jump to: navigation, search Name Crow Lake Wind Facility Crow Lake Wind Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Prairie Winds...

  9. Lake Erie Alternative Power | Open Energy Information

    Open Energy Info (EERE)

    Power Jump to: navigation, search Name Lake Erie Alternative Power Facility Lake Erie Alternative Power Sector Wind energy Facility Type Offshore Wind Facility Status Proposed...

  10. Curiosity Rover confirms existence of a large ancient lake on...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Deputy Laboratory Director Paul Henry, Laboratory Director Charles McMillan and Amy Wong. Curiosity Rover bears three LANL technologies Contact Los Alamos National Laboratory...

  11. EIS-0464: DOE Notice of Availability of the Draft Environmental...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EIS-0464: DOE Notice of Availability of the Draft Environmental Impact Statement Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, ...

  12. EIS-0464: Mitigation Action Plan | Department of Energy

    Office of Environmental Management (EM)

    Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas This Mitigation Action Plan (MAP) briefly describes the mitigation actions ...

  13. iccs-leucadia | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Industrial Carbon Capture and Storage: Area 1 Leucadia Energy, LLC: Lake Charles Carbon Capture & Sequestration Project Lake Charles, Louisiana PROJECT TIMELINE PROJECT FACT SHEET...

  14. EIS-0464: EPA Notice of Availability of Final Environmental Impact...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EPA Notice of Availability of Final Environmental Impact Statement Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas EPA...

  15. EIS-0464: EPA Notice of Availability of the Draft Environmental...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Notice of Availability of the Draft Environmental Impact Statement Lake Charles Carbon Capture and Sequestration Project, Lake Charles, Louisiana and Brazoria County, Texas The...

  16. EIS-0464: Notice of Intent to Prepare an Environmental Impact...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Notice of Intent to Prepare an Environmental Impact Statement Lake Charles Carbon Capture and Sequestration Project, Lake Charles, LA Notice of Intent To Prepare an...

  17. Hot Lake RV Park Space Heating Low Temperature Geothermal Facility...

    Open Energy Info (EERE)

    Lake RV Park Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Hot Lake RV Park Space Heating Low Temperature Geothermal Facility Facility Hot Lake...

  18. NBP RFI: Communications Requirements- Comments of Lake Region...

    Energy Savers [EERE]

    Lake Region Electric Cooperative- Minnesota NBP RFI: Communications Requirements- Comments of Lake Region Electric Cooperative- Minnesota Comments of Lake Region Electric ...

  19. City of Detroit Lakes, Minnesota (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Lakes, Minnesota (Utility Company) Jump to: navigation, search Name: City of Detroit Lakes Place: Minnesota Website: www.ci.detroit-lakes.mn.usmai Facebook: https:...

  20. Soap Lake Pool & Spa Low Temperature Geothermal Facility | Open...

    Open Energy Info (EERE)

    Soap Lake Pool & Spa Low Temperature Geothermal Facility Jump to: navigation, search Name Soap Lake Pool & Spa Low Temperature Geothermal Facility Facility Soap Lake Sector...

  1. Spirit Lake II Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Lake School District Energy Purchaser Spirit Lake School District Location Spirit Lake IA Coordinates 43.411412, -95.09914 Show Map Loading map... "minzoom":false,"mappingse...

  2. Iowa Lakes Superior Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    search Name Iowa Lakes Superior Wind Farm Facility Iowa Lakes Superior Wind Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Iowa Lakes...

  3. Iowa Lakes Lakota Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    search Name Iowa Lakes Lakota Wind Farm Facility Iowa Lakes Lakota Wind Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Iowa Lakes...

  4. Fish Lake Valley Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Fish Lake Valley Geothermal Area (Redirected from Fish Lake Valley Area) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Fish Lake Valley Geothermal Area Contents 1...

  5. Investigation of the GaN-on-GaAs interface for vertical power device applications

    SciTech Connect (OSTI)

    Mreke, Janina Uren, Michael J.; Kuball, Martin; Novikov, Sergei V.; Foxon, C. Thomas; Hosseini Vajargah, Shahrzad; Wallis, David J.; Humphreys, Colin J.; Haigh, Sarah J.; Al-Khalidi, Abdullah; Wasige, Edward; Thayne, Iain

    2014-07-07

    GaN layers were grown onto (111) GaAs by molecular beam epitaxy. Minimal band offset between the conduction bands for GaN and GaAs materials has been suggested in the literature raising the possibility of using GaN-on-GaAs for vertical power device applications. I-V and C-V measurements of the GaN/GaAs heterostructures however yielded a rectifying junction, even when both sides of the junction were heavily doped with an n-type dopant. Transmission electron microscopy analysis further confirmed the challenge in creating a GaN/GaAs Ohmic interface by showing a large density of dislocations in the GaN layer and suggesting roughening of the GaN/GaAs interface due to etching of the GaAs by the nitrogen plasma, diffusion of nitrogen or melting of Ga into the GaAs substrate.

  6. Spirit Lake Tribe- 1995 Project

    Broader source: Energy.gov [DOE]

    A long-range goal of the Spirit Lake Nation is to develop a tribally owned and operated municipal power company. The tribe has been awarded a Western Area Power Administration (WAPA) allocation starting in the year 2001.

  7. GA SNC Solar | Open Energy Information

    Open Energy Info (EERE)

    GA-SNC Solar Place: Nevada Sector: Solar Product: Nevada-based PV project developer and joint venture of GA-Solar North America and Sierra Nevada Corp. References: GA-SNC...

  8. Land O Lakes Inc | Open Energy Information

    Open Energy Info (EERE)

    O Lakes Inc Jump to: navigation, search Name: Land O'Lakes Inc Place: Saint Paul, Minnesota Zip: 55164-0101 Product: Farmer-owned cooperative, marketer of dairy-based products for...

  9. Great Lakes Energy Coop | Open Energy Information

    Open Energy Info (EERE)

    Logo: Great Lakes Energy Coop Name: Great Lakes Energy Coop Address: PO Box 70 Place: Boyne City, MI Zip: 49712 Service Territory: Michigan Phone Number: 1-800-678-0411 Website:...

  10. ORISE Research Team Experiences: Joe Lake

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Joe Lake One-Time Student Intern has 'Second Life' as ORNL Mentor Joe Lake Joe Lake, a full-time software engineer for Oak Ridge National Laboratory's Computational Science and Engineering Division, is doing his part to help foster the next generation of scientists. As a former participant of both the ORISE-administered DOE Science Undergraduate Laboratory Internships (SULI) and Higher Education Research Experiences (HERE) programs, Lake is currently co-mentoring his fourth student. As a former

  11. GaInNAs laser gain

    SciTech Connect (OSTI)

    CHOW,WENG W.; JONES,ERIC D.; MODINE,NORMAND A.; KURTZ,STEVEN R.; ALLERMAN,ANDREW A.

    2000-05-23

    The optical gain spectra for GaInNAs/GaAs quantum wells are computed using a microscopic laser theory. From these spectra, the peak gain and carrier radiative decay rate as functions of carrier density are determined. These dependences allow the study of the lasing threshold current density of GaInNAs/GaAs quantum well structures.

  12. Urban lake sediment chemistry: Lake design, runoff, and watershed impact

    SciTech Connect (OSTI)

    Amalfi, F.A.

    1988-01-01

    Sediments of twenty-two urban lakes and stormwater discharge into five of the impoundments were analyzed for the presence of selected metallic priority pollutants, total petroleum hydrocarbons, and volatile and extractable organic compounds. The concentration (mg/kg dry weight) ranges of metals in lake sediments were: arsenic 7-29, cadmium < 0.5-0.5, chromium 14-55, lead <1-138, selenium <0.01-1.1, silver 0.2-2.1, copper 25-2760, nickel 5-40, and zinc 33.9-239. Concentrations of total petroleum hydrocarbons ranged from 30 to 4400 mg/kg (wet weight). Organic priority pollutants detected in the urban lake impoundments included tetrachlorethylene, 1,1,2-trichloroethane, trichlorofluoromethane, phthalate esters, chloroform, and dichlorobromomethane. Stormwater runoff contained measurable quantities of arsenic, chromium, lead, selenium, copper, nickel, zinc, and petroleum hydrocarbons; whereas organic priority pollutants were not detected. Stormwater runoff pollutant loads indicated that runoff provides a significant contribution of metals and petroleum hydrocarbons to lake sediments.

  13. Blue Lake Rancheria Kicks Off Solar System Construction | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Blue Lake Rancheria Kicks Off Solar System Construction Blue Lake Rancheria Kicks Off Solar System Construction May 9, 2016 - 5:54pm Addthis Blue Lake Rancheria Energy Director Jana Ganion flanked by Kernen Construction Site Supervisor Gavin Johnson (left) and Blue Lake Rancheria Facilities Director Neil Harris (right). Photo from Blue Lake Rancheria Blue Lake Rancheria Energy Director Jana Ganion flanked by Kernen Construction Site Supervisor Gavin Johnson (left) and Blue Lake

  14. GaAs, AlGaAs and InGaP Tunnel Junctions for Multi-Junction Solar Cells Under Concentration: Resistance Study

    SciTech Connect (OSTI)

    Wheeldon, Jeffrey F.; Valdivia, Christopher E.; Walker, Alex; Kolhatkar, Gitanja; Hall, Trevor J.; Hinzer, Karin; Masson, Denis; Riel, Bruno; Fafard, Simon; Jaouad, Abdelatif; Turala, Artur; Ares, Richard; Aimez, Vincent

    2010-10-14

    The following four TJ designs, AlGaAs/AlGaAs, GaAs/GaAs, AlGaAs/InGaP and AlGaAs/GaAs are studied to determine minimum doping concentration to achieve a resistance of <10{sup -4} {omega}{center_dot}cm{sup 2} and a peak tunneling current suitable for MJ solar cells up to 1500-suns concentration (operating current of 21 A/cm{sup 2}). Experimentally calibrated numerical models are used to determine how the resistance changes as a function of doping concentration. The AlGaAs/GaAs TJ design is determined to require the least doping concentration to achieve the specified resistance and peak tunneling current, followed by the GaAs/GaAs, and AlGaAs/AlGaAs TJ designs. The AlGaAs/InGaP TJ design can only achieve resistances >5x10{sup -4} {omega}cm{sup 2}.

  15. iccs-leucadia | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Industrial Carbon Capture and Storage: Area 1 Leucadia Energy, LLC: Lake Charles Carbon Capture & Sequestration Project Lake Charles, Louisiana PROJECT TIMELINE PROJECT FACT SHEET Leucadia Energy, LLC: Lake Charles Carbon Capture & Sequestration Project [PDF-485KB] (Nov 2014) PROGRAM PUBLICATIONS Information to come. PAPERS AND PRESENTATIONS Information to come. ENVIRONMENTAL REPORTS Lake Charles Draft Environmental Impact Statement [PDF-26MB] Lake Charles Draft Environmental Impact

  16. General Atomics (GA) Fusion News: A New Spin on Understanding...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    General Atomics (GA) Fusion News: A New Spin on Understanding Plasma Confinement American Fusion News Category: General Atomics (GA) Link: General Atomics (GA) Fusion News: A New ...

  17. Intense terahertz emission from molecular beam epitaxy-grown GaAs/GaSb(001)

    SciTech Connect (OSTI)

    Sadia, Cyril P.; Laganapan, Aleena Maria; Agatha Tumanguil, Mae; Estacio, Elmer; Somintac, Armando; Salvador, Arnel; Que, Christopher T.; Yamamoto, Kohji; Tani, Masahiko

    2012-12-15

    Intense terahertz (THz) electromagnetic wave emission was observed in undoped GaAs thin films deposited on (100) n-GaSb substrates via molecular beam epitaxy. GaAs/n-GaSb heterostructures were found to be viable THz sources having signal amplitude 75% that of bulk p-InAs. The GaAs films were grown by interruption method during the growth initiation and using various metamorphic buffer layers. Reciprocal space maps revealed that the GaAs epilayers are tensile relaxed. Defects at the i-GaAs/n-GaSb interface were confirmed by scanning electron microscope images. Band calculations were performed to infer the depletion region and electric field at the i-GaAs/n-GaSb and the air-GaAs interfaces. However, the resulting band calculations were found to be insufficient to explain the THz emission. The enhanced THz emission is currently attributed to a piezoelectric field induced by incoherent strain and defects.

  18. Superfund record of decision (EPA Region 7): Weldon Spring Quarry/Plant/Pits (USDOE), St. Charles, MO, September 30, 1998

    SciTech Connect (OSTI)

    1999-03-01

    The Weldon Spring Quarry is one of two noncontiguous areas that constitute the US Department of Energy`s (DOE) Weldon Spring site. The main area of the site is the chemical plant. Both areas are located in St. Charles County, Missouri, about 48 km (30 mi) west of St. Louis. The US Environmental Protection Agency (EPA) listed the quarry on the National Priorities List (NPL) in 1987, and the chemical plant area was added to the list in 1989. The quarry is about 6.4 km (4 mi) south-southwest of the chemical plant area; it is accessible from State Route 94 and is currently fenced and closed to the public. The quarry is approximately 300 m (1,000 ft) long by 140 m (450 ft) wide and covers an area of approximately 3.6 ha (9 acres). The quarry was used by the Army for disposal of chemically contaminated (explosive) materials in the 1940s and was later used for the disposal of radioactively contaminated material by the Atomic Energy Commission (AEC) in the 1960s. Approximately 110,000 m{sup 3} (144,000 yd{sup 3}) of soil and waste material was removed from the quarry and transported to the chemical plant area as part of completing the remedial action stipulated in the Record of Decision (ROD) for the Quarry Bulk Waste Operable Unit (DOE 1990). Bulk waste removal was completed in October 1995. These wastes have been placed in the disposal cell at the chemical plant. Prior to bulk waste removal, contaminated water contained in the quarry pond was also removed; approximately 170 million liters (44 million gal) have been treated as of March 1998.

  19. Great Lakes Steel -- PCI facility

    SciTech Connect (OSTI)

    Eichinger, F.T.; Dake, S.H.; Wagner, E.D.; Brown, G.S.

    1997-12-31

    This paper discusses the planning, design, and start-up of the 90 tph PCI facility for National Steel`s Great Lakes Steel Division in River Rouge, MI. This project is owned and operated by Edison Energy Services, and was implemented on a fast-track basis by Raytheon Engineers and Constructors, Babcock Material Handling, and Babcock and Wilcox. This paper presents important process issues, basic design criteria, an the challenges of engineering and building a state-of-the-art PCI facility in two existing plants. Pulverized coal is prepared at the River Rouge Power Plant of Detroit Edison, is pneumatically conveyed 6,000 feet to a storage silo at Great Lakes Steel, and is injected into three blast furnaces.

  20. CLEAR LAKE BASIN 2000 PROJECT

    SciTech Connect (OSTI)

    LAKE COUNTY SANITATION DISTRICT

    2003-03-31

    The following is a final report for the Clear Lake Basin 2000 project. All of the major project construction work was complete and this phase generally included final details and testing. Most of the work was electrical. Erosion control activities were underway to prepare for the rainy season. System testing including pump stations, electrical and computer control systems was conducted. Most of the project focus from November onward was completing punch list items.

  1. VEE-0018- In the Matter of Lakes Gas Company

    Broader source: Energy.gov [DOE]

    On March 12, 1996, the Lakes Gas Company (Lakes) of Forest Lake, Minnesota, filed an Application for Exception with the Office of Hearings and Appeals of the Department of Energy. In its...

  2. Medicine Lake Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Page Technique Activity Start Date Activity End Date Reference Material Geothermal Literature Review At Medicine Lake Geothermal Area (1984) Geothermal Literature Review 1984...

  3. Lake Pocotopaug, Connecticut: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Lake Pocotopaug, Connecticut: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 41.5984325, -72.5103654 Show Map Loading map......

  4. Glacial Lakes Energy | Open Energy Information

    Open Energy Info (EERE)

    search Name: Glacial Lakes Energy Place: Watertown, South Dakota Zip: 57201 Product: Bioethanol producer using corn as feedstock Coordinates: 43.197366, -88.720469 Show Map...

  5. Rice Lake Utilities | Open Energy Information

    Open Energy Info (EERE)

    Place: Wisconsin Phone Number: 715-234-7004 Website: www.ricelakeutilities.com Facebook: https:www.facebook.compagesCity-of-Rice-Lake-Utilities162786740407997 Outage...

  6. Lake Country Power | Open Energy Information

    Open Energy Info (EERE)

    Number: 8004219959 Website: www.lakecountrypower.coopinde Twitter: @LakeCountryPowe Facebook: https:www.facebook.comlakecountrypower Outage Hotline: 8004219959 Outage Map:...

  7. Spirit Lake Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Minnesota Windpower Energy Purchaser AlliantIES Utilities Location Spirit Lake IA Coordinates 43.411381, -95.10075 Show Map Loading map... "minzoom":false,"mappingse...

  8. Soda Lake Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Facility Add a new Operating Power Plant Developing Power Projects: 1 East Soda Lake Geothermal Project ( MW, Phase I - Resource Procurement and Identification) Add a new...

  9. Great Lakes Biofuels LLC | Open Energy Information

    Open Energy Info (EERE)

    Great Lakes Biofuels LLC Place: Madison, Wisconsin Zip: 53704 Sector: Services Product: Biodiesel research, consulting, management distribution and services company. Coordinates:...

  10. Obama Administration Hosts Great Lakes Offshore Wind Workshop in Chicago

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    with Great Lakes Wind Collaborative | Department of Energy Hosts Great Lakes Offshore Wind Workshop in Chicago with Great Lakes Wind Collaborative Obama Administration Hosts Great Lakes Offshore Wind Workshop in Chicago with Great Lakes Wind Collaborative October 28, 2010 - 12:00am Addthis WASHINGTON - The White House Council on Environmental Quality and the U.S. Department of Energy hosted a workshop with the Great Lakes Wind Collaborative in Chicago on October 26 - 27, 2010, focused on the

  11. New GaInP/GaAs/GaInAs, Triple-Bandgap, Tandem Solar Cell for High-Efficiency Terrestrial Concentrator Systems

    SciTech Connect (OSTI)

    Kurtz, S.; Wanlass, M.; Kramer, C.; Young, M.; Geisz, J.; Ward, S.; Duda, A.; Moriarty, T.; Carapella, J.; Ahrenkiel, P.; Emery. K.; Jones, K.; Romero, M.; Kibbler, A.; Olson, J.; Friedman, D.; McMahon, W.; Ptak, A.

    2005-11-01

    GaInP/GaAs/GaInAs three-junction cells are grown in an inverted configuration on GaAs, allowing high quality growth of the lattice matched GaInP and GaAs layers before a grade is used for the 1-eV GaInAs layer. Using this approach an efficiency of 37.9% was demonstrated.

  12. Similarities in shoreline response to Late Holocene lake-level variations in Lake Michigan

    SciTech Connect (OSTI)

    Thompson, T.A.; Baedke, S.J. )

    1992-01-01

    Beach ridges dating back to 2600 B.P. occur in embayments throughout Lake Michigan. Similarities in their geomorphic development are interpreted to be the product of three scales of lake-level variation. The largest of these embayments is roughly coincident with the Indiana shore of Lake Michigan known as the Toleston Beach. In the western part of the Toleston Beach, more than 150 beach ridges have formed in response to short-term variations in lake level occurring at a quasi-periodic interval of about 30 years. Bundles of five of these ridges merge eastward to form higher relief beach ridges that record an intermediate-term lake-level variation of about 150 years. Both the 30-year and 150-year lake-level events are superimposed on a longer term lake-level variation of about 600 years. Beach-ridge development in northern Lake Michigan reflects a similar response to late Holocene lake-level variations. For example, the southern embayment of the Platte Bay Unit of the Sleeping Bear Dunes National Lakeshore also contains a series of beach ridges that record three scales of lake-level variation. In this area, most of the beach ridges formed between 2600 and 1200 B.P., with individual ridges forming about every 29 years. Also recorded in this embayment are the time equivalent groupings of beach ridges every 150 and 600 years. Although embayments containing beach ridges in Lake Michigan may record different short-term lake-level variations in response to local depositional conditions within the embayment, the 150-year and 600-year variations appear to be represented throughout the lake. Relative lake-level curves for the Toleston Beach and the Platte Bay embayment are displaced by approximately 1.5 m. This displacement is accounted for under current models of isostasy for Lake Michigan.

  13. Overview Of The Lake City, California Geothermal System | Open...

    Open Energy Info (EERE)

    : GRC; p. () Related Geothermal Exploration Activities Activities (1) Geothermal Literature Review At Lake City Hot Springs Area (Benoit, Et Al., 2004) Areas (1) Lake City Hot...

  14. Lake County Ag Park Greenhouse Low Temperature Geothermal Facility...

    Open Energy Info (EERE)

    Ag Park Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Lake County Ag Park Greenhouse Low Temperature Geothermal Facility Facility Lake County Ag...

  15. EA-1996: Glass Buttes Radio Station, Lake County, Oregon | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6: Glass Buttes Radio Station, Lake County, Oregon EA-1996: Glass Buttes Radio Station, Lake County, Oregon SUMMARY The Bureau of Land Management (BLM), with DOE's Bonneville Power...

  16. Lake Gas Recovery Biomass Facility | Open Energy Information

    Open Energy Info (EERE)

    Gas Recovery Biomass Facility Jump to: navigation, search Name Lake Gas Recovery Biomass Facility Facility Lake Gas Recovery Sector Biomass Facility Type Landfill Gas Location Cook...

  17. Great Lakes Science Center Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Science Center Wind Farm Jump to: navigation, search Name Great Lakes Science Center Wind Farm Facility Great Lakes Science Center Sector Wind energy Facility Type Community Wind...

  18. Lake Elsinore Pool & Spa Low Temperature Geothermal Facility...

    Open Energy Info (EERE)

    Elsinore Pool & Spa Low Temperature Geothermal Facility Jump to: navigation, search Name Lake Elsinore Pool & Spa Low Temperature Geothermal Facility Facility Lake Elsinore Sector...

  19. Lake County, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    2 Climate Zone Subtype A. US Recovery Act Smart Grid Projects in Lake County, Florida City of Leesburg, Florida Smart Grid Project Energy Generation Facilities in Lake County,...

  20. Lake County, Illinois: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    North Chicago, Illinois Old Mill Creek, Illinois Palatine, Illinois Park City, Illinois Port Barrington, Illinois Riverwoods, Illinois Round Lake Beach, Illinois Round Lake...

  1. Wall Lake Municipal Utilities Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Municipal Utilities Energy Purchaser Wall Lake Municipal Utilities Location Wall Lake IA Coordinates 42.281965, -95.094098 Show Map Loading map... "minzoom":false,"mappings...

  2. Mercury Vapor At Medicine Lake Area (Kooten, 1987) | Open Energy...

    Open Energy Info (EERE)

    Medicine Lake Area (Kooten, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Medicine Lake Area (Kooten, 1987) Exploration...

  3. Ground Gravity Survey At Clear Lake Area (Skokan, 1993) | Open...

    Open Energy Info (EERE)

    Ground Gravity Survey At Clear Lake Area (Skokan, 1993) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity Survey At Clear Lake Area...

  4. Salt Lake City, Utah: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Salt Lake City, Utah: Energy Resources (Redirected from Salt Lake City, UT) Jump to: navigation, search Equivalent URI DBpedia Coordinates 40.7607793, -111.8910474 Show Map...

  5. Summer Lake Hot Springs Space Heating Low Temperature Geothermal...

    Open Energy Info (EERE)

    Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Summer Lake Hot Springs Space Heating Low Temperature Geothermal Facility Facility Summer Lake...

  6. DOE - Office of Legacy Management -- Ambrosia Lake Mill Site...

    Office of Legacy Management (LM)

    Surveillance Plan (LTSP) for the Ambrosia Lake, New Mexico Site. FACT SHEET Office of Legacy Management Ambrosia Lake, New Mexico, Disposal Site This fact sheet provides ...

  7. HERO BX formerly Lake Erie Biofuels | Open Energy Information

    Open Energy Info (EERE)

    HERO BX formerly Lake Erie Biofuels Jump to: navigation, search Name: HERO BX (formerly Lake Erie Biofuels) Place: Erie, Pennsylvania Product: Pennsylvania-based project developer...

  8. Pressure Temperature Log At Fish Lake Valley Area (DOE GTP) ...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Fish Lake Valley Area (DOE GTP)...

  9. Thermochronometry At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermochronometry At Fish Lake Valley Area (DOE GTP) Exploration...

  10. Static Temperature Survey At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Fish Lake Valley Area...

  11. Hyperspectral Imaging At Fish Lake Valley Area (Littlefield ...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Littlefield & Calvin, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Hyperspectral Imaging At Fish Lake Valley Area...

  12. Geothermometry At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Fish Lake Valley Area (DOE GTP) Exploration...

  13. Compound and Elemental Analysis At Fish Lake Valley Area (DOE...

    Open Energy Info (EERE)

    ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Fish Lake Valley Area (DOE GTP) Exploration Activity Details Location Fish Lake Valley Area...

  14. Geographic Information System At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At Fish Lake Valley...

  15. Fish Lake Valley Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Fish Lake Valley Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Fish Lake Valley Geothermal Area Contents 1 Area Overview 2 History and Infrastructure...

  16. Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Fish Lake Valley...

  17. Geothermal Literature Review At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Fish Lake Valley...

  18. Lake County, Oregon: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Zone Subtype B. Places in Lake County, Oregon Crump Geyser, Oregon Lakeview, Oregon Paisley, Oregon Retrieved from "http:en.openei.orgwindex.php?titleLakeCounty,Oregon&ol...

  19. DOE - Office of Legacy Management -- West Lake Landfill - MO...

    Office of Legacy Management (LM)

    Lake Landfill - MO 05 FUSRAP Considered Sites Site: West Lake Landfill (MO.05) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site Disposition:...

  20. City of Mountain Lake, Minnesota (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Lake, Minnesota (Utility Company) Jump to: navigation, search Name: City of Mountain Lake Place: Minnesota Phone Number: (507) 427-2999 Website: www.mountainlakemn.comindex.a...

  1. Converters Charles N Johnson

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to predict the propagation of sound underwater solve variations of the Helmholtz wave equation. These models become self-limiting to the problems they can most effectively solve...

  2. InGaAsN/GaAs heterojunction for multi-junction solar cells

    DOE Patents [OSTI]

    Kurtz, Steven R.; Allerman, Andrew A.; Klem, John F.; Jones, Eric D.

    2001-01-01

    An InGaAsN/GaAs semiconductor p-n heterojunction is disclosed for use in forming a 0.95-1.2 eV bandgap photodetector with application for use in high-efficiency multi-junction solar cells. The InGaAsN/GaAs p-n heterojunction is formed by epitaxially growing on a gallium arsenide (GaAs) or germanium (Ge) substrate an n-type indium gallium arsenide nitride (InGaAsN) layer having a semiconductor alloy composition In.sub.x Ga.sub.1-x As.sub.1-y N.sub.y with 0GaAs layer, with the InGaAsN and GaAs layers being lattice-matched to the substrate. The InGaAsN/GaAs p-n heterojunction can be epitaxially grown by either molecular beam epitaxy (MBE) or metalorganic chemical vapor deposition (MOCVD). The InGaAsN/GaAs p-n heterojunction provides a high open-circuit voltage of up to 0.62 volts and an internal quantum efficiency of >70%.

  3. Pyramid Lake Paiute Tribe - Geothermal Energy Assessment

    Energy Savers [EERE]

    Pursuing Open Data at the Department of Energy Pursuing Open Data at the Department of Energy December 3, 2013 - 3:11pm Addthis Pursuing Open Data at the Department of Energy Charles Worthington At the Department of Energy, we focus on using transformative science and technology solutions to ensure America's security and prosperity. Data is a key ingredient to this mission, which is why we are so excited about the Open Data movement. We believe providing open access to energy data can accelerate

  4. O:\IM-20\E-Government Program Office\FDMS\FDMS database\DOE\2011\DOE-HQ-2011-0014 - Daniel Cohen - GC\Comments from FDMS\Charles W Adams DRAFT-0005.html

    Energy Savers [EERE]

    %20Daniel%20Cohen%20-%20GC/Comments%20from%20FDMS/Charles%20W%20Adams%20DRAFT-0005.html[3/23/2011 2:17:13 PM] PUBLIC SUBMISSION As of: March 23, 2011 Received: March 21, 2011 Status: Pending_Post Tracking No. 80c0d05f Comments Due: April 04, 2011 Submission Type: Web Docket: DOE-HQ-2011-0014 Reducing Regulatory Burden Comment On: DOE-HQ-2011-0014-0001 Reducing Regulatory Burden Document: DOE-HQ-2011-0014-DRAFT-0005 Comment on FR Doc # 2011-02368 Submitter Information Name: Charles W Adams

  5. Magnetism and transport properties of epitaxial Fe-Ga thin films on GaAs(001)

    SciTech Connect (OSTI)

    Duong Anh Tuan; Shin, Yooleemi; Cho, Sunglae; Dang Duc Dung; Vo Thanh Son

    2012-04-01

    Epitaxial Fe-Ga thin films in disordered bcc {alpha}-Fe crystal structure (A2) have been grown on GaAs(001) by molecular beam epitaxy. The saturated magnetization (M{sub S}) decreased from 1371 to 1105 kA/m with increasing Ga concentration from 10.5 to 24.3 % at room temperature. The lattice parameter increased with the increase in Ga content because of the larger atomic radius of Ga atom than that of Fe. The increase in carrier density with Ga content caused in lower resistivity.

  6. Graphene induced remote surface scattering in graphene/AlGaN/GaN heterostructures

    SciTech Connect (OSTI)

    Liu, Xiwen; Li, Dan; Wang, Bobo; Liu, Bin; Chen, Famin; Jin, Guangri; Lu, Yanwu

    2014-10-20

    The mobilities of single-layer graphene combined with AlGaN/GaN heterostructures on two-dimensional electron gases in graphene/AlGaN/GaN double heterojunction are calculated. The impact of electron density in single-layer graphene is also studied. Remote surface roughness (RSR) and remote interfacial charge (RIC) scatterings are introduced into this heterostructure. The mobilities limited by RSR and RIC are an order of magnitude higher than that of interface roughness and misfit dislocation. This study contributes to designing structures for generation of higher electron mobility in graphene/AlGaN/GaN double heterojunction.

  7. Band Structure of Strain-Balanced GaAsBi/GaAsN Super-lattices on GaAs

    SciTech Connect (OSTI)

    Hwang, J.; Phillips, J. D.

    2011-05-31

    GaAs alloys with dilute content of Bi and N provide a large reduction in band-gap energy with increasing alloy composition. GaAsBi/GaAsN heterojunctions have a type-II band alignment, where superlattices based on these materials offer a wide range for designing effective band-gap energy by varying superlattice period and alloy composition. The miniband structure and effective band gap for strain-balanced GaAsBi/GaAsN superlattices with effective lattice match to GaAs are calculated for alloy compositions up to 5% Bi and N using the kp method. The effective band gap for these superlattices is found to vary between 0.89 and 1.32 eV for period thickness ranging from 10 to 100 . The joint density of states and optical absorption of a 40/40 GaAs0.96Bi0.04/GaAs0.98N0.02 superlattice are reported demonstrating a ground-state transition at 1.005 eV and first excited transition at 1.074 eV. The joint density of states is similar in magnitude to GaAs, while the optical absorption is approximately one order of magnitude lower due to the spatially indirect optical transition in the type-II structure. The GaAsBi/GaAsN system may provide a new material system with lattice match to GaAs in a spectral range of high importance for optoelectronic devices including solar cells, photodetectors, and light emitters.

  8. NBP RFI: Communications Requirements- Comments of Lake Region Electric

    Energy Savers [EERE]

    Cooperative- Minnesota | Department of Energy Lake Region Electric Cooperative- Minnesota NBP RFI: Communications Requirements- Comments of Lake Region Electric Cooperative- Minnesota Comments of Lake Region Electric Cooperative- Minnesota on Implementing the National Broadband Plan by Studying the Communications Requirements of Electric Utilities to Inform Federal Smart Grid Policy PDF icon NBP RFI: Communications Requirements- Comments of Lake Region Electric Cooperative- Minnesota More

  9. US SoAtl GA Site Consumption

    U.S. Energy Information Administration (EIA) Indexed Site

    GA Site Consumption million Btu $0 $500 $1,000 $1,500 $2,000 $2,500 US SoAtl GA Expenditures dollars ALL ENERGY average per household (excl. transportation) 0 4,000 8,000 12,000 16,000 US SoAtl GA Site Consumption kilowatthours $0 $300 $600 $900 $1,200 $1,500 $1,800 US SoAtl GA Expenditures dollars ELECTRICITY ONLY average per household * Site energy consumption (89.5 million Btu) and energy expenditures per household ($2,067) in Georgia are similar to the U.S. household averages. * Per

  10. AlGaAsSb/GaSb Distributed Bragg Reflectors Grown by Organometallic Vapor Phase Epitaxy

    SciTech Connect (OSTI)

    C.A. Wang; C.J. Vineis; D.R. Calawa

    2002-02-13

    The first AlGaAsSb/GaSb quarter-wave distributed Bragg reflectors grown by metallic vapor phase epitaxy are reported. The peak reflectance is 96% for a 10-period structure.

  11. Degradation mechanisms of 2 MeV proton irradiated AlGaN/GaN HEMTs...

    Office of Scientific and Technical Information (OSTI)

    irradiated AlGaNGaN HEMTs This content will become publicly available on August 26, 2016 Title: Degradation mechanisms of 2 MeV proton irradiated AlGaNGaN HEMTs Authors: ...

  12. Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN

    Office of Scientific and Technical Information (OSTI)

    HEMTs. (Conference) | SciTech Connect Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN HEMTs. Citation Details In-Document Search Title: Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN HEMTs. Abstract not provided. Authors: Biedermann, Laura Butler ; Kaplar, Robert James ; Marinella, Matthew ; Zavadil, Kevin Robert ; Atcitty, Stanley ; Sun, Min ; Palacios, Tomas Publication Date: 2012-10-01 OSTI Identifier: 1111316 Report Number(s):

  13. Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN

    Office of Scientific and Technical Information (OSTI)

    HEMTs. (Conference) | SciTech Connect Conference: Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN HEMTs. Citation Details In-Document Search Title: Influence of Barrier Design on Current Collapse in High Voltage AlGaN/GaN HEMTs. Abstract not provided. Authors: DasGupta, Sandeepan ; Biedermann, Laura Butler ; Kaplar, Robert ; Marinella, Matthew ; Zavadil, Kevin Robert ; Atcitty, Stanley ; Sun, Min ; Palacios, Tomas Publication Date: 2013-02-01 OSTI Identifier:

  14. GaInP/GaAs/GaInAs Monolithic Tandem Cells for High-Performance Solar Concentrators

    SciTech Connect (OSTI)

    Wanlass, M. W.; Ahrenkiel, S. P.; Albin, D. S.; Carapella, J. J.; Duda, A.; Emery, K.; Geisz, J. F.; Jones, K.; Kurtz, S.; Moriarty, T.; Romero, M. J.

    2005-08-01

    We present a new approach for ultra-high-performance tandem solar cells that involves inverted epitaxial growth and ultra-thin device processing. The additional degree of freedom afforded by the inverted design allows the monolithic integration of high-, and medium-bandgap, lattice-matched (LM) subcell materials with lower-bandgap, lattice-mismatched (LMM) materials in a tandem structure through the use of transparent compositionally graded layers. The current work concerns an inverted, series-connected, triple-bandgap, GaInP (LM, 1.87 eV)/GaAs (LM, 1.42 eV)/GaInAs (LMM, {approx}1 eV) device structure grown on a GaAs substrate. Ultra-thin tandem devices are fabricated by mounting the epiwafers to pre-metallized Si wafer handles and selectively removing the parent GaAs substrate. The resulting handle-mounted, ultra-thin tandem cells have a number of important advantages, including improved performance and potential reclamation/reuse of the parent substrate for epitaxial growth. Additionally, realistic performance modeling calculations suggest that terrestrial concentrator efficiencies in the range of 40-45% are possible with this new tandem cell approach. A laboratory-scale (0.24 cm2), prototype GaInP/GaAs/GaInAs tandem cell with a terrestrial concentrator efficiency of 37.9% at a low concentration ratio (10.1 suns) is described, which surpasses the previous world efficiency record of 37.3%.

  15. Klamath and Lake Counties Agricultural Industrial Park

    Broader source: Energy.gov [DOE]

    Engineered Geothermal Systems, Low Temp, Exploration Demonstration Projects. Project goal: to attract new businesses to Klamath and Lake counties for the purpose of capitalizing on our abundant geothermal resources.

  16. National Science Foundation, Lake Hoare, Antarctica

    Broader source: Energy.gov [DOE]

    Lake Hoare is a scientific research site located in Antarctica. Research at this large field site is conducted all summer and requires an energy source that does not cause pollution or engine noise.

  17. Lake Mills Light & Water | Open Energy Information

    Open Energy Info (EERE)

    Light & Water Jump to: navigation, search Name: Lake Mills Light & Water Place: Wisconsin Phone Number: (920) 648-4026 Website: www.lakemillslw.com Outage Hotline: (920) 648-4026...

  18. Clear Lake Cogeneration LP | Open Energy Information

    Open Energy Info (EERE)

    Cogeneration LP Jump to: navigation, search Name: Clear Lake Cogeneration LP Place: Idaho Phone Number: 281-474-7611 Outage Hotline: 281-474-7611 References: EIA Form EIA-861 Final...

  19. Salt Lake City- High Performance Buildings Requirement

    Broader source: Energy.gov [DOE]

    Salt Lake City's mayor issued an executive order in July 2005 requiring that all public buildings owned and controlled by the city be built or renovated to meet the requirements of LEED "silver"...

  20. Metal-interconnection-free integration of InGaN/GaN light emitting diodes with AlGaN/GaN high electron mobility transistors

    SciTech Connect (OSTI)

    Liu, Chao; Cai, Yuefei; Liu, Zhaojun; Ma, Jun; Lau, Kei May

    2015-05-04

    We report a metal-interconnection-free integration scheme for InGaN/GaN light emitting diodes (LEDs) and AlGaN/GaN high electron mobility transistors (HEMTs) by combining selective epi removal (SER) and selective epitaxial growth (SEG) techniques. SER of HEMT epi was carried out first to expose the bottom unintentionally doped GaN buffer and the sidewall GaN channel. A LED structure was regrown in the SER region with the bottom n-type GaN layer (n-electrode of the LED) connected to the HEMTs laterally, enabling monolithic integration of the HEMTs and LEDs (HEMT-LED) without metal-interconnection. In addition to saving substrate real estate, minimal interface resistance between the regrown n-type GaN and the HEMT channel is a significant improvement over metal-interconnection. Furthermore, excellent off-state leakage characteristics of the driving transistor can also be guaranteed in such an integration scheme.

  1. A hole modulator for InGaN/GaN light-emitting diodes

    SciTech Connect (OSTI)

    Zhang, Zi-Hui; Kyaw, Zabu; Liu, Wei; Ji, Yun; Wang, Liancheng; Tan, Swee Tiam; Sun, Xiao Wei E-mail: VOLKAN@stanfordalumni.org; Demir, Hilmi Volkan E-mail: VOLKAN@stanfordalumni.org

    2015-02-09

    The low p-type doping efficiency of the p-GaN layer has severely limited the performance of InGaN/GaN light-emitting diodes (LEDs) due to the ineffective hole injection into the InGaN/GaN multiple quantum well (MQW) active region. The essence of improving the hole injection efficiency is to increase the hole concentration in the p-GaN layer. Therefore, in this work, we have proposed a hole modulator and studied it both theoretically and experimentally. In the hole modulator, the holes in a remote p-type doped layer are depleted by the built-in electric field and stored in the p-GaN layer. By this means, the overall hole concentration in the p-GaN layer can be enhanced. Furthermore, the hole modulator is adopted in the InGaN/GaN LEDs, which reduces the effective valance band barrier height for the p-type electron blocking layer from ?332?meV to ?294?meV at 80?A/cm{sup 2} and demonstrates an improved optical performance, thanks to the increased hole concentration in the p-GaN layer and thus the improved hole injection into the MQWs.

  2. AlGaN/GaN heterostructure prepared on a Si (110) substrate via pulsed sputtering

    SciTech Connect (OSTI)

    Watanabe, T.; Ohta, J.; Kondo, T.; Ohashi, M.; Ueno, K.; Kobayashi, A.; Fujioka, H.

    2014-05-05

    GaN films were grown on Si (110) substrates using a low-temperature growth technique based on pulsed sputtering. Reduction of the growth temperature suppressed the strain in the GaN films, leading to an increase in the critical thickness for crack formation. In addition, an AlGaN/GaN heterostructure with a flat heterointerface was prepared using this technique. Furthermore, the existence of a two dimensional electron gas at the heterointerface with a mobility of 1360 cm{sup 2}/Vs and a sheet carrier density of 1.3??10{sup 13}?cm{sup ?2} was confirmed. Finally, the use of the AlGaN/GaN heterostructure in a high electron mobility transistor was demonstrated. These results indicate that low-temperature growth via pulsed sputtering is quite promising for the fabrication of GaN-based electronic devices.

  3. Lake Granbury and Lake Whitney Assessment Initiative Final Scientific/Technical Report Summary

    SciTech Connect (OSTI)

    Harris, B.L.; Roelke, Daniel; Brooks, Bryan; Grover, James

    2010-10-11

    A team of Texas AgriLife Research, Baylor University and University of Texas at Arlington researchers studied the biology and ecology of Prymnesium parvum (golden algae) in Texas lakes using a three-fold approach that involved system-wide monitoring, experimentation at the microcosm and mesocosm scales, and mathematical modeling. The following are conclusions, to date, regarding this organism??s ecology and potential strategies for mitigation of blooms by this organism. In-lake monitoring revealed that golden algae are present throughout the year, even in lakes where blooms do not occur. Compilation of our field monitoring data with data collected by Texas Parks and Wildlife and Brazos River Authority (a period spanning a decade) revealed that inflow and salinity variables affect bloom formations. Thresholds for algae populations vary per lake, likely due to adaptations to local conditions, and also to variations in lake-basin morphometry, especially the presence of coves that may serve as hydraulic storage zones for P. parvum populations. More specifically, our in-lake monitoring showed that the highly toxic bloom that occurred in Lake Granbury in the winter of 2006/2007 was eliminated by increased river inflow events. The bloom was flushed from the system. The lower salinities that resulted contributed to golden algae not blooming in the following years. However, flushing is not an absolute requirement for bloom termination. Laboratory experiments have shown that growth of golden algae can occur at salinities ~1-2 psu but only when temperatures are also low. This helps to explain why blooms are possible during winter months in Texas lakes. Our in-lake experiments in Lake Whitney and Lake Waco, as well as our laboratory experiments, revealed that cyanobacteria, or some other bacteria capable of producing algicides, were able to prevent golden algae from blooming. Identification of this organism is a high priority as it may be a key to managing golden algae blooms. Our numerical modeling results support the idea that cyanobacteria, through allelopathy, control the timing of golden algae blooms in Lake Granbury. The in-lake experiments in Lake Whitney and Lake Waco also revealed that as golden algae blooms develop, there are natural enemies (a species of rotifer, and a virus) that help slow the population growth. Again, better characterization of these organisms is a high priority as it may be key to managing golden algae blooms. Our laboratory and in-lake experiments and field monitoring have shown that nutrient additions will remove toxicity and prevent golden algae from blooming. In fact, other algae displace the golden algae after nutrient additions. Additions of ammonia are particularly effective, even at low doses (much lower than what is employed in fish hatchery ponds). Application of ammonia in limited areas of lakes, such as in coves, should be explored as a management option. The laboratory experiments and field monitoring also show that the potency of toxins produced by P. parvum is greatly reduced when water pH is lower, closer to neutral levels. Application of mild acid to limited areas of lakes (but not to a level where acidic conditions are created), such as in coves, should be explored as a management option. Finally, our field monitoring and mathematical modeling revealed that flushing/dilution at high enough levels could prevent P. parvum from forming blooms and/or terminate existing blooms. This technique could work using deeper waters within a lake to flush the surface waters of limited areas of the same lakes, such as in coves and should be explored as a management option. In this way, water releases from upstream reservoirs would not be necessary and there would be no addition of nutrients in the lake.

  4. EIS-0476: Vogtle Electric Generating Plant in Burke County, GA...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6: Vogtle Electric Generating Plant in Burke County, GA EIS-0476: Vogtle Electric Generating Plant in Burke County, GA February 8, 2012 EIS-0476: Final Environmental Impact ...

  5. Energy and water in the Great Lakes.

    SciTech Connect (OSTI)

    Tidwell, Vincent Carroll

    2011-11-01

    The nexus between thermoelectric power production and water use is not uniform across the U.S., but rather differs according to regional physiography, demography, power plant fleet composition, and the transmission network. That is, in some regions water demand for thermoelectric production is relatively small while in other regions it represents the dominate use. The later is the case for the Great Lakes region, which has important implications for the water resources and aquatic ecology of the Great Lakes watershed. This is today, but what about the future? Projected demographic trends, shifting lifestyles, and economic growth coupled with the threat of global climate change and mounting pressure for greater U.S. energy security could have profound effects on the region's energy future. Planning for such an uncertain future is further complicated by the fact that energy and environmental planning and regulatory decisionmaking is largely bifurcated in the region, with environmental and water resource concerns generally taken into account after new energy facilities and technologies have been proposed, or practices are already in place. Based on these confounding needs, the objective of this effort is to develop Great Lakes-specific methods and tools to integrate energy and water resource planning and thereby support the dual goals of smarter energy planning and development, and protection of Great Lakes water resources. Guiding policies for this planning are the Great Lakes and St. Lawrence River Basin Water Resources Compact and the Great Lakes Water Quality Agreement. The desired outcome of integrated energy-water-aquatic resource planning is a more sustainable regional energy mix for the Great Lakes basin ecosystem.

  6. Oxidation of ultrathin GaSe

    SciTech Connect (OSTI)

    Thomas Edwin Beechem; McDonald, Anthony E.; Ohta, Taisuke; Howell, Stephen W.; Kalugin, Nikolai G.; Kowalski, Brian M.; Brumbach, Michael T.; Spataru, Catalin D.; Pask, Jesse A.

    2015-10-26

    Oxidation of exfoliated gallium selenide (GaSe) is investigated through Raman, photoluminescence, Auger, and X-ray photoelectron spectroscopies. Photoluminescence and Raman intensity reductions associated with spectral features of GaSe are shown to coincide with the emergence of signatures emanating from the by-products of the oxidation reaction, namely, Ga2Se3 and amorphous Se. Furthermore, photoinduced oxidation is initiated over a portion of a flake highlighting the potential for laser based patterning of two-dimensional heterostructures via selective oxidation.

  7. Oxidation of ultrathin GaSe

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Thomas Edwin Beechem; McDonald, Anthony E.; Ohta, Taisuke; Howell, Stephen W.; Kalugin, Nikolai G.; Kowalski, Brian M.; Brumbach, Michael T.; Spataru, Catalin D.; Pask, Jesse A.

    2015-10-26

    Oxidation of exfoliated gallium selenide (GaSe) is investigated through Raman, photoluminescence, Auger, and X-ray photoelectron spectroscopies. Photoluminescence and Raman intensity reductions associated with spectral features of GaSe are shown to coincide with the emergence of signatures emanating from the by-products of the oxidation reaction, namely, Ga2Se3 and amorphous Se. Furthermore, photoinduced oxidation is initiated over a portion of a flake highlighting the potential for laser based patterning of two-dimensional heterostructures via selective oxidation.

  8. Highly uniform, multi-stacked InGaAs/GaAs quantum dots embedded in a GaAs nanowire

    SciTech Connect (OSTI)

    Tatebayashi, J. Ota, Y.; Ishida, S.; Nishioka, M.; Iwamoto, S.; Arakawa, Y.

    2014-09-08

    We demonstrate a highly uniform, dense stack of In{sub 0.22}Ga{sub 0.78}As/GaAs quantum dot (QD) structures in a single GaAs nanowire (NW). The size (and hence emission energy) of individual QD is tuned by careful control of the growth conditions based on a diffusion model of morphological evolution of NWs and optical characterization. By carefully tailoring the emission energies of individual QD, dot-to-dot inhomogeneous broadening of QD stacks in a single NW can be as narrow as 9.3?meV. This method provides huge advantages over traditional QD stack using a strain-induced Stranski-Krastanow growth scheme. We show that it is possible to fabricate up to 200 uniform QDs in single GaAs NWs using this growth technique without degradation of the photoluminescence intensity.

  9. THERMODYNAMICS OF PARTIALLY FROZEN COOLING LAKES

    SciTech Connect (OSTI)

    Garrett, A.; Casterline, M.; Salvaggio, C.

    2010-01-05

    The Rochester Institute of Technology (RIT) collected visible, SWIR, MWIR and LWIR imagery of the Midland (Michigan) Cogeneration Ventures Plant from aircraft during the winter of 2008-2009. RIT also made ground-based measurements of lake water and ice temperatures, ice thickness and atmospheric variables. The Savannah River National Laboratory (SRNL) used the data collected by RIT and a 3-D hydrodynamic code to simulate the Midland cooling lake. The hydrodynamic code was able to reproduce the time distribution of ice coverage on the lake during the entire winter. The simulations and data show that the amount of ice coverage is almost linearly proportional to the rate at which heat is injected into the lake (Q). Very rapid melting of ice occurs when strong winds accelerate the movement of warm water underneath the ice. A snow layer on top of the ice acts as an insulator and decreases the rate of heat loss from the water below the ice to the atmosphere above. The simulated ice cover on the lake was not highly sensitive to the thickness of the snow layer. The simplicity of the relationship between ice cover and Q and the weak responses of ice cover to snow depth over the ice are probably attributable to the negative feedback loop that exists between ice cover and heat loss to the atmosphere.

  10. Soda Lake, Nevada: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    This article is a stub. You can help OpenEI by expanding it. Soda Lake is a lake in Churchill County, Nevada. References USGS GNIS Retrieved from "http:en.openei.orgw...

  11. Lake Benton II Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    II Wind Farm Jump to: navigation, search Name Lake Benton II Wind Farm Facility Lake Benton II Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service...

  12. Meadow Lake II (3Q10) | Open Energy Information

    Open Energy Info (EERE)

    II (3Q10) Jump to: navigation, search Name Meadow Lake II (3Q10) Facility Meadow Lake II (3Q10) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service...

  13. Dry Lake II Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    II Wind Farm Jump to: navigation, search Name Dry Lake II Wind Farm Facility Dry Lake II Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner...

  14. City of Lake Crystal, Minnesota (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Name: City of Lake Crystal Place: Minnesota Phone Number: (605)256-6536 Website: www.ci.lake-crystal.mn.usinde Outage Hotline: (800)520-4746 References: EIA Form EIA-861 Final...

  15. City of Shasta Lake, California (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Name: City of Shasta Lake Place: California Phone Number: 530-275-7400 Website: www.ci.shasta-lake.ca.usindex Outage Hotline: 530-275-7400 References: EIA Form EIA-861 Final...

  16. Cooperative L&P Assn Lake Cnty | Open Energy Information

    Open Energy Info (EERE)

    Cooperative L&P Assn Lake Cnty Jump to: navigation, search Name: Cooperative L&P Assn Lake Cnty Place: Minnesota Phone Number: 800-580-5881 Website: www.clpower.com Facebook:...

  17. City of Wall Lake, Iowa (Utility Company) | Open Energy Information

    Open Energy Info (EERE)

    City of Wall Lake, Iowa (Utility Company) Jump to: navigation, search Name: City of Wall Lake Place: Iowa Phone Number: (712) 664-2216 Website: walllake.com?pageid40 Outage...

  18. Red Lake Electric Coop, Inc | Open Energy Information

    Open Energy Info (EERE)

    Red Lake Electric Coop, Inc Jump to: navigation, search Name: Red Lake Electric Coop, Inc Place: Minnesota Phone Number: 218-253-2168 or 800-245-6068 Website: www.redlakeelectric.c...

  19. JW Great Lakes Wind LLC | Open Energy Information

    Open Energy Info (EERE)

    JW Great Lakes Wind LLC Jump to: navigation, search Name: JW Great Lakes Wind LLC Place: Cleveland, Ohio Zip: 44114-4420 Sector: Wind energy Product: Ohio based subsidiary of Juwi...

  20. Montana Joint Application for Proposed Work in Streams, Lakes...

    Open Energy Info (EERE)

    Streams, Lakes and Wetlands Webpage Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Montana Joint Application for Proposed Work in Streams, Lakes and...

  1. Synthesis, morphology and optical properties of GaN and AlGaN semiconductor nanostructures

    SciTech Connect (OSTI)

    Kuppulingam, B. Singh, Shubra Baskar, K.

    2014-04-24

    Hexagonal Gallium Nitride (GaN) and Aluminum Gallium Nitride (AlGaN) nanoparticles were synthesized by sol-gel method using Ethylene Diamine Tetra Acetic acid (EDTA) complex route. Powder X-ray diffraction (PXRD) analysis confirms the hexagonal wurtzite structure of GaN and Al{sub 0.25}Ga{sub 0.75}N nanoparticles. Surface morphology and elemental analysis were carried out by Scanning Electron Microscope (SEM) and Energy Dispersive X-ray spectroscopy (EDX). The room temperature Photoluminescence (PL) study shows the near band edge emission for GaN at 3.35 eV and at 3.59 eV for AlGaN nanoparticles. The Aluminum (Al) composition of 20% has been obtained from PL emission around 345 nm.

  2. High-performance InGaP/GaAs pnp {delta}-doped heterojunction bipolar transistor

    SciTech Connect (OSTI)

    Tsai, J.-H. Chiu, S.-Y.; Lour, W.-S.; Guo, D.-F.

    2009-07-15

    In this article, a novel InGaP/GaAs pnp {delta}-doped heterojunction bipolar transistor is first demonstrated. Though the valence band discontinuity at InGaP/GaAs heterojunction is relatively large, the addition of a {delta}-doped sheet between two spacer layers at the emitter-base (E-B) junction effectively eliminates the potential spike and increases the confined barrier for electrons, simultaneously. Experimentally, a high current gain of 25 and a relatively low E-B offset voltage of 60 mV are achieved. The offset voltage is much smaller than the conventional InGaP/GaAs pnp HBT. The proposed device could be used for linear amplifiers and low-power complementary integrated circuit applications.

  3. Lake Roosevelt Fisheries Evaluation Program; Meadow Creek vs. Lake Whatcom Stock Kokanee Salmon Investigations in Lake Roosevelt, 2001 Annual Report.

    SciTech Connect (OSTI)

    McLellan, Holly; Scholz, Allan

    2002-03-01

    Lake Roosevelt has been stocked with Lake Whatcom stock kokanee since 1989 with the primary objective of creating a self-sustaining recreational fishery. Due to low return numbers, it was hypothesized a stock of kokanee, native to the upper Columbia River, might perform better than the coastal Lake Whatcom strain. Kokanee from Meadow Creek, a tributary of Kootenay Lake, British Columbia were selected as an alternative stock. Matched pair releases of Lake Whatcom and Meadow Creek kokanee were made from Sherman Creek Hatchery in late June 2000 and repeated in 2001. Stock performance between Lake Whatcom and Meadow Creek kokanee was evaluated using three performance measures; (1) the number of returns to Sherman Creek, the primary egg collection facility, (2) the number of returns to other tributaries and (3) the number of returns to the creel. Kokanee were collected during five passes through the reservoir via electrofishing, which included 87 tributary mouths during the fall of 2000 and 2001. Chi-square analysis indicated age two Meadow Creek kokanee returned to Sherman Creek in significantly higher numbers when compared to the Whatcom stock in 2000 ({chi}{sup 2} = 736.6; d.f. = 1; P < 0.01) and 2001 ({chi}{sup 2} = 156.2; d.f. = 1; P < 0.01). Reservoir wide recoveries of age two kokanee had similar results in 2000 ({chi}{sup 2} = 735.3; d.f. = 1; P < 0.01) and 2001 ({chi}{sup 2} = 150.1; d.f. = 1; P < 0.01). Six Lake Whatcom and seven Meadow Creek three year olds were collected in 2001. The sample size of three year olds was too small for statistical analysis. No kokanee were collected during creel surveys in 2000, and two (age three kokanee) were collected in 2001. Neither of the hatchery kokanee collected were coded wire tagged, therefore stock could not be distinguished. After two years of monitoring, neither Meadow Creek or Lake Whatcom kokanee appear to be capable of providing a run of three-year-old spawners to sustain stocking efforts. The small number of hatchery three-year-olds collected indicated that the current stocking methods will continue to produce a limited jacking run largely composed of precocious males and a small number of three-year-olds. However, supplemental creel data indicated anglers harvested two-year-old hatchery kokanee 30-45 days after release. Supplemental creel data should continue to be collected to accurately evaluate hatchery contributions to the creel.

  4. Lake Roosevelt Fisheries Evaluation Program; Meadow Creek vs. Lake Whatcom Stock Kokanee Salmon Investigations in Lake Roosevelt, Annual Report 2002.

    SciTech Connect (OSTI)

    McLellan, Holly

    2003-03-01

    Lake Whatcom, Washington kokanee have been stocked in Lake Roosevelt since 1987 with the primary objective of creating a self-sustaining fishery. Success has been limited by low recruitment to the fishery, low adult returns to hatcheries, and a skewed sex ratio. It was hypothesized that a stock native to the upper Columbia River might perform better than the coastal Lake Whatcom stock. Kokanee from Meadow Creek, a tributary of Kootenay Lake, British Columbia were selected as an alternative stock. Post smolts from each stock were released from Sherman Creek Hatchery in late June 2000 and repeated in 2001. Stock performance was evaluated using three measures; (1) number of returns to Sherman Creek, the primary egg collection facility, (2) the number of returns to 86 tributaries sampled and, (3) the number of returns to the creel. In two repeated experiments, neither Meadow Creek or Lake Whatcom kokanee appeared to be capable of providing a run of three-year old spawners to sustain stocking efforts. Less than 10 three-years olds from either stock were collected during the study period. Chi-square analysis indicated age two Meadow Creek kokanee returned to Sherman Creek and to other tributaries in significantly higher numbers when compared to the Lake Whatcom stock in both 2000 and 2001. However, preliminary data from the Spokane Tribe of Indians indicated that a large number of both stocks were precocial before they were stocked. The small number of hatchery three-year olds collected indicated that the current hatchery rearing and stocking methods will continue to produce a limited jacking run largely composed of precocious males and a small number of three-year olds. No kokanee from the study were collected during standard lake wide creel surveys. Supplemental creel data, including fishing derbies, test fisheries, and angler diaries, indicated anglers harvested two-year-old hatchery kokanee a month after release. The majority of the two-year old kokanee harvested were from a direct stock at the Fort Spokane boat launch. Only Lake Whatcom kokanee were stocked from the boat launch, therefore stock performance was not evaluated, however the high success of the stocking location will likely increase harvest of hatchery kokanee in the future. Despite low numbers of the targeted three-year olds, Meadow Creek kokanee should be stocked when possible to promote fish native to the upper Columbia River.

  5. Princeton Plasma Physics Lab - General Atomics (GA)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    general-atomics-ga General Atomics en The Scorpion's Strategy: "Catch and Subdue" http:www.pppl.govnode1132

  6. Simplified 2DEG carrier concentration model for composite barrier AlGaN/GaN HEMT

    SciTech Connect (OSTI)

    Das, Palash Biswas, Dhrubes

    2014-04-24

    The self consistent solution of Schrodinger and Poisson equations is used along with the total charge depletion model and applied with a novel approach of composite AlGaN barrier based HEMT heterostructure. The solution leaded to a completely new analytical model for Fermi energy level vs. 2DEG carrier concentration. This was eventually used to demonstrate a new analytical model for the temperature dependent 2DEG carrier concentration in AlGaN/GaN HEMT.

  7. Geothermal Literature Review At Medicine Lake Geothermal Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Medicine Lake Geothermal Area (1984) Exploration Activity Details Location...

  8. Leading the Charge: Jana Ganion Advances Blue Lake Rancheria's Climate

    Energy Savers [EERE]

    Action Agenda | Department of Energy Jana Ganion Advances Blue Lake Rancheria's Climate Action Agenda Leading the Charge: Jana Ganion Advances Blue Lake Rancheria's Climate Action Agenda February 27, 2015 - 10:38am Addthis Jana Ganion is the Energy Director for the Blue Lake Rancheria. Jana Ganion is the Energy Director for the Blue Lake Rancheria. Change doesn't happen on its own. It's led by dedicated and passionate people who are committed to empowering Indian Country to energize future

  9. Workplace Charging Challenge Partner: College of Lake County | Department

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Energy College of Lake County Workplace Charging Challenge Partner: College of Lake County Workplace Charging Challenge Partner: College of Lake County Joined the Challenge: June 2014 Headquarters: Grayslake, IL Charging Location: Grayslake, IL Domestic Employees: 1,177 The College of Lake County is committed to sustainability and strives to both reduce its carbon emissions and provide learning opportunities for students and members of the community. Plug-in electric vehicle (PEV)

  10. PROJECT PROFILE: Salt Lake City Corporation (Solar Market Pathways) |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Salt Lake City Corporation (Solar Market Pathways) PROJECT PROFILE: Salt Lake City Corporation (Solar Market Pathways) Title: Wasatch Solar Project WASATCH solar logo.png Funding Opportunity: Solar Market Pathways SunShot Subprogram: Soft Costs Location: Salt Lake City, UT Amount Awarded: $600,000 Awardee Cost Share: $164,645 Salt Lake City and its partners are developing a comprehensive long-term solar deployment strategy, which includes an analysis of the value of

  11. Great Lakes Water Scarcity and Regional Economic Development

    ScienceCinema (OSTI)

    Cameron Davis; Tim Eder; David Ulrich; David Naftzger; Donald J. Wuebbles; Mark C. Petri

    2013-06-06

    Great Lakes Water Scarcity and Regional Economic Development panel at Northwestern University on 10/10/2012

  12. Great Lakes Water Scarcity and Regional Economic Development

    SciTech Connect (OSTI)

    Cameron Davis; Tim Eder; David Ulrich; David Naftzger; Donald J. Wuebbles; Mark C. Petri

    2012-10-10

    Great Lakes Water Scarcity and Regional Economic Development panel at Northwestern University on 10/10/2012

  13. GaTe semiconductor for radiation detection

    DOE Patents [OSTI]

    Payne, Stephen A.; Burger, Arnold; Mandal, Krishna C.

    2009-06-23

    GaTe semiconductor is used as a room-temperature radiation detector. GaTe has useful properties for radiation detectors: ideal bandgap, favorable mobilities, low melting point (no evaporation), non-hygroscopic nature, and availability of high-purity starting materials. The detector can be used, e.g., for detection of illicit nuclear weapons and radiological dispersed devices at ports of entry, in cities, and off shore and for determination of medical isotopes present in a patient.

  14. Development and Industrialization of InGaN/GaN LEDs on Patterned...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PDF icon 2015 BTO Peer Review Presentation - Development and Industrialization of InGaNGaN LEDs on Patterned Sapphire Substrates for Low Cost Emitter Architecture More Documents & ...

  15. Accelerated aging of GaAs concentrator solar cells

    SciTech Connect (OSTI)

    Gregory, P.E.

    1982-04-01

    An accelerated aging study of AlGaAs/GaAs solar cells has been completed. The purpose of the study was to identify the possible degradation mechanisms of AlGaAs/GaAs solar cells in terrestrial applications. Thermal storage tests and accelerated AlGaAs corrosion studies were performed to provide an experimental basis for a statistical analysis of the estimated lifetime. Results of this study suggest that a properly designed and fabricated AlGaAs/GaAs solar cell can be mechanically rugged and environmentally stable with projected lifetimes exceeding 100 years.

  16. EIS-0491: Draft Environmental Impact Statement | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Draft Environmental Impact Statement EIS-0491: Draft Environmental Impact Statement Lake Charles Liquefaction Project, Calcasieu Parish, Louisiana Federal Energy Regulatory ...

  17. InGaN/GaN tunnel junctions for hole injection in GaN light emitting diodes

    SciTech Connect (OSTI)

    Krishnamoorthy, Sriram E-mail: rajan@ece.osu.edu; Akyol, Fatih; Rajan, Siddharth E-mail: rajan@ece.osu.edu

    2014-10-06

    InGaN/GaN tunnel junction contacts were grown using plasma assisted molecular beam epitaxy (MBE) on top of a metal-organic chemical vapor deposition (MOCVD)-grown InGaN/GaN blue (450?nm) light emitting diode. A voltage drop of 5.3?V at 100?mA, forward resistance of 2 10{sup ?2} ? cm{sup 2}, and a higher light output power compared to the reference light emitting diodes (LED) with semi-transparent p-contacts were measured in the tunnel junction LED (TJLED). A forward resistance of 5??10{sup ?4} ? cm{sup 2} was measured in a GaN PN junction with the identical tunnel junction contact as the TJLED, grown completely by MBE. The depletion region due to the impurities at the regrowth interface between the MBE tunnel junction and the MOCVD-grown LED was hence found to limit the forward resistance measured in the TJLED.

  18. Glen Canyon National Recreation Area, Lake Powell, Utah | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Glen Canyon National Recreation Area, Lake Powell, Utah Glen Canyon National Recreation Area, Lake Powell, Utah Photo of the Photovoltaic System at Lake Powell, Utah Lake Powell is part of Utah's Glen Canyon National Recreation Area. The Dangling Rope Marina used diesel generators to supply power. They used 65,000 gallons of diesel fuel per year that had to be barged in over Lake Powell. The potential for environmental damage to the marina in the event of a fuel spill was significant,

  19. GaP ring-like nanostructures on GaAs (100) with In{sub 0.15}Ga{sub 0.85}As compensation layers

    SciTech Connect (OSTI)

    Prongjit, Patchareewan Pankaow, Naraporn Boonpeng, Poonyasiri Thainoi, Supachok Panyakeow, Somsak Ratanathammaphan, Somchai

    2013-12-04

    We present the fabrication of GaP ring-like nanostructures on GaAs (100) substrates with inserted In{sub 0.15}Ga{sub 0.85}As compensation layers. The samples are grown by droplet epitaxy using solid-source molecular beam epitaxy. The dependency of nanostructural and optical properties of GaP nanostructures on In{sub 0.15}Ga{sub 0.85}As layer thickness is investigated by ex-situ atomic force microscope (AFM) and photoluminescence (PL). It is found that the characteristics of GaP ring-like structures on GaAs strongly depend on the In{sub 0.15}Ga{sub 0.85}As layer thickness.

  20. Green cubic GaInN/GaN light-emitting diode on microstructured silicon (100)

    SciTech Connect (OSTI)

    Stark, Christoph J. M.; Detchprohm, Theeradetch; Wetzel, Christian, E-mail: wetzel@ieee.org [Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States) [Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); Future Chips Constellation, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180 (United States); Lee, S. C.; Brueck, S. R. J. [Department of Electrical and Computer Engineering and Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico 87106 (United States)] [Department of Electrical and Computer Engineering and Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico 87106 (United States); Jiang, Y.-B. [Department of Earth and Planetary Science, University of New Mexico, Albuquerque, New Mexico 87131 (United States)] [Department of Earth and Planetary Science, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

    2013-12-02

    GaInN/GaN light-emitting diodes free of piezoelectric polarization were prepared on standard electronic-grade Si(100) substrates. Micro-stripes of GaN and GaInN/GaN quantum wells in the cubic crystal structure were grown on intersecting (111) planes of microscale V-grooved Si in metal-organic vapor phase epitaxy, covering over 50% of the wafer surface area. Crystal phases were identified in electron back-scattering diffraction. A cross-sectional analysis reveals a cubic structure virtually free of line defects. Electroluminescence over 20 to 100??A is found fixed at 487?nm (peak), 516?nm (dominant). Such structures therefore should allow higher efficiency, wavelength-stable light emitters throughout the visible spectrum.

  1. Lattice-matched epitaxial GaInAsSb/GaSb thermophotovoltaic devices

    SciTech Connect (OSTI)

    Wang, C.A.; Choi, H.K.; Turner, G.W.; Spears, D.L.; Manfra, M.J.; Charache, G.W.

    1997-05-01

    The materials development of Ga{sub 1{minus}x}In{sub x}As{sub y}Sb{sub 1{minus}y} alloys for lattice-matched thermophotovoltaic (TPV) devices is reported. Epilayers with cutoff wavelength 2--2.4 {micro}m at room temperature and lattice-matched to GaSb substrates were grown by both low-pressure organometallic vapor phase epitaxy and molecular beam epitaxy. These layers exhibit high optical and structural quality. For demonstrating lattice-matched thermophotovoltaic devices, p- and n-type doping studies were performed. Several TPV device structures were investigated, with variations in the base/emitter thicknesses and the incorporation of a high bandgap GaSb or AlGaAsSb window layer. Significant improvement in the external quantum efficiency is observed for devices with an AlGaAsSb window layer compared to those without one.

  2. Lake Michigan Offshore Wind Feasibility Assessment

    SciTech Connect (OSTI)

    Boezaart, Arnold; Edmonson, James; Standridge, Charles; Pervez, Nahid; Desai, Neel; Williams, Bruce; Clark, Aaron; Zeitler, David; Kendall, Scott; Biddanda, Bopi; Steinman, Alan; Klatt, Brian; Gehring, J. L.; Walter, K.; Nordman, Erik E.

    2014-06-30

    The purpose of this project was to conduct the first comprehensive offshore wind assessment over Lake Michigan and to advance the body of knowledge needed to support future commercial wind energy development on the Great Lakes. The project involved evaluation and selection of emerging wind measurement technology and the permitting, installation and operation of the first mid-lake wind assessment meteorological (MET) facilities in Michigan’s Great Lakes. In addition, the project provided the first opportunity to deploy and field test floating LIDAR and Laser Wind Sensor (LWS) technology, and important research related equipment key to the sitting and permitting of future offshore wind energy development in accordance with public participation guidelines established by the Michigan Great Lakes Wind Council (GLOW). The project created opportunities for public dialogue and community education about offshore wind resource management and continued the dialogue to foster Great Lake wind resource utilization consistent with the focus of the GLOW Council. The technology proved to be effective, affordable, mobile, and the methods of data measurement accurate. The public benefited from a substantial increase in knowledge of the wind resources over Lake Michigan and gained insights about the potential environmental impacts of offshore wind turbine placements in the future. The unique first ever hub height wind resource assessment using LWS technology over water and development of related research data along with the permitting, sitting, and deployment of the WindSentinel MET buoy has captured public attention and has helped to increase awareness of the potential of future offshore wind energy development on the Great Lakes. Specifically, this project supported the acquisition and operation of a WindSentinel (WS) MET wind assessment buoy, and associated research for 549 days over multiple years at three locations on Lake Michigan. Four research objectives were defined for the project including to: 1) test and validate floating LIDAR technology; 2) collect and access offshore wind data; 3) detect and measure bird and bat activity over Lake Michigan; 4) conduct an over water sound propagation study; 5) prepare and offer a college course on offshore energy, and; 6) collect other environmental, bathometric, and atmospheric data. Desk-top research was performed to select anchorage sites and to secure permits to deploy the buoy. The project also collected and analyzed data essential to wind industry investment decision-making including: deploying highly mobile floating equipment to gather offshore wind data; correlating offshore wind data with conventional on-shore MET tower data; and performing studies that can contribute to the advancement and deployment of offshore wind technologies. Related activities included: • Siting, permitting, and deploying an offshore floating MET facility; • Validating the accuracy of floating LWS using near shoreline cup anemometer MET instruments; • Assessment of laser pulse technology (LIDAR) capability to establish hub height measurement of wind conditions at multiple locations on Lake Michigan; • Utilizing an extended-season (9-10 month) strategy to collect hub height wind data and weather conditions on Lake Michigan; • Investigation of technology best suited for wireless data transmission from distant offshore structures; • Conducting field-validated sound propagation study for a hypothetical offshore wind farm from shoreline locations; • Identifying the presence or absence of bird and bat species near wind assessment facilities; • Identifying the presence or absence of benthic and pelagic species near wind assessment facilities; All proposed project activities were completed with the following major findings: • Floating Laser Wind Sensors are capable of high quality measurement and recordings of wind resources. The WindSentinel presented no significant operational or statistical limitations in recording wind data technology at a at a high confidence level as compared to traditional anemometer cup technology. • During storms, mean Turbulent Kinetic Energy (TKE) increases with height above water; • Sufficient wind resources exist over Lake Michigan to generate 7,684 kWh of power using a 850 kW rated turbine at elevations between 90 - 125 meters, a height lower than originally anticipated for optimum power generation; • Based on initial assessments, wind characteristics are not significantly different at distant (thirty-two mile) offshore locations as compared to near-shore (six mile) locations; • Significant cost savings can be achieved in generation wind energy at lower turbine heights and locating closer to shore. • Siting must be sufficiently distant from shore to minimize visual impact and to address public sentiment about offshore wind development; • Project results show that birds and bats do frequent the middle of Lake Michigan, bats more so than birds; • Based on the wind resource assessment and depths of Lake Michigan encountered during the project, future turbine placement will most likely need to incorporate floating or anchored technology; • The most appropriate siting of offshore wind energy locations will enable direct routing of transmission cables to existing generating and transmission facilities located along the Michigan shoreline; • Wind turbine noise propagation from a wind energy generating facility at a five mile offshore location will not be audible at the shoreline over normal background sound levels.

  3. Sweet lake geopressured-geothermal project, Magma Gulf-Technadril/DOE Amoco Fee. Annual report, December 1, 1979-February 27, 1981. Volume I. Drilling and completion test well and disposal well

    SciTech Connect (OSTI)

    Rodgers, R.W.

    1982-06-01

    The Sweet lake site is located approximately 15 miles southeast of Lake Charles in Cameron Parish, Louisiana. A geological study showed that the major structure in this area is a graben. The dip of the beds is northwesterly into the basin. A well drilled into the deep basin would find the target sand below 18,000', at high pressures and temperatures. However, since there is no well control in the basin, the specific site was chosen on the 15,000' contour of the target sand in the eastern, more narrow part of the garben. Those key control wells are present within one mile of the test well. The information acquired by drilling the test well confirmed the earlier geologic study. The target sand was reached at 15,065', had a porosity of over 20% and a permeability to water of 300 md. The original reservoir pressure was 12,060 psi and the bottom hole temperature 299{sup 0}F. There are approximately 250 net feet of sand available for the perforation. The disposal well was drilled to a total depth of 7440'.

  4. EIS-0498: Notice of Intent to Prepare an Environmental Impact...

    Broader source: Energy.gov (indexed) [DOE]

    Magnolia LNG and Lake Charles Expansion Projects, Calcasieu Parish, Louisiana The Federal ... build and operate a liquefied natural gas (LNG) facility on land at the Port of Lake ...

  5. GaAs photoconductive semiconductor switch

    DOE Patents [OSTI]

    Loubriel, G.M.; Baca, A.G.; Zutavern, F.J.

    1998-09-08

    A high gain, optically triggered, photoconductive semiconductor switch (PCSS) implemented in GaAs as a reverse-biased pin structure with a passivation layer above the intrinsic GaAs substrate in the gap between the two electrodes of the device is disclosed. The reverse-biased configuration in combination with the addition of the passivation layer greatly reduces surface current leakage that has been a problem for prior PCSS devices and enables employment of the much less expensive and more reliable DC charging systems instead of the pulsed charging systems that needed to be used with prior PCSS devices. 5 figs.

  6. GaN: Defect and Device Issues

    SciTech Connect (OSTI)

    Pearton, S.J.; Ren, F.; Shul, R.J.; Zolper, J.C.

    1998-11-09

    The role of extended and point defects, and key impurities such as C, O and H, on the electrical and optical properties of GaN is reviewed. Recent progress in the development of high reliability contacts, thermal processing, dry and wet etching techniques, implantation doping and isolation and gate insulator technology is detailed. Finally, the performance of GaN-based electronic and photonic devices such as field effect transistors, UV detectors, laser diodes and light-emitting diodes is covered, along with the influence of process-induced or grown-in defects and impurities on the device physics.

  7. GaAs photoconductive semiconductor switch

    DOE Patents [OSTI]

    Loubriel, Guillermo M. (Sandia Park, NM); Baca, Albert G. (Albuquerque, NM); Zutavern, Fred J. (Albuquerque, NM)

    1998-01-01

    A high gain, optically triggered, photoconductive semiconductor switch (PCSS) implemented in GaAs as a reverse-biased pin structure with a passivation layer above the intrinsic GaAs substrate in the gap between the two electrodes of the device. The reverse-biased configuration in combination with the addition of the passivation layer greatly reduces surface current leakage that has been a problem for prior PCSS devices and enables employment of the much less expensive and more reliable DC charging systems instead of the pulsed charging systems that needed to be used with prior PCSS devices.

  8. Enhanced thermoelectric transport in modulation-doped GaN/AlGaN core/shell nanowires

    SciTech Connect (OSTI)

    Song, Erdong; Li, Qiming; Swartzentruber, Brian; Pan, Wei; Wang, George T.; Martinez, Julio A.

    2015-11-25

    The thermoelectric properties of unintentionally n-doped core GaN/AlGaN core/shell N-face nanowires are reported. We found that the temperature dependence of the electrical conductivity is consistent with thermally activated carriers with two distinctive donor energies. The Seebeck coefficient of GaN/AlGaN nanowires is more than twice as large as that for the GaN nanowires alone. However, an outer layer of GaN deposited onto the GaN/AlGaN core/shell nanowires decreases the Seebeck coefficient at room temperature, while the temperature dependence of the electrical conductivity remains the same. We attribute these observations to the formation of an electron gas channel within the heavily-doped GaN core of the GaN/AlGaN nanowires. The room-temperature thermoelectric power factor for the GaN/AlGaN nanowires can be four times higher than the GaN nanowires. As a result, selective doping in bandgap engineered core/shell nanowires is proposed for enhancing the thermoelectric power.

  9. Enhanced thermoelectric transport in modulation-doped GaN/AlGaN core/shell nanowires

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Song, Erdong; Li, Qiming; Swartzentruber, Brian; Pan, Wei; Wang, George T.; Martinez, Julio A.

    2015-11-25

    The thermoelectric properties of unintentionally n-doped core GaN/AlGaN core/shell N-face nanowires are reported. We found that the temperature dependence of the electrical conductivity is consistent with thermally activated carriers with two distinctive donor energies. The Seebeck coefficient of GaN/AlGaN nanowires is more than twice as large as that for the GaN nanowires alone. However, an outer layer of GaN deposited onto the GaN/AlGaN core/shell nanowires decreases the Seebeck coefficient at room temperature, while the temperature dependence of the electrical conductivity remains the same. We attribute these observations to the formation of an electron gas channel within the heavily-doped GaN coremore » of the GaN/AlGaN nanowires. The room-temperature thermoelectric power factor for the GaN/AlGaN nanowires can be four times higher than the GaN nanowires. As a result, selective doping in bandgap engineered core/shell nanowires is proposed for enhancing the thermoelectric power.« less

  10. Structural and optical properties of InGaNGaN nanowire heterostructures grown by molecular beam epitaxy

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Limbach, F.; Gotschke, T.; Stoica, T.; Calarco, R.; Sutter, E.; Ciston, J.; Cusco, R.; Artus, L.; Kremling, S.; Ho?fling, S.; et al

    2011-01-01

    InGaN/GaN nanowire (NW) heterostructures grown by plasma assisted molecular beam epitaxy were studied in comparison to their GaN and InGaN counterparts. The InGaN/GaN heterostructure NWs are composed of a GaN NW, a thin InGaN shell, and a multifaceted InGaN cap wrapping the top part of the GaN NW. High-resolution transmission electron microscopy (HRTEM) images taken from different parts of a InGaN/GaN NW show a wurtzite structure of the GaN core and the epitaxial InGaN shell around it, while additional crystallographic domains are observed whithin the InGaN cap region. Large changes in the lattice parameter along the wire, from pure GaNmoreto higher In concentration demonstrate the successful growth of a complex InGaN/GaN NW heterostructure. Photoluminescence (PL) spectra of these heterostructure NW ensembles show rather broad and intense emission peak at 2.1 eV. However, ?-PL spectra measured on single NWs reveal a reduced broadening of the visible luminescence. The analysis of the longitudinal optical phonon Raman peak position and its shape reveal a variation in the In content between 20% and 30%, in agreement with the values estimated by PL and HRTEM investigations. The reported studies are important for understanding of the growth and properties of NW heterostructures suitable for applications in optoelectronics and photovoltaics.less

  11. Structural and optical properties of InGaN--GaN nanowire heterostructures grown by molecular beam epitaxy

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Limbach, F.; Gotschke, T.; Stoica, T.; Calarco, R.; Sutter, E.; Ciston, J.; Cusco, R.; Artus, L.; Kremling, S.; Hofling, S.; et al

    2011-01-01

    InGaN/GaN nanowire (NW) heterostructures grown by plasma assisted molecular beam epitaxy were studied in comparison to their GaN and InGaN counterparts. The InGaN/GaN heterostructure NWs are composed of a GaN NW, a thin InGaN shell, and a multifaceted InGaN cap wrapping the top part of the GaN NW. High-resolution transmission electron microscopy (HRTEM) images taken from different parts of a InGaN/GaN NW show a wurtzite structure of the GaN core and the epitaxial InGaN shell around it, while additional crystallographic domains are observed whithin the InGaN cap region. Large changes in the lattice parameter along the wire, from pure GaNmore » to higher In concentration demonstrate the successful growth of a complex InGaN/GaN NW heterostructure. Photoluminescence (PL) spectra of these heterostructure NW ensembles show rather broad and intense emission peak at 2.1 eV. However, μ-PL spectra measured on single NWs reveal a reduced broadening of the visible luminescence. The analysis of the longitudinal optical phonon Raman peak position and its shape reveal a variation in the In content between 20% and 30%, in agreement with the values estimated by PL and HRTEM investigations. The reported studies are important for understanding of the growth and properties of NW heterostructures suitable for applications in optoelectronics and photovoltaics.« less

  12. Structural and optical properties of InGaN--GaN nanowire heterostructures grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Limbach, F.; Gotschke, T.; Stoica, T.; Calarco, R.; Sutter, E.; Ciston, J.; Cusco, R.; Artus, L.; Kremling, S.; Hofling, S.; Worschech, L.; Grutzmacher, D.

    2011-01-01

    InGaN/GaN nanowire (NW) heterostructures grown by plasma assisted molecular beam epitaxy were studied in comparison to their GaN and InGaN counterparts. The InGaN/GaN heterostructure NWs are composed of a GaN NW, a thin InGaN shell, and a multifaceted InGaN cap wrapping the top part of the GaN NW. High-resolution transmission electron microscopy (HRTEM) images taken from different parts of a InGaN/GaN NW show a wurtzite structure of the GaN core and the epitaxial InGaN shell around it, while additional crystallographic domains are observed whithin the InGaN cap region. Large changes in the lattice parameter along the wire, from pure GaN to higher In concentration demonstrate the successful growth of a complex InGaN/GaN NW heterostructure. Photoluminescence (PL) spectra of these heterostructure NW ensembles show rather broad and intense emission peak at 2.1 eV. However, μ-PL spectra measured on single NWs reveal a reduced broadening of the visible luminescence. The analysis of the longitudinal optical phonon Raman peak position and its shape reveal a variation in the In content between 20% and 30%, in agreement with the values estimated by PL and HRTEM investigations. The reported studies are important for understanding of the growth and properties of NW heterostructures suitable for applications in optoelectronics and photovoltaics.

  13. InGaAs/GaAs quantum dot interdiffiusion induced by cap layer overgrowth

    SciTech Connect (OSTI)

    Jasinski, J.; Babinski, A.; Czeczott, M.; Bozek, R.

    2000-06-28

    The effect of thermal treatment during and after growth of InGaAs/GaAs quantum dot (QD) structures was studied. Transmission electron microscopy and atomic force microscopy confirmed the presence of interacting QDs, as was expected from analysis of temperature dependence of QD photoluminescence (PL) peak. The results indicate that the effect of post-growth annealing can be similar to the effect of elevated temperature of capping layer growth. Both, these thermal treatments can lead to a similar In and Ga interdiffiusion resulting in a similar blue-shift of QD PL peak.

  14. Optical spectroscopy of quantum confined states in GaAs/AlGaAs quantum well tubes

    SciTech Connect (OSTI)

    Shi, Teng; Fickenscher, Melodie; Smith, Leigh; Jackson, Howard; Yarrison-Rice, Jan; Gao, Qiang; Tan, Hoe; Jagadish, Chennupati; Etheridge, Joanne; Wong, Bryan M.

    2013-12-04

    We have investigated the quantum confinement of electronic states in GaAs/Al{sub x}Ga{sub 1?x}As nanowire heterostructures which contain radial GaAs quantum wells of either 4nm or 8nm. Photoluminescence and photoluminescence excitation spectroscopy are performed on single nanowires. We observed emission and excitation of electron and hole confined states. Numerical calculations of the quantum confined states using the detailed structural information on the quantum well tubes show excellent agreement with these optical results.

  15. Investigation of surface-plasmon coupled red light emitting InGaN/GaN multi-quantum well with Ag nanostructures coated on GaN surface

    SciTech Connect (OSTI)

    Li, Yi; Liu, Bin E-mail: rzhang@nju.edu.cn; Zhang, Rong E-mail: rzhang@nju.edu.cn; Xie, Zili; Zhuang, Zhe; Dai, JiangPing; Tao, Tao; Zhi, Ting; Zhang, Guogang; Chen, Peng; Ren, Fangfang; Zhao, Hong; Zheng, Youdou

    2015-04-21

    Surface-plasmon (SP) coupled red light emitting InGaN/GaN multiple quantum well (MQW) structure is fabricated and investigated. The centre wavelength of 5-period InGaN/GaN MQW structure is about 620?nm. The intensity of photoluminescence (PL) for InGaN QW with naked Ag nano-structures (NS) is only slightly increased due to the oxidation of Ag NS as compared to that for the InGaN QW. However, InGaN QW with Ag NS/SiO{sub 2} structure can evidently enhance the emission efficiency due to the elimination of surface oxide layer of Ag NS. With increasing the laser excitation power, the PL intensity is enhanced by 25%53% as compared to that for the SiO{sub 2} coating InGaN QW. The steady-state electric field distribution obtained by the three-dimensional finite-difference time-domain method is different for both structures. The proportion of the field distributed in the Ag NS for the GaN/Ag NS/SiO{sub 2} structure is smaller as compared to that for the GaN/naked Ag NS structure. As a result, the energy loss of localized SP modes for the GaN/naked Ag NS structure will be larger due to the absorption of Ag layer.

  16. Strain-compensated (Ga,In)N/(Al,Ga)N/GaN multiple quantum wells for improved yellow/amber light emission

    SciTech Connect (OSTI)

    Lekhal, K.; Damilano, B. De Mierry, P.; Venngus, P.; Ngo, H. T.; Rosales, D.; Gil, B.; Hussain, S.

    2015-04-06

    Yellow/amber (570600?nm) emitting In{sub x}Ga{sub 1?x}N/Al{sub y}Ga{sub 1?y}N/GaN multiple quantum wells (QWs) have been grown by metal organic chemical vapor deposition on GaN-on- sapphire templates. When the (Al,Ga)N thickness of the barrier increases, the room temperature photoluminescence is red-shifted while its yield increases. This is attributed to an increase of the QW internal electric field and an improvement of the material quality due to the compensation of the compressive strain of the In{sub x}Ga{sub 1?x}N QWs by the Al{sub y}Ga{sub 1?y}N layers, respectively.

  17. On strongly GA-convex functions and stochastic processes

    SciTech Connect (OSTI)

    Bekar, Nurgl Okur; Akdemir, Hande Gnay; ??can, ?mdat

    2014-08-20

    In this study, we introduce strongly GA-convex functions and stochastic processes. We provide related well-known Kuhn type results and Hermite-Hadamard type inequality for strongly GA-convex functions and stochastic processes.

  18. Stochastic Forecasting of Algae Blooms in Lakes

    SciTech Connect (OSTI)

    Wang, Peng; Tartakovsky, Daniel M.; Tartakovsky, Alexandre M.

    2013-01-15

    We consider the development of harmful algae blooms (HABs) in a lake with uncertain nutrients inflow. Two general frameworks, Fokker-Planck equation and the PDF methods, are developed to quantify the resultant concentration uncertainty of various algae groups, via deriving a deterministic equation of their joint probability density function (PDF). A computational example is examined to study the evolution of cyanobacteria (the blue-green algae) and the impacts of initial concentration and inflow-outflow ratio.

  19. Energy Efficient Buildings, Salt Lake County, Utah

    SciTech Connect (OSTI)

    Barnett, Kimberly

    2012-04-30

    Executive Summary Salt Lake County's Solar Photovoltaic Project - an unprecedented public/private partnership Salt Lake County is pleased to announce the completion of its unprecedented solar photovoltaic (PV) installation on the Calvin R. Rampton Salt Palace Convention Center. This 1.65 MW installation will be one the largest solar roof top installations in the country and will more than double the current installed solar capacity in the state of Utah. Construction is complete and the system will be operational in May 2012. The County has accomplished this project using a Power Purchase Agreement (PPA) financing model. In a PPA model a third-party solar developer will finance, develop, own, operate, and maintain the solar array. Salt Lake County will lease its roof, and purchase the power from this third-party under a long-term Power Purchase Agreement contract. In fact, this will be one of the first projects in the state of Utah to take advantage of the recent (March 2010) legislation which makes PPA models possible for projects of this type. In addition to utilizing a PPA, this solar project will employ public and private capital, Energy Efficiency and Conservation Block Grants (EECBG), and public/private subsidized bonds that are able to work together efficiently because of the recent stimulus bill. The project also makes use of recent changes to federal tax rules, and the recent re-awakening of private capital markets that make a significant public-private partnership possible. This is an extremely innovative project, and will mark the first time that all of these incentives (EECBG grants, Qualified Energy Conservation Bonds, New Markets tax credits, investment tax credits, public and private funds) have been packaged into one project. All of Salt Lake County's research documents and studies, agreements, and technical information is available to the public. In addition, the County has already shared a variety of information with the public through webinars, site tours, presentations, and written correspondence.

  20. Composition profiling of GaAs/AlGaAs quantum dots grown by droplet epitaxy

    SciTech Connect (OSTI)

    Bocquel, J.; Koenraad, P. M.; Giddings, A. D.; Prosa, T. J.; Larson, D. J.; Mano, T.

    2014-10-13

    Droplet epitaxy (DE) is a growth method which can create III-V quantum dots (QDs) whose optoelectronic properties can be accurately controlled through the crystallisation conditions. In this work, GaAs/AlGaAs DE-QDs have been analyzed with the complimentary techniques of cross-sectional scanning tunneling microscopy and atom probe tomography. Structural details and a quantitative chemical analysis of QDs of different sizes are obtained. Most QDs were found to be pure GaAs, while a small proportion exhibited high intermixing caused by a local etching process. Large QDs with a high aspect ratio were observed to have an Al-rich crown above the GaAs QD. This structure is attributed to differences in mobility of the cations during the capping phase of the DE growth.

  1. High-field quasi-ballistic transport in AlGaN/GaN heterostructures

    SciTech Connect (OSTI)

    Danilchenko, B. A.; Tripachko, N. A.; Belyaev, A. E.; Vitusevich, S. A. Hardtdegen, H.; Lth, H.

    2014-02-17

    Mechanisms of electron transport formation in 2D conducting channels of AlGaN/GaN heterostructures in extremely high electric fields at 4.2?K have been studied. Devices with a narrow constriction for the current flow demonstrate high-speed electron transport with an electron velocity of 6.8??10{sup 7}?cm/s. Such a velocity is more than two times higher than values reported for conventional semiconductors and about 15% smaller than the limit value predicted for GaN. Superior velocity is attained in the channel with considerable carrier reduction. The effect is related to a carrier runaway phenomenon. The results are in good agreement with theoretical predictions for GaN-based materials.

  2. AlGaAs/GaAs photovoltaic converters for high power narrowband radiation

    SciTech Connect (OSTI)

    Khvostikov, Vladimir; Kalyuzhnyy, Nikolay; Mintairov, Sergey; Potapovich, Nataliia; Shvarts, Maxim; Sorokina, Svetlana; Andreev, Viacheslav; Luque, Antonio

    2014-09-26

    AlGaAs/GaAs-based laser power PV converters intended for operation with high-power (up to 100 W/cm{sup 2}) radiation were fabricated by LPE and MOCVD techniques. Monochromatic (? = 809 nm) conversion efficiency up to 60% was measured at cells with back surface field and low (x = 0.2) Al concentration 'window'. Modules with a voltage of 4 V and the efficiency of 56% were designed and fabricated.

  3. InGaAs/GaAs (110) quantum dot formation via step meandering

    SciTech Connect (OSTI)

    Diez-Merino, Laura; Tejedor, Paloma

    2011-07-01

    InGaAs (110) semiconductor quantum dots (QDs) offer very promising prospects as a material base for a new generation of high-speed spintronic devices, such as single electron transistors for quantum computing. However, the spontaneous formation of InGaAs QDs is prevented by two-dimensional (2D) layer-by-layer growth on singular GaAs (110) substrates. In this work we have studied, by using atomic force microscopy and photoluminescence spectroscopy (PL), the growth of InGaAs/GaAs QDs on GaAs (110) stepped substrates by molecular beam epitaxy (MBE), and the modification of the adatom incorporation kinetics to surface steps in the presence of chemisorbed atomic hydrogen. The as-grown QDs exhibit lateral dimensions below 100 nm and emission peaks in the 1.35-1.37 eV range. It has been found that a step meandering instability derived from the preferential attachment of In adatoms to [110]-step edges relative to [11n]-type steps plays a key role in the destabilization of 2D growth that leads to 3D mound formation on both conventional and H-terminated vicinal substrates. In the latter case, the driving force for 3D growth via step meandering is enhanced by H-induced upward mass transport in addition to the lower energy cost associated with island formation on H-terminated substrates, which results in a high density array of InGaAs/GaAs dots selectively nucleated on the terrace apices with reduced lateral dimensions and improved PL efficiency relative to those of conventional MBE-grown samples.

  4. Climate Action Champions: Blue Lake Rancheria Tribe, CA | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Blue Lake Rancheria Tribe, CA Climate Action Champions: Blue Lake Rancheria Tribe, CA The Blue Lake Rancheria, California, a federally recognized Native American tribal Government and community, is located on over 100 acres of land spanning the scenic Mad River in northwestern California. In its operational strategy, the Tribe has implemented the ‘seven generations’ philosophy, where actions taken today will have a positive impact for seven generations to come. This results

  5. Paleoclimatic significance of lake level fluctuations in the Lahontan Basin. [Pyramid Lake, Nevada

    SciTech Connect (OSTI)

    Benson, L.V.

    1980-08-01

    An energy flux balance model has been developed which treats evaporation as a function of air temperature, surface water temperature, precipitable water aloft, the amount, height, and type of sky cover, and the optical air mass. The model has been used to estimate the mean historical evaporation rate for Pyramid Lake, Nevada, using as input climatic data from the Reno area averaged over the period 1950 to 1975. Estimated and measured values of the mean annual evaporation rate were found to be in good agreement. The model was used to simulate changes in the level, the surface area and the volume of paleo Lake Lahontan. In particular, possible climatic states responsible for past high stands (1270 and 1330 m) were investigated. A conservative range of discharge values was used in the calculations. Results of the simulations indicate the fundamental importance of sky cover in the creation and destruction of large lake systems.

  6. GaNPAs Solar Cells Lattice-Matched To GaP: Preprint

    SciTech Connect (OSTI)

    Geisz, J. F.; Friedman, D. J.; Kurtz, S.

    2002-05-01

    This conference paper describes the III-V semiconductors grown on silicon substrates are very attractive for lower-cost, high-efficiency multijunction solar cells, but lattice-mismatched alloys that result in high dislocation densities have been unable to achieve satisfactory performance. GaNxP1-x-yAsy is a direct-gap III-V alloy that can be grown lattice-matched to Si when y= 4.7x - 0.1. We propose the use of lattice-matched GaNPAs on silicon for high-efficiency multijunction solar cells. We have grown GaNxP1-x-yAsy on GaP (with a similar lattice constant to silicon) by metal-organic chemical vapor phase epitaxy with direct band-gaps in the range of 1.5 to 2.0 eV. We demonstrate the performance of single-junction GaNxP1-x-yAsy solar cells grown on GaP substrates and discuss the prospects for the development of monolithic high-efficiency multijunction solar cells based on silicon substrates.

  7. Lateral and Vertical Transistors Using the AlGaN/GaN Heterostructure

    SciTech Connect (OSTI)

    Chowdhury, S; Mishra, UK

    2013-10-01

    Power conversion losses are endemic in all areas of electricity consumption, including motion control, lighting, air conditioning, and information technology. Si, the workhorse of the industry, has reached its material limits. Increasingly, the lateral AlGaN/GaN HEMT based on gallium nitride (GaN-on-Si) is becoming the device of choice for medium power electronics as it enables high-power conversion efficiency and reduced form factor at attractive pricing for wide market penetration. The reduced form factor enabled by high-efficiency operation at high frequency further enables significant system price reduction because of savings in bulky extensive passive elements and heat sink costs. The high-power market, however, still remains unaddressed by lateral GaN devices. The current and voltage demand for high power conversion application makes the chip area in a lateral topology so large that it becomes more difficult to manufacture. Vertical GaN devices would play a big role alongside of silicon carbide (SiC) to address the high power conversion needs. In this paper, the development, performance, and status of lateral and vertical GaN devices are discussed.

  8. Facies distributions within contrasting structural components of a rift lake: Lake Tanganyika, Africa

    SciTech Connect (OSTI)

    Soreghan, M.J.; Cohen, A.S. )

    1991-03-01

    Lake Tanganyika is the most widely cited modern analog for interpreting ancient rift lakes; thus, understanding controls on its facies distribution is critical for refining stratigraphic models for rifts. Four recurrent margin types occur along the alternating half-graben structure of the lake: rift axes, platforms, escarpments, and accommodation zones. Data from study sites in the northern part of the lake suggest that predictable facies differences exist between these structural margin types. The rift axis site comprises a low-gradient, clastic (wave/current)-dominated deltaic system, with strong facies asymmetry and minor carbonate accumulations on raised benches. The platform margin site comprises a series of structurally controlled benches over which long, continuous facies tracts occur. Carbonate sands, muds, and shell gravel dominate; clastics are limited to moderate-sized silty deltas and long, narrow shoreface sands. The escarpment margin site is a steep-gradient system along which small ({lt}1 km{sup 2}) fan deltas alternate with cemented talus. The accommodation zone margin sites are also dominated by rugged structural relief, generally small fan deltas, and semicontinuous shoreface sand belts ({gt}5 km) onshore and poorly sorted silts offshore. TOC from fine-grained samples reflects the contrast in margin types. TOC values for the platform and rift axis range from 0.4 - 2.1 wt. % (avg. 1.3%), whereas accommodation zone and escarpment margin values range from 0.5-5.5% (avg. 3.0%). Acid insoluble sulfur shows a similar trend. Although all data are significantly correlated with depth, the relative area of the lake margin above and below the oxicline is directly controlled by the structural style of the lake margin.

  9. Lazy Lake, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    it. Lazy Lake is a village in Broward County, Florida. It falls under Florida's 20th congressional district.12 References US Census Bureau Incorporated place and...

  10. Lauderdale Lakes, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    it. Lauderdale Lakes is a city in Broward County, Florida. It falls under Florida's 20th congressional district and Florida's 23rd congressional district.12 References ...

  11. Geothermal Literature Review At Lake City Hot Springs Area (Benoit...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Lake City Hot Springs Area (Benoit, Et Al., 2004) Exploration Activity...

  12. Acomita Lake, New Mexico: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Acomita Lake, New Mexico: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 35.0703192, -107.6136628 Show Map Loading map... "minzoom":false,"map...

  13. East Soda Lake Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    ","group":"","inlineLabel":"","visitedicon":"" Hide Map Location Fallon, NV County Churchill County, NV Geothermal Area Soda Lake Geothermal Area Geothermal Region Northwest...

  14. Cloud Lake, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Cloud Lake, Florida: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 26.6761772, -80.0739308 Show Map Loading map... "minzoom":false,"mappingse...

  15. Lake of the Woods County, Minnesota: Energy Resources | Open...

    Open Energy Info (EERE)

    in Lake of the Woods County, Minnesota Baudette, Minnesota Roosevelt, Minnesota Williams, Minnesota Retrieved from "http:en.openei.orgwindex.php?titleLakeoftheWoodsC...

  16. Lake Hart, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Lake Hart, Florida: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 28.3927849, -81.2406232 Show Map Loading map... "minzoom":false,"mappingser...

  17. Lake County- Energy Smart Colorado Renewable Energy Rebate Program

    Broader source: Energy.gov [DOE]

    Residents of Roaring Fork Valley and Eagle, Gunnison, Lake, and Summit Counties are eligible for energy efficiency and renewable energy assistance, rebates, and financing through the Energy Smart...

  18. Lake County- Energy Smart Colorado Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Residents of Roaring Fork Valley and Eagle, Gunnison, Lake, and Summit Counties are eligible for energy efficiency and renewable energy assistance, rebates, and financing through the Energy Smart...

  19. Palmer Lake, Colorado: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    district.12 Registered Energy Companies in Palmer Lake, Colorado American Electric Vehicles Inc References US Census Bureau Incorporated place and minor civil...

  20. City of Lake Park, Iowa (Utility Company) | Open Energy Information

    Open Energy Info (EERE)

    City of Place: Iowa Phone Number: (712) 832-3667 Website: www.lakeparkia.comindex.phpl Facebook: https:www.facebook.compagesLake-Park-Iowa104075932961159 Outage Hotline:...

  1. Stepout-Deepening Wells At Medicine Lake Area (Warpinski, Et...

    Open Energy Info (EERE)

    2) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Stepout-Deepening Wells At Medicine Lake Area (Warpinski, Et Al., 2002) Exploration Activity...

  2. Moose Lake Water & Light Comm | Open Energy Information

    Open Energy Info (EERE)

    Website: www.mooselakepower.com Facebook: https:www.facebook.compagesMoose-Lake-Water-Light-Commission445326012175319?frefts Outage Hotline: (218) 485-4100 References:...

  3. Lake Country Wind Energy LLC | Open Energy Information

    Open Energy Info (EERE)

    Wind Energy LLC Jump to: navigation, search Name: Lake Country Wind Energy LLC Place: Minnesota Zip: 56209 Sector: Renewable Energy, Wind energy Product: Minnesota-based wind...

  4. Iowa Lakes Community College Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    Community College Energy Purchaser Iowa Lakes Community College Location Esterville IA Coordinates 43.397912, -94.81768 Show Map Loading map... "minzoom":false,"mappingse...

  5. Static Temperature Survey At Medicine Lake Area (Warpinski, Et...

    Open Energy Info (EERE)

    GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Static Temperature Survey At Medicine Lake Area (Warpinski, Et Al., 2002) Exploration Activity Details Location Medicine...

  6. Isotopic Analysis At Clear Lake Area (Thompson, Et Al., 1992...

    Open Energy Info (EERE)

    Exploration Activity Details Location Clear Lake Area Exploration Technique Isotopic Analysis- Fluid Activity Date Usefulness useful DOE-funding Unknown Notes Deuterium and...

  7. Taylor Lake Village, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    dataset (All States, all geography) US Census Bureau Congressional Districts by Places. Retrieved from "http:en.openei.orgwindex.php?titleTaylorLakeVillage,Texas&oldid...

  8. Angola on the Lake, New York: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Angola on the Lake, New York: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 42.6547811, -79.0489273 Show Map Loading map......

  9. Lake Forest, California: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Lake Forest, California: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 33.6469661, -117.689218 Show Map Loading map... "minzoom":false,"mappi...

  10. Lake Forest, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Lake Forest, Florida: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 30.3980165, -81.6737085 Show Map Loading map... "minzoom":false,"mappings...

  11. China Lake South Range Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: China Lake South Range Geothermal Project Project Location Information Coordinates 35.65,...

  12. Blue Lake Plant Biomass Facility | Open Energy Information

    Open Energy Info (EERE)

    National Map Retrieved from "http:en.openei.orgwindex.php?titleBlueLakePlantBiomassFacility&oldid397215" Feedback Contact needs updating Image needs updating...

  13. Salt Lake City, Utah: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Salt Lake City, Utah: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 40.7607793, -111.8910474 Show Map Loading map... "minzoom":false,"mapping...

  14. Data Acquisition-Manipulation At Lake City Hot Springs Area ...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At Lake City Hot Springs Area (Warpinski, Et Al., 2004)...

  15. Lake Encroachment Permit Application, Abutting Land Owner Addendum...

    Open Energy Info (EERE)

    Lake Encroachment Permit Application, Abutting Land Owner Addendum Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- Permit ApplicationPermit...

  16. Star Lake, New York: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Lake, New York: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 44.159785, -75.0315825 Show Map Loading map... "minzoom":false,"mappingservice"...

  17. Marion Lake, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Marion Lake, Minnesota: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 47.1383694, -91.9960581 Show Map Loading map... "minzoom":false,"mappin...

  18. Green Lake County, Wisconsin: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Mackford, Wisconsin Markesan, Wisconsin Marquette, Wisconsin Princeton, Wisconsin St. Marie, Wisconsin Retrieved from "http:en.openei.orgwindex.php?titleGreenLakeCounty,W...

  19. Time-Domain Electromagnetics At Soda Lake Area (Combs 2006) ...

    Open Energy Info (EERE)

    Time-Domain Electromagnetics At Soda Lake Area (Combs 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Time-Domain Electromagnetics At Soda...

  20. Compound and Elemental Analysis At Clear Lake Area (Thompson...

    Open Energy Info (EERE)

    Details Location Clear Lake Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes Based on the above discussion,...

  1. Geothermometry At Clear Lake Area (Thompson, Et Al., 1992) |...

    Open Energy Info (EERE)

    Activity Details Location Clear Lake Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Based on the above discussion,...

  2. Compound and Elemental Analysis At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Exploration Activity Details Location Fish...

  3. Ground Gravity Survey At Lake City Hot Springs Area (Warpinski...

    Open Energy Info (EERE)

    Exploration Activity Details Location Lake City Hot Springs Area Exploration Technique Ground Gravity Survey Activity Date Usefulness not indicated DOE-funding Unknown Notes The...

  4. Heat flow studies, Coso Geothermal Area, China Lake, California...

    Open Energy Info (EERE)

    Heat flow studies in the Coso Geothermal Area were conducted at China Lake, California. Temperature measurements were completed in nine of the heat flow boreholes. Temperatures...

  5. Obama Administration Hosts Great Lakes Offshore Wind Workshop...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... The Great Lakes Wind Collaborative is a multi-sector coalition of wind energy stakeholders working to facilitate the sustainable development of wind power in the binational Great ...

  6. Salt Lake County, Utah: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Creek Valley, Utah Magna, Utah Midvale, Utah Millcreek, Utah Mount Olympus, Utah Murray, Utah Riverton, Utah Salt Lake City, Utah Sandy, Utah South Jordan, Utah South Salt...

  7. Compound and Elemental Analysis At Lake City Hot Springs Area...

    Open Energy Info (EERE)

    Date Usefulness useful DOE-funding Unknown References Chris Sladek, Greg B. Arehart, Walter R. Benoit (2004) Geochemistry Of The Lake City Geothermal System, California, Usa...

  8. Seismic Structure And Seismicity Of The Cooling Lava Lake Of...

    Open Energy Info (EERE)

    Of The Cooling Lava Lake Of Kilauea Iki, Hawaii Abstract The use of multiple methods is indispensable for the determination of the seismic properties of a complex body...

  9. Hush Lake, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hush Lake, Minnesota: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 47.4494204, -92.1031839 Show Map Loading map... "minzoom":false,"mappings...

  10. Cordes Lakes, Arizona: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Lakes, Arizona: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 34.3078074, -112.1034912 Show Map Loading map... "minzoom":false,"mappingservic...

  11. Mountain Lakes, New Jersey: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Mountain Lakes, New Jersey: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 40.8948212, -74.4329314 Show Map Loading map......

  12. The Great Lakes Insitute for Energy Innovation | Open Energy...

    Open Energy Info (EERE)

    Insitute for Energy Innovation Jump to: navigation, search Name: The Great Lakes Insitute for Energy Innovation Place: Cleveland, Ohio Zip: 44106 Website: energy.case.edu...

  13. Groundwater recharge from Long Lake, Indiana Dunes National Lakeshore

    SciTech Connect (OSTI)

    Isiorho, S.A.; Beeching, F.M. (Indiana Univ., Fort Wayne, IN (United States). Geosciences Dept.); Whitman, R.L.; Stewart, P.M. (National Park Services, Porter, IN (United States). Indiana Dunes National Lakeshore); Gentleman, M.A.

    1992-01-01

    Long Lake, located between Lake Michigan and the Dune-complexes of Indiana Dunes, was formed during Pleistocene and Holocene epochs. The lake is currently being studied to understand the detailed hydrology. One of the objective of the study is to understand the hydrologic relationship between the lake and a water treatment holding pond to the northeast. Understanding the water movement between the two bodies of water, if any, would be very important in the management and protection of nature preserves in the area. Seepage measurement and minipiezometric tests indicate groundwater recharge from Long Lake. The groundwater recharge rate is approximately 1.40 to 22.28 x 10[sup [minus]4] m/day. An estimate of the amount of recharge of 7.0 x 10[sup 6] m[sup 3]/y may be significant in terms of groundwater recharge of the upper aquifer system of the Dunes area. The water chemistry of the two bodies of water appears to be similar, however, the pH of the holding pond is slightly alkaline (8.5) while that of Long Lake is less alkaline (7.7). There appears to be no direct contact between the two bodies of water (separated by approximately six meters of clay rich sediment). The geology of the area indicates a surficial aquifer underlying Long Lake. The lake should be regarded as a recharge area and should be protected from pollutants as the degradation of the lake would contaminate the underlying aquifer.

  14. Lattice-Mismatched GaAs/InGaAs Two-Junction Solar Cells by Direct Wafer Bonding

    SciTech Connect (OSTI)

    Tanabe, K.; Aiken, D. J.; Wanlass, M. W.; Morral, A. F.; Atwater, H. A.

    2006-01-01

    Direct bonded interconnect between subcells of a lattice-mismatched III-V compound multijunction cell would enable dislocation-free active regions by confining the defect network needed for lattice mismatch accommodation to tunnel junction interfaces, while metamorphic growth inevitably results in less design flexibility and lower material quality than is desirable. The first direct-bond interconnected multijunction solar cell, a two-terminal monolithic GaAs/InGaAs two-junction solar cell, is reported and demonstrates viability of direct wafer bonding for solar cell applications. The tandem cell open-circuit voltage was approximately the sum of the subcell open-circuit voltages. This achievement shows direct bonding enables us to construct lattice-mismatched III-V multijunction solar cells and is extensible to an ultrahigh efficiency InGaP/GaAs/InGaAsP/InGaAs four-junction cell by bonding a GaAs-based lattice-matched InGaP/GaAs subcell and an InP-based lattice-matched InGaAsP/InGaAs subcell. The interfacial resistance experimentally obtained for bonded GaAs/InP smaller than 0.10 Ohm-cm{sup 2} would result in a negligible decrease in overall cell efficiency of {approx}0.02%, under 1-sun illumination.

  15. Pressure Temperature Log At Soda Lake Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Soda Lake Area (DOE GTP) Exploration Activity Details Location Soda Lake...

  16. Development Wells At Soda Lake Area (DOE GTP) | Open Energy Informatio...

    Open Energy Info (EERE)

    Soda Lake Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Development Wells At Soda Lake Area (DOE GTP) Exploration Activity...

  17. Reflection Survey At Soda Lake Area (DOE GTP) | Open Energy Informatio...

    Open Energy Info (EERE)

    Soda Lake Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Soda Lake Area (DOE GTP) Exploration Activity...

  18. Reflection Survey At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Reflection Survey At Fish Lake Valley Area (DOE GTP) Exploration...

  19. Field Mapping At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Fish Lake Valley Area (DOE GTP) Exploration Activity Details Location Fish Lake Valley Area...

  20. Density Log at Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density Log at Fish Lake Valley Area (DOE GTP) Exploration...

  1. Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP) | Open...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP)...

  2. Slim Holes At Fish Lake Valley Area (Deymonaz, Et Al., 2008)...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Slim Holes At Fish Lake Valley Area (Deymonaz, Et...

  3. Core Analysis At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Core Analysis At Fish Lake Valley Area (DOE GTP) Exploration...

  4. Flow Test At Fish Lake Valley Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Flow Test At Fish Lake Valley Area (DOE GTP) Exploration Activity...

  5. Resistivity Log At Fish Lake Valley Area (DOE GTP) | Open Energy...

    Open Energy Info (EERE)

    Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Resistivity Log At Fish Lake Valley Area (DOE GTP) Exploration...

  6. Thermal And-Or Near Infrared At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal And-Or Near Infrared At Fish Lake Valley...

  7. Fond du Lac Band Leads Climate Resilience Efforts on Lake Superior...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Fond du Lac Band Leads Climate Resilience Efforts on Lake Superior Chippewa Indian Reservation Fond du Lac Band Leads Climate Resilience Efforts on Lake Superior Chippewa Indian ...

  8. Water Sampling At Hot Lake Area (Wood, 2002) | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Hot Lake Area (Wood, 2002) Exploration Activity Details Location Hot Lake...

  9. Flow Test At Soda Lake Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Flow Test At Soda Lake Area (DOE GTP) Exploration Activity Details Location Soda Lake Area...

  10. Hybrid type-I InAs/GaAs and type-II GaSb/GaAs quantum dot structure with enhanced photoluminescence

    SciTech Connect (OSTI)

    Ji, Hai-Ming; Liang, Baolai Simmonds, Paul J.; Juang, Bor-Chau; Yang, Tao; Young, Robert J.; Huffaker, Diana L.

    2015-03-09

    We investigate the photoluminescence (PL) properties of a hybrid type-I InAs/GaAs and type-II GaSb/GaAs quantum dot (QD) structure grown in a GaAs matrix by molecular beam epitaxy. This hybrid QD structure exhibits more intense PL with a broader spectral range, compared with control samples that contain only InAs or GaSb QDs. This enhanced PL performance is attributed to additional electron and hole injection from the type-I InAs QDs into the adjacent type-II GaSb QDs. We confirm this mechanism using time-resolved and power-dependent PL. These hybrid QD structures show potential for high efficiency QD solar cell applications.

  11. Properties of (Ga,Mn)As codoped with Li

    SciTech Connect (OSTI)

    Miyakozawa, Shohei; Chen, Lin; Matsukura, Fumihiro; Ohno, Hideo

    2014-06-02

    We grow Li codoped (Ga,Mn)As layers with nominal Mn composition up to 0.15 by molecular beam epitaxy. The layers before and after annealing are characterized by x-ray diffraction, transport, magnetization, and ferromagnetic resonance measurements. The codoping with Li reduces the lattice constant and electrical resistivity of (Ga,Mn)As after annealing. We find that (Ga,Mn)As:Li takes similar Curie temperature to that of (Ga,Mn)As, but with pronounced magnetic moments and in-plane magnetic anisotropy, indicating that the Li codoping has nontrivial effects on the magnetic properties of (Ga,Mn)As.

  12. Three-junction solar cells comprised of a thin-film GaInP/GaAs tandem cell mechanically stacked on a Si cell

    SciTech Connect (OSTI)

    Yazawa, Y.; Tamura, K.; Watahiki, S.; Kitatani, T.; Ohtsuka, H.; Warabisako, T.

    1997-12-31

    Three-junction tandem solar cells were fabricated by mechanical stacking of a thin-film GaInP/GaAs monolithic tandem cell and a Si cell. The epitaxial lift-off (ELO) technique was used for the thinning of GaInP/GaAs tandem cells. Both spectral responses of the GaInP top cell and the GaAs middle cell in the thin-film GaInP/GaAs monolithic tandem cell were conserved. The Si cell performance has been improved by reducing the absorption loss in the GaAs substrate.

  13. Reactive codoping of GaAlInP compound semiconductors

    DOE Patents [OSTI]

    Hanna, Mark Cooper; Reedy, Robert

    2008-02-12

    A GaAlInP compound semiconductor and a method of producing a GaAlInP compound semiconductor are provided. The apparatus and method comprises a GaAs crystal substrate in a metal organic vapor deposition reactor. Al, Ga, In vapors are prepared by thermally decomposing organometallic compounds. P vapors are prepared by thermally decomposing phospine gas, group II vapors are prepared by thermally decomposing an organometallic group IIA or IIB compound. Group VIB vapors are prepared by thermally decomposing a gaseous compound of group VIB. The Al, Ga, In, P, group II, and group VIB vapors grow a GaAlInP crystal doped with group IIA or IIB and group VIB elements on the substrate wherein the group IIA or IIB and a group VIB vapors produced a codoped GaAlInP compound semiconductor with a group IIA or IIB element serving as a p-type dopant having low group II atomic diffusion.

  14. Chemical beam epitaxy growth of AlGaAs/GaAs tunnel junctions using trimethyl aluminium for multijunction solar cells

    SciTech Connect (OSTI)

    Paquette, B.; DeVita, M.; Turala, A.; Kolhatkar, G.; Boucherif, A.; Jaouad, A.; Aimez, V.; Ars, R.; Wilkins, M.; Wheeldon, J. F.; Walker, A. W.; Hinzer, K.; Fafard, S.

    2013-09-27

    AlGaAs/GaAs tunnel junctions for use in high concentration multijunction solar cells were designed and grown by chemical beam epitaxy (CBE) using trimethyl aluminium (TMA) as the p-dopant source for the AlGaAs active layer. Controlled hole concentration up to 4?10{sup 20} cm{sup ?3} was achieved through variation in growth parameters. Fabricated tunnel junctions have a peak tunneling current up to 6140 A/cm{sup 2}. These are suitable for high concentration use and outperform GaAs/GaAs tunnel junctions.

  15. NREL: Geothermal Technologies - Charles Visser

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Quick. "Optimizing Geothermal Drilling: Oil and Gas Technology Transfer." ... Visser, C.F., et al. 1983. Geologic evaluation of the Navarin Basin, offshore Bering Sea, OCS 83. Amoco ...

  16. Charles Rousseaux | Department of Energy

    Energy Savers [EERE]

    through ultramarathons. Most Recent New Perspective on a Corrosive Problem March 28 Deep Insights from Thin Layers March 13 Amazing Materials and the Emerging Field of...

  17. Charles F. McMillan

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Improving neutron capture rate predictions using Apollo + HELIOS Experiment development : A. Couture, M. Devlin, H. Y. Lee and J. M. O'Donnell (LANSCE-NS) Nuclear reaction model and mass: T. Kawano, M. Bertolli, P. Talou and P. Möller (T2) Supernova modeling : C. Fryer, A. Hungerford, and G. Rockefeller (CCS, XTD) ATLAS Users Meeting on May 15-16 2014 | Los Alamos National Laboratory | | 2 Operated by Los Alamos National Security, LLC for the U.S. Department of Energy's NNSA Slide 2 Neutron

  18. Charles F. McMillan

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2. Operate inside HELIOS - 3 T magnetic field and vacuum 3. portable | Los Alamos ... Distance from the target (arb. Unit) Proton groups detected by Position Sensitive ...

  19. Charles Macal | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Diesel Fuel economy Fuel injection Heavy-duty vehicles Hybrid & electric vehicles Hydrogen & ... Systems architecture & design Physics Medium-energy physics High-energy physics ...

  20. Charles F. McMillan

    Office of Environmental Management (EM)

    ... A drive coil is mounted at the center of the two flow tubes geometry to vibrate the process fluid and tubes at a natural harmonic frequency. A magnet and a pickoff coil are located ...

  1. Charles Rousseaux | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of content from DOE's national labs and research facilities to the Office of Science ... from Georgetown University, an MS in Biology from Wayne State University and a BA in ...

  2. Salt Lake County Residential Solar Financing Study | Department of Energy

    Energy Savers [EERE]

    Salt Lake City, Utah A White House Climate Action Champions Case Study INDEX Executive Summary.............................. 2 Climate Action Champion.................... 2 Project Spotlight.................................... 3 Challenges and lessons learned.......... 4 Resources & Contacts........................... 5 2 Executive Summary Salt Lake City has a robust set of ambitious climate goals that target reducing emissions while simultaneously prioritizing ways to become more resilient

  3. 0.7-eV GaInAs Junction for a GaInP/GaAs/GaInAs(1eV)/GaInAs(0.7eV) Four-Junction Solar Cell

    SciTech Connect (OSTI)

    Friedman, D. J.; Geisz, J. F.; Norman, A. G.; Wanlass, M. W.; Kurtz, S. R.

    2006-01-01

    We discuss recent developments in III-V multijunction solar cells, focusing on adding a fourth junction to the Ga{sub 0.5}In{sub 0.5} P/GaAs/Ga{sub 0.75}In{sub 0.25}As inverted three-junction cell. This cell, grown inverted on GaAs so that the lattice-mismatched Ga{sub 0.75}In{sub 0.25}As third junction is the last one grown, has demonstrated 38% efficiency, and 40% is likely in the near future. To achieve still further gains, a lower-bandgap Ga{sub x}In{sub 1-x}As fourth junction could be added to the three-junction structure for a four-junction cell whose efficiency could exceed 45% under concentration. Here, we present the initial development of the Ga{sub x}In{sub 1-x}As fourth junction. Junctions of various bandgaps ranging from 0.88 to 0.73 eV were grown, in order to study the effect of the different amounts of lattice mismatch. At a bandgap of 0.88 eV, junctions were obtained with very encouraging {approx}80% quantum efficiency, 57% fill factor, and 0.36 eV open-circuit voltage. The device performance degrades with decreasing bandgap (i.e., increasing lattice mismatch). We model the four-junction device efficiency vs. fourth junction bandgap to show that an 0.7-eV fourth-junction bandgap, while optimal if it could be achieved in practice, is not necessary; an 0.9-eV bandgap would still permit significant gains in multijunction cell efficiency while being easier to achieve than the lower-bandgap junction.

  4. Electron tunneling spectroscopy study of electrically active traps in AlGaN/GaN high electron mobility transistors

    SciTech Connect (OSTI)

    Yang, Jie Cui, Sharon; Ma, T. P.; Hung, Ting-Hsiang; Nath, Digbijoy; Krishnamoorthy, Sriram; Rajan, Siddharth

    2013-11-25

    We investigate the energy levels of electron traps in AlGaN/GaN high electron mobility transistors by the use of electron tunneling spectroscopy. Detailed analysis of a typical spectrum, obtained in a wide gate bias range and with both bias polarities, suggests the existence of electron traps both in the bulk of AlGaN and at the AlGaN/GaN interface. The energy levels of the electron traps have been determined to lie within a 0.5?eV band below the conduction band minimum of AlGaN, and there is strong evidence suggesting that these traps contribute to Frenkel-Poole conduction through the AlGaN barrier.

  5. Fate of hazardous waste derived organic compounds in Lake Ontario

    SciTech Connect (OSTI)

    Jaffe, R.; Hites, R.A.

    1986-03-01

    Dated sediment cores from Lake Ontario's four sedimentation basins and sedentary fish from tributaries and embayments were analyzed by gas chromatographic, methane-enhanced, negative ion mass spectrometry for a group of fluorinated aromatic compounds. The historical record of these chemicals in Lake Ontario sediments agrees well with the use of the Hyde Park dump in the city of Niagara Falls, NY. These compounds first appeared in sediments in 1958 and rapidly increased until 1970. These dates coincide with the onset of dumping at Hyde Park and remedial action undertaken when this dump was closed, respectively. Chemicals introduced into Lake Ontario by the Niagara River distribute throughout the lake rapidly and uniformly and accumulate in sedentary fish taken from remote locations in the lake. 24 references, 9 figures, 4 tables.

  6. Analysis of defects in GaAsN grown by chemical beam epitaxy on high index GaAs substrates

    SciTech Connect (OSTI)

    Bouzazi, Boussairi; Kojima, Nobuaki; Ohshita, Yoshio; Yamaguchi, Masafumi

    2013-09-27

    The lattice defects in GaAsN grown by chemical beam epitaxy on GaAs 311B and GaAs 10A toward [110] were characterized and discussed by using deep level transient spectroscopy (DLTS) and on the basis of temperature dependence of the junction capacitances (C{sub J}). In one hand, GaAsN films grown on GaAs 311B and GaAs 10A showed n-type and p-type conductivities, respectively although the similar and simultaneous growth conditions. This result is indeed in contrast to the common known effect of N concentration on the type of conductivity, since the surface 311B showed a significant improvement in the incorporation of N. Furthermore, the temperature dependence of C{sub J} has shown that GaAs 311B limits the formation of N-H defects. In the other hand, the energy states in the forbidden gap of GaAsN were obtained. Six electron traps, E1 to E6, were observed in the DLTS spectrum of GaAsN grown on GaAs 311B, with apparent activation energies of 0.02, 0.14, 0.16, 0.33, 0.48, and 0.74 eV below the bottom edge of the conduction band, respectively. In addition, four hole traps, H1 to H4, were observed in the DLTS spectrum of GaAsN grown on GaAs 10A, with energy depths of 0.13, 0.20, 0.39, and 0.52 eV above the valence band maximum of the alloy, respectively. Hence, the surface morphology of the GaAs substrate was found to play a key factor role in clarifying the electrical properties of GaAsN grown by CBE.

  7. Photocapacitance study of type-II GaSb/GaAs quantum ring solar cells

    SciTech Connect (OSTI)

    Wagener, M. C.; Botha, J. R.; Carrington, P. J.; Krier, A.

    2014-01-07

    In this study, the density of states associated with the localization of holes in GaSb/GaAs quantum rings are determined by the energy selective charging of the quantum ring distribution. The authors show, using conventional photocapacitance measurements, that the excess charge accumulated within the type-II nanostructures increases with increasing excitation energies for photon energies above 0.9?eV. Optical excitation between the localized hole states and the conduction band is therefore not limited to the ?(k?=?0) point, with pseudo-monochromatic light charging all states lying within the photon energy selected. The energy distribution of the quantum ring states could consequently be accurately related from the excitation dependence of the integrated photocapacitance. The resulting band of localized hole states is shown to be well described by a narrow distribution centered 407?meV above the GaAs valence band maximum.

  8. A InGaN/GaN quantum dot green ({lambda}=524 nm) laser

    SciTech Connect (OSTI)

    Zhang Meng; Banerjee, Animesh; Lee, Chi-Sen; Hinckley, John M.; Bhattacharya, Pallab

    2011-05-30

    The characteristics of self-organized InGaN/GaN quantum dot lasers are reported. The laser heterostructures were grown on c-plane GaN substrates by plasma-assisted molecular beam epitaxy and the laser facets were formed by focused ion beam etching with gallium. Emission above threshold is characterized by a peak at 524 nm (green) and linewidth of 0.7 nm. The lowest measured threshold current density is 1.2 kA/cm{sup 2} at 278 K. The slope and wall plug efficiencies are 0.74 W/A and {approx}1.1%, respectively, at 1.3 kA/cm{sup 2}. The value of T{sub 0}=233 K in the temperature range of 260-300 K.

  9. Efficiency enhancement of InGaN/GaN solar cells with nanostructures

    SciTech Connect (OSTI)

    Bai, J.; Yang, C. C.; Athanasiou, M.; Wang, T.

    2014-02-03

    We demonstrate InGaN/GaN multi-quantum-well solar cells with nanostructures operating at a wavelength of 520?nm. Nanostructures with a periodic nanorod or nanohole array are fabricated by means of modified nanosphere lithography. Under 1 sun air-mass 1.5 global spectrum illumination, a fill factor of 50 and an open circuit voltage of 1.9?V are achieved in spite of very high indium content in InGaN alloys usually causing degradation of crystal quality. Both the nanorod array and the nanohole array significantly improve the performance of solar cells, while a larger enhancement is observed for the nanohole array, where the conversion efficiency is enhanced by 51%.

  10. Graphene in ohmic contact for both n-GaN and p-GaN

    SciTech Connect (OSTI)

    Zhong, Haijian; Liu, Zhenghui; Shi, Lin; Xu, Gengzhao; Fan, Yingmin; Huang, Zengli; Wang, Jianfeng; Ren, Guoqiang; Xu, Ke

    2014-05-26

    The wrinkles of single layer graphene contacted with either n-GaN or p-GaN were found both forming ohmic contacts investigated by conductive atomic force microscopy. The local IV results show that some of the graphene wrinkles act as high-conductive channels and exhibiting ohmic behaviors compared with the flat regions with Schottky characteristics. We have studied the effects of the graphene wrinkles using density-functional-theory calculations. It is found that the standing and folded wrinkles with zigzag or armchair directions have a tendency to decrease or increase the local work function, respectively, pushing the local Fermi level towards n- or p-type GaN and thus improving the transport properties. These results can benefit recent topical researches and applications for graphene as electrode material integrated in various semiconductor devices.

  11. Origins of ion irradiation-induced Ga nanoparticle motion on GaAs surfaces

    SciTech Connect (OSTI)

    Kang, M.; Wu, J. H.; Chen, H. Y.; Thornton, K.; Goldman, R. S. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States)] [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Sofferman, D. L. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States) [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Department of Physics, Adelphi University, Garden City, New York 11530-0701 (United States); Beskin, I. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)] [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)

    2013-08-12

    We have examined the origins of ion irradiation-induced nanoparticle (NP) motion. Focused-ion-beam irradiation of GaAs surfaces induces random walks of Ga NPs, which are biased in the direction opposite to that of ion beam scanning. Although the instantaneous NP velocities are constant, the NP drift velocities are dependent on the off-normal irradiation angle, likely due to a difference in surface non-stoichiometry induced by the irradiation angle dependence of the sputtering yield. It is hypothesized that the random walks are initiated by ion irradiation-induced thermal fluctuations, with biasing driven by anisotropic mass transport.

  12. Photoluminescence studies of individual and few GaSb/GaAs quantum rings

    SciTech Connect (OSTI)

    Young, M. P.; Woodhead, C. S.; Roberts, J.; Noori, Y. J.; Noble, M. T.; Krier, A.; Hayne, M.; Young, R. J.; Smakman, E. P.; Koenraad, P. M.

    2014-11-15

    We present optical studies of individual and few GaSb quantum rings embedded in a GaAs matrix. Contrary to expectation for type-II confinement, we measure rich spectra containing sharp lines. These lines originate from excitonic recombination and are observed to have resolution-limited full-width at half maximum of 200 ?eV. The detail provided by these measurements allows the characteristic type-II blueshift, observed with increasing excitation power, to be studied at the level of individual nanostructures. These findings are in agreement with hole-charging being the origin of the observed blueshift.

  13. Application of the ASME code in the design of the GA-4 and GA-9 casks

    SciTech Connect (OSTI)

    Mings, W.J. ); Koploy, M.A. )

    1992-01-01

    General Atomics (GA) is developing two spent fuel shipping casks for transport by legal weight truck (LWT). The casks are designed to the loading, environmental conditions and safety requirements defined in Title 10 of the Code of Federal Regulations, Part 71 (10CFR71). To ensure that all components of the cask meet the 10CFR71 rules, GA established structural design criteria for each component based on NRC Regulatory Guides and the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code). This paper discusses the criteria used for different cask components, how they were applied and the conservatism and safety margins built into the criteria and assumption.

  14. Application of the ASME code in the design of the GA-4 and GA-9 casks

    SciTech Connect (OSTI)

    Mings, W.J.; Koploy, M.A.

    1992-08-01

    General Atomics (GA) is developing two spent fuel shipping casks for transport by legal weight truck (LWT). The casks are designed to the loading, environmental conditions and safety requirements defined in Title 10 of the Code of Federal Regulations, Part 71 (10CFR71). To ensure that all components of the cask meet the 10CFR71 rules, GA established structural design criteria for each component based on NRC Regulatory Guides and the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code). This paper discusses the criteria used for different cask components, how they were applied and the conservatism and safety margins built into the criteria and assumption.

  15. Temperature dependency of the emission properties from positioned In(Ga)As/GaAs quantum dots

    SciTech Connect (OSTI)

    Braun, T.; Schneider, C.; Maier, S.; Forchel, A.; Höfling, S.; Kamp, M.; Igusa, R.; Iwamoto, S.; Arakawa, Y.

    2014-09-15

    In this letter we study the influence of temperature and excitation power on the emission linewidth from site-controlled InGaAs/GaAs quantum dots grown on nanoholes defined by electron beam lithography and wet chemical etching. We identify thermal electron activation as well as direct exciton loss as the dominant intensity quenching channels. Additionally, we carefully analyze the effects of optical and acoustic phonons as well as close-by defects on the emission linewidth by means of temperature and power dependent micro-photoluminescence on single quantum dots with large pitches.

  16. Assessment of Biomass Energy Opportunities for the Red Lake Band of Chippewa Indians

    SciTech Connect (OSTI)

    Scott Haase

    2005-09-30

    Assessment of biomass energy and biobased product manufacturing opportunities for the Red Lake Tribe.

  17. GaP/Si heterojunction Solar Cells

    SciTech Connect (OSTI)

    Saive, R.; Chen, C.; Emmer, H.; Atwater, H.

    2015-05-11

    Improving the efficiency of solar cells requires the introduction of novel device concepts. Recent developments have shown that in Si solar cell technology there is still room for tremendous improvement. Using the heterojunction with intrinsic thin layer (HIT) approach 25.6 % power conversion efficiency was achieved. However, a-Si as a window and passivation layer comes with disadvantages as a-Si shows low conductivity and high parasitic absorption. Therefore, it is likely that using a crystalline material as window layer with high band gab and high mobility can further improve efficiency. We have studied GaP grown by MOCVD on Si with (001) and (112) orientation. We obtained crystalline layers with carrier mobility around 100 cm2/Vs and which passivate Si as confirmed by carrier lifetime measurements. We performed band alignment studies by X-ray photoelectron spectroscopy yielding a valence band offset of 0.3 eV. Comparing this value with the Schottky-model leads to an interface dipole of 0.59 eV. The open circuit voltage increases with increasing doping and is consistent with the theoretical open circuit voltage deduced from work function difference and interface dipole. We obtain an open circuit voltage of 0.38 V for n-doped GaP with doping levels in the order of 10^17 1/cm^3. In our next steps we will increase the doping level further in order to gain higher open circuit voltage. We will discuss the implications of these findings for GaP/Si heterojunction solar cells.

  18. Distributed bragg reflector using AIGaN/GaN

    DOE Patents [OSTI]

    Waldrip, Karen E.; Lee, Stephen R.; Han, Jung

    2004-08-10

    A supported distributed Bragg reflector or superlattice structure formed from a substrate, a nucleation layer deposited on the substrate, and an interlayer deposited on the nucleation layer, followed by deposition of (Al,Ga,B)N layers or multiple pairs of (Al,Ga,B)N/(Al,Ga,B)N layers, where the interlayer is a material selected from AlN, Al.sub.x Ga.sub.1-x N, and AlBN with a thickness of approximately 20 to 1000 angstroms. The interlayer functions to reduce or eliminate the initial tensile growth stress, thereby reducing cracking in the structure. Multiple interlayers utilized in an AlGaN/GaN DBR structure can eliminate cracking and produce a structure with a reflectivity value greater than 0.99.

  19. TJ Solar Cell (GaInP/GaAs/Ge Ultrahigh-Efficiency Solar Cells

    SciTech Connect (OSTI)

    Friedman, Daniel

    2002-04-17

    This talk will discuss recent developments in III-V multijunction photovoltaic technology which have led to the highest-efficiency solar cells ever demonstrated. The relationship between the materials science of III-V semiconductors and the achievement of record solar cell efficiencies will be emphasized. For instance, epitaxially-grown GAInP has been found to form a spontaneously-ordered GaP/InP (111) superlattice. This ordering affects the band gap of the material, which in turn affects the design of solar cells which incorporate GaInP. For the next generation of ultrahigh-efficiency III-V solar cells, we need a new semiconductor which is lattice-matched to GaAs, has a band gap of 1 eV, and has long minority-carrier diffusion lengths. Out of a number of candidate materials, the recently-discovered alloy GaInNAs appears to have the greatest promise. This material satisfies the first two criteria, but has to date shown very low diffusion lengths, a problem which is our current focus in the development of these next-generation cells.

  20. Multijunction GaInP/GaInAs/Ge solar cells with Bragg reflectors

    SciTech Connect (OSTI)

    Emelyanov, V. M. Kalyuzhniy, N. A.; Mintairov, S. A.; Shvarts, M. Z.; Lantratov, V. M.

    2010-12-15

    Effect of subcell parameters on the efficiency of GaInP/Ga(In)As/Ge tandem solar cells irradiated with 1-MeV electrons at fluences of up to 3 x 10{sup 15} cm{sup -2} has been theoretically studied. The optimal thicknesses of GaInP and GaInAs subcells, which provide the best photocurrent matching at various irradiation doses in solar cells with and without built-in Bragg reflectors, were determined. The dependences of the photoconverter efficiency on the fluence of 1-MeV electrons and on the time of residence in the geostationary orbit were calculated for structures optimized to the beginning and end of their service lives. It is shown that the optimization of the subcell heterostructures for a rated irradiation dose and the introduction of Bragg reflectors into the structure provide a 5% overall increase in efficiency for solar cells operating in the orbit compared with unoptimized cells having no Bragg reflector.

  1. Localized corrosion of GaAs surfaces and formation of porous GaAs

    SciTech Connect (OSTI)

    Schmuki, P.; Vitus, C.M.; Isaacs, H.S.; Fraser, J.; Graham, M.J.

    1995-12-01

    The present work deals with pitting corrosion of p- and n-type GaAs (100). Pit growth can be electrochemically initiated on both conduction types in chloride-containing solutions and leads after extended periods of time to the formation of a porous GaAs structure. In the case of p-type material, localized corrosion is only observed if a passivating film is present on the surface, otherwise -- e.g. in acidic solutions -- the material suffers from a uniform attack (electropolishing) which is independent of the anion present. In contrast, pitting corrosion of n-type material can be triggered independent of the presence of an oxide film. This is explained in terms of the different current limiting factor for the differently doped materials (oxide film in the case of the p- and a space charge layer in the case of the n-GaAs). The porous structure was characterized by SEM, EDX and AES, and consists mainly of GaAs. From scratch experiments it is clear that the pit initiation process is strongly influenced by surface defects. For n-type material, AFM investigations show that light induced roughening of the order of several hundred nm occurs under non-passivating conditions. This nm- scale roughening however does not affect the pitting process.

  2. AlGaAs/InGaAlP tunnel junctions for multijunction solar cells

    SciTech Connect (OSTI)

    SHARPS,P.R.; LI,N.Y.; HILLS,J.S.; HOU,H.; CHANG,PING-CHIH; BACA,ALBERT G.

    2000-05-16

    Optimization of GaInP{sub 2}/GaAs dual and GaInP{sub 2}/GaAs/Ge triple junction cells, and development of future generation monolithic multi-junction cells will involve the development of suitable high bandgap tunnel junctions. There are three criteria that a tunnel junction must meet. First, the resistance of the junction must be kept low enough so that the series resistance of the overall device is not increased. For AMO, 1 sun operation, the tunnel junction resistance should be below 5 x 10{sup {minus}2} {Omega}-cm. Secondly, the peak current density for the tunnel junction must also be larger than the J{sub sc} of the cell so that the tunnel junction I-V curve does not have a deleterious effect on the I-V curve of the multi-junction device. Finally, the tunnel junction must be optically transparent, i.e., there must be a minimum of optical absorption of photons that will be collected by the underlying subcells. The paper reports the investigation of four high bandgap tunnel junctions grown by metal-organic chemical vapor deposition.

  3. High-Efficiency GaInP/GaAs Tandem Solar Cells

    SciTech Connect (OSTI)

    Bertness, K. A.; Friedman, D. J.; Kurtz, S. R.; Kibbler, A. E.; Cramer, C.; Olson, J. M.

    1996-09-01

    GaInP/GaAs tandem solar cells have achieved efficiencies between 25.7-30.2%, depending on illumination conditions. The efficiencies are the highest confirmed two-terminal values measured for any solar cell within each standard illumination category. The monolithic, series-connected design of the tandem cells allows them to be substituted for silicon or gallium arsenide cells in photovoltaic panel systems with minimal design changes. The advantages of using GaInP/GaAs tandem solar cells in space and terrestrial applications are discussed primarily in terms of the reduction in balance-of-system costs that accrues when using a higher efficiency cell. The new efficiency values represent a significant improvement over previous efficiencies for this materials system, and we identify grid design, back interface passivation, and top interface passivation as the three key factors leading to this improvement. In producing the high-efficiency cells, we have addressed nondestructive diagnostics and materials growth reproducibility as well as peak cell performance.

  4. High-efficiency GaInP/GaAs tandem solar cells

    SciTech Connect (OSTI)

    Bertness, K.A.; Friedman, D.J.; Kurtz, S.R.; Kibbler, A.E.; Kramer, C.; Olson, J.M.

    1994-12-01

    GaInP/GaAs tandem solar cells have achieved new record efficiencies, specifically 25.7% under air-mass 0 (AM0) illumination, 29.5% under AM 1.5 global (AM1.5G) illumination, and 30.2% at 140-180x concentration under AM 1.5 direct (AM1.5D) illumination. These values are the highest two-terminal efficiencies achieved by any solar cell under these illumination conditions. The monolithic, series-connected design of the tandem cells allows them to be substituted for silicon or gallium arsenide cells in photovoltaic panel systems with minimal design changes. The advantages of using GaInP/GaAs tandem solar cells in space and terrestrial applications are discussed primarily in terms of the reduction in balance-of-system costs that accrues when using a higher efficiency cell. The new efficiency values represent a significant improvement over previous efficiencies for this materials system, and we identify grid design, back interface passivation, and top interface passivation as the three key factors leading to this improvement. In producing the high-efficiency cells, we have addressed nondestructive diagnostics and materials growth reproducibility as well as peak cell performance. 31 refs.

  5. fe0013961-GaTech | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Performer Georgia Tech Research Corporation, Atlanta GA 30332 Background While earlier research focused on the properties of the hydrate mass per se (Sloan Jr and Koh 2007), ...

  6. Inverse spin Hall effect in Pt/(Ga,Mn)As

    SciTech Connect (OSTI)

    Nakayama, H.; Chen, L.; Chang, H. W.; Ohno, H.; Matsukura, F.

    2015-06-01

    We investigate dc voltages under ferromagnetic resonance in a Pt/(Ga,Mn)As bilayer structure. A part of the observed dc voltage is shown to originate from the inverse spin Hall effect. The sign of the inverse spin Hall voltage is the same as that in Py/Pt bilayer structure, even though the stacking order of ferromagnetic and nonmagnetic layers is opposite to each other. The spin mixing conductance at the Pt/(Ga,Mn)As interface is determined to be of the order of 10{sup 19 }m{sup −2}, which is about ten times greater than that of (Ga,Mn)As/p-GaAs.

  7. Photoluminescence from GaAs nanodisks fabricated by using combination...

    Office of Scientific and Technical Information (OSTI)

    GaAs nanodisks fabricated by using combination of neutral beam etching and atomic hydrogen-assisted molecular beam epitaxy regrowth Citation Details In-Document Search Title:...

  8. Alternative Fuels Data Center: Salt Lake City Fuels Vehicles With Natural

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    Gas Salt Lake City Fuels Vehicles With Natural Gas to someone by E-mail Share Alternative Fuels Data Center: Salt Lake City Fuels Vehicles With Natural Gas on Facebook Tweet about Alternative Fuels Data Center: Salt Lake City Fuels Vehicles With Natural Gas on Twitter Bookmark Alternative Fuels Data Center: Salt Lake City Fuels Vehicles With Natural Gas on Google Bookmark Alternative Fuels Data Center: Salt Lake City Fuels Vehicles With Natural Gas on Delicious Rank Alternative Fuels Data

  9. Deep level defects in n-type GaAsBi and GaAs grown at low temperatures

    SciTech Connect (OSTI)

    Mooney, P. M.; Watkins, K. P.; Jiang, Zenan; Basile, A. F.; Lewis, R. B.; Bahrami-Yekta, V.; Masnadi-Shirazi, M.; Beaton, D. A.; Tiedje, T.

    2013-04-07

    Deep level defects in n-type GaAs{sub 1-x}Bi{sub x} having 0 < x < 0.012 and GaAs grown by molecular beam epitaxy (MBE) at substrate temperatures between 300 and 400 Degree-Sign C have been investigated by Deep Level Capacitance Spectroscopy. Incorporating Bi suppresses the formation of an electron trap with activation energy 0.40 eV, thus reducing the total trap concentration in dilute GaAsBi layers by more than a factor of 20 compared to GaAs grown under the same conditions. We find that the dominant traps in dilute GaAsBi layers are defect complexes involving As{sub Ga}, as expected for MBE growth at these temperatures.

  10. Room-temperature mid-infrared "M"-type GaAsSb/InGaAs quantum well

    Office of Scientific and Technical Information (OSTI)

    lasers on InP substrate (Journal Article) | SciTech Connect Room-temperature mid-infrared "M"-type GaAsSb/InGaAs quantum well lasers on InP substrate Citation Details In-Document Search Title: Room-temperature mid-infrared "M"-type GaAsSb/InGaAs quantum well lasers on InP substrate We have demonstrated experimentally the InP-based "M"-type GaAsSb/InGaAs quantum-well (QW) laser lasing at 2.41 μm at room temperature by optical pumping. The threshold power density

  11. Au impact on GaAs epitaxial growth on GaAs (111){sub B} substrates in molecular beam epitaxy

    SciTech Connect (OSTI)

    Liao, Zhi-Ming; Chen, Zhi-Gang; Xu, Hong-Yi; Guo, Ya-Nan; Sun, Wen; Zhang, Zhi; Yang, Lei; Lu, Zhen-Yu; Chen, Ping-Ping; Lu, Wei; Zou, Jin; Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Queensland 4072

    2013-02-11

    GaAs growth behaviour under the presence of Au nanoparticles on GaAs {l_brace}111{r_brace}{sub B} substrate is investigated using electron microscopy. It has been found that, during annealing, enhanced Ga surface diffusion towards Au nanoparticles leads to the GaAs epitaxial growth into {l_brace}113{r_brace}{sub B} faceted triangular pyramids under Au nanoparticles, governed by the thermodynamic growth, while during conventional GaAs growth, growth kinetics dominates, resulting in the flatted triangular pyramids at high temperature and the epitaxial nanowires growth at relatively low temperature. This study provides an insight of Au nanoparticle impact on GaAs growth, which is critical for understanding the formation mechanisms of semiconductor nanowires.

  12. Deep level centers and their role in photoconductivity transients of InGaAs/GaAs quantum dot chains

    SciTech Connect (OSTI)

    Kondratenko, S. V. Vakulenko, O. V.; Mazur, Yu. I. Dorogan, V. G.; Marega, E.; Benamara, M.; Ware, M. E.; Salamo, G. J.

    2014-11-21

    The in-plane photoconductivity and photoluminescence are investigated in quantum dot-chain InGaAs/GaAs heterostructures. Different photoconductivity transients resulting from spectrally selecting photoexcitation of InGaAs QDs, GaAs spacers, or EL2 centers were observed. Persistent photoconductivity was observed at 80?K after excitation of electron-hole pairs due to interband transitions in both the InGaAs QDs and the GaAs matrix. Giant optically induced quenching of in-plane conductivity driven by recharging of EL2 centers is observed in the spectral range from 0.83?eV to 1.0?eV. Conductivity loss under photoexcitation is discussed in terms of carrier localization by analogy with carrier distribution in disordered media.

  13. Comparative analysis of discharges into Lake Michigan, Phase I - Southern Lake Michigan.

    SciTech Connect (OSTI)

    Veil, J. A.; Elcock, D.; Gasper, J. R.; Environmental Science Division

    2008-06-30

    BP Products North America Inc. (BP) owns and operates a petroleum refinery located on approximately 1,700 acres in Whiting, East Chicago, and Hammond, Indiana, near the southern tip of Lake Michigan. BP provided funding to Purdue University-Calumet Water Institute (Purdue) and Argonne National Laboratory (Argonne) to conduct studies related to wastewater treatment and discharges. Purdue and Argonne are working jointly to identify and characterize technologies that BP could use to meet the previous discharge permit limits for total suspended solids (TSS) and ammonia after refinery modernization. In addition to the technology characterization work, Argonne conducted a separate project task, which is the subject of this report. In Phase I of a two-part study, Argonne estimated the current levels of discharge to southern Lake Michigan from significant point and nonpoint sources in Illinois, Indiana, and portions of Michigan. The study does not consider all of the chemicals that are discharged. Rather, it is narrowly focused on a selected group of pollutants, referred to as the 'target pollutants'. These include: TSS, ammonia, total and hexavalent chromium, mercury, vanadium, and selenium. In Phase II of the study, Argonne will expand the analysis to cover the entire Lake Michigan drainage basin.

  14. An inverted AlGaAs/GaAs patterned-Ge tunnel junction cascade concentrator solar cell

    SciTech Connect (OSTI)

    Venkatasubramanian, R. )

    1993-01-01

    This report describes work to develop inverted-grown Al[sub 0.34]Ga[sub 0.66]As/GaAs cascades. Several significant developments are reported on as follows: (1) The AM1.5 1-sun total-area efficiency of the top Al[sub 0.34]Ga[sub 0.66]As cell for the cascade was improved from 11.3% to 13.2% (NREL measurement [total-area]). (2) The cycled'' organometallic vapor phase epitaxy growth (OMVPE) was studied in detail utilizing a combination of characterization techniques including Hall-data, photoluminescence, and secondary ion mass spectroscopy. (3) A technique called eutectic-metal-bonding (EMB) was developed by strain-free mounting of thin GaAs-AlGaAs films (based on lattice-matched growth on Ge substrates and selective plasma etching of Ge substrates) onto Si carrier substrates. Minority-carrier lifetime in an EMB GaAs double-heterostructure was measured as high as 103 nsec, the highest lifetime report for a freestanding GaAs thin film. (4) A thin-film, inverted-grown GaAs cell with a 1-sun AM1.5 active-area efficiency of 20.3% was obtained. This cell was eutectic-metal-bonded onto Si. (5) A thin-film inverted-grown, Al[sub 0.34]Ga[sub 0.66]As/GaAs cascade with AM1.5 efficiency of 19.9% and 21% at 1-sun and 7-suns, respectively, was obtained. This represents an important milestone in the development of an AlGaAs/GaAs cascade by OMVPE utilizing a tunnel interconnect and demonstrates a proof-of-concept for the inverted-growth approach.

  15. Growth and Band Offsets of Epitaxial Lanthanide Oxides on GaN and AlGaN.

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect Growth and Band Offsets of Epitaxial Lanthanide Oxides on GaN and AlGaN. Citation Details In-Document Search Title: Growth and Band Offsets of Epitaxial Lanthanide Oxides on GaN and AlGaN. Abstract not provided. Authors: Ihlefeld, Jon ; Brumbach, Michael T. ; Allerman, Andrew A. ; Wheeler, David Roger ; Atcitty, Stanley Publication Date: 2015-01-01 OSTI Identifier: 1244879 Report Number(s): SAND2015-0073C 558329 DOE Contract Number: AC04-94AL85000 Resource

  16. DC characteristics of OMVPE-grown N-p-n InGaP/InGaAsN DHBTs

    SciTech Connect (OSTI)

    Li, N.Y.; Chang, P.C.; Baca, A.G.; Xie, X.M.; Sharps, P.R.; Hou, H.Q.

    2000-01-04

    The authors demonstrate, for the first time, a functional N-p-n heterojunction bipolar transistor using a novel material, InGaAsN, with a bandgap energy of 1.2eV as the p-type base layer. A 300{angstrom}-thick In{sub x}Ga{sub 1-x}As graded layer was introduced to reduce the conduction band offset at the p-type InGaAsN base and n-type GaAs collector junction. For an emitter size of 500 {mu}m{sup 2}, a peak current gain of 5.3 has been achieved.

  17. Reliability of AlGaN/GaN high electron mobility transistors on low dislocation density bulk GaN substrate: Implications of surface step edges

    SciTech Connect (OSTI)

    Killat, N. E-mail: Martin.Kuball@bristol.ac.uk; Montes Bajo, M.; Kuball, M. E-mail: Martin.Kuball@bristol.ac.uk; Paskova, T.; Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695 ; Evans, K. R.; Leach, J.; Electrical and Computer Engineering Department, Virginia Commonwealth University, Richmond, Virginia 23284 ; Li, X.; Özgür, Ü.; Morkoç, H.; Chabak, K. D.; Crespo, A.; Gillespie, J. K.; Fitch, R.; Kossler, M.; Walker, D. E.; Trejo, M.; Via, G. D.; Blevins, J. D.

    2013-11-04

    To enable gaining insight into degradation mechanisms of AlGaN/GaN high electron mobility transistors, devices grown on a low-dislocation-density bulk-GaN substrate were studied. Gate leakage current and electroluminescence (EL) monitoring revealed a progressive appearance of EL spots during off-state stress which signify the generation of gate current leakage paths. Atomic force microscopy evidenced the formation of semiconductor surface pits at the failure location, which corresponds to the interaction region of the gate contact edge and the edges of surface steps.

  18. A monolithic white LED with an active region based on InGaN QWs separated by short-period InGaN/GaN superlattices

    SciTech Connect (OSTI)

    Tsatsulnikov, A. F. Lundin, W. V.; Sakharov, A. V.; Zavarin, E. E.; Usov, S. O.; Nikolaev, A. E.; Kryzhanovskaya, N. V.; Synitsin, M. A.; Sizov, V. S.; Zakgeim, A. L.; Mizerov, M. N.

    2010-06-15

    A new approach to development of effective monolithic white-light emitters is described based on using a short-period InGaN/GaN superlattice as a barrier layer in the active region of LED structures between InGaN quantum wells emitting in the blue and yellow-green spectral ranges. The optical properties of structures of this kind have been studied, and it is demonstrated that the use of such a superlattice makes it possible to obtain effective emission from the active region.

  19. Category:Salt Lake City, UT | Open Energy Information

    Open Energy Info (EERE)

    UT Jump to: navigation, search Go Back to PV Economics By Location Media in category "Salt Lake City, UT" The following 16 files are in this category, out of 16 total....

  20. Lake Nacimiento, California: Energy Resources | Open Energy Informatio...

    Open Energy Info (EERE)

    You can help OpenEI by expanding it. Lake Nacimiento is a census-designated place in San Luis Obispo County, California.1 References US Census Bureau 2005 Place to 2006...

  1. Climate Action Champions: Salt Lake City, UT | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    decreasing total building energy use in the City by 5 percent, and generating 10 megawatts of solar energy in the community by 2015. In addition, Salt Lake City aims to reduce ...

  2. Lake Quivira, Kansas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    This article is a stub. You can help OpenEI by expanding it. Lake Quivira is a city in Johnson County and Wyandotte County, Kansas. It falls under Kansas's 3rd congressional...

  3. Lake Meade, Pennsylvania: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    a stub. You can help OpenEI by expanding it. Lake Meade is a census-designated place in Adams County, Pennsylvania.1 References US Census Bureau 2005 Place to 2006 CBSA...

  4. Lake Heritage, Pennsylvania: Energy Resources | Open Energy Informatio...

    Open Energy Info (EERE)

    You can help OpenEI by expanding it. Lake Heritage is a census-designated place in Adams County, Pennsylvania.1 References US Census Bureau 2005 Place to 2006 CBSA...

  5. Vermont Individual Lake Encroachment Permit | Open Energy Information

    Open Energy Info (EERE)

    Abstract Submission of this application required for notice of intent to encroach beyond the mean water level of a lake or pond, and certify that the project will comply with...

  6. Big Bear Lake, California: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Big Bear Lake is a city in San Bernardino County, California. It falls under California's...

  7. City of Lake City, Minnesota (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Place: Minnesota Phone Number: (651) 345 - 5383 (8am to 4:30pm weekdays) Website: www.ci.lake-city.mn.usindex.a Outage Hotline: After Hours: (651) 345 - 4711 or (651) 345 -...

  8. MHK Projects/Lake Huron | Open Energy Information

    Open Energy Info (EERE)

    during July-August 2005 in Lake Huron. The rest of the rig was developed to mimic the action of the hydraulic system and provide the opportunity to take various measurements to...

  9. Moon Lake Electric Assn Inc (Utah) | Open Energy Information

    Open Energy Info (EERE)

    search Name: Moon Lake Electric Assn Inc Place: Utah Phone Number: ALTAMONT OFFICE (435) 454-3611 -- DUCHESNE OFFICE (435) 738-5322 -- RANGELY OFFICE (970) 675-2291 --...

  10. City of Shasta Lake Electric Utility- PV Rebate Program

    Broader source: Energy.gov [DOE]

    City of Shasta Lake Electric Utility is providing rebates to their customers for the purchase of photovoltaic (PV) systems. The rebate levels will decrease annually over the life of the program. ...

  11. Prior Lake, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    This article is a stub. You can help OpenEI by expanding it. Prior Lake is a city in Scott County, Minnesota. It falls under Minnesota's 2nd congressional district.12...

  12. Emerald Lake Hills, California: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Emerald Lake Hills is a census-designated place in San Mateo County, California.1...

  13. White Meadow Lake, New Jersey: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. White Meadow Lake is a census-designated place in Morris County, New Jersey.1 References...

  14. Seven Lakes, North Carolina: Energy Resources | Open Energy Informatio...

    Open Energy Info (EERE)

    stub. You can help OpenEI by expanding it. Seven Lakes is a census-designated place in Moore County, North Carolina.1 References US Census Bureau 2005 Place to 2006 CBSA...

  15. Static Temperature Survey At Lake City Hot Springs Area (Benoit...

    Open Energy Info (EERE)

    Notes Two deeper wells encountered temps of 327 and 329 oF References Dick Benoit, Joe Moore, Colin Goranson, David Blackwell (2005) Core Hole Drilling And Testing At The Lake...

  16. Medicine Lake, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Medicine Lake is a city in Hennepin County, Minnesota. It falls under Minnesota's 3rd...

  17. DOE - Office of Legacy Management -- Salt Lake City Vitro Chemical...

    Office of Legacy Management (LM)

    Vitro Chemical - UT 0-04 FUSRAP Considered Sites Site: Salt Lake City Vitro Chemical (UT.0-04 ) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site ...

  18. Sky Lake, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Sky Lake is a census-designated place in Orange County, Florida.1 References US...

  19. China Lake Acres, California: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. China Lake Acres is a census-designated place in Kern County, California.1 References ...

  20. Blue Lake, California: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Blue Lake is a city in Humboldt County, California. It falls under California's 1st...

  1. Egypt Lake-Leto, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Egypt Lake-Leto is a census-designated place in Hillsborough County, Florida.1 References...

  2. Cottage Lake, Washington: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    stub. You can help OpenEI by expanding it. Cottage Lake is a census-designated place in King County, Washington.1 References US Census Bureau 2005 Place to 2006 CBSA...

  3. Ames Lake, Washington: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    a stub. You can help OpenEI by expanding it. Ames Lake is a census-designated place in King County, Washington.1 References US Census Bureau 2005 Place to 2006 CBSA...

  4. Lake Marcel-Stillwater, Washington: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    can help OpenEI by expanding it. Lake Marcel-Stillwater is a census-designated place in King County, Washington.1 References US Census Bureau 2005 Place to 2006 CBSA...

  5. Lake Forest Park, Washington: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    article is a stub. You can help OpenEI by expanding it. Lake Forest Park is a city in King County, Washington. It falls under Washington's 1st congressional district and...

  6. Lake Morton-Berrydale, Washington: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    can help OpenEI by expanding it. Lake Morton-Berrydale is a census-designated place in King County, Washington.1 References US Census Bureau 2005 Place to 2006 CBSA...

  7. Maple Heights-Lake Desire, Washington: Energy Resources | Open...

    Open Energy Info (EERE)

    help OpenEI by expanding it. Maple Heights-Lake Desire is a census-designated place in King County, Washington.1 References US Census Bureau 2005 Place to 2006 CBSA...

  8. Storm Lake, Iowa: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    article is a stub. You can help OpenEI by expanding it. Storm Lake is a city in Buena Vista County, Iowa. It falls under Iowa's 5th congressional district.12 Registered...

  9. Lake Lahontan: Geology of Southern Carson Desert, Nevada | Open...

    Open Energy Info (EERE)

    with the soil of pre-Tahoe age (of Blackwelder, 1931) in the Sierra Nevada; the Churchill soil is correlated with the middle Lake Bonneville soil and with the soil of inter-Tahoe...

  10. West Lake Hills, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. West Lake Hills is a city in Travis County, Texas. It falls under Texas's 10th congressional...

  11. Spring Lake, Michigan: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Spring Lake is a village in Ottawa County, Michigan. It falls under Michigan's 2nd...

  12. Spring Lake, Utah: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Spring Lake is a census-designated place in Utah County, Utah.1 References US Census...

  13. Red Feather Lakes, Colorado: Energy Resources | Open Energy Informatio...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Red Feather Lakes is a census-designated place in Larimer County, Colorado.1 References...

  14. Red Lake County, Minnesota: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Red Lake County is a county in Minnesota. Its FIPS County Code is 125. It is classified as...

  15. Changing Weather and Climate in the Great Lakes Region

    Broader source: Energy.gov [DOE]

    This 4-week course will feature a new season each week through short lectures and activities covering Great Lakes weather, observed changes in the climate, and societal impacts of climate change....

  16. Avon Lake, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Avon Lake is a city in Lorain County, Ohio. It falls under Ohio's 13th congressional...

  17. Thermokarst lake methanogenesis along a complete talik profile

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Heslop, J. K.; Walter Anthony, K. M.; Sepulveda-Jauregui, A.; Martinez-Cruz, K.; Bondurant, A.; Grosse, G.; Jones, M. C.

    2015-07-24

    Thermokarst (thaw) lakes emit methane (CH4) to the atmosphere formed from thawed permafrost organic matter (OM), but the relative magnitude of CH4 production in surface lake sediments vs. deeper thawed permafrost horizons is not well understood. We assessed anaerobic CH4 production potentials from various depths along a 590 cm long lake sediment core that captured the entire sediment package of the talik (thaw bulb) beneath the center of an interior Alaska thermokarst lake, Vault Lake, and the top 40 cm of thawing permafrost beneath the talik. We also studied the adjacent Vault Creek permafrost tunnel that extends through ice-rich yedomamore » permafrost soils surrounding the lake and into underlying gravel. Our results showed CH4 production potentials were highest in the organic-rich surface lake sediments, which were 151 cm thick (mean ± SD: 5.95 ± 1.67 μg C–CH4 g dw-1 d-1; 125.9 ± 36.2 μg C–CH4 g C−1org d-1). High CH4 production potentials were also observed in recently thawed permafrost (1.18 ± 0.61 μg C–CH4g dw-1 d-1; 59.60± 51.5 μg C–CH4 g C−1org d-1) at the bottom of the talik, but the narrow thicknesses (43 cm) of this horizon limited its overall contribution to total sediment column CH4 production in the core. Lower rates of CH4 production were observed in sediment horizons representing permafrost that has been thawing in the talik for a longer period of time. No CH4 production was observed in samples obtained from the permafrost tunnel, a non-lake environment. Our findings imply that CH4 production is highly variable in thermokarst lake systems and that both modern OM supplied to surface sediments and ancient OM supplied to both surface and deep lake sediments by in situ thaw and shore erosion of yedoma permafrost are important to lake CH4 production.« less

  18. Thermokarst-lake methanogenesis along a complete talik profile

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Heslop, J. K.; Walter Anthony, K. M.; Sepulveda-Jauregui, A.; Martinez-Cruz, K.; Bondurant, A.; Grosse, G.; Jones, M. C.

    2015-03-24

    Thermokarst (thaw) lakes emit methane (CH4) to the atmosphere formed from thawed permafrost organic matter (OM), but the relative magnitude of CH4 production in surface lake sediments vs. deeper thawed permafrost horizons is not well understood. We assessed anaerobic CH4 production potentials from various depths along a 590 cm long lake sediment core that captured the entire sediment package of the talik (thaw bulb) beneath the center of an interior Alaska thermokarst lake, Vault Lake, and the top 40 cm of thawing permafrost beneath the talik. We also studied the adjacent Vault Creek permafrost tunnel that extends through ice-rich yedomamore » permafrost soils surrounding the lake and into underlying gravel. Our results showed CH4 production potentials were highest in the organic-rich surface lake sediments, which were 151 cm thick (mean ± SD 5.95 ± 1.67 μg C-CH4 g dw-1 d-1; 125.9± 36.2 μg C-CH4 g C-1org d-1). High CH4 production potentials were also observed in recently-thawed permafrost (1.18± 0.61 μg C-CH4g dw-1 d-1; 59.60± 51.5 μg C-CH4 g C-1org d-1) at the bottom of the talik, but the narrow thicknesses (43 cm) of this horizon limited its overall contribution to total sediment column CH4 production in the core. Lower rates of CH4 production were observed in sediment horizons representing permafrost that has been thawed in the talik for longer periods of time. No CH4 production was observed in samples obtained from the permafrost tunnel, a non-lake environment. Our findings imply that CH4 production is highly variable in thermokarst-lake systems and that both modern OM supplied to surface sediments and ancient OM supplied to both surface and deep lake sediments by in situ thaw as well as shore erosion of yedoma permafrost are important to lake CH4 production.« less

  19. Kootznoowoos Thayer Lake Hydroelectric Update

    Energy Savers [EERE]

    Kootznoowoo's Thayer Lake Hydroelectric Update U.S. Department of Energy November 17, 2009 Tribal Energy Program Thayer Lake Report  Brief Summary of Tribe  Project Overview - video  Accomplishments  Lessons Learned  Activities Yet to Be Completed  Future Plans Angoon  Angoon and its people  Time immemorial  Only year round community in wilderness and monument  400 residents with potential to grow  Current spot demand of 600 kW  Commercial Rate unsubsidized

  20. Obama Administration and Great Lakes States Announce Agreement to Spur

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Development of Offshore Wind Projects | Department of Energy and Great Lakes States Announce Agreement to Spur Development of Offshore Wind Projects Obama Administration and Great Lakes States Announce Agreement to Spur Development of Offshore Wind Projects March 30, 2012 - 12:00pm Addthis Washington, D.C. - As part of President Obama's all of the above approach to energy, the Obama Administration today joined with the governors of Illinois, Michigan, Minnesota, New York and Pennsylvania to

  1. Energy Department Supports Efficiency Upgrades in Alaska's Lake and

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Peninsula Borough | Department of Energy Supports Efficiency Upgrades in Alaska's Lake and Peninsula Borough Energy Department Supports Efficiency Upgrades in Alaska's Lake and Peninsula Borough March 24, 2016 - 4:48pm Addthis Insulation is a key element of weatherization because it provides resistance to heat flow which lowers a family’s heating and cooling costs. Insulation is especially important for homes in arctic climates, like this home in Alaska. The Energy Department's

  2. 05684ArcticLakes | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Using Artificial Barriers to Augment Fresh Water Supplies in Shallow Arctic Lakes Last Reviewed 6/26/2013 DE-NT0005684 Goal The goal of this project is to implement a snow control practice to enhance snow drift formation as a local water source to recharge a depleted lake despite possible unfavorable climate and hydrology preconditions (i.e., surface storage deficit and/or low precipitation). Performer University of Alaska Fairbanks, Fairbanks, AK Background Snow is central to activities in

  3. Photoeffects in WO{sub 3}/GaAs electrode

    SciTech Connect (OSTI)

    Yoon, K.H.; Lee, J.W.; Cho, Y.S.; Kang, D.H.

    1996-12-01

    Photoeffects of a {ital p}-type GaAs coated with WO{sub 3} thin film have been investigated as a function of film thickness and photoresponse transients of the WO{sub 3}/GaAs electrode were studied. Also, these results were compared to those for a single {ital p}-type GaAs electrode. The photocurrent of the WO{sub 3}/GaAs electrode depended on the film thickness of the WO{sub 3}, showing an optimum photon efficiency for specimens of 800 A thickness. This is due to the existence of an effective interface state within the band gap which reduces trapping of carriers and facilitates carrier movement. For an 800-A-thick WO{sub 3} thin film deposited {ital p}-GaAs photoelectrode, the photogenerated electrons were found to move to an electrolyte at a higher positive onset potential compared with that of single {ital p}-type GaAs, which was confirmed as a result of transient behavior. {ital I}{endash}{ital V} and {ital C}{endash}{ital V} characteristics of the WO{sub 3}/GaAs electrode were also compared with those of a single {ital p}-type GaAs electrode. {copyright} {ital 1996 American Institute of Physics.}

  4. Long-wavelength shift and enhanced room temperature photoluminescence efficiency in GaAsSb/InGaAs/GaAs-based heterostructures emitting in the spectral range of 1.01.2??m due to increased charge carrier's localization

    SciTech Connect (OSTI)

    Kryzhkov, D. I. Yablonsky, A. N.; Morozov, S. V.; Aleshkin, V. Ya.; Krasilnik, Z. F.; Zvonkov, B. N.; Vikhrova, O. V.

    2014-11-28

    In this work, a study of the photoluminescence (PL) temperature dependence in quantum well GaAs/GaAsSb and double quantum well InGaAs/GaAsSb/GaAs heterostructures grown by metalorganic chemical vapor deposition with different parameters of GaAsSb and InGaAs layers has been performed. It has been demonstrated that in double quantum well InGaAs/GaAsSb/GaAs heterostructures, a significant shift of the PL peak to a longer-wavelength region (up to 1.2??m) and a considerable reduction in the PL thermal quenching in comparison with GaAs/GaAsSb structures can be obtained due to better localization of charge carriers in the double quantum well. For InGaAs/GaAsSb/GaAs heterostructures, an additional channel of radiative recombination with participation of the excited energy states in the quantum well, competing with the main ground-state radiative transition, has been revealed.

  5. Growth of GaN@InGaN Core-Shell and Au-GaN Hybrid Nanostructures for Energy Applications

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kuykendall, Tevye; Aloni, Shaul; Jen-La Plante, Ilan; Mokari, Taleb

    2009-01-01

    We demonstrated a method to control the bandgap energy of GaN nanowires by forming GaN@InGaN core-shell hybrid structures using metal organic chemical vapor deposition (MOCVD). Furthermore, we show the growth of Au nanoparticles on the surface of GaN nanowires in solution at room temperature. The work shown here is a first step toward engineering properties that are crucial for the rational design and synthesis of a new class of photocatalytic materials. The hybrid structures were characterized by various techniques, including photoluminescence (PL), energy dispersive x-ray spectroscopy (EDS), transmission and scanning electron microscopy (TEM and SEM), and x-ray diffraction (XRD).

  6. Sidewall passivation for InGaN/GaN nanopillar light emitting diodes

    SciTech Connect (OSTI)

    Choi, Won Hyuck; Abraham, Michael; Yu, Shih-Ying [Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); You, Guanjun; Liu, Jie; Wang, Li; Xu, Jian, E-mail: jianxu@engr.psu.edu [Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Mohney, Suzanne E., E-mail: mohney@ems.psu.edu [Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

    2014-07-07

    We studied the effect of sidewall passivation on InGaN/GaN multiquantum well-based nanopillar light emitting diode (LED) performance. In this research, the effects of varying etch rate, KOH treatment, and sulfur passivation were studied for reducing nanopillar sidewall damage and improving device efficiency. Nanopillars prepared under optimal etching conditions showed higher photoluminescence intensity compared with starting planar epilayers. Furthermore, nanopillar LEDs with and without sulfur passivation were compared through electrical and optical characterization. Suppressed leakage current under reverse bias and four times higher electroluminescence (EL) intensity were observed for passivated nanopillar LEDs compared with unpassivated nanopillar LEDs. The suppressed leakage current and EL intensity enhancement reflect the reduction of non-radiative recombination at the nanopillar sidewalls. In addition, the effect of sulfur passivation was found to be very stable, and further insight into its mechanism was gained through transmission electron microscopy.

  7. Ultrafast dynamics of type-II GaSb/GaAs quantum dots

    SciTech Connect (OSTI)

    Komolibus, K.; Piwonski, T.; Gradkowski, K.; Reyner, C. J.; Liang, B.; Huffaker, D. L.; Huyet, G.; Houlihan, J.

    2015-01-19

    In this paper, room temperature two-colour pump-probe spectroscopy is employed to study ultrafast carrier dynamics in type-II GaSb/GaAs quantum dots. Our results demonstrate a strong dependency of carrier capture/escape processes on applied reverse bias voltage, probing wavelength and number of injected carriers. The extracted timescales as a function of both forward and reverse bias may provide important information for the design of efficient solar cells and quantum dot memories based on this material. The first few picoseconds of the dynamics reveal a complex behaviour with an interesting feature, which does not appear in devices based on type-I materials, and hence is linked to the unique carrier capture/escape processes possible in type-II structures.

  8. Large linear magnetoresistance in a GaAs/AlGaAs heterostructure

    SciTech Connect (OSTI)

    Aamir, Mohammed Ali, E-mail: aamir@physics.iisc.ernet.in; Goswami, Srijit, E-mail: aamir@physics.iisc.ernet.in; Ghosh, Arindam [Department of Physics, Indian Institute of Science, Bangalore 560 012 (India); Baenninger, Matthias; Farrer, Ian; Ritchie, David A. [Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Tripathi, Vikram [Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India); Pepper, Michael [Department of Electrical and Electronic Engineering, University College, London WC1E 7JE (United Kingdom)

    2013-12-04

    We report non-saturating linear magnetoresistance (MR) in a two-dimensional electron system (2DES) at a GaAs/AlGaAs heterointerface in the strongly insulating regime. We achieve this by driving the gate voltage below the pinch-off point of the device and operating it in the non-equilibrium regime with high source-drain bias. Remarkably, the magnitude of MR is as large as 500% per Tesla with respect to resistance at zero magnetic field, thus dwarfing most non-magnetic materials which exhibit this linearity. Its primary advantage over most other materials is that both linearity and the enormous magnitude are retained over a broad temperature range (0.3 K to 10 K), thus making it an attractive candidate for cryogenic sensor applications.

  9. Room temperature spin transport in undoped (110) GaAs/AlGaAs quantum wells

    SciTech Connect (OSTI)

    Yokota, Nobuhide Aoshima, Yohei; Ikeda, Kazuhiro; Kawaguchi, Hitoshi

    2014-02-17

    We are reporting on our first observation of a micrometer-order electron spin transport in a (110) GaAs/AlGaAs multiple quantum well (QW) at room temperature using a space- and time-resolved Kerr rotation technique. A 37-μm transport was observed within an electron spin lifetime of 1.2 ns at room temperature when using an in-plane electric field of 1.75 kV/cm. The spatio-temporal profiles of electron spins were well reproduced by the spin drift-diffusion equations coupled with the Poisson equation, supporting the validity of the measurement. The results suggest that (110) QWs are useful as a spin transport layer for semiconductor spintronic devices operating at room temperature.

  10. Evaluation of the two-photon absorption characteristics of GaSb/GaAs quantum rings

    SciTech Connect (OSTI)

    Wagener, M. C.; Botha, J. R.; Carrington, P. J.; Krier, A.

    2014-07-28

    The optical parameters describing the sub-bandgap response of GaSb/GaAs quantum rings solar cells have been obtained from photocurrent measurements using a modulated pseudo-monochromatic light source in combination with a second, continuous photo-filling source. By controlling the charge state of the quantum rings, the photoemission cross-sections describing the two-photon sub-bandgap transitions could be determined independently. Temperature dependent photo-response measurements also revealed that the barrier for thermal hole emission from the quantum rings is significantly below the quantum ring localisation energy. The temperature dependence of the sub-bandgap photo-response of the solar cell is also described in terms of the photo- and thermal-emission characteristics of the quantum rings.

  11. Elastic properties of Pu metal and Pu-Ga alloys

    SciTech Connect (OSTI)

    Soderlind, P; Landa, A; Klepeis, J E; Suzuki, Y; Migliori, A

    2010-01-05

    We present elastic properties, theoretical and experimental, of Pu metal and Pu-Ga ({delta}) alloys together with ab initio equilibrium equation-of-state for these systems. For the theoretical treatment we employ density-functional theory in conjunction with spin-orbit coupling and orbital polarization for the metal and coherent-potential approximation for the alloys. Pu and Pu-Ga alloys are also investigated experimentally using resonant ultrasound spectroscopy. We show that orbital correlations become more important proceeding from {alpha} {yields} {beta} {yields} {gamma} plutonium, thus suggesting increasing f-electron correlation (localization). For the {delta}-Pu-Ga alloys we find a softening with larger Ga content, i.e., atomic volume, bulk modulus, and elastic constants, suggest a weakened chemical bonding with addition of Ga. Our measurements confirm qualitatively the theory but uncertainties remain when comparing the model with experiments.

  12. EIS-0099: Remedial Actions at the Former Vitro Chemical Company Site, South Salt Lake, Salt Lake County, Utah

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy developed this statement to evaluate the environmental impacts of various scenarios associated with the cleanup of those residues remaining at the abandoned uranium mill tailings site located in South Salt Lake, Utah.

  13. Reactive codoping of GaAlInP compound semiconductors (Patent...

    Office of Scientific and Technical Information (OSTI)

    Patent: Reactive codoping of GaAlInP compound semiconductors Citation Details In-Document Search Title: Reactive codoping of GaAlInP compound semiconductors A GaAlInP compound ...

  14. Germanium subcells for multijunction GaInP/GaInAs/Ge solar cells

    SciTech Connect (OSTI)

    Kalyuzhnyy, N. A.; Gudovskikh, A. S.; Evstropov, V. V.; Lantratov, V. M.; Mintairov, S. A.; Timoshina, N. Kh.; Shvarts, M. Z.; Andreev, V. M.

    2010-11-15

    Photovoltaic converters based on n-GaInP/n-p-Ge heterostructures grown by the OMVPE under different conditions of formation of the p-n junction are studied. The heterostructures are intended for use as narrow-gap subcells of the GaInP/GaInAs/Ge three-junction solar cells. It is shown that, in Ge p-tn junctions, along with the diffusion mechanism, the tunneling mechanism of the current flow exists; therefore, the two-diode electrical equivalent circuit of the Ge p-n junction is used. The diode parameters are determined for both mechanisms from the analysis of both dark and 'light' current-voltage dependences. It is shown that the elimination of the component of the tunneling current allows one to increase the efficiency of the Ge subcell by {approx}1% with conversion of nonconcentrated solar radiation. The influence of the tunneling current on the efficiency of the Ge-based devices can be in practice reduced to zero at photogenerated current density of {approx}1.5 A/cm{sup 2} due to the use of the concentrated solar radiation.

  15. Thermal Design and Characterization of Heterogeneously Integrated InGaP/GaAs HBTs

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Choi, Sukwon; Peake, Gregory M.; Keeler, Gordon A.; Geib, Kent M.; Briggs, Ronald D.; Beechem, Thomas E.; Shaffer, Ryan A.; Clevenger, Jascinda; Patrizi, Gary A.; Klem, John F.; et al

    2016-04-21

    Flip-chip heterogeneously integrated n-p-n InGaP/GaAs heterojunction bipolar transistors (HBTs) with integrated thermal management on wide-bandgap AlN substrates followed by GaAs substrate removal are demonstrated. Without thermal management, substrate removal after integration significantly aggravates self-heating effects, causing poor I–V characteristics due to excessive device self-heating. An electrothermal codesign scheme is demonstrated that involves simulation (design), thermal characterization, fabrication, and evaluation. Thermoreflectance thermal imaging, electrical-temperature sensitive parameter-based thermometry, and infrared thermography were utilized to assess the junction temperature rise in HBTs under diverse configurations. In order to reduce the thermal resistance of integrated devices, passive cooling schemes assisted by structural modification, i.e.,more » positioning indium bump heat sinks between the devices and the carrier, were employed. By implementing thermal heat sinks in close proximity to the active region of flip-chip integrated HBTs, the junction-to-baseplate thermal resistance was reduced over a factor of two, as revealed by junction temperature measurements and improvement of electrical performance. In conclusion, the suggested heterogeneous integration method accounts for not only electrical but also thermal requirements providing insight into realization of advanced and robust III–V/Si heterogeneously integrated electronics.« less

  16. Transport properties of InGaAs/GaAs Heterostructures with {delta}-doped quantum wells

    SciTech Connect (OSTI)

    Baidus, N. V.; Vainberg, V. V.; Zvonkov, B. N.; Pylypchuk, A. S. Poroshin, V. N.; Sarbey, O. G.

    2012-05-15

    The lateral transport of electrons in single- and double-well pseudomorphic GaAs/n-InGaAs/GaAs heterostructures with quantum wells 50-100 meV deep and impurity {delta}-layers in the wells, with concentrations in the range 10{sup 11} < N{sub s} < 10{sup 12} cm{sup -2}, has been investigated. Single-well structures with a doped well at the center exhibit a nonmonotonic temperature dependence of the Hall coefficient and an increase in low-temperature electron mobility with an increase in the impurity concentration. The results obtained indicate that the impurity-band electron states play an important role in the conductivity of these structures. Involvement of the impurity band also allows to explain adequately the characteristics of the conductivity of double-well structures; in contrast to single-well structures, band bending caused by asymmetric doping is of great importance. The numerical calculations of conductivity within the model under consideration confirm these suggestions.

  17. Optical properties of multi-stacked InGaAs/GaNAs quantum dot solar cell fabricated on GaAs (311)B substrate

    SciTech Connect (OSTI)

    Shoji, Yasushi; Akimoto, Katsuhiro; Okada, Yoshitaka

    2012-09-15

    Quantum dot solar cells (QDSCs) comprised of 10 stacked pairs of strain-compensated InGaAs/GaNAs QD structure have been fabricated by atomic hydrogen-assisted molecular beam epitaxy. A homogeneous and high-density QD array structure with improved in-plane ordering and total density of {approx}10{sup 12} cm{sup -2} has been achieved on GaAs (311)B grown at 460 Degree-Sign C after stacking. The external quantum efficiency (EQE) of InGaAs/GaNAs QDSC increases in the longer wavelength range due to additive contribution from QD layers inserted in the intrinsic region. The short-circuit current density measured for QDSC is 17.2 mA/cm{sup 2} compared to 14.8 mA/cm{sup 2} of GaAs reference cell. Further, an increase in EQE due to photocurrent production by 2-step photon absorption has been observed at room temperature though it is still small at around 0.1%.

  18. Progress toward technology transition of GaInP{sub 2}/GaAs/Ge multijunction solar cells

    SciTech Connect (OSTI)

    Keener, D.N.; Marvin, D.C.; Brinker, D.J.; Curtis, H.B.; Price, P.M.

    1997-12-31

    The objective of the joint WL/PL/NASA Multijunction Solar Cell Manufacturing Technology (ManTech) Program is to scale up high efficiency GaInP{sub 2}/GaAs/Ge multijunction solar cells to production size, quantity, and yield while limiting the production cost/Watt ($/W) to 15% over GaAs cells. Progress made by the program contractors, Spectrolab and TECSTAR, include, respectively, best cell efficiencies of 25.76% and 24.7% and establishment of 24.2% and 23.8% lot average efficiency baseline designs. The paper also presents side-by-side testing results collected by Phillips Laboratory and NASA Lewis on Phase 1 deliverable cells, which shows compliance with program objectives. Cell performance, pre- and post-radiation, and temperature coefficient results on initial production GaInP{sub 2}/GaAs/Ge solar cells will be presented.

  19. Structural and emission properties of InGaAs/GaAs quantum dots emitting at 1.3??m

    SciTech Connect (OSTI)

    Goldmann, Elias Jahnke, Frank; Paul, Matthias; Kettler, Jan; Jetter, Michael; Michler, Peter; Krause, Florian F.; Mller, Knut; Mehrtens, Thorsten; Rosenauer, Andreas

    2014-10-13

    A combined experimental and theoretical study of InGaAs/GaAs quantum dots (QDs) emitting at 1.3??m under the influence of a strain-reducing InGaAs quantum well is presented. We demonstrate a red shift of 2040?nm observed in photoluminescence spectra due to the quantum well. The InGaAs/GaAs QDs grown by metal organic vapor phase epitaxy show a bimodal height distribution (1?nm and 5?nm) and indium concentrations up to 90%. The emission properties are explained with combined tight-binding and configuration-interaction calculations of the emission wavelengths in conjunction with high-resolution scanning transmission electron microscopy investigations of QD geometry and indium concentrations in the QDs, which directly enter the calculations. QD geometries and concentration gradients representative for the ensemble are identified.

  20. Ferromagnetism in undoped One-dimensional GaN Nanowires

    SciTech Connect (OSTI)

    Jeganathan, K. E-mail: jagan@physics.bdu.ac.in; Purushothaman, V.; Debnath, R.; Arumugam, S.

    2014-05-15

    We report an intrinsic ferromagnetism in vertical aligned GaN nanowires (NW) fabricated by molecular beam epitaxy without any external catalyst. The magnetization saturates at ?0.75 emu/gm with the applied field of 3000 Oe for the NWs grown under the low-Gallium flux of 2.4 10{sup ?8} mbar. Despite a drop in saturation magnetization, narrow hysteresis loop remains intact regardless of Gallium flux. Magnetization in vertical standing GaN NWs is consistent with the spectral analysis of low-temperature photoluminescence pertaining to Ga-vacancies associated structural defects at the nanoscale.

  1. Characterization of Zns-GaP Naon-composites

    SciTech Connect (OSTI)

    Todd, V.

    1993-12-09

    It proved possible to produce consistent, high-quality nanocrystalline ZnS powders with grain sizes as small as 8 nm. These powders are nano-porous and are readily impregnated with GaP precursor, although inconsistently. Both crystal structure and small grain size of the ZnS can be maintained through the use of GaP. Heat treatment of the impregnated powders results in a ZnS-GaP composite structure where the grain sizes of the phases are on the order of 10--20 nm. Conventional powder processing should be able to produce optically dense ceramic compacts with improved mechanical properties and suitable IR transmission.

  2. Outdoor Testing of GaInP2/GaAs Tandem Cells with Top Cell Thickness Varied

    SciTech Connect (OSTI)

    McMahon, W. E.; Emergy, K. E.; Friedman, D. J.; Ottoson, L.; Young, M. S.; Ward, J. S.; Kramer, C. M.; Duda, A.; Kurtz, S.

    2005-08-01

    In this study, we measure the performance of GaInP2/GaAs tandem cells under direct beam sunlight outdoors in order to quantify their sensitivity to both spectral variation and GaInP2 top-cell thickness. A set of cells with five different top-cell thicknesses was mounted on a two-axis tracker with the incident sunlight collimated to exclude all except the direct beam. Current-voltage (I-V) curves were taken throughout the course of several days, along with measurements of the direct solar spectrum. Our two major conclusions are: (1) GaInP2/GaAs tandem cells designed for either the ASTM G-173 direct (G-173D) spectrum or the "air mass 1.5 global" (AM1.5G) spectrum perform the best, and (2) cells can be characterized indoors and modeled using outdoor spectra with the same result. These results are equally valid for GaInP2/GaAs/Ge triple-junction cells.

  3. Making it pay in Athens, GA

    SciTech Connect (OSTI)

    Malloy, M.G.

    1997-04-01

    The materials recovery facility (MRF) in Athens, GA, is a well-fed recycling facility. But, if the local government has its way, it will be even better fed in the near future. The Athens-Clarke County (ACC) regional municipality in which the facility resides has a put-or-pay contract with the plant`s owner/operator, under which the more it feeds the MRF, the more money it receives in return, through the sale of recycled end products. The ACC Solid Waste Department uses a volume-based waste collection system that encourages residents to recycle--the more they recycle, the less trash they have to put out, and the less they pay each month. The Athens facility, which will be a featured site tour at next month`s WasteExpo `97 in nearby Atlanta, had its ground-breaking two years ago, in April 1995. ACC is responsible for delivering material--or seeing that recyclables are delivered--to the MRF, which is owned and operated by Resource Recovery Systems (RRS, Centerbrook, Conn.). Over the past year, ACC has stepped up various incentives for businesses to recycle and send their recyclables to the facility, including instituting pilot programs for commercial interests that offer them versions of volume-based collection similar to that done by residents.

  4. AN ESTIMATE OF THE CHEMICAL COMPOSITION OF TITAN's LAKES

    SciTech Connect (OSTI)

    Cordier, Daniel; Mousis, Olivier; Lunine, Jonathan I.; Lavvas, Panayotis; Vuitton, Veronique

    2009-12-20

    Hundreds of radar-dark patches interpreted as lakes have been discovered in the north and south polar regions of Titan. We have estimated the composition of these lakes by using the direct abundance measurements from the Gas Chromatograph Mass Spectrometer aboard the Huygens probe and recent photochemical models based on the vertical temperature profile derived by the Huygens Atmospheric Structure Instrument. Thermodynamic equilibrium is assumed between the atmosphere and the lakes, which are also considered nonideal solutions. We find that the main constituents of the lakes are ethane (C{sub 2}H{sub 6}) (approx76%-79%), propane (C{sub 3}H{sub 8}) (approx7%-8%), methane (CH{sub 4}) (approx5%-10%), hydrogen cyanide (HCN) (approx2%-3%), butene (C{sub 4}H{sub 8}) (approx1%), butane (C{sub 4}H{sub 10}) (approx1%), and acetylene (C{sub 2}H{sub 2}) (approx1%). The calculated composition of lakes is then substantially different from what has been expected from models elaborated prior to the exploration of Titan by the Cassini-Huygens spacecraft.

  5. Local Structures and Interface Morphology of InGaAsN Thin Films Grown on GaAs

    SciTech Connect (OSTI)

    Allerman, A.A.; Chen, J.G.; Geisz, J.F.; Huang, S.; Hulbert, S.L.; Jones, E.D.; Kao, Y.H.; Kurtz, S.; Kurtz, S.R.; Olson, J.M.; Soo, Y.L.

    1999-02-23

    The compound semiconductor system InGaAsN exhibits many intriguing properties which are particularly useful for the development of innovative high efficiency thin film solar cells and long wavelength lasers. The bandgap in these semiconductors can be varied by controlling the content of N and In and the thin films can yet be lattice-matched to GaAs. In the present work, x-ray absorption fine structure (XAFS) and grazing incidence x-ray scattering (GIXS) techniques have been employed to probe the local environment surrounding both N and In atoms as well as the interface morphology of InGaAsN thin films epitaxially grown on GaAs. The soft x-ray XAFS results around nitrogen K-edge reveal that N is in the sp{sup 3} hybridized bonding configuration in InGaAsN and GaAsN, suggesting that N impurities most likely substitute for As sites in these two compounds. The results of In K-edge XAFS suggest a possible trend of a slightly larger coordination number of As nearest neighbors around In atoms in InGaAsN samples with a narrower bandgap whereas the In-As interatomic distance remains practically the same as in InAs within the experimental uncertainties. These results combined suggest that N-substitution of the As sites plays an important role of bandgap-narrowing while in the meantime counteracting the compressive strain caused by In-doping. Grazing incidence x-ray scattering (GIXS) experiments verify that InGaAsN thin films can indeed form very smooth interfaces with GaAs yielding an average interfacial roughness of 5-20{angstrom}.

  6. DOE Tour of Zero Floorplans: Mutual Housing at Spring Lake by...

    Energy Savers [EERE]

    DOE Tour of Zero Floorplans: Mutual Housing at Spring Lake by Mutual Housing California DOE Tour of Zero Floorplans: Mutual Housing at Spring Lake by Mutual Housing California DOE ...

  7. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research...

    Open Energy Info (EERE)

    at Mirror Lake Research Site Citation U.S. Geological Survey. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Internet. 2013. U.S. Geological Survey. cited...

  8. Electrical spin injection using GaCrN in a GaN based spin light emitting diode

    SciTech Connect (OSTI)

    Banerjee, D.; Ganguly, S.; Saha, D.; Adari, R.; Sankaranarayan, S.; Kumar, A.; Aldhaheri, R. W.; Hussain, M. A.; Balamesh, A. S.

    2013-12-09

    We have demonstrated electrical spin-injection from GaCrN dilute magnetic semiconductor (DMS) in a GaN-based spin light emitting diode (spin-LED). The remanent in-plane magnetization of the thin-film semiconducting ferromagnet has been used for introducing the spin polarized electrons into the non-magnetic InGaN quantum well. The output circular polarization obtained from the spin-LED closely follows the normalized in-plane magnetization curve of the DMS. A saturation circular polarization of ?2.5% is obtained at 200?K.

  9. Effects of light illumination on electron velocity of AlGaN/GaN heterostructures under high electric field

    SciTech Connect (OSTI)

    Guo, Lei; Yang, Xuelin Cheng, Jianpeng; Sang, Ling; Xu, Fujun; Tang, Ning; Feng, Zhihong; Lv, Yuanjie; Wang, Xinqiang; Shen, B.; Ge, Weikun

    2014-12-15

    We have investigated the variation of electron velocity in AlGaN/GaN heterostructures depending on illuminating light intensity and wavelength. It is shown that the electron velocity at high electric field increases under above-band light illumination. This electron velocity enhancement is found to be related to the photo-generated cold holes which interact with hot electrons and thus accelerate the energy relaxation at high electric field. The results suggest an alternative way to improve the electron energy relaxation rate and hence the electron velocity in GaN based heterostructures.

  10. Microscopic, electrical and optical studies on InGaN/GaN quantum wells based LED devices

    SciTech Connect (OSTI)

    Mutta, Geeta Rani; Venturi, Giulia; Castaldini, Antonio; Cavallini, Anna

    2014-02-21

    We report here on the micro structural, electronic and optical properties of a GaN-based InGaN/GaN MQW LED grown by the MOVPE method. The present study shows that the threading dislocations present in these LED structures are terminated as V pits at the surface and have an impact on the electrical and optical activity of these devices. It has been pointed that these dislocations were of edge, screw and mixed types. EBIC maps suggest that the electrically active defects are screw and mixed dislocations and behave as nonradiative recombinant centres.

  11. High-power InGaAs/GaAs quantum-well laser with enhanced broad spectrum of stimulated emission

    SciTech Connect (OSTI)

    Wang, Huolei; Yu, Hongyan; Zhou, Xuliang; Kan, Qiang; Yuan, Lijun; Wang, Wei; Pan, Jiaoqing; Chen, Weixi; Ding, Ying

    2014-10-06

    We report the demonstration of an InGaAs/GaAs quantum well (QW) broadband stimulated emission laser with a structure that integrated a GaAs tunnel junction with two QW active regions. The laser exhibits ultrabroad lasing spectral coverage of ?51?nm at a center wavelength of 1060?nm with a total emission power of 790 mW, corresponding to a high average spectral power density of 15.5 mW/nm, under pulsed current conditions. Compared to traditional lasers, this laser with an asymmetric separate-confinement heterostructure shows broader lasing bandwidth and higher spectral power density.

  12. Evaporation-based Ge/.sup.68 Ga Separation

    DOE Patents [OSTI]

    Mirzadeh, Saed; Whipple, Richard E.; Grant, Patrick M.; O'Brien, Jr., Harold A.

    1981-01-01

    Micro concentrations of .sup.68 Ga in secular equilibrium with .sup.68 Ge in strong aqueous HCl solution may readily be separated in ionic form from the .sup.68 Ge for biomedical use by evaporating the solution to dryness and then leaching the .sup.68 Ga from the container walls with dilute aqueous solutions of HCl or NaCl. The chloro-germanide produced during the evaporation may be quantitatively recovered to be used again as a source of .sup.68 Ga. If the solution is distilled to remove any oxidizing agents which may be present as impurities, the separation factor may easily exceed 10.sup.5. The separation is easily completed and the .sup.68 Ga made available in ionic form in 30 minutes or less.

  13. Linear and nonlinear optical properties of GaAs/Al{sub x}Ga{sub 1?x}As/GaAs/Al{sub y}Ga{sub 1?y}As multi-shell spherical quantum dot

    SciTech Connect (OSTI)

    Emre Kavruk, Ahmet E-mail: aekavruk@gmail.com; Koc, Fatih; Sahin, Mehmet E-mail: mehsahin@gmail.com

    2013-11-14

    In this work, the optical properties of GaAs/Al{sub x}Ga{sub 1?x}As/GaAs/Al{sub y}Ga{sub 1?y}As multi-shell quantum dot heterostructure have been studied as a function of Al doping concentrations for cases with and without a hydrogenic donor atom. It has been observed that the absorption coefficient strength and/or resonant absorption wavelength can be adjusted by changing the Al content of inner-barrier and/or outer-barrier regions. Besides, it has been shown that the donor atom has an important effect on the control of the electronic and optical properties of the structure. The results have been presented as a function of the Al contents of the inner-barrier x and outer-barrier y regions and probable physical reasons have been discussed.

  14. Application for Presidential Permit OE Docket No. PP-412 ITC Lake Erie Connector Project

    Broader source: Energy.gov [DOE]

    Application from ITC Lake Erie to construct, operate and maintain electric transmission facilities at the U.S. - Canada Border.

  15. Uranium distribution in relation to sedimentary facies, Kern Lake, California

    SciTech Connect (OSTI)

    Merifield, P.M.; Carlisle, D.; Idiz, E.; Anderhalt, R.; Reed, W.E.; Lamar, D.L.

    1980-04-01

    Kern Lake has served as a sink for drainage from the southern Sierra Nevada and, in lesser amounts, from the southern Temblor Range. Both areas contain significant uranium source rocks. The uranium content in Holocene Kern Lake sediments correlates best with the mud (silt and clay) fraction. It correlates less well with organic carbon. Biotite grains could account for much of the uranium in the sand fraction, and perhaps the silt fraction as well. The data suggest that fixation of uranium by adsorption on mineral grains is a dominant process in this lake system. Further work is required to determine the importance of cation-exchange of uranium on clays and micas and of organically complexed uranium adsorbed to mineral surfaces. These findings also raise the question of whether uranium transport down the Kern River occurs largely as uranium adsorbed to mineral surfaces.

  16. High Quantum Efficiency AlGaN/InGaN Photodetectors

    SciTech Connect (OSTI)

    Buckley, James H; Leopold, Daniel

    2009-11-24

    High efficiency photon counting detectors in use today for high energy particle detection applications have a significant spectral mismatch with typical sources and have a number of practical problems compared with conventional bialkali photomultiplier tubes. Numerous high energy physics experiments that employ scintillation light detectors or Cherenkov detectors would benefit greatly from photomultipliers with higher quantum efficiencies. The need for extending the sensitivity of photon detectors to the blue and UV wavebands comes from the fact that both Cherenkov light and some scintillators have an emission spectrum which is peaked at short wavelengths. This research involves the development of high quantum efficiency, high gain, UV/blue photon counting detectors based on AlGaN/InGaN photocathode heterostructures grown by molecular beam epitaxy (MBE). The work could eventually lead to nearly ideal light detectors with a number of distinct advantages over existing technologies for numerous applications in high-energy physics and particle astrophysics. Potential advantages include much lower noise detection, better stability and radiation resistance than other cathode structures, very low radioactive background levels for deep underground experiments and high detection efficiency of individual UV-visible photons. We are also working on the development of photocathodes with intrinsic gain, initially improving the detection efficiency of hybrid semiconductor-vacuum tube devices, and eventually leading to an all-solid-state photomultiplier device.

  17. Enhanced optical property in quaternary GaInAsSb/AlGaAsSb quantum wells

    SciTech Connect (OSTI)

    Lin, Chien-Hung Lee, Chien-Ping

    2014-10-21

    High quality GaInAsSb/AlGaAsSb quantum wells (QWs) have been grown by molecular beam epitaxy using proper interface treatments. By controlling the group-V elements at interfaces, we obtained excellent optical quality QWs, which were free from undesired localized trap states, which may otherwise severely affect the exciton recombination. Strong and highly efficient exciton emissions up to room temperature with a wavelength of 2.2 μm were observed. A comprehensive investigation on the QW quality was carried out using temperature dependent and power dependent photoluminescence (PL) measurements. The PL emission intensity remains nearly constant at low temperatures and is free from the PL quenching from the defect induced localized states. The temperature dependent emission energy had a bulk-like behavior, indicating high quality well/barrier interfaces. Because of the uniformity of the QWs and smooth interfaces, the low temperature limit of inhomogeneous line width broadening is as small as 5 meV.

  18. Characterization of Cu(In,Ga)Se2 (CIGS) films with varying gallium ratios

    SciTech Connect (OSTI)

    Claypoole, Jesse; Peace, Bernadette; Sun, Neville; Dwyer, Dan; Eisaman, Matthew D.; Haldar, Pradeep; Efstathiadis, Harry

    2015-09-05

    Cu(In1-x,Gax)Se2 (CIGS) absorber layers were deposited on molybdenum (Mo) coated soda-lime glass substrates with varying Ga content (described as Ga/(In+Ga) ratios) with respect to depth. As the responsible mechanisms for the limitation of the performance of the CIGS solar cells with high Ga contents are not well understood, the goal of this work was to investigate different properties of CIGS absorber films with Ga/(In+Ga) ratios varied between 0.29 and 0.41 (as determined by X-ray florescence spectroscopy (XRF)) in order to better understand the role that the Ga content has on film quality. The Ga grading in the CIGS layer has the effect causing a higher bandgap toward the surface and Mo contact while the band gap in the middle of the CIGS layer is lower. Also, a wider and larger Ga/(In+Ga) grading dip located deeper in the CIGS absorber layers tend to produce larger grains in the regions of the films that have lower Ga/(In+Ga) ratios. It was found that surface roughness decreases from 51.2 nm to 41.0 nm with increasing Ga/(In+Ga) ratios. However, the surface roughness generally decreases if the Ga grading occurs deeper in the absorber layer.

  19. A new InGaP/GaAs tunneling heterostructure-emitter bipolar transistor (T-HEBT)

    SciTech Connect (OSTI)

    Tsai, Jung-Hui; Lee, Ching-Sung; Lour, Wen-Shiung; Ma, Yung-Chun; Ye, Sheng-Shiun

    2011-05-15

    Excellent characteristics of an InGaP/GaAs tunneling heterostructure-emitter bipolar transistor (T-HEBT) are first demonstrated. The insertion of a thin n-GaAs emitter layer between tynneling confinement and base layers effectivelty eliminates the potential spike at base-emitter junction and reduces the collector-emitter offset voltage, while the thin InGaP tunneling confinement layer is employed to reduce the transporting time across emitter region for electrons and maintain the good confinement effect for holes. Experimentally, the studied T-HEBN exhibits a maximum current gain of 285, a relatively low offset voltage of 40 mW, and a current-gain cutoff frequency of 26.4 GHz.

  20. Quaternary AlInGaN/InGaN quantum well on vicinal c-plane substrate for high emission intensity of green wavelengths

    SciTech Connect (OSTI)

    Park, Seoung-Hwan; Pak, Y. Eugene; Park, Chang Young; Mishra, Dhaneshwar; Yoo, Seung-Hyun; Cho, Yong-Hee Shim, Mun-Bo; Kim, Sungjin

    2015-05-14

    Electronic and optical properties of non-trivial semipolar AlInGaN/InGaN quantum well (QW) structures are investigated by using the multiband effective-mass theory and non-Markovian optical model. On vicinal c-plane GaN substrate miscut by a small angle (??GaN/InGaN system is shown to have ?3 times larger spontaneous emission peak intensity than the conventional InGaN/GaN system at green wavelength. It is attributed to much larger optical matrix element of the quaternary AlInGaN/InGaN system, derived from the reduction of internal electric field induced by polarizations. This effect exceeds the performance-degrading factor of smaller quasi-Fermi-level separation for the quaternary AlInGaN/InGaN system than that for the conventional InGaN/GaN system. Results indicate that the use of quaternary III-nitride QWs on vicinal substrates may be beneficial in improving the performance of optical devices emitting green light.

  1. The first principle study of Ni{sub 2}ScGa and Ni{sub 2}TiGa

    SciTech Connect (OSTI)

    zduran, Mustafa; Turgut, Kemal; Arikan, Nihat; ?yigr, Ahmet; Candan, Abdullah

    2014-10-06

    We computed the electronic structure, elastic moduli, vibrational properties, and Ni{sub 2}TiGa and Ni{sub 2}ScGa alloys in the cubic L2{sub 1} structure. The obtained equilibrium lattice constants of these alloys are in good agreement with available data. In cubic systems, there are three independent elastic constants, namely C{sub 11}, C{sub 12} and C{sub 44}. We calculated elastic constants in L2{sub 1} structure for Ni{sub 2}TiGa and Ni{sub 2}ScGa using the energy-strain method. The electronic band structure, total and partial density of states for these alloys were investigated within density functional theory using the plane-wave pseudopotential method implemented in Quantum-Espresso program package. From band structure, total and projected density of states, we observed metallic characters of these compounds. The electronic calculation indicate that the predominant contributions of the density of states at Fermi level come from the Ni 3d states and Sc 3d states for Ni{sub 2}TiGa, Ni 3d states and Sc 3d states for Ni{sub 2}ScGa. The computed density of states at Fermi energy are 2.22 states/eV Cell for Ni{sub 2}TiGa, 0.76 states/eV Cell for Ni{sub 2}ScGa. The vibrational properties were obtained using a linear response in the framework at the density functional perturbation theory. For the alloys, the results show that the L2{sub 1} phase is unstable since the phonon calculations have imagine modes.

  2. Growth and Band Offsets of Epitaxial Lanthanide Oxides on GaN and AlGaN

    Office of Scientific and Technical Information (OSTI)

    Sandia National Laboratories Exceptional service in the national interest SAND2015-0073C Growth and Band Offsets of Epitaxial Lanthanide Oxides on GaN and AlGaN 22 January 2015 Jon Ihlefeld, Michael Brumbach, Andrew A. Allerman, David R. Wheeler, and Stanley Atcitty This work was supported by the U.S. Department of Energy's Office of Electricity Delivery and Energy Reliability Program managed by Dr. Imre Gyuk and the Laboratory Directed Research and Development Program at Sandia National

  3. Refiner/marketer targets production of transportation fuels and distillates

    SciTech Connect (OSTI)

    Thompson, J.E.

    1997-01-01

    Citgo Petroleum Corp., the wholly owned subsidiary of Petroleos de Venezuela, S.A. (PDVSA), the Venezuelan national oil company, owns two gasoline producing refineries, a 305,000-b/d system in Lake Charles, La., and a 130,000-b/d facility in Corpus Christi, Texas. Each is considered a deep conversion facility capable of converting heavy, sour crudes into a high percentage of transportation fuels and distillates. Two smaller refineries, one in Paulsboro, N.J., and one in Savannah, GA., have the capacity to process 40,000 b/d and 28,000 b/d of crude, respectively, for asphalt products. In the past two years, Citgo`s light oils refineries operated safely and reliably with a minimum of unscheduled shutdowns. An ongoing emphasis to increase reliability has resulted in extended run lengths at the refineries. Citgo has invested $314 million at its facilities in 1995, much of this toward environmental and regulatory projects, such as the new waste water treatment unit at the Lake Charles refinery. Over the next few years, Citgo expects to complete $1.5 billion in capital spending for major processing units such as a 60,000-b/d FCC feed hydrotreater unit at the Lake Charles refinery and crude expansion at the Corpus Christi refinery. Product exchanges and expanded transport agreements are allowing Citgo to extend its marketing reach.

  4. Effects of high-temperature AIN buffer on the microstructure of AlGaN/GaN HEMTs

    SciTech Connect (OSTI)

    Coerekci, S.; Oeztuerk, M. K.; Yu, Hongbo; Cakmak, M.; Oezcelik, S.; Oezbay, E.

    2013-06-15

    Effects on AlGaN/GaN high-electron-mobility transistor structure of a high-temperature AlN buffer on sapphire substrate have been studied by high-resolution x-ray diffraction and atomic force microscopy techniques. The buffer improves the microstructural quality of GaN epilayer and reduces approximately one order of magnitude the edge-type threading dislocation density. As expected, the buffer also leads an atomically flat surface with a low root-mean-square of 0.25 nm and a step termination density in the range of 10{sup 8} cm{sup -2}. Due to the high-temperature buffer layer, no change on the strain character of the GaN and AlGaN epitaxial layers has been observed. Both epilayers exhibit compressive strain in parallel to the growth direction and tensile strain in perpendicular to the growth direction. However, an high-temperature AlN buffer layer on sapphire substrate in the HEMT structure reduces the tensile stress in the AlGaN layer.

  5. p-doping-free InGaN/GaN light-emitting diode driven by three-dimensional hole gas

    SciTech Connect (OSTI)

    Zhang, Zi-Hui; Tiam Tan, Swee; Kyaw, Zabu; Liu, Wei; Ji, Yun; Ju, Zhengang; Zhang, Xueliang [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore) [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Wei Sun, Xiao, E-mail: EXWSUN@ntu.edu.sg [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Department of Electronics and Electrical Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055 (China); Volkan Demir, Hilmi, E-mail: VOLKAN@stanfordalumni.org [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Department of Electrical and Electronics, UNAM-Institute of Material Science and Nanotechnology, Bilkent University, Ankara TR-06800 (Turkey); Department of Physics, UNAM-Institute of Material Science and Nanotechnology, Bilkent University, Ankara TR-06800 (Turkey)

    2013-12-23

    Here, GaN/Al{sub x}Ga{sub 1-x}N heterostructures with a graded AlN composition, completely lacking external p-doping, are designed and grown using metal-organic-chemical-vapour deposition (MOCVD) system to realize three-dimensional hole gas (3DHG). The existence of the 3DHG is confirmed by capacitance-voltage measurements. Based on this design, a p-doping-free InGaN/GaN light-emitting diode (LED) driven by the 3DHG is proposed and grown using MOCVD. The electroluminescence, which is attributed to the radiative recombination of injected electrons and holes in InGaN/GaN quantum wells, is observed from the fabricated p-doping-free devices. These results suggest that the 3DHG can be an alternative hole source for InGaN/GaN LEDs besides common Mg dopants.

  6. Lake Roosevelt Fisheries Evaluation Program, Part B; Limnology, Primary Production, and Zooplankton in Lake Roosevelt, Washington, 1998 Annual Report.

    SciTech Connect (OSTI)

    Shields, John; Spotts, Jim; Underwood, Keith

    2002-11-01

    The Lake Roosevelt Fisheries Evaluation Program is the result of a merger between two projects, the Lake Roosevelt Monitoring Program (BPA No. 8806300) and the Lake Roosevelt Data Collection Project (BPA No. 9404300). These projects were merged in 1996 to continue work historically completed under the separate projects, and is now referred to as the Lake Roosevelt Fisheries Evaluation Program. The 1998 Annual Report, Part B. Limnology, Primary Production, and Zooplankton in Lake Roosevelt, Washington examined the limnology, primary production, and zooplankton at eleven locations throughout the reservoir. The 1998 research protocol required a continuation of the more complete examination of limnological parameters in Lake Roosevelt that began in 1997. Phytoplankton and periphyton speciation, phytoplankton and periphyton chlorophyll a analysis, complete zooplankton biomass analysis by taxonomic group, and an increased number of limnologic parameters (TDG, TDS, etc.) were examined and compared with 1997 results. Total dissolved gas levels were greatly reduced in 1998, compared with 1997, likely resulting from the relatively normal water year experienced in 1998. Mean water temperatures were similar to what was observed in past years, with a maximum of 22.7 C and a minimum of 2.6 C. Oxygen concentrations were also relatively normal, with a maximum of 16.6 mg/L, and a minimum of 0.9 mg/L. Phytoplankton in Lake Roosevelt was primarily composed of microplankton (29.6%), Cryptophyceae (21.7%), and Bacillriophyceae (17.0 %). Mean total phytoplankton chlorophyll a maximum concentration occurred in May (3.53 mg/m{sup 3}), and the minimum in January (0.39 mg/m{sup 3}). Phytoplankton chlorophyll a concentrations appear to be influenced by hydro-operations and temperature. Trophic status as indicated by phytoplankton chlorophyll a concentrations place Lake Roosevelt in the oligomesotrophic range. Periphyton colonization rates and biovolume were significantly greater at a depth of 1.5 m (5 ft) when compared with a 4.6 m (15 ft) depth, and during the shorter incubation periods (two and four weeks). Mean zooplankton densities were greatest for Copepoda (88 %), then Daphnia spp. (10%) and other Cladocera (2.1%), while the zooplankton biomass assessment indicated Daphnia spp. had the greatest biomass (53.6%), then Copepoda (44.0%) and other Cladocera (2.5%). Mean overall zooplankton densities were the lowest observed since 1991. The cause was unclear, but may have been an artifact of human error. It seems unlikely that hydro-operations played a significant part in the reduction of zooplankton in light of the relatively friendly water year of 1998.

  7. LiT Electrolysis Research at Savannah River National Laboratory (SRNL) |

    Office of Environmental Management (EM)

    Leucadia Energy Leucadia Energy Leucadia Energy LAKE CHARLES CCS PROJECT In October 2009, DOE selected the Leucadia Energy, LLC team to initiate one of 12 projects in Phase 1 of its Industrial Carbon Capture and Storage (ICCS) program. DOE again selected the project in June 2010 as one of three projects to receive continued (Phase 2) funding. In total, DOE provided approximately $261 million in financial assistance to the Lake Charles Carbon Capture & Sequestration (Lake Charles CCS) project

  8. Microsoft Word - Leucadia ROD.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    [6450-01-P] DEPARTMENT OF ENERGY Record of Decision and Floodplain Statement of Findings for the Lake Charles Carbon Capture and Sequestration Project AGENCY: Department of Energy ACTION: Record of Decision SUMMARY: The U.S. Department of Energy (DOE) announces its decision to provide cost-shared funding to Leucadia Energy, LLC (Leucadia) for its Lake Charles Carbon Capture and Sequestration project (Lake Charles CCS project) under DOE's Industrial Carbon Capture Sequestration (ICCS) Program.

  9. EIS-0464: Record of Decision | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Record of Decision EIS-0464: Record of Decision DOE announces its decision to provide cost-shared funding to Leucadia Energy, LLC (Leucadia) for its Lake Charles Carbon Capture and Sequestration project (Lake Charles CCS project) under DOE's Industrial Carbon Capture Sequestration Program. DOE prepared an environmental impact statement (EIS) to evaluate the potential environmental impacts associated with DOE's proposed action of providing financial assistance to the Lake Charles CCS project. The

  10. Intermixing of InGaAs/GaAs Quantum Well Using Multiple Cycles Annealing Cu-doped SiO2

    SciTech Connect (OSTI)

    Hongpinyo, V; Ding, Y H; Dimas, C E; Wang, Y; Ooi, B S; Qiu, W; Goddard, L L; Behymer, E M; Cole, G D; Bond, T C

    2008-06-11

    The authors investigate the effect of intermixing in InGaAs/GaAs quantum well structure using Cu-doped SiO{sub 2}. The incorporation of Cu into the silica film yields larger bandgap shift than typical impurity-free vacancy diffusion (IFVD) method at a lower activation temperature. We also observe enhancement of the photoluminescence (PL) signal from the intermixed InGaAs/GaAs quantum well structure after being cycle-annealed at 850 C.

  11. Characterization of Cu(In,Ga)Se2 (CIGS) films with varying gallium ratios

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Claypoole, Jesse; Peace, Bernadette; Sun, Neville; Dwyer, Dan; Eisaman, Matthew D.; Haldar, Pradeep; Efstathiadis, Harry

    2015-09-05

    Cu(In1-x,Gax)Se2 (CIGS) absorber layers were deposited on molybdenum (Mo) coated soda-lime glass substrates with varying Ga content (described as Ga/(In+Ga) ratios) with respect to depth. As the responsible mechanisms for the limitation of the performance of the CIGS solar cells with high Ga contents are not well understood, the goal of this work was to investigate different properties of CIGS absorber films with Ga/(In+Ga) ratios varied between 0.29 and 0.41 (as determined by X-ray florescence spectroscopy (XRF)) in order to better understand the role that the Ga content has on film quality. The Ga grading in the CIGS layer hasmore » the effect causing a higher bandgap toward the surface and Mo contact while the band gap in the middle of the CIGS layer is lower. Also, a wider and larger Ga/(In+Ga) grading dip located deeper in the CIGS absorber layers tend to produce larger grains in the regions of the films that have lower Ga/(In+Ga) ratios. It was found that surface roughness decreases from 51.2 nm to 41.0 nm with increasing Ga/(In+Ga) ratios. However, the surface roughness generally decreases if the Ga grading occurs deeper in the absorber layer.« less

  12. Radiation damage of GaAs thin-film solar cells on Si substrates

    SciTech Connect (OSTI)

    Itoh, Y.; Yamaguchi, M.; Nishioka, T.; Yamamoto, A.

    1987-01-15

    1-MeV electron irradiation damages in GaAs thin-film solar cells on Si substrates are examined for the first time. Damage constant for minority-carrier diffusion length in GaAs heteroepitaxial films on Si substrates is found to be the same as that in GaAs homoepitaxial films on GaAs substrates. This agreement suggests that GaAs/Si has the same defect introduction rate with radiation as GaAs/GaAs. The degradation of GaAs solar cells on Si with electron irradiation is less than that of GaAs solar cells on GaAs, because in the present, GaAs films on Si substrates have lower minority-carrier diffusion length compared to GaAs films on GaAs and these films are insensitive to radiation. The p/sup +/-p/sup +/-n AlGaAs-GaAs heteroface solar cell with junction depth of about 0.3 ..mu..m is concluded to be useful for a high-efficiency and radiation-resistant solar cell fabricated on a Si substrate.

  13. Laser Gain and Threshold Properties in Compressive-Strained and Lattice-Matched GaInNAs/GaAs Quantum Wells

    SciTech Connect (OSTI)

    Chow, W.W.; Jones, E.D.; Modine, N.A.; Allerman, A.A.; Kurtz, S.R.

    1999-08-04

    The optical gain spectra for compressive-strained and lattice-matched GaInNAs/GaAs quantum wells are computed using a microscopic laser theory. From these spectra, the peak gain and carrier radiative decay rate as functions of carrier density are determined. These dependences allow the study of lasing threshold current density for different GAInNAs/GaAs laser structures.

  14. Changing Weather and Climate in the Great Lakes Region Webinar

    Broader source: Energy.gov [DOE]

    Offered by the University of Wisconsin-Madison through Coursera, this four-week course will feature a new season each week through short lectures and activities covering Great Lakes weather, observed changes in the climate, and societal impacts of climate change.

  15. Salt Lake City, Utah: Solar in Action (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01

    This brochure provides an overview of the challenges and successes of Salt Lake City, UT, a 2007 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given.

  16. Proceedings of the Great Lakes Solar Greenhouse Conference V

    SciTech Connect (OSTI)

    Currin, C.G. (ed.)

    1983-01-01

    Proceedings of the Fifth Great Lakes Greenhouse Conference are presented. Topics included are: a review of a greenhouses, greenhouses as integral part of an earth-sheltered home, solar architecture, design criteria, heat contribution for solar greenhouses, and the future of solar greenhouses.

  17. Proceedings of the Great Lakes Solar Greenhouse Conference V

    SciTech Connect (OSTI)

    Currin, C.G. (ed.)

    1983-01-01

    Proceedings of the Fifth Great Lakes Solar Greenhouse Conference are presented. Topics included are a review of greenhouses, greenhouses as integral part of an earth-sheltered house, solar architecture, design criteria, heat contribution from solar greenhouses, and the future for solar greenhouses.

  18. Radiation resistance of GaAs-GaAlAs vertical cavity surface emitting lasers

    SciTech Connect (OSTI)

    Jabbour, J.; Zazoui, M.; Sun, G.C.; Bourgoin, J.C.; Gilard, O.

    2005-02-15

    The variations of the optical and electrical characteristics of a vertical cavity surface emitting laser based on GaAs quantum wells have been monitored versus irradiation with 1 MeV electrons. The results are understood by the introduction of nonradiative recombination centers in the wells whose characteristics, capture cross section for minority carriers times their introduction rate, can be determined. A similar study performed for proton irradiation shows that the results can be explained in the same way when the introduction rate of the defects is replaced by the proton energy loss into atomic collisions. These results allow us to deduce the equivalence between electron and proton irradiations: A flux of 1 proton cm{sup -2} which loses an energy E{sub nl} (eV) into atomic collisions is equivalent to a fluence of about 9x10{sup -2} E{sub nl} cm{sup -2}, 1 MeV electrons.

  19. Lake Roosevelt Fisheries Evaluation Program : Lake Whatcom Kokanee Salmon (Oncorhynchus nerka kennerlyi) : Investigations in Lake Roosevelt Annual Report 1999-2000.

    SciTech Connect (OSTI)

    McLellan, Holly J.; Scholz, Allan T.; McLellan, Jason G.; Tilson, Mary Beth

    2001-07-01

    Lake Whatcom stock kokanee have been planted in Lake Roosevelt since 1988 with the primary goal of establishing a self-sustaining fishery. Returns of hatchery kokanee to egg collection facilities and recruitment to the creel have been minimal. Therefore, four experiments were conducted to determine the most appropriate release strategy that would increase kokanee returns. The first experiment compared morpholine and non-morpholine imprinted kokanee return rates, the second experiment compared early and middle run Whatcom kokanee, the third experiment compared early and late release dates, and the fourth experiment compared three net pen release strategies: Sherman Creek hatchery vs. Sherman Creek net pens, Colville River net pens vs. Sherman Creek net pens, and upper vs. lower reservoir net pen releases. Each experiment was tested in three ways: (1) returns to Sherman Creek, (2) returns to other tributaries throughout the reservoir, and (3) returns to the creel. Chi-square analysis of hatchery and tributary returns indicated no significant difference between morpholine imprinted and non-imprinted fish, early run fish outperformed middle run fish, early release date outperformed late release fish, and the hatchery outperformed all net pen releases. Hatchery kokanee harvest was estimated at 3,323 fish, which was 33% of the total harvest. Return rates (1998 = 0.52%) of Whatcom kokanee were low indicating an overall low performance that could be caused by high entrainment, predation, and precocity. A kokanee stock native to the upper Columbia, as opposed to the coastal Whatcom stock, may perform better in Lake Roosevelt.

  20. Notices

    Broader source: Energy.gov (indexed) [DOE]

    Morgan Louisiana Pipeline LLC; Notice of Availability of the Draft Environmental Impact Statement for the Proposed Magnolia LNG and Lake Charles Expansion Projects The staff of the ...

  1. EIS-0491: EPA Notice of Availability of Draft Environmental Impact...

    Office of Environmental Management (EM)

    EPA Notice of Availability of Draft Environmental Impact Statement Lake Charles Liquefaction Project, Calcasieu Parish, Louisiana The Environmental Protection Agency issued a...

  2. EIS-0491: FERC Notice of Availability of Draft Environmental...

    Broader source: Energy.gov (indexed) [DOE]

    Lake Charles Liquefaction Project, Calcasieu Parish, Louisiana Federal Energy Regulatory Commission issued a notice of availability of a Draft EIS that analyzes the potential...

  3. EIS-0491: Notice of Intent to Prepare an Environmental Impact...

    Office of Environmental Management (EM)

    Notice of Intent to Prepare an Environmental Impact Statement Lake Charles Liquefaction Project, Calcasieu Parish, LA The Federal Energy Regulatory Commission (FERC) is...

  4. EIS-0491: Supplemental Notice of Intent to Prepare an Environmental...

    Office of Environmental Management (EM)

    Notice of Intent to Prepare an Environmental Impact Statement Lake Charles Liquefaction Project, Calcasieu Parish, Louisiana The Federal Energy Regulatory Commission...

  5. EIS-0491: EPA Notice of Availability of Draft Environmental Impact...

    Broader source: Energy.gov (indexed) [DOE]

    environmental impacts of a proposal to construct and operate the Lake Charles Liquefaction Project. For more information on this project, including available public comment...

  6. EIS-0498: Draft Environmental Impact Statement | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Draft Environmental Impact Statement EIS-0498: Draft Environmental Impact Statement Magnolia LNG and Lake Charles Expansion Projects, Calcasieu Parish, Louisiana The Federal Energy ...

  7. EIS-0498: Notice of Availability for the Final Environmental...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Notice of Availability for the Final Environmental Impact Statement EIS-0498: Notice of Availability for the Final Environmental Impact Statement Magnolia LNG and Lake Charles ...

  8. EIS-0498: Final Environmental Impact Statement | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Final Environmental Impact Statement EIS-0498: Final Environmental Impact Statement Magnolia LNG and Lake Charles Expansion Projects, Calcasieu Parish, Louisiana The Federal Energy ...

  9. EIS-0491: Final Environmental Impact Statement | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    1: Final Environmental Impact Statement EIS-0491: Final Environmental Impact Statement Lake Charles Liquefaction Project; Calcasieu Parish, Louisiana Federal Energy Regulatory ...

  10. Vertical zone melt growth of GaAs

    SciTech Connect (OSTI)

    Henry, R.L.; Nordquist, P.E.R.; Gorman, R.J.

    1993-12-31

    A Vertical Zone Melt (VZM) technique has been applied to the single crystal growth of GaAs. A pyrolytic boron nitride crucible and a (100) oriented seed were used along with liquid encapsulation by boric oxide. In the case of GaAs, the ampoule was pressurized with either argon or argensic vapor from elemental arsenic at pressures ranging from 1 to 2 atmospheres. A molten zone length of 22 mm gave a growth interface which is nearly flat and resulted in routine single crystal growth. Temperature gradients of 4{degrees}C/cm. and 9{degrees}C/cm. have produced dislocation densities of <1000/cm{sup 2} and 2000-5000/cm{sup 2} respectively for 34 mm diameter crystals of GaAs. Post growth cooling rates for GaAs have been 35, 160 and 500{degrees}C/hr. The cooling rate has been found to affect the number and size of arsenic precipitates and the EL2 concentration in the GaAs crystal. The effects of these and other growth parameters on the crystalline perfection and electrical properties of the crystals will be discussed.

  11. Hydrology of modern and late Holocene lakes, Death Valley, California

    SciTech Connect (OSTI)

    Grasso, D.N.

    1996-07-01

    Above-normal precipitation and surface-water runoff, which have been generally related to the cyclic recurrence of the El Nino-Southern Oscillation, have produced modern ephemeral lakes in the closed-basin Death Valley watershed. This study evaluates the regional hydroclimatic relations between precipitation, runoff, and lake transgressions in the Death Valley watershed. Recorded precipitation, runoff, and spring discharge data for the region are used in conjunction with a closed-basin, lake-water-budget equation to assess the relative contributions of water from these sources to modern lakes in Death Valley and to identify the requisite hydroclimatic changes for a late Holocene perennial lake in the valley. As part of the Yucca Mountain Site Characterization Program, an evaluation of the Quaternary regional paleoflood hydrology of the potential nuclear-waste repository site at Yucca Mountain, Nevada, was planned. The objectives of the evaluation were (1) to identify the locations and investigate the hydraulic characteristics of paleofloods and compare these with the locations and characteristics of modern floods, and (2) to evaluate the character and severity of past floods and debris flows to ascertain the potential future hazards to the potential repository during the pre-closure period (US Department of Energy, 1988). This study addresses the first of these objectives, and the second in part, by assessing and comparing the sizes, locations, and recurrence rates of modern, recorded (1962--83) floods and late Holocene paleofloods for the 8,533-mi{sup 2}, closed-basin, Death Valley watershed with its contributing drainage basins in the Yucca Mountain site area.

  12. Structural transformations in amorphous ↔ crystalline phase change of Ga-Sb alloys

    SciTech Connect (OSTI)

    Edwards, T. G.; Sen, S.; Hung, I.; Gan, Z.; Kalkan, B.; Raoux, S.

    2013-12-21

    Ga-Sb alloys with compositions ranging between ∼12 and 50 at. % Ga are promising materials for phase change random access memory applications. The short-range structures of two such alloys with compositions Ga{sub 14}Sb{sub 86} and Ga{sub 46}Sb{sub 54} are investigated, in their amorphous and crystalline states, using {sup 71}Ga and {sup 121}Sb nuclear magnetic resonance spectroscopy and synchrotron x-ray diffraction. The Ga and Sb atoms are fourfold coordinated in the as-deposited amorphous Ga{sub 46}Sb{sub 54} with nearly 40% of the constituent atoms being involved in Ga-Ga and Sb-Sb homopolar bonding. This necessitates extensive bond switching and elimination of homopolar bonds during crystallization. On the other hand, Ga and Sb atoms are all threefold coordinated in the as-deposited amorphous Ga{sub 14}Sb{sub 86}. Crystallization of this material involves phase separation of GaSb domains in Sb matrix and a concomitant increase in the Ga coordination number from 3 to 4. Results from crystallization kinetics experiments suggest that the melt-quenching results in the elimination of structural “defects” such as the homopolar bonds and threefold coordinated Ga atoms in the amorphous phases of these alloys, thereby rendering them structurally more similar to the corresponding crystalline states compared to the as-deposited amorphous phases.

  13. Nano-scale luminescence characterization of individual InGaN/GaN quantum wells stacked in a microcavity using scanning transmission electron microscope cathodoluminescence

    SciTech Connect (OSTI)

    Schmidt, Gordon Mller, Marcus; Veit, Peter; Bertram, Frank; Christen, Jrgen; Glauser, Marlene; Carlin, Jean-Franois; Cosendey, Gatien; Butt, Raphal; Grandjean, Nicolas

    2014-07-21

    Using cathodoluminescence spectroscopy directly performed in a scanning transmission electron microscope at liquid helium temperatures, the optical and structural properties of a 62 InGaN/GaN multiple quantum well embedded in an AlInN/GaN based microcavity are investigated at the nanometer scale. We are able to spatially resolve a spectral redshift between the individual quantum wells towards the surface. Cathodoluminescence spectral linescans allow directly visualizing the critical layer thickness in the quantum well stack resulting in the onset of plastic relaxation of the strained InGaN/GaN system.

  14. Quaternary InGaAsSb Thermophotovoltaic Diode Technology

    SciTech Connect (OSTI)

    M Dashiell; J Beausang; H Ehsani; G Nichols; D DePoy; L Danielson; P Talamo; K Rahner; E Brown; S Burger; P Fourspring; W Topper; P Baldasaro; C Wang; R Huang; M Connors; G Turner; Z Shellenbarger; G Taylor; Jizhong Li; R Martinelli; D Donetski; S Anikeev; G Belenky; S Luryl

    2005-01-26

    Thermophotovoltaic (TPV) diodes fabricated from InGaAsSb alloys lattice-matched to GaSb substrates are grown by Metal Organic Vapor Phase Epitaxy (MOVPE). 0.53eV InGaAsSb TPV diodes utilizing front-surface spectral control filters have been tested in a vacuum cavity and a TPV thermal-to-electric conversion efficiency ({eta}{sub TPV}) and a power density (PD) of {eta}{sub TPV} = 19% and PD=0.58 W/cm{sup 2} were measured for T{sub radiator} = 950 C and T{sub diode} = 27 C. Recombination coefficients deduced from minority carrier measurements and the theory reviewed in this article predict a practical limit to the maximum achievable conversion efficiency and power density for 0.53eV InGaAsSb TPV. The limits for the above operating temperatures are projected to be {eta}{sub TPV} = 26% and PD = 0.75 W/cm{sup 2}. These limits are extended to {eta}{sub TPV} = 30% and PD = 0.85W/cm{sup 2} if the diode active region is bounded by a reflective back surface to enable photon recycling and a two-pass optical path length. The internal quantum efficiency of the InGaAsSb TPV diode is close to the theoretically predicted limits, with the exception of short wavelength absorption in GaSb contact layers. Experiments show that the open circuit voltage of the 0.53eV InGaAsSb TPV diodes is not strongly dependent on the device architectures studied in this work where both N/P and P/N double heterostructure diodes have been grown with various acceptor and donor doping levels, having GaSb and AlGaAsSb confinement, and also partial back surface reflectors. Lattice matched InGaAsSb TPV diodes were fabricated with bandgaps ranging from 0.6 to 0.5eV without significant degradation of the open circuit voltage factor, quantum efficiency, or fill factor as the composition approached the miscibility gap. The key diode performance parameter which is limiting efficiency and power density below the theoretical limits in InGaAsSb TPV devices is the open circuit voltage. The open circuit voltages of state-of-the-art 0.53eV InGaAsSb TPV diode are {approx}10% lower than the predicted semi-empirical limit to open circuit voltage for a device having absorbing substrate; the voltages are {approx}17% below that for an Auger-limited device having back surface reflector and two-pass optical design.

  15. Hungry Horse Mitigation; Flathead Lake, 2003-2004 Annual Report.

    SciTech Connect (OSTI)

    Hansen, Barry; Evarts, Les

    2005-06-01

    The Confederated Salish and Kootenai Tribes (CSKT) and Montana Fish Wildlife and Parks (MFWP) wrote the ''Fisheries Mitigation Plan for Losses Attributable to the Construction and Operation of Hungry Horse Dam'' in March 1991 to define the fisheries losses, mitigation alternatives and recommendations to protect, mitigate and enhance resident fish and aquatic habitat affected by Hungry Horse Dam. On November 12, 1991, the Northwest Power Planning Council (NPPC) approved the mitigation plan with minor modifications, called for a detailed implementation plan, and amended measures 903(h)(1) through (7). A long-term mitigation plan was submitted in August 1992, was approved by the Council in 1993, and the first contract for this project was signed on November 11, 1993. The problem this project addresses is the loss of habitat, both in quality and quantity, in the Flathead Lake and River basin resulting from the construction and operation of Hungry Horse Dam. The purpose of the project is to both implement mitigation measures and monitor the biological responses to those measures including those implemented by Project Numbers 9101903 and 9101904. Goals and objectives of the 1994 Fish and Wildlife Program (Section 10.1) addressed by this project are the rebuilding to sustainable levels weak, but recoverable, native populations injured by the hydropower system. The project mitigates the blockage of spawning runs by Hungry Horse Dam by restoring and even creating spawning habitats within direct drainages to Flathead Lake. The project also addresses the altered habitat within Flathead Lake resulting from species shifts and consequent dominance of new species that restricts the potential success of mitigation measures. Specific goals of this project are to create and restore habitat and quantitatively monitor changes in fish populations to verify the efficacy of our mitigation measures. The project consists of three components: monitoring, restoration and research. Monitoring, for example, includes a spring gillnetting series conducted annually in Flathead Lake and builds on an existing data set initiated in 1981. Monitoring of the experimental kokanee reintroduction was a primary activity of this project between 1992 and 1997. Lake trout, whose high densities have precluded successful mitigation of losses of other species in Flathead Lake, have been monitored since 1996 to measure several biological parameters. Results of this work have utility in determining the population status of this key predator in Flathead Lake. The project has also defined the baseline condition of the Flathead Lake fishery in 1992-1993 and has conducted annual lakewide surveys since 1998. The restoration component of the project has addressed several stream channel, riparian, and fish passage problems, and suppression of non-native fish. The research component of the project began in FY 2000 and measured trophic linkages between M. relicta and other species to assist in predicting the results of our efforts to suppress lake trout. Only Objective 1 in the workplan is funded entirely by Hungry Horse Mitigation funds. Additional funds are drawn from other sources to assist in completion of Objectives 2-8.

  16. Alloy inhomogeneity and carrier localization in AlGaN sections and AlGaN/AlN nanodisks in nanowires with 240350?nm emission

    SciTech Connect (OSTI)

    Himwas, C.; Hertog, M. den; Dang, Le Si; Songmuang, R.; Monroy, E.

    2014-12-15

    We present structural and optical studies of AlGaN sections and AlGaN/AlN nanodisks (NDs) in nanowires grown by plasma-assisted molecular beam epitaxy. The Al-Ga intermixing at Al(Ga)N/GaN interfaces and the chemical inhomogeneity in AlGaN NDs evidenced by scanning transmission electron microscopy are attributed to the strain relaxation process. This interpretation is supported by the three-dimensional strain distribution calculated by minimizing the elastic energy in the structure. The alloy inhomogeneity increases with the Al content, leading to enhanced carrier localization signatures in the luminescence characteristics, i.e., red shift of the emission, s-shaped temperature dependence, and linewidth broadening. Despite these effects, the emission energy of AlGaN/AlN NDs can be tuned in the 240350?nm range with internal quantum efficiencies around 30%.

  17. Highly transparent ammonothermal bulk GaN substrates

    SciTech Connect (OSTI)

    Jiang, WK; Ehrentraut, D; Downey, BC; Kamber, DS; Pakalapati, RT; Do Yoo, H; D'Evelyn, MP

    2014-10-01

    A novel apparatus has been employed to grow ammonothermal (0001) gallium nitride (GaN) with diameters up to 2 in The crystals have been characterized by x-ray diffraction rocking-curve (XRC) analysis, optical and scanning electron microscopy (SEM), cathodoluminescence (CL), and optical spectroscopy. High crystallinity GaN with FWHM values about 20-50 arcsec and dislocation densities below 1 x 10(5) cm(-2) have been obtained. High optical transmission was achieved with an optical absorption coefficient below 1 cm(-1) at a wavelength of 450 nm. (C) 2014 Elsevier B.V. All rights reserved.

  18. Graphene/GaN diodes for ultraviolet and visible photodetectors

    SciTech Connect (OSTI)

    Lin, Fang; Chen, Shao-Wen; Meng, Jie; Tse, Geoffrey; Fu, Xue-Wen; Xu, Fu-Jun [State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871 (China); Shen, Bo; Liao, Zhi-Min, E-mail: liaozm@pku.edu.cn, E-mail: yudp@pku.edu.cn; Yu, Da-Peng, E-mail: liaozm@pku.edu.cn, E-mail: yudp@pku.edu.cn [State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871 (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)

    2014-08-18

    The Schottky diodes based on graphene/GaN interface are fabricated and demonstrated for the dual-wavelength photodetection of ultraviolet (UV) and green lights. The physical mechanisms of the photoelectric response of the diodes with different light wavelengths are different. For UV illumination, the photo-generated carriers lower the Schottky barrier and increase the photocurrent. For green light illumination, as the photon energy is smaller than the bandgap of GaN, the hot electrons excited in graphene via internal photoemission are responsible for the photoelectric response. Using graphene as a transparent electrode, the diodes show a ?mS photoresponse, providing an alternative route toward multi-wavelength photodetectors.

  19. Simple intrinsic defects in GaAs : numerical supplement.

    SciTech Connect (OSTI)

    Schultz, Peter Andrew

    2012-04-01

    This Report presents numerical tables summarizing properties of intrinsic defects in gallium arsenide, GaAs, as computed by density functional theory. This Report serves as a numerical supplement to the results published in: P.A. Schultz and O.A. von Lilienfeld, 'Simple intrinsic defects in GaAs', Modelling Simul. Mater. Sci Eng., Vol. 17, 084007 (2009), and intended for use as reference tables for a defect physics package in device models. The numerical results for density functional theory calculations of properties of simple intrinsic defects in gallium arsenide are presented.

  20. Electronic contribution to friction on GaAs

    SciTech Connect (OSTI)

    Applied Science and Technology Graduate Group, UC Berkeley; Dept. of Materials Sciences and Engineering, UC Berkeley; Salmeron, Miquel; Qi, Yabing; Park, J.Y.; Hendriksen, B.L.M.; Ogletree, D.F.; Salmeron, Miquel

    2008-04-15

    The electronic contribution to friction at semiconductor surfaces was investigated by using a Pt-coated tip with 50nm radius in an atomic force microscope sliding against an n-type GaAs(100) substrate. The GaAs surface was covered by an approximately 1 nm thick oxide layer. Charge accumulation or depletion was induced by the application of forward or reverse bias voltages. We observed a substantial increase in friction force in accumulation (forward bias) with respect to depletion (reverse bias). We propose a model based on the force exerted by the trapped charges that quantitatively explains the experimental observations of excess friction.