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Sample records for honorable dot harris

  1. The Honorable LaDoris G. Harris | Department of Energy

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

    The Honorable LaDoris G. Harris About Us The Honorable LaDoris G. Harris - Director, Office of Economic Impact and Diversity The Honorable LaDoris G. Harris The Honorable La Doris "Dot" Harris brings over 30 years of leadership and management experience as the Director of the Office of Economic Impact and Diversity at the U.S. Department of Energy (DOE). She ensures that minorities and historically underrepresented communities are afforded opportunities to actively participate in the

  2. Director Dot Harris Inspires Girls at DigiGirlz Day Event | Department of

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

    Energy Director Dot Harris Inspires Girls at DigiGirlz Day Event Director Dot Harris Inspires Girls at DigiGirlz Day Event March 3, 2015 - 4:38pm Addthis Director Harris engages with DigiGirlz (Middle Tennessee High School students) Director Harris engages with DigiGirlz (Middle Tennessee High School students) During the 3rd Annual DigiGirlz Day event held in Nashville, TN on Saturday, February, 28, 2015, Dot Harris, Director of DOE's Office of Economic Impact and Diversity, delivered an

  3. Department of Energy's Dot Harris Honored for Blazing Path for Women |

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

    Workshop | Department of Energy clean electricity workshop, along with anonymous notes of the workshop and focus group. PDF icon Department of Energy Quadrennial Technology Review Clean Electricity Workshop More Documents & Publications Slide 1 Quadrennial Technology Review's Alternative Generation Workshop Slides IEA-GIA ExCo - National Geothermal Data System and Online Tools Workshop | Department of Energy

    grid modernization workshop, along with anonymous notes of the workshop

  4. Honorable Mentions

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

    Postdoc Research Day Honorable Mentions 2012 Postdoc Research Day Award Winners

  5. Harris Walker | Department of Energy

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

    Harris Walker About Us Harris Walker - Communications Specialist, Weatherization and Intergovernmental Program Most Recent Connecticut Weatherization Project Improves Lives, ...

  6. Harry Baumes | Department of Energy

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

    Harry Baumes About Us Harry Baumes - Senior Executive Advisor to the Bioenergy Technologies Office and Director, Office of Energy Policy and New Uses, U.S. Department of ...

  7. Arno Harris | Open Energy Information

    Open Energy Info (EERE)

    Arno Harris Jump to: navigation, search Name: Arno Harris Place: California Product: Founder and General Manager of EI Solutions (formerly Prevalent Power Inc.) References: Arno...

  8. Harry Weerts | Argonne National Laboratory

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

    Harry Weerts, Associate Laboratory Director, Physical Sciences and Engineering Harry Weerts Associate Laboratory Director - Physical Sciences and Engineering Harry Weerts is the Associate Laboratory Director for Physical Sciences and Engineering. He oversees Argonne's interdisciplinary research programs in physics, chemistry, material science and nanotechnology. Weerts was formerly Director of Argonne's High Energy Physics division, and prior to that, a collider physicist at Fermilab, where he

  9. Awards & Honors - JCAP

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

    PAZ0093.JPG Awards & Honors Who We Are JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Recent Science Technology Transfer Awards & Honors Senior Management Scientific Leadership Researchers Governance & Advisory Boards Operations & Administration Who we are Overview JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Our Achievements Recent Science Technology Transfer Awards & Honors Our People Senior Management Scientific Leadership Researchers

  10. A. Paul Alivisatos and Harry Atwater

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

    Paul Alivisatos and Harry Atwater University of California, Berkeley and Caltech Photovoltaic performance of ultra-small PbSe quantum dots Achievement: We developed a synthesis for ultra-small, strongly con ned PbSe nanocrystals 1-3nm in diameter, allowing absorption to be tuned across the entire visible spectrum. A larger bandgap in smaller particles leads to higher open-circuit voltages (~0.6V) and increased overall efficiency (~3.5%) compared to previously reported photovoltaic devices of

  11. Women @ Energy: Dot Harris | Department of Energy

    Energy Savers [EERE]

    Darlene Yazzie Women @ Energy: Darlene Yazzie March 25, 2014 - 5:10pm Addthis Darlene Yazzie is a Computer Support Technician within the Computations Directorate at the Lawrence Livermore National Laboratory. Darlene Yazzie is a Computer Support Technician within the Computations Directorate at the Lawrence Livermore National Laboratory. Check out other profiles in the Women @ Energy series and share your favorites on Pinterest. Darlene Yazzie started at Lawrence Livermore National Laboratory

  12. The Honorable Harold Rogers The Honorable Daniel K. Inouye

    Office of Environmental Management (EM)

    Washington, DC 20585 (enter date here, centered) The Honorable Harold Rogers The Honorable Daniel K. Inouye Chairman, Committee on Appropriations Chairman, Committee on...

  13. Mr. Harry S. Cohen

    Office of Legacy Management (LM)

    a50b Mr. Harry S. Cohen 2956 Hathaway Road Apartment 1105 ' Richmond, Virginia 23225 Dear Mr. Cohen: ..:: The Department of Energy (DOE), as part of its Formerly Utilized Sites Remedial Action Program (FUSRAP), has reviewed information on the former site of the Virginia-Carolina Chemical Corporation, located.at @I8 Perry Street in Richmond, Virginia, to determine whether It contains residual radioactivity traceable to activities conducted on behalf of the Manhattan Engineer District and the

  14. User:Harris | Open Energy Information

    Open Energy Info (EERE)

    Harris Jump to: navigation, search Name harris Location Houston, Texas Edits 2 Friends User Edits DWC Bot 12006 Retrieved from "http:en.openei.orgwindex.php?titleUser:Harris&o...

  15. GEA Honors Geothermal Leaders

    Broader source: Energy.gov [DOE]

    The Geothermal Energy Association (GEA) has announced the winners for the GEA Honors, which recognize companies and individuals that have made significant contributions during the past year to advancing technology, spurring economic development an

  16. Honors Attorney Program

    Broader source: Energy.gov [DOE]

    The Department of Energy’s Honors Attorney Program is designed to recruit highly-qualified law school graduates (and recent law graduates completing judicial clerkships or fellowships) and offers...

  17. Scott Blake Harris | Department of Energy

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

    Scott Blake Harris - Former General Counsel Scott Blake Harris served as the General Counsel for the Department of Energy. Most Recent Getting Smarter About the Smart Grid October...

  18. DOE Honors Safety Star: Department's Program Honors Portsmouth Site

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

    Contractor Employee for Promoting Safety Excellence | Department of Energy Honors Safety Star: Department's Program Honors Portsmouth Site Contractor Employee for Promoting Safety Excellence DOE Honors Safety Star: Department's Program Honors Portsmouth Site Contractor Employee for Promoting Safety Excellence September 11, 2012 - 12:00pm Addthis Wastren-EnergX Mission Support (WEMS) Senior Safety Engineer Marsha Bevins, left, stands with DOE Director of Worker Safety and Health Brad Davy

  19. ESnet awarded honorable mention

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

    ESnet's OSCARS Selected for Honorable Mention by U.C. 2011 Larry L. Sautter Award News & Publications ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Media Jon Bashor, jbashor@lbl.gov, +1 510 486 5849 or Media@es.net Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net ESnet's

  20. Chioke B. Harris | Department of Energy

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

    Chioke B. Harris About Us Chioke B. Harris - AAAS Science and Technology Policy Fellow (ORISE) Chioke B. Harris Chioke Harris is an AAAS Science & Technology Policy Fellow placed at the US Department of Energy's Building Technologies Office in their Emerging Technologies (ET) Program. His current focus is on energy-water nexus issues in the built environment, in addition to supporting a wide array of ongoing ET programs. Dr. Harris was most recently a Postdoctoral Fellow at The University of

  1. Harry Bolson | Photosynthetic Antenna Research Center

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

    Harris Walker About Us Harris Walker - Communications Specialist, Weatherization and Intergovernmental Program Most Recent Connecticut Weatherization Project Improves Lives, Receives National Recognition May 6 New Year, New Certification Opportunities for Home Energy Workers January 2 How to Save Energy, Money with Home Energy Upgrades November 1

    Harry Bolson Harry Bolson placeholder image Harry Bolson Alumnus E-mail: hbbholson@wustl.edu Website: Washington University in St. Louis Mr. Bolson

  2. Harry Frank | Photosynthetic Antenna Research Center

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

    Harry Frank Harry Frank Harry Frank Harry Frank Research Affiliate E-mail: harry.frank@uconn.edu Phone: 860.486.2844 Fax: 860.486.6558 Website: University of Connecticut Research Affiliate Dr. Frank's research focus is on carotenoids, a class of biological pigments. This research includes the roles carotenoids play in photosynthesis and how carotenoids carry out those roles. He employs various techniques, including X-ray and electron diffraction, nuclear magnetic resonance (NMR), absorption and

  3. The Honorable Arne Duncan

    Energy Savers [EERE]

    7, 2011 The Honorable Arne Duncan Secretary of Education Washington, DC 20206-5120 Dear Secretary: As the Latino population continues to grow in the United States, so does the need to educate this growing portion of the population. Executive Order 13555, Improving Educational Opportunities and Outcomes for Latino Students, states, "only 13 percent of Latinos hold a bachelor's degree, and just 4 percent have completed graduate or professional degree programs." These are statistics we

  4. The Honorable Anthony Mosillo'

    Office of Legacy Management (LM)

    aitment of Encjrgy .~ ' , Washington,, DC 20585 The Honorable Anthony Mosillo' ', ' 6500 Niagara Square. 'Buffalo, New York 14202 Dear Mayor Mosillo: ~, ' ", Secretary of Energy Hazel, O'Leary has announced a.new approach to openness in the Department of Energy (DOE) and its communications with the public. In ., support of this initiative, we are pleased to forward the enclosed information related to the,Curtiss Wright Metal's.Processing Division;site in your / jurisdiction that performed

  5. The Honorable Patricia Titer -

    Office of Legacy Management (LM)

    JAN G -&; The Honorable Patricia Titer - 301 King.Street Alexandria, Virginia -22314 Dear Mayor Titer:, Secretary of Energy Hazel O'Leary has announced a'new approach, to, openness in the Department of Energy (DOE) and its communications wi-th the public. In support of this initiative, we are pleased to forward.the enclosed information related to the former. American Machine and Foundry Co. site in your ' jurisdiction that performed work for DOE's predecessor agencies. This ,informatibn is

  6. Wirth Chair Honors NREL's Dan Arvizu | Awards and Honors | NREL

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

    of Colorado Denver's School of Public Affairs, annually honors someone who has made an impact on environmental, economic and social sustainability issues. The Wirth Chair is...

  7. Women @ Energy: Deborah Harris | Department of Energy

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

    Harris Women @ Energy: Deborah Harris March 11, 2013 - 5:33pm Addthis Women @ Energy: Deborah Harris Dr. Deborah Harris's current research interest is in the field of neutrino interactions and oscillations. Her work at Fermilab began with NuMI, the beamline that provides neutrinos to the MINERvA experiment, focusing on the beamline monitoring system. After working on both NOvA and MINOS oscillation experiments she realized that both of these experiments would need a better understanding of

  8. Intelligence team given national honor

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

    Intelligence team given national honor Intelligence team given national honor A team known as the LANL Field Intelligence Element is being honored with the Department of Energy Exceptional Service Award. February 28, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos

  9. Los Alamos honors Laboratory Fellows

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

    Los Alamos honors Laboratory Fellows Los Alamos honors Laboratory Fellows Charles Farrar, Steven Elliott and Mikhail Shashkov are being honored with appointment as Laboratory Fellows for 2012. November 19, 2012 Steven Elliott, Mikhail Shashkov and Charles Farrar Steven Elliott, Mikhail Shashkov and Charles Farrar Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email Chuck, Steven, and Mikhail have made exceptional contributions in their fields and to national security Engineering,

  10. In DC and Around the Nation: Join the National Day of Service...

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

    Dot Harris Dot Harris Director, Office of Economic Impact and Diversity Americans in all 50 states can honor the legacy of Dr. Martin Luther King, Jr., though living out his values ...

  11. 2014 Secretarial Honor Awards | Department of Energy

    Energy Savers [EERE]

    2014 Secretarial Honor Awards 2014 Secretarial Honor Awards Secretary Moniz will present the 2014 Secretarial Honor Awards at a ceremony on May 7, 2015 from 9:45 am to 10:45 am....

  12. The Honorable Gene Dean

    Office of Legacy Management (LM)

    Energy' .' Washington, DC 20585 DE! 14 1gg4 The Honorable Gene Dean \ P.O. Box 1659~ L Huntington, West Virginia 25717 _ ',.. : Dear Mayor Dean: Secretary of Energy Hazel O'Leary has'announced,a new approach ,to openness in the'Department of Energy (DOE) and its communications with the public. In support of this in.itiative, we are pleased,to forward the..enclosed information related to the former Reduction Pilot Plant sitein your jurisdiction that performed work for DOE predecessor agencies.

  13. 2007 News | Awards and Honors | NREL

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

    on January 8. January 10, 2007 NREL Senior Research Fellow Honored by The Journal of Physical Chemistry The American Chemical Society recently honored Arthur Nozik with a...

  14. 2014 Secretarial Honor Awards | Department of Energy

    Energy Savers [EERE]

    2014 Secretarial Honor Awards 2014 Secretarial Honor Awards Secretary Moniz will present the 2014 Secretarial Honor Awards at a ceremony on May 7, 2015 from 9:45 am to 10:45 am. The Secretary's Honor Awards are designed to recognize excellence and achievements during the past year. Individuals and teams are selected by the Secretary to receive these awards.

  15. 2014 Secretarial Honor Awards | Department of Energy

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

    4 Secretarial Honor Awards 2014 Secretarial Honor Awards Secretary Moniz will present the 2014 Secretarial Honor Awards at a ceremony on May 7, 2015 from 9:45 am to 10:45 am. The Secretary's Honor Awards are designed to recognize excellence and achievements during the past year. Individuals and teams are selected by the Secretary to receive these awards.

  16. White House honors Los Alamos

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

    White House honors Los Alamos physicist's early career work July 10, 2009 Los Alamos, New Mexico, July 10, 2009-The White House today announced that Los Alamos National Laboratory physicist Ivan Vitev has received a prestigious Presidential Early Career Award for Scientists and Engineers (PECASE). The honor is the highest bestowed by the U.S. government to outstanding scientists early in their careers. Vitev joined Los Alamos National Laboratory in 2004 as a J. Robert Oppenheimer Postdoctoral

  17. Terwilliger honored with ACA Award

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

    Terwilliger honored with ACA Award Terwilliger honored with ACA Award Tom Terwilliger is the recipient of the Trueblood Award from the American Crystallographic Association (ACA). August 6, 2013 Tom Terwilliger Tom Terwilliger The Trueblood award is established in memory of Professor Kenneth N. Trueblood of UCLA, who was a major force in the early use of computers and the development of crystallographic computer programs. Tom Terwilliger of LANL's Biosecurity and Public Health group is the

  18. North Carolina Nuclear Profile - Harris

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

    Harris" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date" 1,900,"7,081",89.8,"PWR","application/vnd.ms-excel","application/vnd.ms-excel" ,900,"7,081",89.8 "Data for 2010" "PWR = Pressurized Light

  19. Harry E Mynick | Princeton Plasma Physics Lab

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

    environmental technology and policy assessment. Mynick received his bachelor's degree in physics and mathematics with highest honors from Yale University in 1972, winning in...

  20. 2014 Secretarial Honor Awards | Department of Energy

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

    Secretary Moniz will present the 2014 Secretarial Honor Awards at a ceremony on May 7, 2015 from 9:45 am to 10:45 am. The Secretary's Honor Awards are designed to recognize...

  1. National Building Museum 2010 Honor Award

    ScienceCinema (OSTI)

    Dr. Kristina M. Johnson

    2010-09-01

    This video was presented at the National Building Museum's 2010 Honor Award: A Salute to Civic Innovators.

  2. Five honored as LANL Fellows for 2011

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

    Five honored as LANL Fellows for 2011 Five honored as LANL Fellows for 2011 Bruce Carlsten, Mike Leitch, Michael MacInnes, Richard Martin, and Amit Misra honored for high-level achievements. January 13, 2012 Aerial view of Los Alamos National Laboratory Aerial view of Los Alamos National Laboratory. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email LOS ALAMOS, New Mexico, January 13, 2012-Five scientists from Los Alamos National Laboratory have been honored by Laboratory

  3. 2010 News | Awards and Honors | NREL

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

    Challenge (SERCh) Poster Competition, and three landed on top. November 29, 2010 IEEE Honors DeBlasio with Steinmetz Award Richard DeBlasio, chief engineer for renewable...

  4. Princeton Plasma Physics Laboratory Honors Three Researchers...

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

    Princeton Plasma Physics Laboratory Honors Three Researchers March 12, 2012 Tweet Widget ... the Kaul Prize for Excellence in Plasma Physics Research and Technology Development. ...

  5. Secretary's Honor Awards: Recognizing Employee Excellence

    Broader source: Energy.gov [DOE]

    Employees and officials gathered for the annual Secretary’s Honor Awards ceremony to applaud their colleagues’ achievements and commemorate 35 years of service at the Energy Department.

  6. Workplace Charging Challenge Partner: Harris Civil Engineers, LLC |

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

    Department of Energy Harris Civil Engineers, LLC Workplace Charging Challenge Partner: Harris Civil Engineers, LLC Workplace Charging Challenge Partner: Harris Civil Engineers, LLC Joined the Challenge: March 2014 Headquarters: Orlando, FL Charging Location: Orlando, FL Domestic Employees: 20 Harris Civil Engineers (HCE) understands the impact that its projects have on the environment, and is committed to providing designs that are environmentally and socially responsible both through

  7. Y-12 honors companies, advocates for small-business success ...

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

    honors companies, ... Y-12 honors companies, advocates for small-business success Posted: July 18, 2012 - 3:48pm The Y-12 National Security Complex honored six small businesses for...

  8. Y-12 honors its inventors with Technology Transfer awards | Y...

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

    Y-12 honors its inventors ... Y-12 honors its inventors with Technology Transfer awards Posted: July 22, 2015 - 11:31am Y-12 recently honored inventors at the eleventh annual...

  9. The Honorable Jeff Bingaman Chairman

    Energy Savers [EERE]

    11, 2008 The Honorable Jeff Bingaman Chairman Committee on Energy and Natural Resources United States Senate Washington, DC 20510-6150 Dear Mr. Chairman: Thank you for your May 12,2008, letter concerning the current and projected impacts of biofuels on food and gasoline prices, among other issues. We emphatically agree with the suggestion in your press release of May 15 concerning this letter that "it's wise for folks to catch their breath and get better educated on the complexities before

  10. The Honorable Stanley J. ,Esposito,

    Office of Legacy Management (LM)

    ' \ Department of Energy ~ Washing& DC 20585 JAN 13 igg5 The Honorable Stanley J. ,Esposito, 888 Washington Boulevard Stamford, Connecticut 06904 Dear Mayor.Esposito: Secretary:of Energy Hazel O!Leary has.announced a new approach to openness,in the Department of Energy (DOE)'and its communications with.the public!. In support of this initiative, we are.pleased to forward the enclosed information related to the .former American,Cyanamid Co; site in your jurisdiction that performed work for

  11. Northern New Mexico College Foundation honors LANL's Richard

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

    Mexico College Foundation honors LANL's Richard Marquez with leadership, service award October 4, 2012 Northern New Mexico College Foundation honors LANL's Richard Marquez with...

  12. Northern New Mexico College Foundation honors LANL's Richard...

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

    award LANL's Richard Marquez honored with leadership, service award Northern New Mexico College Foundation honors LANL's Richard Marquez. October 4, 2012 Rich Marquez Rich...

  13. NREL: News - Energy Department Honors Solar Decathlon Winners

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

    Department Honors Solar Decathlon Winners Saturday, October 5, 2002 Energy Department Honors Solar Decathlon Winners University of Colorado at Boulder Takes First in Solar ...

  14. Grand Junction Office Founder Honored at the Philip C. Leahy...

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

    Grand Junction Office Founder Honored at the Philip C. Leahy Memorial Park Dedication and Open House Grand Junction Office Founder Honored at the Philip C. Leahy Memorial Park ...

  15. Geothermal Energy Association Honors NREL's Dr. Bharathan for...

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

    Energy Association Honors NREL's Dr. Bharathan for Work in Condenser Technology Geothermal Energy Association Honors NREL's Dr. Bharathan for Work in Condenser Technology July 16,...

  16. Trillion Particle Simulation on Hopper Honored with Best Paper

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

    Trillion Particle Simulation on Hopper Honored with Best Paper Trillion Particle Simulation on Hopper Honored with Best Paper Berkeley Lab Researchers Bridge Gap to Exascale May...

  17. Berkeley Lab Climate Software Honored for Pattern Recognition...

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

    Climate Software Honored for Pattern Recognition Advances Berkeley Lab Climate Software Honored for Pattern Recognition Advances September 17, 2015 Contact: Kathy Kincade, +1 510 ...

  18. H Canyon's 60th Anniversary Event Honors Past, Celebrates Future...

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

    H Canyon's 60th Anniversary Event Honors Past, Celebrates Future at Savannah River Site H Canyon's 60th Anniversary Event Honors Past, Celebrates Future at Savannah River Site...

  19. Honors

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

    Members of the Technical Staff The Distinguised Members of Technical Staff (DMTS) classification, established in 2011, was created to serve as a career ladder for LLNL scientists...

  20. CENIC Honors ESnet's 100G Testbed

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

    CENIC Honors ESnet's 100G Testbed with 2015 Innovations in Networking Award News & Publications ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Media Jon Bashor, jbashor@lbl.gov, +1 510 486 5849 or Media@es.net Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net CENIC Honors

  1. Leadership | Department of Energy

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

    Leadership Leadership The Honorable LaDoris G. Harris Director, Office of Economic Impact and Diversity The Honorable La Doris "Dot" Harris brings over 30 years of management and leadership experience as the Director of the Office of Economic Impact and Diversity at the U.S. Department of Energy (DOE). She ensures that minorities and historically underrepresented communities are afforded opportunities to fully participate in the Department's programs. More about Dot Harris Andre H.

  2. Medal of Honor recipients honored at Y-12 | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration Medal of Honor recipients honored at Y-12 Tuesday, September 16, 2014 - 4:32pm Medal of Honor recipients Herschel "Woody" Williams (USMC, WWII, Iwo Jima), Ron Rosser (US Army, Ponggilli, Korea) and Wesley Fox (USMC, Quang Tri, Vietnam) were welcomed by CNS President Jim Haynes (far left) and NNSA Production Office Manager Steve Erhart (far right) at the Medal of Honor Town Hall Forum held at Y-12's New Hope Center last week. The three recipients discussed their

  3. 2008 News | Awards and Honors | NREL

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

    (NREL) took home high honors from Editors of R&D Magazine recently for two separate solar cell technologies that were named "the most revolutionary technologies of the year."...

  4. Small Business Administration Honors Oak Ridge Subcontractor

    Broader source: Energy.gov [DOE]

    OAK RIDGE, Tenn. – The U.S. Small Business Administration (SBA) recently honored an environmental cleanup company that supports Oak Ridge’s EM program as its Subcontractor of the Year in an eight-state region.

  5. Honoring Our Vets | Department of Energy

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

    Honoring Our Vets Honoring Our Vets November 10, 2011 - 5:52pm Addthis Secretary Steven Chu hosts more than a dozen former service members to thank them for their continued service to America. | Courtesy of the Energy Department Karissa Marcum Public Affairs Specialist, Office of Public Affairs Veterans from the Army, Air Force, Navy, Marine Corps and the National Guard who work at the Department of Energy met Wednesday with Secretary Steven Chu, who hosted more than a dozen former service

  6. DOE's Office of Nuclear Energy Honored

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

    DOE's Office of Nuclear Energy Honored The U.S. Department of Energy's Office of Nuclear Energy was among those honored by the Partnership for Science and Technology (PST) as winners in the fourth annual PST Energy Advocate Awards. The awards are presented to individuals or organizations that were central to a noteworthy achievement in energy, nuclear energy or an environmental field that is of interest to PST members. The awards were presented at the annual PST Awards Luncheon on February 21,

  7. Seven Los Alamos scientists earn AAAS honors

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

    Seven Los Alamos scientists earn AAAS honors Seven Los Alamos scientists earn AAAS honors The Fellows are Richard Sayre, John Gordon, Jeanne Robinson, Jaqueline Kiplinger, Bryon Goldstein, Alexander Balatsky and Quanxi Jia. December 15, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new

  8. 2009 News | Awards and Honors | NREL

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

    9 News Below are news stories related to Awards and Honors. RSS Learn about RSS. July 22, 2009 NREL Research Garners Three Prestigious R&D 100 Awards An ultra-accelerated weathering system, a parabolic trough solar concentrating collector, and a microbattery -- all developed in partnership with the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) -- were honored today as top 100 innovations for 2009 by R&D Magazine. February 17, 2009 Chuck Kutscher Receives

  9. Department of Energy Response to Correspondence from Mary Celeste Harris

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

    Related to District of Columbia Public Service Commission Docket No. EO-05-01 | Department of Energy Mary Celeste Harris Related to District of Columbia Public Service Commission Docket No. EO-05-01 Department of Energy Response to Correspondence from Mary Celeste Harris Related to District of Columbia Public Service Commission Docket No. EO-05-01 Docket No. EO-05-01: Department of Energy response to correspondence from Mary Celeste Harris related to District of Columbia Public Service

  10. COLLOQUIUM: Who Will Save the Tokamak - Harry Potter, Arnold...

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

    COLLOQUIUM: Who Will Save the Tokamak - Harry Potter, Arnold Schwarzenegger, Shaquille O'Neal, or Donald Trump? Professor Jeffrey Freidberg Massachusetts Institute of Technology ...

  11. Harris County, Georgia: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Harris County, Georgia Hamilton, Georgia Pine Mountain, Georgia Shiloh, Georgia Waverly Hall, Georgia West Point, Georgia Retrieved from "http:en.openei.orgw...

  12. The Geothermal Technologies Office Congratulates this Year's GEA Honors Awardees

    Broader source: Energy.gov [DOE]

    On December 10, the Geothermal Energy Association announced its 2013 GEA Honors awards for advances and achievements in geothermal energy. Among this year's eleven winners and honorable mentions are five projects that the Energy Department investe

  13. Honoring Our Veterans through Jobs in Solar Energy | Department...

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

    Honoring Our Veterans through Jobs in Solar Energy Honoring Our Veterans through Jobs in Solar Energy November 10, 2015 - 10:00am Addthis Solar Ready Vets, created by the ...

  14. Wirth Chair Honors NREL's Dan Arvizu - News Releases | NREL

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

    Dan Arvizu was honored at the 16th annual Wirth Chair Sustainability Awards Luncheon in Denver today. Dr. Dan E. Arvizu was honored at the 16th annual Wirth Chair Sustainability ...

  15. Breakthrough Prize Honors Neutrino Research | Jefferson Lab

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

    Breakthrough Prize Honors Neutrino Research The Daya Bay and Ling Ao nuclear power reactors, pictured here behind Bob McKeown, are located roughly 55 kilometers from Hong Kong. The Daya Bay and Ling Ao nuclear power reactors, pictured here behind Bob McKeown, are located roughly 55 kilometers from Hong Kong. Breakthrough Prize Honors Neutrino Research He missed the 'glitzy Oscars for science,' but that's OK with Bob McKeown. McKeown is the Governor's Distinguished CEBAF Professor in William

  16. EM Receives Several Honors in 2011 DOE Sustainability Awards

    Broader source: Energy.gov [DOE]

    Several EM employees, projects and teams were honored as part of the 2011 DOE Sustainability Awards announced this week.

  17. Professional Association Honors EM Employee with Technical Excellence Award

    Broader source: Energy.gov [DOE]

    An association with expertise in project cost and schedule management honored an EM employee with its Technical Excellence Award.

  18. Harris County- Green Building Policy for County Buildings

    Broader source: Energy.gov [DOE]

    The Harris County Facilities and Property Management (FPM) Division also requires all county buildings to meet minimum energy efficiency and sustainability measures, as described in the Best Gree...

  19. Harris Hill, New York: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. Harris Hill is a census-designated place in Erie County, New York.1 References US...

  20. Comments by Mary Celeste Harris on the Emergency Operation of...

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

    EO-05-01: Comments by Mary Celeste Harris on the Emergency Operation of Mirant's Potomac River Generating Station. "I am writing in response to your order of December 20, 2005, ...

  1. Summer 2012 Intern Project- Rachel Harris | Center for Energy Efficient

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

    Materials Rachel Harris INVESTIGATING DEGRADATION IN POLYMER SOLAR CELLS Rachel Harris UC Santa Barbara Mentor: Chris Liman Faculty Advisor: Michael Chabynic Department: Materials Performance degradation is a common problem faced by polymer photovoltaic cells. It is necessary to understand the origins of degradation processes in order to relieve the issue and increase the technology's potential for becoming a viable renewable energy resource. In this study, organic photovoltaic devices were

  2. Moore honored with American Statistical Association award

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

    American Statistical Association Award Moore honored with American Statistical Association award Lisa Moore is the recipient of the 2013 Don Owen Award presented by the American Statistical Association, San Antonio Chapter. May 24, 2013 Leslie "Lisa" Moore Leslie "Lisa" Moore The American Statistical Association (ASA) is the world's largest community of statisticians. It was founded in Massachusetts in 1839. Leslie "Lisa" Moore of the Laboratory's Statistical

  3. TO: Honorable Patricia Hoffman, Assistant Secretary for

    Energy Savers [EERE]

    TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery and Energy Reliability, U.S. Department of Energy FROM: Electricity Advisory Committee (EAC) Richard Cowart, Chair DATE: September 24, 2014 RE: Recommendations Regarding Emerging and Alternative Regulatory Models and Modeling Tools to Assist in Analysis Introduction For closely linked reasons (e.g. proliferation of distributed generation, advances in technology, desire to integrate renewable generation, customer

  4. The Honorable,Edward Rendell, '. City Hall

    Office of Legacy Management (LM)

    I:! i394 .\ . The Honorable,Edward Rendell, '. City Hall Philadelphia, Pennsylvania 19107 Dear Mayor Rendell : ', ,' . , Secretary of Energy Hazel O',teary has announced-a new approach.to.openness in the Department of Energy (DDE) and its communications with the public. . In support of this initiative, we are.pleased to forward the enclosed information related to the,former. Penn Salt Manufacturing' Co. site in your jurisdiction that performed.work for DOE or its predecessor agencies. This

  5. NSTec Honors Employees Project Management Excellence Award,

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

    Honors Employees Project Management Excellence Award, Performance Awards showcase outstanding work. Custodial staff show how they keep the NNSS clean and tidy. See page 4. See page 8. NNSS Responders Join FRMAC for Southern Exposure More than 60 federal and contractor employees joined state and local emergency officials in July for the Southern Exposure 2015 (SE-15) exercise in Florence, S.C. SE-15 was the largest national-level exercise at a nuclear power plant conducted since the terrorist

  6. NREL'S Zunger Receives Top Scientific Honors

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

    Top Scientific Honors For more information contact: Gary Schmitz, 303-275-4050 email: Gary Schmitz Golden, Colo., Nov. 29, 2000 - Alex Zunger, a physicist and research fellow at the U.S. Department of Energy's National Renewable Energy Laboratory, has been named the 2001 recipient of the prestigious Rahman Award by the American Physical Society (APS). The award from the APS is bestowed once annually to an individual for "outstanding achievement in computational physics research."

  7. NREL's Buildings Research Honored by Architecture Magazine

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

    NREL's Buildings Research Honored by Architecture Magazine For more information contact: Kerry Masson, (303) 275-4083 Golden, Colo., January 15, 1997—Architecture magazine's Progressive Architecture Award went to the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) and the Passive Solar Industries Council today for their joint efforts in designing energy-efficient buildings. The prestigious award is one of two given annually for outstanding contributions to architectural

  8. 2016 News | Awards and Honors | NREL

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

    2016 News Below are news stories related to Awards and Honors. RSS Learn about RSS. May 5, 2016 Energy Department Selects NREL Scientist for Exclusive Award Scientist Adele Tamboli of the Energy Department's (DOE) National Renewable Energy Laboratory (NREL) has been awarded additional funding as part of a select group of scientists in the early stage of their careers. May 3, 2016 NREL Scientists and Engineers Recognized for Top Innovations as Lab Celebrates another Record-Breaking Year of

  9. The,Honorable kenneth EL Reeves

    Office of Legacy Management (LM)

    Department of Energy. ' . Washington, DC 2058s i ,' ' . : -' ' . The,Honorable kenneth EL Reeves 795 Massachusetts. Avenue Cambridge, Massachusetts 02139 .( Dear Mayor Reeves: ., Secretary of Energy Hazel jO!Leary'has announced a new.approach to openness in the Department of 'Energy (DOE) and its communications with' the.publ:ic. In.. support ,of this initiative, we are pleased to forward the enclosed information related to,the Massachusetts Institute of Technology site,in your jurisdiction'

  10. NNSA Administrator honors nonproliferation research leader | National

    National Nuclear Security Administration (NNSA)

    Nuclear Security Administration Administrator honors nonproliferation research leader Monday, May 16, 2016 - 11:41am NNSA Administrator Lt. Gen. Frank G. Klotz (Ret.), right, presents the agency's Distinguished Service Gold Medal Award to Assistant Deputy Administrator for Nonproliferation Research and Development Dr. Rhys Williams. Last week DOE Under Secretary for Nuclear Security and NNSA Administrator Lt. Gen. Frank G. Klotz (Ret.) presented the agency's Assistant Deputy Administrator

  11. 2011 News | Awards and Honors | NREL

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

    1 News Below are news stories related to Awards and Honors. RSS Learn about RSS. December 15, 2011 NREL Scientists Report First Solar Cell Producing More Electrons In Photocurrent Than Solar Photons Entering Cell Researchers from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have reported the first solar cell that produces a photocurrent that has an external quantum efficiency greater than 100 percent when photoexcited with photons from the high energy region of the

  12. A Cornerstone of Our Energy Future: Women | Department of Energy

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

    A Cornerstone of Our Energy Future: Women A Cornerstone of Our Energy Future: Women March 19, 2014 - 1:47pm Addthis Secretary of Energy Ernest Moniz with The Honorable Dot Harris, Director of the Energy Department's Office of Economic Impact and Diversity (far left), and Sandra Guzman, award winning multimedia journalist, at the Minorities in Energy launch event. | Photo by the Energy Department. Secretary of Energy Ernest Moniz with The Honorable Dot Harris, Director of the Energy Department's

  13. DOE Science Showcase - Energy Department Scientists and Engineers Honored

    Office of Scientific and Technical Information (OSTI)

    with Presidential Early Career Awards (PECASE) | OSTI, US Dept of Energy, Office of Scientific and Technical Information Energy Department Scientists and Engineers Honored with Presidential Early Career Awards (PECASE) Researchers funded by the U.S. Department of Energy (DOE) Office of Science were recently honored with the Presidential Early Career Award for Scientists and Engineers (PECASE)-the highest honor bestowed by the U.S. government on outstanding scientists and engineers who are

  14. Federal Employees Honored for Saving $14 Million Through Energy Efficiency

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

    | Department of Energy Employees Honored for Saving $14 Million Through Energy Efficiency Federal Employees Honored for Saving $14 Million Through Energy Efficiency October 27, 2005 - 12:33pm Addthis Energy Department Receives Energy Saver Showcase Award for Superior Building Performance and Sustainable Construction WASHINGTON, D.C. - The U.S. Department of Energy (DOE) today honored 20 federal government employees, teams and organizations for saving more than $14 million in energy costs in

  15. Energy Department and Environmental Protection Agency Honor 2014 Energy

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

    Star Partners of the Year | Department of Energy and Environmental Protection Agency Honor 2014 Energy Star Partners of the Year Energy Department and Environmental Protection Agency Honor 2014 Energy Star Partners of the Year April 3, 2014 - 12:49pm Addthis NEWS MEDIA CONTACT (202) 586-4940 The U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE) are honoring 127 organizations for their commitment to protecting the environment through superior energy

  16. Los Alamos honors four for science leadership, research

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

    Los Alamos honors four for science leadership, research Los Alamos honors four for science leadership, research John Gordon, Geoffrey Reeves, Stephen Doorn and David Jablonski are honored for achievements. January 30, 2012 Left to right: David Jablonski, John Gordon, Stephen Doorn (seated), and Geoffrey Reeves Left to right: David Jablonski, John Gordon, Stephen Doorn (seated), and Geoffrey Reeves Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email Stars in hydrogen storage,

  17. Los Alamos physicist Hockaday honored for national security contributions

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

    Hockaday honored for national security contributions Los Alamos physicist Hockaday honored for national security contributions Hockaday earned a 2014 fellowship from the AAAS and also a Distinguished Alumni Award from the NMSU Alumni Association. December 9, 2014 Mary Hockaday Mary Hockaday Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "I have been truly surprised, humbled and honored by these awards; I greatly appreciate the folks who took to undertake my

  18. Los Alamos physicist honored by American Physical Society

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

    Physicist honored by American Physical Society Los Alamos physicist honored by American Physical Society George Kyrala is among a team honored with the American Physical Society's 2012 John Dawson Award for Excellence in Plasma Physics Research. August 29, 2012 George Kyrala George Kyrala Contact Communications Office (505) 667-7000 LOS ALAMOS, NEW MEXICO, August 29, 2012-Los Alamos National Laboratory physicist George Kyrala, along with researchers from Lawrence Livermore National Laboratory

  19. Los Alamos physicist honored with E.O. Lawrence Award

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

    Los Alamos physicist honored with E.O. Lawrence Award Los Alamos physicist honored with E.O. Lawrence Award John Sarrao is being honored by the U.S. Department of Energy with the 2013 Ernest O. Lawrence Award in Condensed Matter and Materials Sciences. April 16, 2014 John Sarrao John Sarrao Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "John Sarrao's exciting advances in actinide studies exemplify the quality of research performed at Los Alamos National

  20. NEJC Honors EJ Leaders and Pioneers | Department of Energy

    Energy Savers [EERE]

    Honors EJ Leaders and Pioneers NEJC Honors EJ Leaders and Pioneers PDF icon The National Environmental Justice Conference Honors EJ Leaders and Pioneers More Documents & Publications 2015 National Environmental Justice Conference and Training Program Concludes in Washington, DC Preparations Underway for the 2015 National Environmental Justice Conference & Training Program 2015 National Environmental Justice Conference and Training Program Call for PowerPoint/Video Presentation

  1. Energy Department Honored for Inroads in Geothermal Energy | Department of

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

    Energy Honored for Inroads in Geothermal Energy Energy Department Honored for Inroads in Geothermal Energy June 9, 2015 - 11:23am Addthis Energy Department Honored for Inroads in Geothermal Energy The Energy Department's geothermal office garnered five awards at the Geothermal Energy Association's (GEA) National Geothermal Summit on June 3, 2015, amidst a celebrated list of twelve sector trailblazers and industry standouts, including Ormat Technologies, Enel Green Power of North America, and

  2. Energy Department Scientists and Engineers Honored with Presidential Early

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

    Career Awards | Department of Energy Scientists and Engineers Honored with Presidential Early Career Awards Energy Department Scientists and Engineers Honored with Presidential Early Career Awards December 19, 2008 - 9:16am Addthis WASHINGTON, DC - At a White House ceremony today, eight "early career" researchers, funded by the U.S. Department of Energy's (DOE) Office of Science and the National Nuclear Security Administration (NNSA), were honored with the Presidential Early Career

  3. Y-12 earns communications honors | Y-12 National Security Complex

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

    earns communications ... Y-12 earns communications honors Posted: September 5, 2013 - 4:06pm The Y-12 National Security Complex received multiple communications awards during three...

  4. Y-12 earns communications honors | Y-12 National Security Complex

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

    earns communications ... Y-12 earns communications honors Posted: June 27, 2012 - 9:38am The Y-12 National Security Complex received multiple communications awards during two...

  5. First Lady Michelle Obama and Secretary Chu Honor Employees for...

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

    Service Recognition Week May 5, 2011 - 11:01am Addthis April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs In honor of Public Service...

  6. Medal of Honor recipient Colonel Bruce Crandall visits Y-12 ...

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

    the 2014 Medal of Honor Convention. Awarded the nation's highest award for military valor, Crandall flew more than 900 combat missions during the Vietnam War. His bravery in...

  7. Energy Secretary Moniz Honors ESnet's OSCARS Bandwidth Reservation...

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

    a DOE Secretarial Honor Award for their development of OSCARS, the On-demand Secure Circuits and Reservation System. OSCARS is a software service that creates dedicated bandwidth...

  8. National Nuclear Security Administration honors Y-12 employees...

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

    National Nuclear Security ... National Nuclear Security Administration honors Y-12 employees Posted: September 25, 2012 - 12:55pm Joining Oder (center) to present the awards was...

  9. Honoring the Legacy of Martin Luther King Jr.

    Broader source: Energy.gov [DOE]

    Employees across the Department honored Dr. Martin Luther King Jr. on Tuesday, saluting the civil rights legend during a lively ceremony at Department headquarters.

  10. Honoring Nuclear Security Workers on the National Day of Remembrance...

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

    Nuclear Security Workers on the National Day of Remembrance Honoring Nuclear Security Workers on the National Day of Remembrance October 31, 2011 - 11:54am Addthis Workers ...

  11. Department of Energy Honors Hanford Site Contractor for Employee...

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

    Site Contractor for Employee Involvement and Management Leadership in Safety and Health Department of Energy Honors Hanford Site Contractor for Employee Involvement and...

  12. 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 ...

  13. Christie Administration Honors Princeton Plasma Physics Lab As...

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

    top environmental stewards were honored during a ceremony Monday. The DEP also recognized Colgate Palmolive Co. in Piscataway, Bristol Myers Squibb Co. in Hopewell, LP Thebault...

  14. Cristal Jones-Harris | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Aeronautics and Space Administration Hometown: Sandy Springs, GA Cristal Jones-Harris, Ed. ... Jones-Harris has an Ed.D. from Georgia Southern University and a B.A. from Clark Atlanta ...

  15. Magoon v. Harris, 46 Vt. 264, 269 (1863) | Open Energy Information

    Open Energy Info (EERE)

    Magoon v. Harris, 46 Vt. 264, 269 (1863) Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal CaseHearing: Magoon v. Harris, 46 Vt. 264, 269 (1863)Legal...

  16. Education Seeks Projects for Summer Honors Interns | Jefferson Lab

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

    Education Seeks Projects for Summer Honors Interns Education Seeks Projects for Summer Honors Interns; Send Ideas/Proposals in by May 2 Six to eight outstanding high school students will be selected to participate in the lab's 2016 High School Summer Honors Program, which will be held at the lab from June 27 through August 5. These students have a strong academic record and are excited to have the opportunity to dive in and learn about the lab's science and technology, according to Brita

  17. Video: Honoring Science that Matters with the Enrico Fermi Award |

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

    Department of Energy Honoring Science that Matters with the Enrico Fermi Award Video: Honoring Science that Matters with the Enrico Fermi Award February 11, 2014 - 9:50am Addthis The Fermi Award is a Presidential award and is one of the oldest and most prestigious science and technology honors bestowed by the U.S. Government. The 2013 winners of the award are Dr. Allen J. Bard, of The University of Texas at Austin, and Dr. Andrew Sessler of the Lawrence Berkeley National Laboratory. Ben

  18. Secret City honor | Y-12 National Security Complex

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

    Secret City honor Secret City honor Posted: June 17, 2014 - 4:56pm B&W Y-12 President and General Manager Dave Richardson receives a framed proclamation and key to the city from Oak Ridge Mayor Tom Beehan. The city honored B&W Y-12 for 10 years of support for the Secret City Festival. Photo by Scott Fraker B&W Y-12 was recognized at this year's Secret City Festival opening ceremony for its 10 years of support for the festival. With contributions of more than $250,000, B&W Y-12

  19. NREL Senior Research Fellow Honored by The Journal of Physical...

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

    who does all of their research at a national laboratory. "I am grateful to the editorial board of The Journal of Physical Chemistry for this great honor and especially to...

  20. KCP's Carey honored as 2014 Black Achiever | National Nuclear...

    National Nuclear Security Administration (NNSA)

    KCP's Carey honored as 2014 Black Achiever Anthony Carey is not just focused on developing the next generation of Test Systems for our nation's military; he's also focused on ...

  1. Hydrogen and Fuel Cell Mentors Honored as Outstanding | Awards...

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

    Hydrogen and Fuel Cell Mentors Honored as Outstanding June 5, 2015 Photo of two women and one man posing for a photo in front of a scientific poster. (Left to Right) Huyen Dinh,...

  2. Honoring Our Veterans Today and Year-Round

    Broader source: Energy.gov [DOE]

    Whether through energy job training programs or advanced manufacturing initiatives, the Department of Energy is working to honor veterans of our nation's armed forces every day of the year.

  3. Energy Secretary Honors EM Employee for Outstanding Safety Oversight

    Broader source: Energy.gov [DOE]

    Energy Secretary Ernest Moniz, center, recently honored EM employee Robert (Dennis) Yates from the Savannah River Operations Office, right, as DOE’s Facility Representative of the Year for 2013.

  4. Request Photos from 2011 Secretarial Honor Awards Program

    Broader source: Energy.gov [DOE]

    To facilitate the distribution of photographs from the 2011 Secretarial Honor Awards Program, held in the Forrestal Building, Washington, D.C. on October 27, 2011, posted here are 1) proof sheets...

  5. PPPL's science lecture debuts Jan. 10 with new name honoring...

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

    PPPL's science lecture debuts Jan. 10 with new name honoring long-time organizer By Jeanne ... The late Ron Hatcher hosted PPPL's Science on Saturday lectures. (Photo by Photo by ...

  6. Materials Professor Honored with AVS Welch Award, Donates Funds...

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

    the 2013 AVS Medard W. Welch Award, the premier honor given by AVS, the Science and Technology society. Van de Walle will receive the award at the AVS 60th International Symposium...

  7. National Day of Remembrance HSS Honors Former Nuclear Weapons...

    Energy Savers [EERE]

    On Friday, October 25th 2013, HSS honored over 150 nuclear weapons program workers at the National Atomic Testing Museum (NATM). Hosted by NATM Director Allan Palmer, the event was ...

  8. Women of Wind Energy Honor Wind Program Researchers | Department...

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

    This is an excerpt from the Second Quarter 2013 edition of the Wind Program R&D Newsletter. Chicago, Illinois-The Women of Wind Energy (WoWE) honored Ian Baring-Gould, Wind ...

  9. NERSC Honors Third Annual HPC Achievement Award Winners

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

    Honors Third Annual HPC Achievement Award Winners NERSC Honors Third Annual HPC Achievement Award Winners February 24, 2015 2015 NERSC award winners Third annual NERSC HPC Achievement Award winners: (left to right) Taylor Barnes, Caltech; Carlo Benedetti, Berkeley Lab BELLA program; and Ken Chen, UC Santa Cruz. Not pictured: Craig Tull, SPOT Suite project. The Department of Energy's National Energy Research Scientific Computing Center (NERSC) announced the winners of its third annual High

  10. NERSC Staff Honored with Director's Awards for Exceptional Achievement

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

    Staff Honored with Director's Awards for Exceptional Achievement NERSC Staff Honored with Director's Awards for Exceptional Achievement September 14, 2015 Jon Bashor, jbashor@lbl.gov, 510-486-5849 Directors-Awards.jpg The award recipeients: (Top row, clockwise) Deborah Agarwal (CRD), Eli Dart (ESnet), Brent Draney (NERSC), Lynne Rippe (NERSC) and James Sethian (CRD). Five employees in the Computing Sciences organization are recipients of this year's Director's Awards for Exceptional Achievement,

  11. Trillion Particle Simulation on Hopper Honored with Best Paper

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

    Trillion Particle Simulation on Hopper Honored with Best Paper Trillion Particle Simulation on Hopper Honored with Best Paper Berkeley Lab Researchers Bridge Gap to Exascale May 31, 2013 Contact: Linda Vu, lvu@lbl.gov, (510) 495-2402 VPIC1.jpg Image by Oliver Rubel, Berkeley Lab. An unprecedented trillion-particle simulation, which utilized more than 120,000 processors and generated approximately 350 terabytes of data, pushed the performance capability of the National Energy Research Scientific

  12. Hispanic Heritage Month - Honoring a Heritage and Individual Success |

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

    Department of Energy Hispanic Heritage Month - Honoring a Heritage and Individual Success Hispanic Heritage Month - Honoring a Heritage and Individual Success October 10, 2012 - 9:59am Addthis Dr. Karina Edmonds, the Department's Technology Transfer Director, speaks with Joan Michelson of Green Connections Radio about women in STEM last July. This week she is receiving a Career Achievement Award from Women of Color Magazine. Dr. Karina Edmonds, the Department's Technology Transfer Director,

  13. Honoring Hispanic Heritage Month and Renewing the American Dream |

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

    Department of Energy Honoring Hispanic Heritage Month and Renewing the American Dream Honoring Hispanic Heritage Month and Renewing the American Dream September 15, 2011 - 11:03am Addthis Bill Valdez Bill Valdez Director of Workforce Management Today we kick-off Hispanic Heritage Month, celebrating under the theme of "Renewing the American Dream." The Energy Department joins the rest of the Administration in participating in a series of events that reflect various factors of the

  14. Physicist honored with new APS award | Princeton Plasma Physics Lab

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

    Physicist honored with new APS award By Jeanne Jackson DeVoe December 10, 2014 Tweet Widget Google Plus One Share on Facebook Ilya Dodin Ilya Dodin It's fitting that Theory Department physicist Ilya Dodin was the first to receive the American Physical Society's Thomas H. Stix Award for Outstanding Early Career Contributions to Plasma Physics Research. Dodin, honored at the annual APS-Division of Plasma Physics meeting in New Orleans in October, was recognized for his research on waves in

  15. Thirteen Department of Energy Researchers Honored with the Presidential

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

    Early Career Award for Scientists and Engineers | Department of Energy Energy Researchers Honored with the Presidential Early Career Award for Scientists and Engineers Thirteen Department of Energy Researchers Honored with the Presidential Early Career Award for Scientists and Engineers September 26, 2011 - 5:21pm Addthis WASHINGTON, D.C. - President Obama named 13 U.S. Department of Energy (DOE) researchers as recipients of the Presidential Early Career Award for Scientists and Engineers

  16. White House Meeting Honors New Superior Energy Performance Members |

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

    Department of Energy Superior Energy Performance » White House Meeting Honors New Superior Energy Performance Members White House Meeting Honors New Superior Energy Performance Members December 13, 2013 - 11:39am Addthis New Superior Energy Performance (SEP) members 3M Company, Cummins Inc., General Dynamics OTS, Nissan, Schneider Electric, and Volvo Group North America from industry, and the Bonneville Power Administration, Efficiency Vermont, and Northeast Utilities (Connecticut Light

  17. American Institute of Chemical Engineers Honors DOE Researcher | Department

    Energy Savers [EERE]

    of Energy American Institute of Chemical Engineers Honors DOE Researcher American Institute of Chemical Engineers Honors DOE Researcher August 6, 2009 - 1:00pm Addthis Washington, DC - For his efforts in modeling and simulating fluid-particle flows, a researcher at the Office of Fossil Energy's National Energy Technology Laboratory (NETL) has been selected to receive the American Institute of Chemical Engineers' (AIChE) Fluidized Processing Recognition Award. AIChE presents the award every

  18. NREL Analyst Honored with WREC Pioneer Award - News Releases | NREL

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

    Analyst Honored with WREC Pioneer Award September 6, 2006 Photo of Barbara Farhar Barbara Farhar Barbara Farhar, senior policy analyst with the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL), received a 2006 Pioneer Award at the World Renewable Energy Congress (WREC) on Aug. 23 in Florence, Italy. The Pioneer Awards honor individuals for their contribution to advancing renewable energy through research, teaching and promotion. Farhar was recognized for her

  19. NREL Expert Honored for Energy Systems Innovations - News Releases | NREL

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

    Expert Honored for Energy Systems Innovations Analyst named to editorial board; green data center and window air conditioning analysis also lauded January 6, 2014 Photo of Dr. Ben Kroposki Dr. Ben Kroposki, director of Energy Systems Integration at NREL. The Energy Department's National Renewable Energy Laboratory (NREL) recently won several prestigious awards, including honors for innovations in window air-conditioning efficiency, data sharing, and its energy-efficient computer data center. Ben

  20. NREL Researcher Honored with Hispanic STEM Award - News Releases | NREL

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

    NREL Researcher Honored with Hispanic STEM Award Santiago Grijalva will direct grid research portfolio for NREL's Energy System Integration Facility October 24, 2013 A national organization devoted to getting more Hispanics into the fields of science, technology, engineering, and math (STEM), has honored a scientist at the Energy Department's National Renewable Energy Laboratory (NREL) with its annual Outstanding Technical Achievement Award. Santiago Carlos Grijalva is NREL's new director of the

  1. NREL's Bharathan honored by Geothermal Energy Association - News Releases |

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

    NREL NREL's Bharathan honored by Geothermal Energy Association Engineer recognized for development of condenser technology July 2, 2012 Dr. Desikan Bharathan Dr. Desikan Bharathan Dr. Desikan Bharathan, a principal engineer with the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), has been recognized with a GEA Honors Award by the Geothermal Energy Association (GEA). The awards program gives special recognition to companies and individuals who have made notable

  2. Department of Energy Honors ENERGY STAR® Partners | Department of Energy

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

    ENERGY STAR® Partners Department of Energy Honors ENERGY STAR® Partners March 21, 2006 - 3:49pm Addthis Leaders recognized for energy efficiency efforts WASHINGTON , D.C.- U.S. Department of Energy (DOE) Secretary Samuel W. Bodman and Environmental Protection Agency (EPA) Administrator Stephen L. Johnson tonight will honor 67 businesses, groups and government entities for their accomplishments and leadership in the ENERGY STAR® program. Organizations recognized have achieved major energy

  3. Christie Administration Honors Princeton Plasma Physics Lab As New Jersey's

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

    Top Environmental Steward | Princeton Plasma Physics Lab Christie Administration Honors Princeton Plasma Physics Lab As New Jersey's Top Environmental Steward May 21, 2013 Tweet Widget Google Plus One Share on Facebook The Christie Administration has honored the U.S. Department of Energy's Princeton Plasma Physics Laboratory as the state's top environmental steward in a Department of Environmental Protection program that encourages companies and facilities to go above and beyond regulatory

  4. Peter Nugent and Elizabeth Bautista Honored for Exceptional Achievement

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

    Peter Nugent and Elizabeth Bautista Honored for Exceptional Achievement Peter Nugent and Elizabeth Bautista Honored for Exceptional Achievement August 12, 2013 Peter Nugent (left) accepting award from Eddy Rubin. (right). Peter Nugent and Elizabeth Bautista of the National Energy Research Scientific Computing Center (NERSC) have been recognized with Lawrence Berkeley National Laboratory (Berkeley Lab) Director's Awards of Exceptional Achievement. The awards were presented Aug. 8 in a ceremony in

  5. Berkeley Lab Climate Software Honored for Pattern Recognition Advances

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

    Climate Software Honored for Pattern Recognition Advances Berkeley Lab Climate Software Honored for Pattern Recognition Advances September 17, 2015 Contact: Kathy Kincade, +1 510 495 2124, kkincade@lbl.gov The Toolkit for Extreme Climate Analysis (TECA), developed at Lawrence Berkeley National Laboratory to help climate researchers detect extreme weather events in large datasets, has been recognized for its achievements in solving large-scale pattern recognition problems. "TECA: Petascale

  6. Smith and Lee earn LAS honors | The Ames Laboratory

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

    Smith and Lee earn LAS honors Ames Laboratory scientists Emily Smith and Young-Jin Lee have earned honors from Iowa State University's College of Liberal Arts and Sciences. Smith was named the inaugural recipient of the LAS Dean's Emerging Faculty Leader Award and Lee was given the 2016 Trapp Innovation Award which provides funding to a faculty member who is pursuing new or unusual research in chemistry or the physical sciences. Read more about SMITH and LEE.

  7. Los Alamos physicist Hockaday honored for national security contributions

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

    Los Alamos physicist Hockaday honored for national security contributions Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues » submit Los Alamos physicist Hockaday honored for national security contributions Hockaday earned a 2014 fellowship from the AAAS and also a Distinguished Alumni Award from the NMSU Alumni Association January 1, 2015 Mary Hockaday Mary Hockaday Contact Linda Anderman Email Associate Director for

  8. Obama Administration Honors Department of Energy Scientists and Engineers

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

    with Presidential Early Career Awards | Department of Energy Honors Department of Energy Scientists and Engineers with Presidential Early Career Awards Obama Administration Honors Department of Energy Scientists and Engineers with Presidential Early Career Awards November 8, 2010 - 12:00am Addthis WASHINGTON, D.C. - The Obama Administration has named 13 U.S. Department of Energy researchers as recipients of the Presidential Early Career Award for Scientists and Engineers (PECASE). This is

  9. Energy Department Honors Savannah River Site Project Team with

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

    Secretary's Award | Department of Energy Honors Savannah River Site Project Team with Secretary's Award Energy Department Honors Savannah River Site Project Team with Secretary's Award April 14, 2016 - 1:30pm Addthis Pictured, left to right: Pam Marks, Federal Project Director, DOE-Savannah River Salt Waste Processing Facility Project Office (SWPFPO); Mary Ann Hopkins, President, Parsons Government Services, Inc.; Elizabeth Sherwood-Randall, DOE Deputy Secretary; Kim Rapp, Project Controls

  10. WIPP's Mine Rescue Team Wins Top Honors at National Competition

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

    October 8, 2015 WIPP's Mine Rescue Team Wins Top Honors at National Competition The Waste Isolation Pilot Plant (WIPP) Blue Mine Rescue team competed in the Missouri Regional Underground Mine Rescue Competition last week bringing home top honors in the field and first aid competitions. They also took the "Best Out of State" and the Governor's traveling trophy. The competition included 22 nationally ranked mine rescue teams representing Nevada, Colorado, Wyoming, Kansas, Missouri,

  11. Ten Los Alamos scientists honored by American Physical Society

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

    Scientists honored by American Physical Society Ten Los Alamos scientists honored by American Physical Society Tariq Aslam, Steven Batha, Eric Bauer, Hou-Tong Chen, Diego Alejandro Dalvit, Dinh Nguyen, Alan Perelson, Filip Ronning, Alexander Saunders and Glen Wurden were named this week by the national organization. November 12, 2015 Tariq Aslam, Steven Batha, Eric Bauer, Hou-Tong Chen, Diego Alejandro Dalvit, Dinh Nguyen, Alan Perelson, Filip Ronning, Alexander Saunders and Glen Wurden Tariq

  12. COLLOQUIUM: Who Will Save the Tokamak - Harry Potter, Arnold

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

    Schwarzenegger, Shaquille O'Neal, or Donald Trump? | Princeton Plasma Physics Lab January 20, 2015, 1:30pm to 3:00pm Colloquia MBG Auditorium COLLOQUIUM: Who Will Save the Tokamak - Harry Potter, Arnold Schwarzenegger, Shaquille O'Neal, or Donald Trump? Professor Jeffrey Freidberg Massachusetts Institute of Technology Presentation: File Presentation This paper attempts to bridge the gap between tokamak reactor design and plasma physics. The analysis demonstrates that the overall design of a

  13. Comments by Mary Celeste Harris on the Emergency Operation of Mirant's

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

    Potomac River Generating Station. | Department of Energy Mary Celeste Harris on the Emergency Operation of Mirant's Potomac River Generating Station. Comments by Mary Celeste Harris on the Emergency Operation of Mirant's Potomac River Generating Station. Docket No. EO-05-01: Comments by Mary Celeste Harris on the Emergency Operation of Mirant's Potomac River Generating Station. "I am writing in response to your order of December 20, 2005, declaring the emergency operation of Mirant's

  14. Y-12 honors 9-11's fallen heroes | National Nuclear Security...

    National Nuclear Security Administration (NNSA)

    Photo Gallery Jobs Apply for Our Jobs Our Jobs Working at NNSA Blog Home NNSA Blog Y-12 honors 9-11's fallen heroes Y-12 honors 9-11's fallen heroes Local firefighters and...

  15. Honoring 20 years of the Tennessee Valley Coridor | Y-12 National...

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

    Honoring 20 years of the ... Honoring 20 years of the Tennessee Valley Coridor The mp4 video format is not supported by this browser. Download video Captions: On Time: 4:58 min. ...

  16. Secretary’s Honor Awards Recognize EM’s Tank Cleanup, Closure

    Broader source: Energy.gov [DOE]

    WASHINGTON, D.C. – The Energy Department honored EM for achievements in its work to close high-level radioactive waste tanks as part of the annual Secretarial Honor Awards Ceremony Monday.

  17. Two PPPL physicists elected to receive prestigious honor | Princeton Plasma

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

    Physics Lab Two PPPL physicists elected to receive prestigious honor By Jeanne Jackson DeVoe October 17, 2013 Tweet Widget Google Plus One Share on Facebook David Gates was one of two PPPL physicists, along with Charles Skinner, to receive the prestigious honor of being named as an American Physical Society fellow. Gates is pictured here in front of the magnetic core of the National Spherical Torus Experiment Upgrade (NSTX-U) with a vessel of the National Compact Stellarator Experiment

  18. DOE Shares Funding Opportunities and Honors Small Business Award Recipients

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

    | Department of Energy DOE Shares Funding Opportunities and Honors Small Business Award Recipients DOE Shares Funding Opportunities and Honors Small Business Award Recipients July 22, 2011 - 4:19pm Addthis May 11, 2011 The U.S. Department of Energy, the largest civilian contracting agency within the Federal government, is holding its 12th Annual Small Business Conference & Expo at the Kansas City Convention Center in Kansas City, Missouri from May 10-12, 2011. Drawing more than 1,600

  19. Energy Secretary Moniz Honors ESnet's OSCARS Bandwidth Reservation

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

    Service Energy Secretary Moniz Honors ESnet's OSCARS Bandwidth Reservation Service News & Publications ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Media Jon Bashor, jbashor@lbl.gov, +1 510 486 5849 or Media@es.net Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net

  20. R&D 100 Awards Honor NREL Research

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

    R&D 100 Awards Honor NREL Research For more information contact: George Douglas 303-275-4096 e-mail: George Douglas Golden, Colo., Sept. 21, 1999 — Researchers at the U.S. Department of Energy's National Renewable Energy Laboratory will be honored Thursday with two R&D 100 awards. The awards are given each year by the editors of R&D Magazine for what they consider to be among the year's 100 most significant innovations. For 1999, the magazine identified NREL's Advanced

  1. Energy Department Assistant Secretary Danielson Honors Stevens Institute of

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

    Technology as Winner of U.S. Department of Energy Solar Decathlon | Department of Energy Danielson Honors Stevens Institute of Technology as Winner of U.S. Department of Energy Solar Decathlon Energy Department Assistant Secretary Danielson Honors Stevens Institute of Technology as Winner of U.S. Department of Energy Solar Decathlon October 17, 2015 - 4:08pm Addthis Stevens Institute of Technology won the U.S. Department of Energy Solar Decathlon 2015 today at Orange County Great Park in

  2. MEMORANDUM TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery

    Energy Savers [EERE]

    MEMORANDUM TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery and Energy Reliability, U.S. Department of Energy FROM: Electricity Advisory Committee (EAC) Richard Cowart, Chair DATE: September 24, 2014 RE: Status and Recommendations for Electricity Delivery Workforce _________________________________________________________________________ Introduction In October, 2012 the EAC submitted a paper to the Secretary of the U.S. Department of Energy recommending actions that

  3. TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery

    Energy Savers [EERE]

    Figure 1 TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery and Energy Reliability, U.S. Department of Energy FROM: Electricity Advisory Committee (EAC) Richard Cowart, Chair DATE: September 30, 2015 RE: Grid Modernization: ARRA Accomplishments and Recommendations for Moving Forward ________________________________________________________________________ 1 Background and Purpose The U.S. Department of Energy (DOE)'s smart grid portion of the American Reinvestment and

  4. DOE Projects Receive Honors for Best Geothermal Presentations

    Broader source: Energy.gov [DOE]

    Eleven DOE-funded projects presented at the Geothermal Resources Council (GRC) 2011 Annual Meeting in San Diego received honors for "outstanding presentations." The judging criteria included the quality of the visual aids as well as the ability to communicate the subject matter.

  5. Microsoft Word - ex parte memo deLaski Harris.doc

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

    On Friday, November 12 th , I spoke with DOE General Counsel Scott Blake Harris by telephone. This conversation concerned what process DOE might use for completing the new test ...

  6. 4 Questions for a Better Buildings Case Competition Student Participant: Harry Bergmann

    Broader source: Energy.gov [DOE]

    Meet Harry Bergmann, recent graduate of the University of California at Santa Barbara find out how the Better Buildings Case Competition helped him prepare for his new career in the clean energy sector.

  7. Jefferson County honors NREL with Genesis Award - News Releases | NREL

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

    Jefferson County honors NREL with Genesis Award March 7, 2003 Golden, CO. - The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) has received the Jefferson Economic Council's (JEC) Genesis Award for the Lab's contribution to the economic vitality of Jefferson County and its citizens. The annual award is given on behalf of Jefferson County in recognition of outstanding economic development that has significantly added to the long-term vitality of the county. NREL was

  8. High School Girls Honored for Math, Science Achievements

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

    School Girls Honored for Math, Science Achievements - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste

  9. 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

  10. 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)

  11. PPPL honors physicists Steven Sabbagh and Gregory Hammett | Princeton

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

    Plasma Physics Lab PPPL honors physicists Steven Sabbagh and Gregory Hammett By John Greenwald May 28, 2013 Tweet Widget Google Plus One Share on Facebook From left: Steven Sabbagh and Gregory Hammett (Photo by Elle Starkman/ PPPL Office of Communications) From left: Steven Sabbagh and Gregory Hammett Gallery: Steven Sabbagh (Photo by Elle Starkman/ PPPL Office of Communications) Steven Sabbagh Gregory Hammett (Photo by Elle Starkman/ PPPL Office of Communications) Gregory Hammett PPPL

  12. Physicist honored with Argonne's 2013 WIST Diversity Award | Argonne

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

    National Laboratory Women in Science and Technology (WIST) aims to promote the success of women in scientific and technical positions at Argonne. Physicist honored with Argonne's 2013 WIST Diversity Award January 28, 2014 Tweet EmailPrint On January 16, physicist Kawtar Hafidi was presented with Argonne's 2013 Women in Science and Technology (WIST) Diversity Award. The annual award acknowledges employees who have demonstrated extraordinary commitment to diversity at Argonne and innovative

  13. BETO-Funded Team Honored by the American Chemical Society

    Broader source: Energy.gov [DOE]

    Two Pacific Northwest National Laboratory (PNNL) scientists were part of a team honored at the 249th American Chemical Society (ACS) National Meeting & Exposition on March 25, 2015. The team, which consisted of John Frye and Alan Zacher of PNNL and Todd Werpy of Archer Daniels Midland Company, received the ACS Award for Affordable Green Chemistry for creating a safe, commercial process for producing propylene glycol from renewable sources.

  14. Energy Department Scientists and Engineers Honored with Presidential Early

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

    Career Awards | U.S. DOE Office of Science (SC) Energy Department Scientists and Engineers Honored with Presidential Early Career Awards News News Home Featured Articles Science Headlines 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Highlights Presentations & Testimony News Archives Communications and Public Affairs Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 12.19.08 Energy

  15. The Honorable Ernest Moniz Secretary, United States Department of Energy

    Energy Savers [EERE]

    ME1 19100572v.1 October 22, 2014 The Honorable Ernest Moniz Secretary, United States Department of Energy 1000 Independence Avenue, SW Washington, D.C. 20585 RE: Separate Product Classes for Non-Weatherized Residential Gas Furnaces Dear Secretary Moniz: Thank you for the opportunity to brief your staff in recent weeks on an impact analysis of a national condensing furnace standard, which was conducted jointly by the American Gas Association (AGA), the American Public Gas Association (APGA), and

  16. TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery

    Energy Savers [EERE]

    TO: Honorable Patricia Hoffman, Assistant Secretary for Electricity Delivery and Energy Reliability, U.S. Department of Energy FROM: Electricity Advisory Committee (EAC) Richard Cowart, Chair DATE: September 25, 2014 RE: Expanding and Modernizing the Electric Power Delivery System for the 21 st Century Introduction The United States electricity system is undergoing more change than it has in many decades. The causes are numerous: a changing mix of resources driven by lowering prices, climate

  17. NREL Employees Honored at Annual Awards Luncheon - News Releases | NREL

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

    NREL Employees Honored at Annual Awards Luncheon April 18, 2006 Golden, Colo. & During the past 25 years at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), Bob Noun and Walter Short have shaped the way renewable energy and energy efficient technologies are seen and understood by the public, elected officials and other stakeholders. With a realistic and technically sound vision of the potential of renewable energy, Noun has built strategic national and

  18. NREL Employees Honored by Industry Associations - News Releases | NREL

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

    Employees Honored by Industry Associations February 21, 2013 The U.S. Department of Energy's (DOE)'s National Renewable Energy Laboratory (NREL) and its employees have garnered new awards and recognition from industry groups for advancing energy efficiency and renewable energy research. NREL Engineer Named New Face of Engineering NREL Engineer Ian Metzger has been named by the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) as its New Face of Engineering. The

  19. NREL Recognizes Solar Pioneer with National Honor - News Releases | NREL

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

    NREL Recognizes Solar Pioneer with National Honor Annan Directed Federal Research Efforts for More Than Two Decades November 23, 2004 Golden, Colo. - The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) has presented the 2004 Paul Rappaport Renewable Energy and Energy Efficiency Award to Robert "Bud" Annan, who oversaw government-sponsored research into solar energy for more than 20 years. Annan is credited with conceiving and directing research programs that

  20. NREL'S Morgan-Smith Honored by Martin Luther King Commission

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

    NREL'S Morgan-Smith Honored by Martin Luther King Commission For more information contact: Sarah Holmes Barba, 303-275-3023 email: Sarah Barba Golden, Colo., Jan. 9, 2001 - Syl Morgan-Smith, Colorado Governmental Relations Manager with the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), will receive the Trailblazer Award from the Colorado Martin Luther King Commission. This award and seven other humanitarian awards will be presented during the Commission's Annual Martin

  1. NREL: Geothermal Technologies - Geothermal Energy Association Honors Two

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

    NRELians with Top Recognition Geothermal Energy Association Honors Two NRELians with Top Recognition June 10, 2015 Dan Getman and Jordan Macknick were recognized by the Geothermal Energy Association (GEA) during its National Geothermal Summit on June 3, 2015, in Reno, Nevada. Each year, GEA selects companies and individuals who have advanced technology, spurred economic development, and worked to protect the environment during the past year. Dan developed, in collaboration with the U.S.

  2. Y-12 honors its inventors with Technology Transfer awards | National

    National Nuclear Security Administration (NNSA)

    Nuclear Security Administration Y-12 honors its inventors with Technology Transfer awards Tuesday, July 28, 2015 - 8:35am NNSA Blog , Twenty-nine Y-12 inventors were recognized for their technology and innovation during the recent 11th Annual Technology Transfer Awards. The site has long been producing technologies initially used at Y-12 and later transferred to the private sector. NNSA Blog The patents that were awarded were in areas ranging from nuclear material simulation devices to

  3. Centauri High School Teacher Honored as Colorado Outstanding Biology

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

    Cement (2010 MECS) Cement (2010 MECS) Manufacturing Energy and Carbon Footprint for Cement Sector (NAICS 327310) Energy use data source: 2010 EIA MECS (with adjustments) Footprint Last Revised: February 2014 View footprints for other sectors here. Manufacturing Energy and Carbon Footprint PDF icon Cement More Documents & Publications MECS 2006 - Cement Glass and Glass Products (2010 MECS) Textiles Teacher

    Centauri High School Teacher Honored as Colorado Outstanding Biology Teacher For

  4. Stantec Receives Engineering Industry's Highest Honor for DOE/NREL's

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

    Research Support Facility - News Releases | NREL Stantec Receives Engineering Industry's Highest Honor for DOE/NREL's Research Support Facility American Council of Engineering Companies lauds designers for setting national example for sustainability on commercial properties April 4, 2011 Stantec's engineering design and sustainability consulting for one of the country's largest highly efficient buildings-the Research Support Facility (RSF) on the campus of the U.S. Department of Energy's

  5. IEEE honors two Sandia researchers as fellows | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration IEEE honors two Sandia researchers as fellows Tuesday, April 29, 2014 - 12:07pm Sandia National Laboratories researchers Mike Cuneo and Igal Brener have been selected Fellows of the Institute of Electrical and Electronics Engineers (IEEE). Cuneo was selected for "developments in inertial confinement fusion with magnetically-driven-implosions and electrode cleaning." Over the course of his 25-year Sandia career, he has pursued the goal of pulsed-power-driven

  6. Princeton Plasma Physics Laboratory Honors Three Researchers | Princeton

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

    Plasma Physics Lab Princeton Plasma Physics Laboratory Honors Three Researchers March 12, 2012 Tweet Widget Google Plus One Share on Facebook Gallery: Kenneth Hill received the Kaul Prize for Excellence in Plasma Physics Research and Technology Development. (Photo by Elle Starkman, PPPL Office of Communications) Kenneth Hill received the Kaul Prize for Excellence in Plasma Physics Research and Technology Development. Robert Ellis received the PPPL Distinguished Engineering Fellow award.

  7. Energy Department Early Career Scientists and Engineers Honored |

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

    Department of Energy June 13, 2005 - 4:50pm Addthis WASHINGTON, DC -- At an awards ceremony today, nine "early career" researchers funded by the Department of Energy (DOE) and its National Nuclear Security Administration (NNSA) were honored for their work ranging from the development and synthesis of nanoscale materials to improved medical diagnostic imaging. DOE's scientists are among 58 researchers supported by eight federal departments and agencies receiving the Presidential

  8. Energy Department Early Career Scientists and Engineers Honored |

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

    Department of Energy November 1, 2007 - 4:21pm Addthis WASHINGTON, DC - At a White House ceremony today, eight "early career" researchers, funded by the U.S. Department of Energy's (DOE) Office of Science and its National Nuclear Security Administration (NNSA), were honored for their work ranging from computer vision and machine intelligence to identifying genetic switches in the human genome. DOE's scientists are among 58 researchers supported by nine federal departments and

  9. Final - WIPP Honored at Sustainable Business Summit 2013

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

    For Immediate Release WIPP Honored for Sustainability CARLSBAD, N.M., September 18, 2013 - The U.S. Department of Energy's (DOE) Waste Isolation Pilot Plant (WIPP) was recognized as one of two finalists at the New Mexico Sustainable Business Summit held in Albuquerque in August 2013. The second annual summit, presented by Albuquerque Business First and the New Mexico Green Chamber of Commerce (NMGCC), is a business expo and awards luncheon to recognize organizations that have "green"

  10. Y-12 honors its inventors with Technology Transfer awards | National

    National Nuclear Security Administration (NNSA)

    Nuclear Security Administration Y-12 honors its inventors with Technology Transfer awards Monday, May 23, 2016 - 10:08am Y-12 recently recognized 29 inventors at their annual Tech Transfer award ceremony. The group was awarded 13 patents and submitted more than 30 invention disclosures in the past year. OAK RIDGE, Tennessee - Twenty-nine Y-12 inventors were recognized for their technology and innovative accomplishments during the recent 12th annual Technology Transfer Awards Ceremony. The

  11. Honoring Our Past, Securing Our Future | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration Honoring Our Past, Securing Our Future April 28, 2010 Transforming a Cold War Nuclear Weapons Complex into a 21st Century Nuclear Security Enterprise - Completed one-of-a-kind construction projects like the National Ignition Facility, Highly Enriched Uranium Materials Facility (HEUMF) and the Microsystems and Engineering Sciences Application (MESA) facility. - U.S. stockpile less than one-quarter of what it was at the end of the Cold War. - Reduced approximately $750 million

  12. National group honors Sandia radiation effects expert | National Nuclear

    National Nuclear Security Administration (NNSA)

    Security Administration National group honors Sandia radiation effects expert Monday, July 21, 2014 - 1:26pm NNSA Blog Sandia radiation effects researcher Jim Schwank has won the 2014 IEEE Nuclear and Plasma Sciences Society Merit Award, which recognizes outstanding technical contributions to the fields of nuclear and plasma sciences. The award is based on the importance of individual technical contributions, importance of technical contributions made by teams the individual led, quality and

  13. Two Los Alamos scientists honored with E.O. Lawrence Awards

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

    Two Los Alamos scientists honored with E.O. Lawrence Awards Two Los Alamos scientists honored with E.O. Lawrence Awards Outstanding performance in two vital mission areas resulted in prestigious awards for two Los Alamos National Laboratory scientists this week. May 21, 2015 Two Los Alamos scientists honored with E.O. Lawrence Awards Los Alamos National Laboratory, Los Alamos, New Mexico Contact Los Alamos National Laboratory Nancy Ambrosiano Communications Office (505) 667-0471 Email

  14. White House Honors Federal Agencies for Saving Taxpayers $133 Million in

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

    Energy Costs by Increasing Efficiency Measures | Department of Energy Honors Federal Agencies for Saving Taxpayers $133 Million in Energy Costs by Increasing Efficiency Measures White House Honors Federal Agencies for Saving Taxpayers $133 Million in Energy Costs by Increasing Efficiency Measures November 2, 2007 - 4:21pm Addthis Recipients of Presidential Awards for Leadership in Federal Energy Management Recognized WASHINGTON, DC - The White House today honored five energy management teams

  15. TechLine: NETL Scientists Honored by ASM International for Work...

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

    Energy Technology Laboratory (NETL), and their colleagues, were honored with a 2015 ASM Engineering Materials Achievement Award from the materials science and engineering society ...

  16. Tierra Concrete Homes Honored with Energy Star Award

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

    Tierra Concrete Homes Honored with Energy Star Award For more information contact: Sarah Holmes Barba, 303-275-3023 email: Sarah Homes Barba Golden, Colo., August 8, 2001 - Tierra Concrete Homes, Inc. of Pueblo, Colo., has been recognized as a leader in energy-efficient home building by Energy Star, a national program that develops energy-saving partnerships with the home building industry. The first-ever "Most Energy-Efficient Homes of the New Millennium" award was presented to

  17. The Honorable John T. 'Gregorio 301 N. Wood Avenue

    Office of Legacy Management (LM)

    Eiergy ; Washington, DC 20585 -, (, > - .' c ' . FEB 1 7 1995 _ .; , _-, The Honorable John T. 'Gregorio 301 N. Wood Avenue Linden, 'New Jersey 07036 d. \ Dear Mayor Gregorio: ,' ,' .' , Secretary of Energy Hazel O'Leary has announced a new approach to openness, in the'llepartment' of Energy (DDE) and its co,annunications with the .public.', In sup~port of this initiative, we are.pleased to forward.the,enclosed information reiated to the.former Linden Pilot Plant of the Chemical' Construction

  18. SPE-4 Prime NNSA Honors NvE Employees

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

    SPE-4 Prime NNSA Honors NvE Employees Experiment to detect low-yield nuclear explosions was a collaborative effort. FY14 research and development projects get top billing. Aviation, safety, security, long-term tenure are among the awards. See page 4. See page 6. NNSA's Klotz, Creedon Visit NvE Facilities National Nuclear Security Administration (NNSA) Administrator Frank Klotz and Deputy Administrator Madelyn Creedon visited the Nevada Enterprise (NvE) July 13-15. Klotz came to update employees

  19. ,The Honorable Thomas Henino City Hall Plaza I

    Office of Legacy Management (LM)

    Department of Energy Washington,. DC 20585 MAR 29 1995 ,The Honorable Thomas Henino City Hall Plaza I Boston, Massachusetts 02201 '. ! Dear Mayor Menino: Even though additional involvement by DOE is,not necessary at this site, we are prepared to respond to any concerns you may have. -' : __ if you have any questions,' please feel free to call me eat 301-427li721 or Dr. W. Alexander Willlams (301-427-1719)~of my staff. ' gyp , ,~.&.Qz J ~ J / d .!~a : T- " ames W. Wagoner I -. Secretary

  20. CNS employees greet Honor Air veterans | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    Administration CNS employees greet Honor Air veterans Thursday, December 10, 2015 - 1:46pm NNSA Blog Y-12 Deputy Site Manager Gene Sievers, left, and ProForce's Neal Wolfenbarger pose for photo at McGhee Tyson Airport in Knoxville, TN, as Wolfenbarger waits on his uncle to return from Washington, D.C. Veterans Day is important to all Americans, but it carries an even more elevated meaning to those who have served our country in the Armed Forces. Not only are they recognized for their

  1. Quantum Dots: Theory

    SciTech Connect (OSTI)

    Vukmirovic, Nenad; Wang, Lin-Wang

    2009-11-10

    This review covers the description of the methodologies typically used for the calculation of the electronic structure of self-assembled and colloidal quantum dots. These are illustrated by the results of their application to a selected set of physical effects in quantum dots.

  2. Sandia Energy - 'Giant' Nanocrystal Quantum Dots

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

    'Giant' Nanocrystal Quantum Dots Home Energy Research EFRCs Solid-State Lighting Science EFRC 'Giant' Nanocrystal Quantum Dots 'Giant' Nanocrystal Quantum DotsTara...

  3. WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico

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

    Fermi Award | Department of Energy WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico Fermi Award WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico Fermi Award May 10, 2012 - 5:30pm Addthis Secretary of Energy Steven Chu honored Drs. Mildred Dresselhaus and Burton Richter as winners of the Enrico Fermi Award on Monday, May 7, 2012 in Washington, D.C. Amanda Scott Amanda Scott Former Managing Editor, Energy.gov What are the key facts? The Fermi

  4. DOE-Funded Researchers Honored by R&D Magazine: Leader of DOE Artificial

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

    Researchers Honored by R&D Magazine DOE-Funded Researchers Honored by R&D Magazine October 20, 2005 - 12:23pm Addthis Leader of the DOE Artificial Retina Project Named "Innovator of the Year;" Scientists and Engineers at 12 DOE Labs Win 29 R&D 100 Awards for 2005 WASHINGTON, DC-Secretary of Energy Samuel W. Bodman today congratulated the leader of the Department of Energy's Artificial Retina Project, who has been honored as R&D Magazine's "Innovator of the

  5. EPA and DOE Honor 2015 Energy Star Partners of the Year for Leadership on

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

    Energy Efficiency, Acting on Climate | Department of Energy EPA and DOE Honor 2015 Energy Star Partners of the Year for Leadership on Energy Efficiency, Acting on Climate EPA and DOE Honor 2015 Energy Star Partners of the Year for Leadership on Energy Efficiency, Acting on Climate April 6, 2015 - 4:08pm Addthis NEWS MEDIA CONTACT (202) 586-4940 The U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE) are honoring 128 businesses and organizations in 33 states

  6. CUG Honors NERSC Burst Buffer Early User Program with 'Best Paper'

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

    CUG Honors NERSC Burst Buffer Early User Program with 'Best Paper' CUG Honors NERSC Burst Buffer Early User Program with 'Best Paper' May 11, 2016 Contact: Kathy Kincade, +1 510 495 2124, kkincade@lbl.gov CUGaward NERSC was honored with the 2016 CUG Best Paper award for "Accelerating Science with the NERSC Burst Buffer Early User Program." Wahid Bhimji (right), shown here with CUG Program Chair Andrew Winfer, accepted the award on behalf of the NERSC team that authored the paper. A new

  7. Off-shelf portion of Harris delta: a reexamination of downdip Woodbine-Eagle Ford

    SciTech Connect (OSTI)

    Porter, M.

    1989-03-01

    This study relates the Eagle Ford-equivalent Harris delta north of the Stuart City shelf edge with the downdip Woodbine-Eagle Ford section south of that shelf edge. Together, they comprised one large deltaic complex that divided into two major lobes at an avulsion site near Anderson County. One lobe prograded southwestward toward Kurten field in Brazos County; the other (now partly eroded) prograded southeastward beside the low-lying Sabine (uplift) landmass into Polk County. The Polk County lobe crossed the Stuart City shelf edge in the Seven Oaks-Hortense field area and continued to prograde southward into deeper and higher energy water. Such an environment caused this off-shelf Harris delta to oversteepen, resulting in frequent slumps and gravity flows that deposited debris-flow and turbidite sands along with predominantly fine-grained prodelta sediments. More familiar deltaic facies (outer fringe) are present in the uppermost section. Numerous structural and stratigraphic maps and cross sections illustrate the progradation of the downdip Harris delta and its features. The progradation was arrested for a time by deeper water at the older and more precipitous Sligo shelf edge. This progradational hiatus is recorded by a relatively strong reflection that separates two seismic sequences. The younger, onlapping sequence appears to represent continued Harris delta sedimentation. Among the interesting features mapped seismically and/or geologically are mounded reflections that represent the largest slumping events, thickness anomalies associated with the carbonate substrate, and erosional( ) channels at the section top. These off-shelf Harris delta deposits appear to interfinger laterally with a genetically different eastern (Tuscaloosa ) sequence in Tyler and Jasper Counties.

  8. Off-shelf portion of Harris delta: Reexamination of downdip Woodbine-Eagle Ford

    SciTech Connect (OSTI)

    Porter, M.H. ); Van Siclen, D.C.; Sheriff, R.E. )

    1989-09-01

    This study related the Eagle Ford equivalent Harris delta north of the Stuart City shelf edge with downdip Woodbine-Eagle Ford section south of that shelf edge. Together, they comprised one large deltaic complex that divided into two major lobes at an avulsion site near Anderson County, Texas. One lobe prograded southwestward toward Kurten field in Brazos County, the other (now partly eroded) prograded southeastward beside the low-lying Sabine (uplift) landmass into Polk County. The Polk County lobe crossed the Stuart City shelf edge in the Seven Oaks-Hortense field area, and continued to prograde southward into deeper and higher energy water. Such an environment caused this off-shelf Harris delta to oversteepen, resulting in frequent slumps and gravity flows that deposited debris-flow and turbidite sands along with predominantly fine-grained prodelta sediments. More familiar deltaic facies (outer fringe) are present in the uppermost section. Numerous structural and stratigraphic maps and cross sections illustrate the progradation of the downdip Harris delta and its features. The progradation was arrested for a time by deeper water at the older and more precipitous Sligo shelf edge. This progradational hiatus is recorded by a relatively strong reflection that separates two seismic sequences. The younger onlapping sequence appears to represent continued Harris delta sedimentation. among the interesting features mapped seismically and/or geologically are: mounded reflections that represent the largest slumping events, thickness anomalies associated with the carbonate substrate, and erosional( ) channels at the section top. These off-shelf Harris delta deposits appear to interfinger laterally with a genetically different eastern (Tuscaloosa ) sequence in Tyler and Jasper Counties.

  9. DOT specification packages evaluation

    SciTech Connect (OSTI)

    Ratledge, J.E.; Rawl, R.R. )

    1991-01-01

    During the late 1960s and early 1970s, the Department of Transportation (DOT) specification package system was implemented to serve as a useful and equivalent alternative to the Nuclear Regulatory Commission (NRC) and the Bureau of Explosives approval systems for Type B and fissile radioactive material package designs. When a package design was used by a large number of organizations, the package design was added to the DOT regulations as a specification package authorized for use by any shipper. In the mid-1970s, the NRC revised its package design certification system to the one in use today. This paper reports that, while the NRC and DOT transportation regulations have evolved over the years, the DOT specification package designs have remained largely unchanged. Questions have been raised as to whether these designs meet the current and proposed regulations. In order to enable the NRC and DOT to develop a regulatory analysis that will support appropriate action regarding the specification packages, a study is being performed to compile all available design, testing, and analysis information on these packages.

  10. Geothermal Energy Association Honors NREL's Dr. Bharathan for Work in Condenser Technology

    Broader source: Energy.gov [DOE]

    The Geothermal Energy Association (GEA) recently announced the finalists for the GEA Honors, which recognizes companies and individuals that have made significant contributions during the past year to advancing technology, spurring economic development or protecting the environment.

  11. DOE’s Worker-Focused Safety Program Honors Contractors Across EM Complex

    Broader source: Energy.gov [DOE]

    Several contractors across the EM complex received honors in recent months in an important DOE safety program that turns to workers to assess, prevent, and control potential health and safety hazards.

  12. NREL Honored for 20 Years of DOE Science Bowl Support - News...

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

    Honored for 20 Years of DOE Science Bowl Support May 3, 2010 As part of its 20-year ... The National Science Bowl is celebrating 20 years of competition as the only academic ...

  13. Red Cross honors LLNL as biggest blood donor west of Mississippi...

    National Nuclear Security Administration (NNSA)

    Red Cross honors LLNL as biggest blood donor west of Mississippi Thursday, April 2, 2015 - 3:19pm For more than 22 years, Lawrence Livermore National Laboratory (LLNL) has ...

  14. Honors and Awards | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Awards Transcribed Media PECASE Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 About Honors and ...

  15. Department of Energy Honors 50 ENERGY STAR® Partners that Saved Consumers $10 Billion

    Broader source: Energy.gov [DOE]

    WASHINGTON, DC - The U.S. Department of Energy (DOE) and the U.S. Environmental Protection Agency (EPA) honored 50 companies, organizations and government entities that have helped to significantly...

  16. EMCBC Honored for Helping Administer American Recovery and Reinvestment Act Funds

    Broader source: Energy.gov [DOE]

    DOE’s Office of Energy Efficiency and Renewable Energy (EERE) honored the Cincinnati-based EM Consolidated Business Center (EMCBC) this month for work EMCBC completed under the American Reinvestment and Recovery Act.

  17. Nominate An Inspirational STEM Teacher for the Nation’s Highest Honors

    Broader source: Energy.gov [DOE]

    Nominations are now open for the nation’s highest honors for K-12 mathematics and science teachers. The Presidential Awards for Excellence in Mathematics and Science Teaching, or PAEMST, have been...

  18. Top Los Alamos technology spinoff ideas honored at DisrupTech

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

    Los Alamos technology spinoff ideas honored at DisrupTech Top Los Alamos technology spinoff ideas honored at DisrupTech Three potential business partnership projects emerged from the 2015 DisrupTech competition at Los Alamos National Laboratory with winning proposals. July 23, 2015 Taking the "Best Pitch" prize of $10,000 in internal Laboratory funding was the aptly named Cosmic Plumbing Inspection project, described by physicist Matt Durham. The project uses cosmic particles called

  19. Honors and Recognition | OSTI, US Dept of Energy, Office of Scientific and

    Office of Scientific and Technical Information (OSTI)

    Technical Information Honors and Recognition Achievements Home Milestones Accelerating Access Charts 2012 January 2012 - CENDI Meritorious Award for FY11 2011 March 2011 - OSTI honored with Anderson County Combined Federal Campaign Awards 2010 December 2010 - White House recognizes ScienceEducation.gov August 2010 - OSTIblog cited as a Top Government Blog 2009 December 2009 - OSTI clears path for finding many of world's highly-ranked research repositories, new rankings show October 2009 -

  20. IEEE Honors DeBlasio with Steinmetz Award - News Releases | NREL

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

    IEEE Honors DeBlasio with Steinmetz Award November 29, 2010 Richard DeBlasio, chief engineer for renewable electricity and end use systems with the U.S. Department of the Energy's National Renewable Energy Laboratory (NREL), will be honored by IEEE (Institute of Electrical and Electronics Engineers), the world's largest technical professional association, with the 2010 Charles Proteus Steinmetz Award. The award will be presented on Dec. 5 at the IEEE Standards Association Awards Ceremony in New

  1. EPA Honors NREL-Sponsored Habitat For Humanity Home - News Releases | NREL

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

    EPA Honors NREL-Sponsored Habitat For Humanity Home Energy Efficient House Earns New Millennium Builder Award October 21, 2003 Golden, Colo. - An energy efficient home built in partnership with the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) and Habitat for Humanity of Metro Denver was honored by the U.S. Environmental Protection Agency (EPA) with the Energy Star® New Millennium Builder Award for 2003. This award recognizes Habitat for Humanity for its

  2. EERE Success Story-EPA and DOE Honor 2015 Energy Star Partners of the

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

    Year, Recognizing Leadership and Action in Energy Efficiency, Featuring Better Buildings Challenge | Department of Energy EPA and DOE Honor 2015 Energy Star Partners of the Year, Recognizing Leadership and Action in Energy Efficiency, Featuring Better Buildings Challenge EERE Success Story-EPA and DOE Honor 2015 Energy Star Partners of the Year, Recognizing Leadership and Action in Energy Efficiency, Featuring Better Buildings Challenge April 24, 2015 - 11:30am Addthis 128 businesses and

  3. EERE Success Story-Utilities in California and Washington Receive Honors

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

    for Innovative Wind Deployment | Department of Energy Utilities in California and Washington Receive Honors for Innovative Wind Deployment EERE Success Story-Utilities in California and Washington Receive Honors for Innovative Wind Deployment August 22, 2013 - 12:00am Addthis EERE recognized utilities in California and Washington with the 2013 Public Power Wind award for outstanding efforts to accelerate the use of wind energy. Created in 2003 by the Department's Wind Powering America

  4. Team of NETL Scientists Honored By ASM International for Their Work on

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

    Team of NETL Scientists Honored By ASM International for Their Work on Platinum-Chromium Alloy for Coronary Stents Albany, Ore. - Scientists at the National Energy Technology Laboratory (NETL), and their colleagues, were recently honored with a 2015 ASM Engineering Materials Achievement Award from the materials science and engineering society ASM International. The NETL team received the prestigious award for their work on the development, transfer, and successful commercialization of a novel

  5. NREL Solar Researcher Honored with ASES Abbot Award - News Releases | NREL

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

    Solar Researcher Honored with ASES Abbot Award July 21, 2006 Photo of Dr. Chuck Kutscher, recipient of the Charles Greeley Abbot Award. Dr. Chuck Kutscher The American Solar Energy Society (ASES) honored Dr. Chuck Kutscher of the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) with the Charles Greeley Abbot Award during the recent ASES SOLAR 2006 conference. The Abbot Award recognizes individuals who have made significant career contributions to the field of solar

  6. White House Honors Four Early-Career Sandia Researchers | National Nuclear

    National Nuclear Security Administration (NNSA)

    Security Administration White House Honors Four Early-Career Sandia Researchers Tuesday, February 18, 2014 - 3:00pm Sandia National Laboratories researchers Matthew Brake, Adrian Chavez, Seth Root and Daniel Stick have been named by President Barack Obama as recipients of the Presidential Early Career Award for Scientists and Engineers (PECASE). The PECASE is the highest honor the U.S. government gives outstanding scientists and engineers who are beginning their careers. Read more. About the

  7. Spotlight: Two Los Alamos scientists honored with E.O. Lawrence Awards

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

    Two Los Alamos scientists honored with E.O. Lawrence Awards Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues » submit Spotlight: Two Los Alamos scientists honored with E.O. Lawrence Awards Fryer and Dors noted for achievements in space physics, satellite radiation sensors July 1, 2015 Eric E. Dors (l) and Christopher L. Fryer (r) Eric E. Dors (l) and Christopher L. Fryer (r) Contact Linda Anderman Email Outstanding performance

  8. 'Giant' Nanocrystal Quantum Dots

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

    'Giant' Nanocrystal Quantum Dots - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs

  9. Wind Powering America's Wind for Schools Team Honored with Wirth Chair

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

    Award | Department of Energy Powering America's Wind for Schools Team Honored with Wirth Chair Award Wind Powering America's Wind for Schools Team Honored with Wirth Chair Award May 1, 2012 - 2:46pm Addthis This is an excerpt from the Second Quarter 2012 edition of the Wind Program R&D Newsletter. The University of Colorado at Denver and the Wirth Chair awarded the Energy Department's National Renewable Energy Laboratory (NREL) a Wirth Chair Sustainability Award for its work on the Wind

  10. NREL Solar Technologies Recognized with Special R&D 100 Honors - News

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

    Releases | NREL NREL Solar Technologies Recognized with Special R&D 100 Honors October 24, 2008 Researchers at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) took home high honors from Editors of R&D Magazine recently for two separate solar cell technologies that were named "the most revolutionary technologies of the year." At its annual awards gala for the winners of the R&D 100 awards in Chicago Oct. 16, R&D Magazine announced that an

  11. Y-12 honors past plant manager and building's namesake, Jack Case | Y-12

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

    National Security Complex honors past plant ... Y-12 honors past plant manager and building's namesake, Jack Case Posted: December 30, 2014 - 12:51pm Jack Case's granddaughter Michelle Hurst points out to her mother Linda Fellers and uncle Patrick Case that the artist who created the bust of her grandfather "pretty well nailed it on the likeness." The family loaned a number of Case's personal articles, including the bust given to him as a birthday present by a friend's wife who was

  12. Secretary Moniz to Honor Dr. Phil Sharp, 2015 Recipient of the Schlesinger

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

    Medal for Energy Security, at Department of Energy Event | Department of Energy to Honor Dr. Phil Sharp, 2015 Recipient of the Schlesinger Medal for Energy Security, at Department of Energy Event Secretary Moniz to Honor Dr. Phil Sharp, 2015 Recipient of the Schlesinger Medal for Energy Security, at Department of Energy Event January 14, 2016 - 10:40am Addthis News Media Contact 202-586-4940 DOENews@hq.doe.gov WASHINGTON - On January 20, 2016 at 10:00 AM, Energy Secretary Ernest Moniz will

  13. In September 2013, the Department of Energy (DOE) launched the Minorities

    Energy Savers [EERE]

    January 19, 2013 | Department of Energy In DC and Around the Nation: Join the National Day of Service on Saturday, January 19, 2013 In DC and Around the Nation: Join the National Day of Service on Saturday, January 19, 2013 January 16, 2013 - 9:22am Addthis Dot Harris Dot Harris Director, Office of Economic Impact and Diversity Americans in all 50 states can honor the legacy of Dr. Martin Luther King, Jr., though living out his values of service, care for your neighbor, and social justice.

  14. International Conference to be Held in Honor of LSU Professor (Louisiana

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

    State University Media Center) | Jefferson Lab International Conference to be Held in Honor of LSU Professor (Louisiana State University Media Center) External Link: http://www.lsu.edu/ur/ocur/lsunews/MediaCenter/News/2012/06/item48547.html By jlab_admin on Mon, 2012-06-0

  15. Oak Ridge employees honored with Department of Energy’s Secretary’s Appreciation Award

    Broader source: Energy.gov [DOE]

    Eight employees from DOE's Oak Ridge Office were recognized at an awards ceremony for earning the Secretary’s Appreciation Award, one of the federal agency’s highest internal recognitions. The award honors employees who ‘go above and beyond the call of duty in their work endeavors.'

  16. ASCR Researchers Honored With a Presidential Early Career Award | U.S. DOE

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

    Office of Science (SC) Researchers Honored With a Presidential Early Career Award Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) Community Resources ASCR Discovery Monthly News Roundup News Archives ASCR Program Documents ASCR Workshops and Conferences ASCR Presentations 100Gbps Science Network Related Links Contact Information Advanced

  17. Promising future of quantum dots explored in conference

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

    Promising future of quantum dots explored Promising future of quantum dots explored in conference Researchers are gathering to reflect on two decades of quantum dot research at a...

  18. Nanoscale engineering boosts performance of quantum dot light...

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

    Quantum dot light emitting diodes Nanoscale engineering boosts performance of quantum dot light emitting diodes Quantum dots are nano-sized semiconductor particles whose emission...

  19. EPA and DOE Honor 2016 Energy Star Partners of the Year for Outstanding Achievements in Energy Efficiency

    Broader source: Energy.gov [DOE]

    U.S. Environmental Protection Agency and the Energy Department honoring 149 businesses and organizations in 35 states for their commitment to saving energy and protecting the environment through superior energy efficiency achievements.

  20. Two Sandians Honored in 2015 Hispanic Engineer of the Year Awards

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

    Sandians Honored in 2015 Hispanic Engineer of the Year Awards - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle

  1. PPPL's science lecture debuts Jan. 10 with new name honoring long-time

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

    organizer | Princeton Plasma Physics Lab PPPL's science lecture debuts Jan. 10 with new name honoring long-time organizer By Jeanne Jackson DeVoe December 22, 2014 Tweet Widget Google Plus One Share on Facebook The late Ron Hatcher hosted PPPL's Science on Saturday lectures. (Photo by Photo by Elle Starkman/ PPPL Office of Communications) The late Ron Hatcher hosted PPPL's Science on Saturday lectures. The U.S. Department of Energy's Princeton Plasma Laboratory's popular Science on Saturday

  2. DOE Nominees Among Outstanding Early-Career Scientists Honored by President

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

    Obama | U.S. DOE Office of Science (SC) DOE Nominees Among Outstanding Early-Career Scientists Honored by President Obama News News Home Featured Articles Science Headlines 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Highlights Presentations & Testimony News Archives Communications and Public Affairs Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 12.23.13 DOE Nominees Among

  3. The Honorable Rudolph Giuliani City Hall New York, New York 10007

    Office of Legacy Management (LM)

    Deparhent of Eneigy Washington, DC 20585 ,, , The Honorable Rudolph Giuliani City Hall New York, New York 10007 Dear Mayor Giuljani: :. / Secretary of Energy Hazel O'Leary has announced- a new approach to opennes ', -the Department of Energy (DOE).and,its communications with the public.- I support of this initiative, we are pleased to forward the enclosed inforo related to the Ledoux and Co. site in your jurisdiction that performed wa for DOE's predecessor agencies. 'information, use, and

  4. NREL Fellow Honored for 'Chemistry in the Public Interest' - News Releases

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

    | NREL Fellow Honored for 'Chemistry in the Public Interest' Groundbreaking solar research garners award from American Chemical Society March 29, 2011 Dr. Arthur J. Nozik, senior research fellow at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), will be awarded the Gustavus John Esselen Award for Chemistry in the Public Interest, from the American Chemical Society's Northeastern Section at Harvard University on April 14. The Gustavus John Esselen Award for

  5. NREL Solar Researcher Honored with World PV Award - News Releases | NREL

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

    NREL Solar Researcher Honored with World PV Award May 10, 2006 Golden, Colo. - Dr. Lawrence Kazmerski, a leading research director at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL), received the World PV Award at the Fourth World Conference on Photovoltaic Energy Conversion on May 9 for his outstanding contributions to the worldwide advancements of photovoltaic (PV) science and technology. The award, sponsored by professional organizations from the European,

  6. NREL's DeBlasio honored by American National Standards Institute - News

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

    Releases | NREL NREL's DeBlasio honored by American National Standards Institute Engineer led effort to standardize how distributed energy integrates with the electric grid September 15, 2011 Dick DeBlasio, a research engineer with the U.S. Department of Energy's National Renewable Energy Laboratory, has been named the 2011 winner of the Finegan Standards Medal by the American National Standards Institute (ANSI). The award is given once a year by ANSI for extraordinary leadership in the

  7. The Honorable Carl Levin United States Senator 15100 North Line Road

    Office of Legacy Management (LM)

    November 30, 1993 The Honorable Carl Levin United States Senator 15100 North Line Road Room 107A Southgate, Michigan 48195 Dear Senator Levin: Secretary O'Leary asked that we respond to your October 20, 1993, letter regarding our work at a General Motors facility In southeastern Michigan. Located at 1450 Beecher Street in Adrian, the facility was operated by companies that worked under contract for the former Atomic Energy Commission to perform extrusion work on thorium and depleted, natural,

  8. National Day of Remembrance HSS Honors Former Nuclear Weapons Program Workers

    Broader source: Energy.gov [DOE]

    On Friday, October 25th 2013, HSS honored over 150 nuclear weapons program workers at the National Atomic Testing Museum (NATM). Hosted by NATM Director Allan Palmer, the event was conducted in recognition of the US Senate Resolution which designates October 30th as a National Day of Remembrance to recognize the Department of Energy nuclear weapons workers for their contribution, service and sacrifice for the defense of the United States.

  9. Fossil Energy Acting Assistant Secretary Recognized at Black...

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

    Addthis Director Dot Harris presents Chris Smith, Principal Deputy Assistant Secretary and ... Photo Credit: Nancy Jo Brown106FOTO Director Dot Harris presents Chris Smith, Principal ...

  10. Modeling of the quantum dot filling and the dark current of quantum dot infrared photodetectors

    SciTech Connect (OSTI)

    Ameen, Tarek A.; El-Batawy, Yasser M.; Abouelsaood, A. A.

    2014-02-14

    A generalized drift-diffusion model for the calculation of both the quantum dot filling profile and the dark current of quantum dot infrared photodetectors is proposed. The confined electrons inside the quantum dots produce a space-charge potential barrier between the two contacts, which controls the quantum dot filling and limits the dark current in the device. The results of the model reasonably agree with a published experimental work. It is found that increasing either the doping level or the temperature results in an exponential increase of the dark current. The quantum dot filling turns out to be nonuniform, with a dot near the contacts containing more electrons than one in the middle of the device where the dot occupation approximately equals the number of doping atoms per dot, which means that quantum dots away from contacts will be nearly unoccupied if the active region is undoped.

  11. Contact Us | Department of Energy

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

    Contact Us Contact Us Office of Economic Impact & Diversity 1000 Independence Ave., SW Washington, DC 20585 Phone: (202) 586-8383 Fax: (202) 586-3075 Office of the Director Director, The Honorable LaDoris 'Dot' Harris Principal Deputy Director, Andre H. Sayles, Ph.D. Office of Minority Education and Community Development Deputy Director, Annie Whatle Annie.Whatley@hq.doe.gov Office of Minority Business and Economic Development Deputy Director, Karen Atkinson Karen.Atkinson@hq.doe.gov Office

  12. President Obama Announces More Key Administration Posts | Department of

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

    Energy July 27, 2011 - 3:25pm Addthis WASHINGTON - Today, President Barack Obama announced his intent to nominate the following individuals to key Administration posts: David Danielson - Assistant Secretary for Energy Efficiency and Renewable Energy, Department of Energy Dot Harris - Director of the Office of Minority Economic Impact, Department of Energy President Obama said, "I am honored that these talented individuals have decided to join this Administration and serve our country. I

  13. New Investigator Award Established at SSRL to Honor W.E. Spicer (1929-2004)

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

    Co-Founder of SSRL and Pioneer in Photoemission Spectroscopy | Stanford Synchrotron Radiation Lightsource New Investigator Award Established at SSRL to Honor W.E. Spicer (1929-2004) Co-Founder of SSRL and Pioneer in Photoemission Spectroscopy William E. (Bill) Spicer On June 6, 2004 while vacationing in London, William E. (Bill) Spicer died of heart failure. Overcoming a series of obstacles as a youth, Bill went on to become an esteemed member of the international scientific community as a

  14. Paul Mutolo talks about Honorable Transportation - TEDxChemungRiver > EMC2

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

    News > The Energy Materials Center at Cornell Paul Mutolo talks about Honorable Transportation - TEDxChemungRiver January 4th, 2016 › Dr. Paul Mutolo spoke at TEDxChemungRiver 2015 in Corning, New York back in November. To view the video, go to https://www.youtube.com/watch?v=xdq5H23qcY0. While Paul is a scientist and an entrepreneur, he is, at his heart, an environmentalist who believes advancements in alternative energy haven't come far enough. He is ever mindful of how the creation

  15. High School Girls Honored for Math, Science Achievements at Sandia National Laboratory

    Broader source: Energy.gov [DOE]

    Now in its 23rd year, the Math and Science Awards program is sponsored by the Sandia Women’s Connection. This year’s event honored more students, with the addition of four high schools in Oakland, Calif., and included recognition of the students by federal and state officials. Teachers from 15 high schools in Livermore, Dublin, Pleasanton, Tracy, Manteca and Oakland nominated high school juniors whom they deemed outstanding in math and science, so the students can include the award on college and scholarship applications.

  16. Alumna of NREL's Teaching Program honored by White House - News Releases |

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

    NREL Alumna of NREL's Teaching Program honored by White House August 2, 2010 A high school physics teacher who spent three summers studying hydrogen fuel cells at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) has been named one of the math and science teachers of the year by a White House panel. Kristen Record, who teaches at Bunnell High School in Stratford, Conn., spent her summers in 2005, 2007 and 2008 at NREL in the DOE's rigorous Academies Creating

  17. Emission switching in carbon dots coated CdTe quantum dots driving by pH

    Office of Scientific and Technical Information (OSTI)

    dependent hetero-interactions (Journal Article) | SciTech Connect Emission switching in carbon dots coated CdTe quantum dots driving by pH dependent hetero-interactions Citation Details In-Document Search Title: Emission switching in carbon dots coated CdTe quantum dots driving by pH dependent hetero-interactions Due to the different emission mechanism between fluorescent carbon dots and semiconductor quantum dots (QDs), it is of interest to explore the potential emission in

  18. Quantum Dot Light Emitting Diode

    SciTech Connect (OSTI)

    Keith Kahen

    2008-07-31

    The project objective is to create low cost coatable inorganic light emitting diodes, composed of quantum dot emitters and inorganic nanoparticles, which have the potential for efficiencies equivalent to that of LEDs and OLEDs and lifetime, brightness, and environmental stability between that of LEDs and OLEDs. At the end of the project the Recipient shall gain an understanding of the device physics and properties of Quantum-Dot LEDs (QD-LEDs), have reliable and accurate nanocrystal synthesis routines, and have formed green-yellow emitting QD-LEDs with a device efficiency greater than 3 lumens/W, a brightness greater than 400 cd/m2, and a device operational lifetime of more than 1000 hours. Thus the aim of the project is to break the current cost-efficiency paradigm by creating novel low cost inorganic LEDs composed of inorganic nanoparticles.

  19. Quantum Dot Light Emitting Diode

    SciTech Connect (OSTI)

    Kahen, Keith

    2008-07-31

    The project objective is to create low cost coatable inorganic light emitting diodes, composed of quantum dot emitters and inorganic nanoparticles, which have the potential for efficiencies equivalent to that of LEDs and OLEDs and lifetime, brightness, and environmental stability between that of LEDs and OLEDs. At the end of the project the Recipient shall gain an understanding of the device physics and properties of Quantum-Dot LEDs (QD-LEDs), have reliable and accurate nanocrystal synthesis routines, and have formed green-yellow emitting QD-LEDs with a device efficiency greater than 3 lumens/W, a brightness greater than 400 cd/m{sup 2}, and a device operational lifetime of more than 1000 hours. Thus the aim of the project is to break the current cost-efficiency paradigm by creating novel low cost inorganic LEDs composed of inorganic nanoparticles.

  20. Promising future of quantum dots explored in conference

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

    Promising future of quantum dots explored Promising future of quantum dots explored in conference Researchers are gathering to reflect on two decades of quantum dot research at a special topical conference, "20 Years of Quantum Dots at Los Alamos" April 13, 2015 Quantum dot LSC devices under ultraviolet illumination. Quantum dot LSC devices under ultraviolet illumination. Contact Los Alamos National Laboratory Nancy Ambrosiano Communications Office (505) 667-0471 Email "This

  1. TechLine: NETL Scientists Honored by ASM International for Work on Platinum Chromium Alloy for Coronary Stents

    Broader source: Energy.gov [DOE]

    Scientists at the National Energy Technology Laboratory (NETL), and their colleagues, were honored with a 2015 ASM Engineering Materials Achievement Award for their work to develop and commercialize of a platinum-chromium alloy used in next-generation coronary stents,

  2. Los Alamos researchers unravel the mystery of quantum dot blinking

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

    Researchers unravel the mystery of quantum dot blinking Los Alamos researchers unravel the mystery of quantum dot blinking Most exciting is that the Los Alamos researchers have...

  3. Generation of even harmonics in coupled quantum dots (Journal...

    Office of Scientific and Technical Information (OSTI)

    Generation of even harmonics in coupled quantum dots Citation Details In-Document Search Title: Generation of even harmonics in coupled quantum dots Using the spatial-temporal...

  4. Single-dot optical emission from ultralow density well-isolated InP quantum dots

    SciTech Connect (OSTI)

    Ugur, A.; Hatami, F.; Masselink, W. T.; Vamivakas, A. N.; Lombez, L.; Atatuere, M.

    2008-10-06

    We demonstrate a straightforward way to obtain single well-isolated quantum dots emitting in the visible part of the spectrum and characterize the optical emission from single quantum dots using this method. Self-assembled InP quantum dots are grown using gas-source molecular-beam epitaxy over a wide range of InP deposition rates, using an ultralow growth rate of about 0.01 atomic monolayers/s, a quantum-dot density of 1 dot/{mu}m{sup 2} is realized. The resulting isolated InP quantum dots embedded in an InGaP matrix are individually characterized without the need for lithographical patterning and masks on the substrate. Such low-density quantum dots show excitonic emission at around 670 nm with a linewidth limited by instrument resolution. This system is applicable as a single-photon source for applications such as quantum cryptography.

  5. Thick-shell nanocrystal quantum dots

    DOE Patents [OSTI]

    Hollingsworth, Jennifer A.; Chen, Yongfen; Klimov, Victor I.; Htoon, Han; Vela, Javier

    2011-05-03

    Colloidal nanocrystal quantum dots comprising an inner core having an average diameter of at least 1.5 nm and an outer shell, where said outer shell comprises multiple monolayers, wherein at least 30% of the quantum dots have an on-time fraction of 0.80 or greater under continuous excitation conditions for a period of time of at least 10 minutes.

  6. Theory Of Alkyl Terminated Silicon Quantum Dots

    SciTech Connect (OSTI)

    Reboredo, F; Galli, G

    2004-08-19

    We have carried out a series of ab-initio calculations to investigate changes in the optical properties of Si quantum dots as a function of surface passivation. In particular, we have compared hydrogen passivated dots with those having alkyl groups at the surface. We find that, while on clusters with reconstructed surfaces a complete alkyl passivation is possible, steric repulsion prevents full passivation of Si dots with unreconstructed surfaces. In addition, our calculations show that steric repulsion may have a dominant effect in determining the surface structure, and eventually the stability of alkyl passivated clusters, with results dependent on the length of the carbon chain. Alkyl passivation weakly affects optical gaps of silicon quantum dots, while it substantially decreases ionization potentials and electron affinities and affect their excited state properties. On the basis of our results we propose that alkyl terminated quantum dots may be size selected taking advantage of the change in ionization potential as a function of the cluster size.

  7. Statement from U.S. Secretary of Energy Ernest Moniz and Deputy Secretary Elizabeth Sherwood-Randall on the National Day of Remembrance Honoring Nuclear Weapons Workers

    Broader source: Energy.gov [DOE]

    “Today is a National Day of Remembrance for nuclear weapons and uranium workers and we want to honor this integral part of our workforce at the Department of Energy.  From the earliest days of the...

  8. EPA and DOE Honor 2015 Energy Star Partners of the Year, Recognizing Leadership and Action in Energy Efficiency, Featuring Better Buildings Challenge

    Broader source: Energy.gov [DOE]

    128 businesses and organizations in 33 states across the nation, are being honored by the U.S. Environmental Protection Agency and the U.S. Department of Energy with the Energy Stars Partner of...

  9. Shiny quantum dots brighten future of solar cells

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

    Shiny quantum dots brighten future of solar cells Shiny quantum dots brighten future of solar cells The project demonstrates that superior light-emitting properties of quantum dots can be applied in solar energy by helping more efficiently harvest sunlight. April 14, 2014 Quantum dot LSC devices under ultraviolet illumination. Quantum dot LSC devices under ultraviolet illumination. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "The key accomplishment is the

  10. What the Blank Makes Quantum Dots Blink?

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

    if scientists can stop them blinking. (Photo by Antipoff, CC BY-SA 3.0) Quantum dots are nanoparticles of semiconductor that can be tuned to glow in a rainbow of colors. ...

  11. Nontoxic quantum dot research improves solar cells

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

    Nancy Ambrosiano Communications Office (505) 667-0471 Email "For the first time, we have certified the performance of a quantum dot sensitized solar cell at greater than 5 percent, ...

  12. DOT Awards University Transportation Centers $63 Million

    Broader source: Energy.gov [DOE]

    The U.S. Department of Transportation's (DOT) announced approximately $63 million in grants to 33 University Transportation Centers to advance research and education programs that address critical transportation challenges.

  13. First principle thousand atom quantum dot calculations

    SciTech Connect (OSTI)

    Wang, Lin-Wang; Li, Jingbo

    2004-03-30

    A charge patching method and an idealized surface passivation are used to calculate the single electronic states of IV-IV, III-V, II-VI semiconductor quantum dots up to a thousand atoms. This approach scales linearly and has a 1000 fold speed-up compared to direct first principle methods with a cost of eigen energy error of about 20 meV. The calculated quantum dot band gaps are parametrized for future references.

  14. Structure in solution of the RNAter dot DNA hybrid (rA) sub 8 ter dot (dT)

    Office of Scientific and Technical Information (OSTI)

    sub 8 determined by NMR and Raman spectroscopy (Journal Article) | SciTech Connect Structure in solution of the RNAter dot DNA hybrid (rA) sub 8 ter dot (dT) sub 8 determined by NMR and Raman spectroscopy Citation Details In-Document Search Title: Structure in solution of the RNAter dot DNA hybrid (rA) sub 8 ter dot (dT) sub 8 determined by NMR and Raman spectroscopy The solution structure of the hybrid RNA{center dot}DNA octamer (rA){sub 8}{center dot}(dT){sub 8} has been determined by

  15. Next-Generation "Giant" Quantum Dots: Performance-Engineered...

    Energy Savers [EERE]

    Project Objective This project seeks to develop quantum-dot downconverters to be used in LED lighting. The focus will be on synthesizing red-emitting quantum dots, revealing their ...

  16. Surface treatment of nanocrystal quantum dots after film deposition

    DOE Patents [OSTI]

    Sykora, Milan; Koposov, Alexey; Fuke, Nobuhiro

    2015-02-03

    Provided are methods of surface treatment of nanocrystal quantum dots after film deposition so as to exchange the native ligands of the quantum dots for exchange ligands that result in improvement in charge extraction from the nanocrystals.

  17. Quantum Dot Tracers for Use in Engineered Geothermal

    Broader source: Energy.gov [DOE]

    Quantum Dot Tracers for Use in Engineered Geothermal presentation at the April 2013 peer review meeting held in Denver, Colorado.

  18. Quantum Dot-Based Cell Motility Assay

    SciTech Connect (OSTI)

    Gu, Weiwei; Pellegrino, Teresa; Parak Wolfgang J; Boudreau,Rosanne; Le Gros, Mark A.; Gerion, Daniele; Alivisatos, A. Paul; Larabell, Carolyn A.

    2005-06-06

    Because of their favorable physical and photochemical properties, colloidal CdSe/ZnS-semiconductor nanocrystals (commonly known as quantum dots) have enormous potential for use in biological imaging. In this report, we present an assay that uses quantum dots as markers to quantify cell motility. Cells that are seeded onto a homogeneous layer of quantum dots engulf and absorb the nanocrystals and, as a consequence, leave behind a fluorescence-free trail. By subsequently determining the ratio of cell area to fluorescence-free track area, we show that it is possible to differentiate between invasive and noninvasive cancer cells. Because this assay uses simple fluorescence detection, requires no significant data processing, and can be used in live-cell studies, it has the potential to be a powerful new tool for discriminating between invasive and noninvasive cancer cell lines or for studying cell signaling events involved in migration.

  19. Exciton binding energy in semiconductor quantum dots

    SciTech Connect (OSTI)

    Pokutnii, S. I.

    2010-04-15

    In the adiabatic approximation in the context of the modified effective mass approach, in which the reduced exciton effective mass {mu} = {mu}(a) is a function of the radius a of the semiconductor quantum dot, an expression for the exciton binding energy E{sub ex}(a) in the quantum dot is derived. It is found that, in the CdSe and CdS quantum dots with the radii a comparable to the Bohr exciton radii a{sub ex}, the exciton binding energy E{sub ex}(a) is substantially (respectively, 7.4 and 4.5 times) higher than the exciton binding energy in the CdSe and CdS single crystals.

  20. Bilayer graphene quantum dot defined by topgates

    SciTech Connect (OSTI)

    Müller, André; Kaestner, Bernd; Hohls, Frank; Weimann, Thomas; Pierz, Klaus; Schumacher, Hans W.

    2014-06-21

    We investigate the application of nanoscale topgates on exfoliated bilayer graphene to define quantum dot devices. At temperatures below 500 mK, the conductance underneath the grounded gates is suppressed, which we attribute to nearest neighbour hopping and strain-induced piezoelectric fields. The gate-layout can thus be used to define resistive regions by tuning into the corresponding temperature range. We use this method to define a quantum dot structure in bilayer graphene showing Coulomb blockade oscillations consistent with the gate layout.

  1. Kondo and mixed-valence regimes in multilevel quantum dots

    SciTech Connect (OSTI)

    Chudnovskiy, A. L.; Ulloa, S. E.

    2001-04-15

    We investigate the dependence of the ground state of a multilevel quantum dot on the coupling to an external fermionic system and on the interactions in the dot. As the coupling to the external system increases, the rearrangement of the effective energy levels in the dot signals the transition from the Kondo regime to a mixed-valence (MV) regime. The MV regime in a two-level dot is characterized by an intrinsic mixing of the levels in the dot, resulting in nonperturbative subtunneling and supertunneling phenomena that strongly influence the Kondo effect.

  2. Synthesis of CdSe quantum dots for quantum dot sensitized solar cell

    SciTech Connect (OSTI)

    Singh, Neetu Kapoor, Avinashi; Kumar, Vinod; Mehra, R. M.

    2014-04-24

    CdSe Quantum Dots (QDs) of size 0.85 nm were synthesized using chemical route. ZnO based Quantum Dot Sensitized Solar Cell (QDSSC) was fabricated using CdSe QDs as sensitizer. The Pre-synthesized QDs were found to be successfully adsorbed on front ZnO electrode and had potential to replace organic dyes in Dye Sensitized Solar Cells (DSSCs). The efficiency of QDSSC was obtained to be 2.06 % at AM 1.5.

  3. Geometric spin manipulation in semiconductor quantum dots

    SciTech Connect (OSTI)

    Prabhakar, Sanjay Melnik, Roderick; Inomata, Akira

    2014-04-07

    We propose a method to flip the spin completely by an adiabatic transport of quantum dots. We show that it is possible to flip the spin by inducing a geometric phase on the spin state of a quantum dot. We estimate the geometric spin flip time (approximately 2 ps) which turned out to be much shorter than the experimentally reported decoherence time (approximately 100 ns) that would provide an alternative means of fliping the spin before reaching decoherence. It is important that both the Rashba coupling and the Dresselhaus coupling are present for inducing a phase necessary for spin flip. If one of them is absent, the induced phase is trivial and irrelevant for spin-flip.

  4. Research Challenge 2: Quantum Dots and Phosphors

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

    2: Quantum Dots and Phosphors - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs

  5. Controlling quantum dot energies using submonolayer bandstructure engineering

    SciTech Connect (OSTI)

    Yu, L.; Law, S.; Wasserman, D.; Jung, D.; Lee, M. L.; Shen, J.; Cha, J. J.

    2014-08-25

    We demonstrate control of energy states in epitaxially-grown quantum dot structures formed by stacked submonolayer InAs depositions via engineering of the internal bandstructure of the dots. Transmission electron microscopy of the stacked sub-monolayer regions shows compositional inhomogeneity, indicative of the presence of quantum dots. The quantum dot ground state is manipulated not only by the number of deposited InAs layers, but also by control of the thickness and material composition of the spacing layers between submonolayer InAs depositions. In this manner, we demonstrate the ability to shift the quantum dot ground state energy at 77?K from 1.38?eV to 1.88?eV. The results presented offer a potential avenue towards enhanced control of dot energies for a variety of optoelectronic applications.

  6. Nanoscale engineering boosts performance of quantum dot light emitting

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

    diodes Quantum dot light emitting diodes Nanoscale engineering boosts performance of quantum dot light emitting diodes Quantum dots are nano-sized semiconductor particles whose emission color can be tuned by simply changing their dimensions. October 25, 2013 Postdoctoral researcher Young-Shin Park characterizing emission spectra of LEDs in the Los Alamos National Laboratory optical laboratory. Postdoctoral researcher Young-Shin Park characterizing emission spectra of LEDs in the Los Alamos

  7. Spin filtering in a double quantum dot device: Numerical renormalization

    Office of Scientific and Technical Information (OSTI)

    group study of the internal structure of the Kondo state (Journal Article) | SciTech Connect Spin filtering in a double quantum dot device: Numerical renormalization group study of the internal structure of the Kondo state Citation Details In-Document Search Title: Spin filtering in a double quantum dot device: Numerical renormalization group study of the internal structure of the Kondo state A double quantum dot device, connected to two channels that only interact through interdot Coulomb

  8. Tunnel magnetoresistance and linear conductance of double quantum dots

    Office of Scientific and Technical Information (OSTI)

    strongly coupled to ferromagnetic leads (Journal Article) | SciTech Connect Tunnel magnetoresistance and linear conductance of double quantum dots strongly coupled to ferromagnetic leads Citation Details In-Document Search Title: Tunnel magnetoresistance and linear conductance of double quantum dots strongly coupled to ferromagnetic leads We analyze the spin-dependent linear-response transport properties of double quantum dots strongly coupled to external ferromagnetic leads. By using the

  9. Plasmonic giant quantum dots: Hybrid nanostructures for truly...

    Office of Scientific and Technical Information (OSTI)

    Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical ... Visit OSTI to utilize additional information resources in energy science and technology. A ...

  10. Sandia Energy - Research Challenge 2: Quantum Dots and Phosphors

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

    2: Quantum Dots and Phosphors Home Energy Research EFRCs Solid-State Lighting Science EFRC Our SSLS EFRC's Scientific Research Challenges and Publications Research Challenge 2:...

  11. RKKY interaction in a chirally coupled double quantum dot system...

    Office of Scientific and Technical Information (OSTI)

    Title: RKKY interaction in a chirally coupled double quantum dot system The competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction is ...

  12. Cornell dots research collaboration leads to $10M cancer center...

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

    at MSKCC in New York City - will focus on melanoma (skin) and malignant brain cancers. ... Assessment of particles in brain tumors for cancer therapy. C dots successfully have ...

  13. Dear Mr. Harris,

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

    The regulations define the basic model as any product that has a different energy use or ... I do not think the process the DOE used for Commercial Refrigeration Equipment was fair ...

  14. Harry A. Atwater - JCAP

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

    Theory of Earth's Evolution Harold Urey, Deuterium, Cosmochemistry, Studies of the Origin of Life, and Theory of Earth's Evolution Resources with Additional Information * Patents * News Releases About Urey * Named After Him * Additional Web Pages Harold Urey Courtesy of A&M-Commerce "Harold Clayton Urey was a scientist of considerable scope whose discovery of deuterium helped him win the Nobel Prize for Chemistry in 1934. ... [In 1931 he] had discovered the existence of heavy water,

  15. TO : W. B. Harris

    Office of Legacy Management (LM)

    explosibility t per cubic rneterof air: rations obtained sts,in milligram5 Sample Description , of Corlc Samples Aver ntration (mg Um3 air) High Lox 1. General Air at Test Hood ...

  16. Applicability of the {bold k}{center_dot}{bold p} method to the electronic structure of quantum dots

    SciTech Connect (OSTI)

    Fu, H.; Wang, L.; Zunger, A.

    1998-04-01

    The {bold k}{center_dot}{bold p} method has become the {open_quotes}standard model{close_quotes} for describing the electronic structure of nanometer-size quantum dots. In this paper we perform parallel {bold k}{center_dot}{bold p} (6{times}6 and 8{times}8) and direct-diagonalization pseudopotential studies on spherical quantum dots of an ionic material{emdash}CdSe, and a covalent material{emdash}InP. By using an equivalent input in both approaches, i.e., starting from a given atomic pseudopotential and deriving from it the Luttinger parameters in {bold k}{center_dot}{bold p} calculation, we investigate the effect of the different underlying wave-function representations used in {bold k}{center_dot}{bold p} and in the more exact pseudopotential direct diagonalization. We find that (i) the 6{times}6{bold k}{center_dot}{bold p} envelope function has a distinct (odd or even) parity, while atomistic wave function is parity-mixed. The 6{times}6{bold k}{center_dot}{bold p} approach produces an incorrect order of the highest valence states for both InP and CdSe dots: the p-like level is above the s-like level. (ii) It fails to reveal that the second conduction state in small InP dots is folded from the L point in the Brillouin zone. Instead, all states in {bold k}{center_dot}{bold p} are described as {Gamma}-like. (iii) The {bold k}{center_dot}{bold p} overestimates the confinement energies of both valence states and conduction states. A wave-function projection analysis shows that the principal reasons for these {bold k}{center_dot}{bold p} errors in dots are (a) use of restricted basis set, and (b) incorrect {ital bulk} dispersion relation. Error (a) can be reduced only by increasing the number of basis functions. Error (b) can be reduced by altering the {bold k}{center_dot}{bold p} implementation so as to bend upwards the second lowest bulk band, and to couple the conduction band into the s-like dot valence state. Our direct diagonalization approach provides an accurate and practical replacement to the standard model in that it is rather general, and can be performed simply on a standard workstation. {copyright} {ital 1998} {ital The American Physical Society}

  17. Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous

    Office of Scientific and Technical Information (OSTI)

    optical imaging, photothermal effect and thermometry (Journal Article) | SciTech Connect Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry Citation Details In-Document Search Title: Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry Hybrid semiconductor-metal nanoscale constructs are of both fundamental and practical interest.

  18. DOT-7A packaging test procedure

    SciTech Connect (OSTI)

    Kelly, D.L.

    1995-01-23

    This test procedure documents the steps involved with performance testing of Department of Transportation Specification 7A (DOT-7A) Type A packages. It includes description of the performance tests, the personnel involved, appropriate safety considerations, and the procedures to be followed while performing the tests. Westinghouse Hanford Company (WHC) is conducting the evaluation and testing discussed herein for the Department of Energy-Headquarters, Division of Quality Verification and Transportation Safety (EH-321). Please note that this report is not in WHC format. This report is being submitted through the Engineering Documentation System so that it may be used for reference and information purposes.

  19. Relaxation dynamics in correlated quantum dots

    SciTech Connect (OSTI)

    Andergassen, S.; Schuricht, D.; Pletyukhov, M.; Schoeller, H.

    2014-12-04

    We study quantum many-body effects on the real-time evolution of the current through quantum dots. By using a non-equilibrium renormalization group approach, we provide analytic results for the relaxation dynamics into the stationary state and identify the microscopic cutoff scales that determine the transport rates. We find rich non-equilibrium physics induced by the interplay of the different energy scales. While the short-time limit is governed by universal dynamics, the long-time behavior features characteristic oscillations as well as an interplay of exponential and power-law decay.

  20. RKKY interaction in a chirally coupled double quantum dot system

    SciTech Connect (OSTI)

    Heine, A. W.; Tutuc, D.; Haug, R. J.; Zwicknagl, G.; Schuh, D.; Wegscheider, W.

    2013-12-04

    The competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction is investigated in a double quantum dots system, coupled via a central open conducting region. A perpendicular magnetic field induces the formation of Landau Levels which in turn give rise to the so-called Kondo chessboard pattern in the transport through the quantum dots. The two quantum dots become therefore chirally coupled via the edge channels formed in the open conducting area. In regions where both quantum dots exhibit Kondo transport the presence of the RKKY exchange interaction is probed by an analysis of the temperature dependence. The thus obtained Kondo temperature of one dot shows an abrupt increase at the onset of Kondo transport in the other, independent of the magnetic field polarity, i.e. edge state chirality in the central region.

  1. Kondo effect in coupled quantum dots under magnetic fields

    SciTech Connect (OSTI)

    Aono, Tomosuke; Eto, Mikio

    2001-08-15

    The Kondo effect in coupled quantum dots is investigated theoretically under magnetic fields. We show that the magnetoconductance (MC) illustrates the peak structures of Kondo resonant spectra. When the dot-dot tunneling coupling V{sub C} is smaller than the dot-lead coupling {Delta} (level broadening), Kondo resonant levels appear at the Fermi level (E{sub F}). The Zeeman splitting of the levels weakens the Kondo effect, which results in a negative MC. When V{sub C} is larger than {Delta}, the Kondo resonances form bonding and antibonding levels, located below and above E{sub F}, respectively. We observe a positive MC since the Zeeman splitting increases the overlap between the levels at E{sub F}. In the presence of antiferromagnetic spin coupling between the dots, the sign of the MC can change as a function of the gate voltage.

  2. Proud to Be a Girl - A Visit to Oak Ridge National Laboratory | Department

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

    of Energy Girls from Martha O'Bryan Community Center and Maryville Christian School visiting Director Dot Harris at Oak Ridge National Laboratory discussed STEM careers, educational opportunities, and exploring science this August. Girls from Martha O'Bryan Community Center and Maryville Christian School visiting Director Dot Harris at Oak Ridge National Laboratory discussed STEM careers, educational opportunities, and exploring science this August. Dot Harris Dot Harris Director, Office of

  3. Competing interactions in semiconductor quantum dots

    SciTech Connect (OSTI)

    van den Berg, R.; Brandino, G. P.; El Araby, O.; Konik, R. M.; Gritsev, V.; Caux, J. -S.

    2014-10-01

    We introduce an integrability-based method enabling the study of semiconductor quantum dot models incorporating both the full hyperfine interaction as well as a mean-field treatment of dipole-dipole interactions in the nuclear spin bath. By performing free induction decay and spin echo simulations we characterize the combined effect of both types of interactions on the decoherence of the electron spin, for external fields ranging from low to high values. We show that for spin echo simulations the hyperfine interaction is the dominant source of decoherence at short times for low fields, and competes with the dipole-dipole interactions at longer times. On the contrary, at high fields the main source of decay is due to the dipole-dipole interactions. In the latter regime an asymmetry in the echo is observed. Furthermore, the non-decaying fraction previously observed for zero field free induction decay simulations in quantum dots with only hyperfine interactions, is destroyed for longer times by the mean-field treatment of the dipolar interactions.

  4. Competing interactions in semiconductor quantum dots

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

    van den Berg, R.; Brandino, G. P.; El Araby, O.; Konik, R. M.; Gritsev, V.; Caux, J. -S.

    2014-10-14

    In this study, we introduce an integrability-based method enabling the study of semiconductor quantum dot models incorporating both the full hyperfine interaction as well as a mean-field treatment of dipole-dipole interactions in the nuclear spin bath. By performing free induction decay and spin echo simulations we characterize the combined effect of both types of interactions on the decoherence of the electron spin, for external fields ranging from low to high values. We show that for spin echo simulations the hyperfine interaction is the dominant source of decoherence at short times for low fields, and competes with the dipole-dipole interactions atmore » longer times. On the contrary, at high fields the main source of decay is due to the dipole-dipole interactions. In the latter regime an asymmetry in the echo is observed. Furthermore, the non-decaying fraction previously observed for zero field free induction decay simulations in quantum dots with only hyperfine interactions, is destroyed for longer times by the mean-field treatment of the dipolar interactions.« less

  5. Electronic confinement in modulation doped quantum dots (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Electronic confinement in modulation doped quantum dots Citation Details In-Document Search Title: Electronic confinement in modulation doped quantum dots Modulation doping, an effective way to dope quantum dots (QDs), modifies the confinement energy levels in the QDs. We present a self-consistent full multi-grid solver to analyze the effect of modulation doping on the confinement energy levels in large-area structures containing Si QDs in SiO{sub 2} and Si{sub 3}N{sub 4}

  6. Zeno-logic applications of semiconductor quantum dots

    SciTech Connect (OSTI)

    Schneebeli, L.; Peyghambarian, N.; Feldtmann, T.; Kira, M.; Koch, S. W.

    2010-05-15

    Microscopic calculations show that CdSe-based semiconductor quantum dots with confined exciton and biexciton states are suitable candidates for Zeno-logic applications. The frequencies of the control and signal fields are chosen to guarantee very high transmission of the individual beams. If both fields are present simultaneously, they are strongly absorbed due to efficient ground-state-to-biexciton transitions. The optical Bloch equations for a three-level quantum-dot model with self-consistent light-matter coupling are solved numerically. The influence of dephasing and/or inhomogeneous dot distributions is analyzed and the conditions for satisfactory device operation are identified.

  7. Generation of even harmonics in coupled quantum dots

    SciTech Connect (OSTI)

    Guo Shifang; Duan Suqing; Yang Ning; Chu Weidong; Zhang Wei

    2011-07-15

    Using the spatial-temporal symmetry principle we developed recently, we propose an effective scheme for even-harmonics generation in coupled quantum dots. The relative intensity of odd and even harmonic components in the emission spectrum can be controlled by tuning the dipole couplings among the dots, which can be realized in experiments by careful design of the nanostructures. In particular, pure 2nth harmonics and (2n+1)th harmonics (where n is an integer) can be generated simultaneously with polarizations in two mutual perpendicular directions in our systems. An experimental design of the coupled dots system is presented.

  8. Electron states in semiconductor quantum dots

    SciTech Connect (OSTI)

    Dhayal, Suman S.; Ramaniah, Lavanya M.; Ruda, Harry E.; Nair, Selvakumar V.

    2014-11-28

    In this work, the electronic structures of quantum dots (QDs) of nine direct band gap semiconductor materials belonging to the group II-VI and III-V families are investigated, within the empirical tight-binding framework, in the effective bond orbital model. This methodology is shown to accurately describe these systems, yielding, at the same time, qualitative insights into their electronic properties. Various features of the bulk band structure such as band-gaps, band curvature, and band widths around symmetry points affect the quantum confinement of electrons and holes. These effects are identified and quantified. A comparison with experimental data yields good agreement with the calculations. These theoretical results would help quantify the optical response of QDs of these materials and provide useful input for applications.

  9. TxDOT Access Management Manual | Open Energy Information

    Open Energy Info (EERE)

    Access Management Manual Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- OtherOther: TxDOT Access Management ManualLegal Abstract Manual prepared...

  10. Comparison of quantum confinement effects between quantum wires and dots

    SciTech Connect (OSTI)

    Li, Jingbo; Wang, Lin-Wang

    2004-03-30

    Dimensionality is an important factor to govern the electronic structures of semiconductor nanocrystals. The quantum confinement energies in one-dimensional quantum wires and zero-dimensional quantum dots are quite different. Using large-scale first-principles calculations, we systematically study the electronic structures of semiconductor (including group IV, III-V, and II-VI) surface-passivated quantum wires and dots. The band-gap energies of quantum wires and dots have the same scaling with diameter for a given material. The ratio of band-gap-increases between quantum wires and dots is material-dependent, and slightly deviates from 0.586 predicted by effective-mass approximation. Highly linear polarization of photoluminescence in quantum wires is found. The degree of polarization decreases with the increasing temperature and size.

  11. Quantum dot conjugates in a sub-micrometer fluidic channel

    DOE Patents [OSTI]

    Stavis, Samuel M.; Edel, Joshua B.; Samiee, Kevan T.; Craighead, Harold G.

    2008-07-29

    A nanofluidic channel fabricated in fused silica with an approximately 500 nm square cross section was used to isolate, detect and identify individual quantum dot conjugates. The channel enables the rapid detection of every fluorescent entity in solution. A laser of selected wavelength was used to excite multiple species of quantum dots and organic molecules, and the emission spectra were resolved without significant signal rejection. Quantum dots were then conjugated with organic molecules and detected to demonstrate efficient multicolor detection. PCH was used to analyze coincident detection and to characterize the degree of binding. The use of a small fluidic channel to detect quantum dots as fluorescent labels was shown to be an efficient technique for multiplexed single molecule studies. Detection of single molecule binding events has a variety of applications including high throughput immunoassays.

  12. Quantum dot conjugates in a sub-micrometer fluidic channel

    DOE Patents [OSTI]

    Stavis, Samuel M.; Edel, Joshua B.; Samiee, Kevan T.; Craighead, Harold G.

    2010-04-13

    A nanofluidic channel fabricated in fused silica with an approximately 500 nm square cross section was used to isolate, detect and identify individual quantum dot conjugates. The channel enables the rapid detection of every fluorescent entity in solution. A laser of selected wavelength was used to excite multiple species of quantum dots and organic molecules, and the emission spectra were resolved without significant signal rejection. Quantum dots were then conjugated with organic molecules and detected to demonstrate efficient multicolor detection. PCH was used to analyze coincident detection and to characterize the degree of binding. The use of a small fluidic channel to detect quantum dots as fluorescent labels was shown to be an efficient technique for multiplexed single molecule studies. Detection of single molecule binding events has a variety of applications including high throughput immunoassays.

  13. Quantum Dot Tracers for Use in Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: To develop and demonstrate a new class of tracers„semiconductor nanoparticles(quantum dots)„that offer great promise for use in characterizing fracture networks in EGS reservoirs.

  14. Lifetime blinking in nonblinking nanocrystal quantum dots (Journal Article)

    Office of Scientific and Technical Information (OSTI)

    | SciTech Connect Lifetime blinking in nonblinking nanocrystal quantum dots Citation Details In-Document Search Title: Lifetime blinking in nonblinking nanocrystal quantum dots Authors: Galland, Christophe ; Ghosh, Yagnaseni ; Steinbruck, Andrea ; Hollingsworth, Jennifer A. ; Htoon, Han ; Klimov, Victor I. Publication Date: 2012-06-19 OSTI Identifier: 1080743 DOE Contract Number: AC52-06NA25396 Resource Type: Journal Article Resource Relation: Journal Name: Nature Communications; Journal

  15. Los Alamos Quantum Dots for Solar, Display Technology

    SciTech Connect (OSTI)

    Klimov, Victor

    2015-04-13

    Quantum dots are ultra-small bits of semiconductor matter that can be synthesized with nearly atomic precision via modern methods of colloidal chemistry. Their emission color can be tuned by simply varying their dimensions. Color tunability is combined with high emission efficiencies approaching 100 percent. These properties have recently become the basis of a new technology – quantum dot displays – employed, for example, in the newest generation of e-readers and video monitors.

  16. NREL and Partners Demonstrate Quantum Dots that Assemble Themselves - News

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

    Releases | NREL and Partners Demonstrate Quantum Dots that Assemble Themselves Surprising breakthrough could bolster quantum photonics, solar cell efficiency February 8, 2013 Scientists from the U.S. Department of Energy's National Renewable Energy Laboratory and other labs have demonstrated a process whereby quantum dots can self-assemble at optimal locations in nanowires, a breakthrough that could improve solar cells, quantum computing, and lighting devices. A paper on the new technology,

  17. Controlling thermal conductance through quantum dot roughening at

    Office of Scientific and Technical Information (OSTI)

    interfaces. (Journal Article) | SciTech Connect Journal Article: Controlling thermal conductance through quantum dot roughening at interfaces. Citation Details In-Document Search Title: Controlling thermal conductance through quantum dot roughening at interfaces. Abstract not provided. Authors: Hopkins, Patrick Edward ; Duda, John C. ; Petz, Christopher W. ; Floro, Jerrold A. Publication Date: 2011-01-01 OSTI Identifier: 1110382 Report Number(s): SAND2011-0398J 473795 DOE Contract Number:

  18. Deformation potentials of CdSe quantum dots

    SciTech Connect (OSTI)

    Li, Jingbo; Wang, Lin-Wang

    2004-06-02

    The size dependent deformation potentials of CdSe quantum dots are studied by first principle and semi-empirical pseudopotentials calculations. They find that the amplitude of the quantum dot deformation potential is only slightly larger than the bulk value, and this increase is mostly caused by the off {Lambda} point deformation potentials in the bulk, which are larger in amplitude than the {Lambda} point deformation potential.

  19. Metal Halide Surface Treatment of Quantum Dots - Energy Innovation Portal

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

    Advanced Materials Advanced Materials Find More Like This Return to Search Metal Halide Surface Treatment of Quantum Dots National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary Quantum dot (QD) solids are a solution-processed, composite thin film semiconductor system that is being developed for optoelectronics (display technology, solid state lighting, next generation photovoltaics, photodetector application, etc.). For photovoltaics, in addition to

  20. Unraveling the mystery of quantum-dot blinking

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

    Unraveling the mystery of quantum-dot blinking Unraveling the mystery of quantum-dot blinking Research enhances single particle tracking, allows novel light-emitting diodes, and boosts development of new solar cells. April 3, 2012 Artists conception of how solving the problem of quantum blinking may lead to applications in areas such as solid state lighting. Artists conception of how solving the problem of quantum blinking may lead to applications in areas such as solid state lighting. Get

  1. Scalable quantum computer architecture with coupled donor-quantum dot qubits

    DOE Patents [OSTI]

    Schenkel, Thomas; Lo, Cheuk Chi; Weis, Christoph; Lyon, Stephen; Tyryshkin, Alexei; Bokor, Jeffrey

    2014-08-26

    A quantum bit computing architecture includes a plurality of single spin memory donor atoms embedded in a semiconductor layer, a plurality of quantum dots arranged with the semiconductor layer and aligned with the donor atoms, wherein a first voltage applied across at least one pair of the aligned quantum dot and donor atom controls a donor-quantum dot coupling. A method of performing quantum computing in a scalable architecture quantum computing apparatus includes arranging a pattern of single spin memory donor atoms in a semiconductor layer, forming a plurality of quantum dots arranged with the semiconductor layer and aligned with the donor atoms, applying a first voltage across at least one aligned pair of a quantum dot and donor atom to control a donor-quantum dot coupling, and applying a second voltage between one or more quantum dots to control a Heisenberg exchange J coupling between quantum dots and to cause transport of a single spin polarized electron between quantum dots.

  2. Magneto-optical absorption in semiconducting spherical quantum dots: Influence of the dot-size, confining potential, and magnetic field

    SciTech Connect (OSTI)

    Kushwaha, Manvir S.

    2014-12-15

    Semiconducting quantum dots – more fancifully dubbed artificial atoms – are quasi-zero dimensional, tiny, man-made systems with charge carriers completely confined in all three dimensions. The scientific quest behind the synthesis of quantum dots is to create and control future electronic and optical nanostructures engineered through tailoring size, shape, and composition. The complete confinement – or the lack of any degree of freedom for the electrons (and/or holes) – in quantum dots limits the exploration of spatially localized elementary excitations such as plasmons to direct rather than reciprocal space. Here we embark on a thorough investigation of the magneto-optical absorption in semiconducting spherical quantum dots characterized by a confining harmonic potential and an applied magnetic field in the symmetric gauge. This is done within the framework of Bohm-Pines’ random-phase approximation that enables us to derive and discuss the full Dyson equation that takes proper account of the Coulomb interactions. As an application of our theoretical strategy, we compute various single-particle and many-particle phenomena such as the Fock-Darwin spectrum; Fermi energy; magneto-optical transitions; probability distribution; and the magneto-optical absorption in the quantum dots. It is observed that the role of an applied magnetic field on the absorption spectrum is comparable to that of a confining potential. Increasing (decreasing) the strength of the magnetic field or the confining potential is found to be analogous to shrinking (expanding) the size of the quantum dots: resulting into a blue (red) shift in the absorption spectrum. The Fermi energy diminishes with both increasing magnetic-field and dot-size; and exhibits saw-tooth-like oscillations at large values of field or dot-size. Unlike laterally confined quantum dots, both (upper and lower) magneto-optical transitions survive even in the extreme instances. However, the intra-Landau level transitions are seen to be forbidden. The spherical quantum dots have an edge over the strictly two-dimensional quantum dots in that the additional (magnetic) quantum number makes the physics richer (but complex). A deeper grasp of the Coulomb blockade, quantum coherence, and entanglement can lead to a better insight into promising applications involving lasers, detectors, storage devices, and quantum computing.

  3. Effect of carrier dynamics and temperature on two-state lasing in semiconductor quantum dot lasers

    SciTech Connect (OSTI)

    Korenev, V. V. Savelyev, A. V.; Zhukov, A. E.; Omelchenko, A. V.; Maximov, M. V.

    2013-10-15

    It is analytically shown that the both the charge carrier dynamics in quantum dots and their capture into the quantum dots from the matrix material have a significant effect on two-state lasing phenomenon in quantum dot lasers. In particular, the consideration of desynchronization in electron and hole capture into quantum dots allows one to describe the quenching of ground-state lasing observed at high injection currents both qualitatevely and quantitatively. At the same time, an analysis of the charge carrier dynamics in a single quantum dot allowed us to describe the temperature dependences of the emission power via the ground- and excited-state optical transitions of quantum dots.

  4. The Honorable W

    Office of Legacy Management (LM)

    ... Louis Downtown Site. . .,' ' . f 0 EN-CLOSURE FORMERLY UTILSZED.SITES REMEDIAL ACTION PROGRAM (FUSRAP) DuPont Maywood . Wayne . Middlesex Sampling Plant ' Ashland 1 Ashland 2 ...

  5. The Honorable Ernest Moniz

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

    Electric Cooperative Association (NRECA) and the American Public Power Association (APPA) together represent over 1,200 cooperative and publicly owned utilities in 34 states...

  6. Honore_1986.pdf

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

  7. The Honorable Dick Cheney

    Energy Savers [EERE]

    February 27, 2012 Mr. Brian Mills Office of Electricity Delivery and Energy Reliability (OE-20) U.S. Department of Energy 1000 Independence Avenue, SW Washington, DC 20585 Re: Notice of Proposed Rulemaking: Coordination of Federal Authorizations for Electric Transmission Facilities Dear Mr. Mills: I am writing, on behalf of the multi-sector membership of the Western Business Roundtable ("Roundtable"), regarding the Department of Energy's ("DOE") notice of proposed rulemaking

  8. The Honorable Rodney Mortemsem

    Office of Legacy Management (LM)

    condition and, where it has authority, ,performing ,environment. I Off-SiteSavannah RiverDivision' Office of Eastern Area Programs Office of Environmental Restoration' ...

  9. The Honorable James Sharpe

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of mystaff: Enclosures James W. Wagoner II ' ' . I Director Off-SiteSavannah River Division Office of Eastern Area Programs Office of ...

  10. ,The Honorable Donald Hart

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427:1719) of,my,staff. . . ,:.'..;: '. ,;, (pt+& ;, ,.',, :.' I James W. Wagoner II ' . ' .' . ' Director Off-SiteSavannah River Division ...

  11. The Honorable Bernard Chaffer

    Office of Legacy Management (LM)

    W. Alexqnder Willipms.(301-427-1719) of my staff. 'James W. .Wacjonei. II Director Off-SiteSavannah River Division Office of Eastern Area,Programs Office of Environmental ...

  12. The Honorable Chalmer Emmendorf

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of my staff. Enclosures Sincerely, Director Off-SiteSavannah River Division Office of Eastern Area Programs Office of Environmental ...

  13. The Honorable Richard M

    Office of Legacy Management (LM)

    Al,exand,er W illiams (301-427-1719) of my staff. I' Sincerely, - '8 , James W . Wagoner II -Director " "'. '. . O ff-SiteSavannah River Program Division . O ffice of ...

  14. The Honorable Ed Austin

    Office of Legacy Management (LM)

    I Enclosures dames W. Wagoner II . ' I Director Off-SiteSavannah River Program Division Office of Eastern Area Programs .' Office of Environmental Restoration iiiphreys Gold Co ...

  15. The Honorable Jim Gasparini~

    Office of Legacy Management (LM)

    W. ., Enclosures . cc: ' ,U.,. ; ames W.,Wagoner II ., Director Off-SiteSavannah River Division : : : Office of Eastern Area Programs Office of Environmental Restoration . ...

  16. The Honorable Richard M

    Office of Legacy Management (LM)

    Alexander W illiams (301-427-1719) of my staff. Sincerely, Director Enclosures Off-SiteSavannah River Division Office of Eastern Area Programs Office of Environmental Restoration ...

  17. The Honorable Bernie Johnson

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of my staff. Enclosures James W. Wagoner II Director Off-SiteSavannah River Division Office of Eastern Area Programs Office of Environmental ...

  18. The Honorable George Livingston

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of my staff. Enclosures (fld5iT& James W. Wagoner II Director Off-SiteSavannah River Division Office of Eastern Area Programs Office of ...

  19. The Honorable Aaron Thompson.

    Office of Legacy Management (LM)

    Alexander W illjams (301-427-1719) of my staff. :' , ' James W . Wagoner II . Director Off-SiteSavannah River division Office of ,Eastern Area Programs Enclosures Office of ...

  20. The Honorable Stephens.

    Office of Legacy Management (LM)

    If,you have any questions, please feel,free &call me at 3OI-427-1721 o,r Dr. W.,Alexander W illiams (301-427-179) of my staff.' ,, Off-SiteSavannah River Program Division ...

  1. The Honorable Patricia Titer -

    Office of Legacy Management (LM)

    If you have any questions, please feel free to call me at 301-427-1721 or Dr,. W..Alexander Williams (301-427-1719) of my staff. Off-SiteSavannah River Program Division ' ...

  2. The Honorable Anthony Mosillo'

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719)'of my staff.,;- ; , ; ,' ,' ., : ,.. j, 1 .'g&&,:,; ,, : ,I ames W. Wagoner II , Director Off-SiteSavannah River Division Office of' ...

  3. The Honorable T

    Office of Legacy Management (LM)

    47402 , Dear Mayor Allison: Secretary of Energy Hazel ... action to meet current radiological protection requirements. ... call meat 301-427-1721 or Dr:W. Alejtandet- W illiams ...

  4. honors and awards

    National Nuclear Security Administration (NNSA)

    Defense Programs Award of Excellence for their help in securing supply of a critical material for the Departments of Energy and Defense.

    The four Pantexans, Tod Botcher,...

  5. The Honorable Ernest Moniz

    Office of Environmental Management (EM)

    Student Edition The Harnessed Atom - Student Edition The Harnessed Atom is a middle school science, technology, engineering, and math (STEM) curriculum extension that focuses on nuclear science and energy. It is designed to provide students with accurate, unbiased, and up-to-date information on the roles that energy and nuclear science play in our lives. The curriculum includes essential principles and fundamental concepts of energy science. This update is based on the original 1985 Harnessed

  6. The Honorable Dick Cheney

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

    February 27, 2012 Mr. Brian Mills Office of Electricity ... Authorizations for Electric Transmission Facilities Dear Mr. ... significant additional investment in interstate ...

  7. Honoring Energy Department Vets

    ScienceCinema (OSTI)

    Chu, Steven; Majors, Alvan; Underwood, David;

    2013-05-29

    Veterans from the Army, Air Force, Navy, Marine Corps and the National Guard who work at the Department of Energy met Wednesday with Secretary Steven Chu, who hosted more than a dozen former service members to thank them for their continued service to America.

  8. ESnet awarded honorable mention

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

    was established in 2000 to encourage and recognize innovative deployment of information technology in support of the University of California's mission of teaching, research,...

  9. ESnet Awards and Honors

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

    was established in 2000 to encourage and recognize innovative deployment of information technology in support of the University of California's mission of teaching, research,...

  10. New Los Alamos approach may be key to quantum dot solar cells...

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

    Quantum dot solar cells with real gains in efficiency New Los Alamos approach may be key to quantum dot ... of a single photon from the high-energy end of the solar spectrum ...

  11. Surface Induced Magnetism in Quantum Dots

    SciTech Connect (OSTI)

    Meulenberg, R W; Lee, J I

    2009-08-20

    The study of nanometer sized semiconductor crystallites, also known as quantum dots (QDs), has seen rapid advancements in recent years in scientific disciplines ranging from chemistry, physics, biology, materials science, and engineering. QD materials of CdSe, ZnSe, InP, as well as many others, can be prepared in the size range of 1-10 nm producing uniform, nearly monodisperse materials that are typically coated with organic molecules [1-3]. The strength of charge carrier confinement, which dictates the size-dependent properties, in these QDs depends on the nature of the material and can be correlated to the Bohr radius for the system of interest. For instance, the Bohr radius for CdSe is {approx} 5 nm, while in the more covalent structure of InP, the Bohr radius approaches {approx} 10 nm. The study of CdSe QDs has been particularly extensive during the last decade because they exhibit unique and tunable optical properties and are readily synthesized with high-crystallinity and narrow size dispersions. Although the core electronic properties of CdSe are explained in terms of the quantum confinement model, experimental efforts to elucidate the surface structure of these materials have been limited. Typically, colloidal CdSe QDs are coated with an organic surfactant, which typically consists of an organo-phosphine, -thiol, or -amine, that has the function of energetically relaxing defect states via coordination to partially coordinated surface atoms. The organic surfactant also acts to enhance carrier confinement and prevent agglomeration of the particles. Chemically, it has been shown that the bonding of the surfactant to the CdSe QD occurs through Cd atoms resulting cleavage of the Se atoms and formation of a Cd-rich (i.e. non-stoichiometric) particle [5].

  12. DOT-7A Type A packaging design guide

    SciTech Connect (OSTI)

    Kelly, D.L.

    1995-01-23

    The purpose of this Design Guide is to provide instruction for designing a U.S. Department of Transportation Specification 7A (DOT-7A) Type A packaging. Another purpose for this Design Guide is to support the evaluation and testing activities that are performed on new designs by a U.S. Department of Energy (DOE) test facility. This evaluation and testing program is called the DOT-7A Program. When an applicant has determined that a DOT-7A packaging is needed and not commercially available, a design may be created according to this document. The design should include a packaging drawing, specifications, analysis report, operating instructions, and a Packaging Qualification Checklist; all of which should be forwarded to a DOE/HQ approved test facility for evaluation and testing. This report is being submitted through the Engineering Documentation System so that it may be used for reference and information purposes.

  13. Quasi-periodic quantum dot arrays produced by electrochemical synthesis

    SciTech Connect (OSTI)

    Bandyopadhyay, S.; Miller, A.E.; Yue, D.F.; Banerjee, G.; Ricker, R.E.; Jones, S.; Eastman, J.A.; Baugher, E.; Chandrasekhar, M.

    1994-06-01

    We discuss a ``gentle`` electrochemical technique for fabricating quasi-periodic quantum dot arrays. The technique exploits a self-organizing phenomenon to produce quasi-periodic arrangement of dots and provides excellent control over dot size and interdot spacing. Unlike conventional nanolithography, it does not cause radiation damage to the structures during exposure to pattern delineating beams (e-beam, ion-beam or x-ray). Moreover, it does not require harsh processing steps like reactive ion etching, offers a minimum feature size of {approximately}40 {angstrom}, allows the fabrication of structures on nonplanar surfaces (e.g. spherical or cylindrical substrates), is amenable to mass production (millions of wafers can be processed simultaneously) and is potentially orders of magnitude cheaper than conventional nanofabrication. In this paper, we describe our initial results and show the promise of this technique for low-cost and high-yield nanosynthesis.

  14. Out-of-Equilibrium Kondo Effect in Double Quantum Dots

    SciTech Connect (OSTI)

    Aguado, Ramon; Langreth, David C.

    2000-08-28

    The out-of-equilibrium transport properties of a double quantum dot system in the Kondo regime are studied theoretically by means of a two-impurity Anderson Hamiltonian with interimpurity hopping. The Hamiltonian is solved by means of a nonequilibrium generalization of the slave-boson mean-field theory. It is demonstrated that measurements of the differential conductance dI/dV , for appropriate values of voltages and tunneling couplings, can give a direct observation of the coherent superposition between the many-body Kondo states of each dot. For large voltages and arbitrarily large interdot tunneling, there is a critical voltage above which the physical behavior of the system again resembles that of two decoupled quantum dots. (c) 2000 The American Physical Society.

  15. Operational guidance for using DOT-6M/2R packaging

    SciTech Connect (OSTI)

    Kelly, D.L.; Hummer, J.H.

    1994-03-01

    The purpose of this paper is to describe a new US Department of Energy (DOE), Transportation Management Division task to create a US Department of Transportation (DOT) Specification 6M/2R packaging configuration user`s guide. The need for a user`s guide was identified because the DOT-6M/2R packaging configuration is widely used by DOE site contractors, and DOE receives many questions about the approved packaging configurations. Currently, two DOE organizations have the authority to approve new DOT-6M/2R configurations. For Defense Programs, the Transportation and Packaging Safety Division (EH-332) administers the program. For Environmental Restoration and Waste Management, the Transportation Management Division (EM-261) administers the program.

  16. A prototype silicon double quantum dot with dispersive microwave readout

    SciTech Connect (OSTI)

    Schmidt, A. R. Henry, E.; Namaan, O.; Siddiqi, I.; Lo, C. C.; Wang, Y.-T.; Bokor, J.; Yablonovitch, E.; Li, H.; Greenman, L.; Whaley, K. B.; Schenkel, T.

    2014-07-28

    We present a unique design and fabrication process for a lateral, gate-confined double quantum dot in an accumulation mode metal-oxide-semiconductor (MOS) structure coupled to an integrated microwave resonator. All electrostatic gates for the double quantum dot are contained in a single metal layer, and use of the MOS structure allows for control of the location of the two-dimensional electron gas via the location of the accumulation gates. Numerical simulations of the electrostatic confinement potential are performed along with an estimate of the coupling of the double quantum dot to the microwave resonator. Prototype devices are fabricated and characterized by transport measurements of electron confinement and reflectometry measurements of the microwave resonator.

  17. Analysis of the efficiency of intermediate band solar cells based on quantum dot supercrystals

    SciTech Connect (OSTI)

    Heshmati, S; Golmohammadi, S; Abedi, K; Taleb, H

    2014-03-28

    We have studied the influence of the quantum-dot (QD) width and the quantum-dot conduction band (QD-CB) offset on the efficiency of quantum-dot intermediate band solar cells (QD-IBSCs). Simulation results demonstrate that with increasing QD-CB offset and decreasing QD width, the maximum efficiency is achieved. (laser applications and other topics in quantum electronics)

  18. Self-organized formation of quantum dots of a material on a substrate

    DOE Patents [OSTI]

    Zhang, Zhenyu; Wendelken, John F.; Chang, Ming-Che; Pai, Woei Wu

    2001-01-01

    Systems and methods are described for fabricating arrays of quantum dots. A method for making a quantum dot device, includes: forming clusters of atoms on a substrate; and charging the clusters of atoms such that the clusters of atoms repel one another. The systems and methods provide advantages because the quantum dots can be ordered with regard to spacing and/or size.

  19. Quantum-dot based nanothermometry in optical plasmonic recording media

    SciTech Connect (OSTI)

    Maestro, Laura Martinez; Zhang, Qiming; Li, Xiangping; Gu, Min; Jaque, Daniel

    2014-11-03

    We report on the direct experimental determination of the temperature increment caused by laser irradiation in a optical recording media constituted by a polymeric film in which gold nanorods have been incorporated. The incorporation of CdSe quantum dots in the recording media allowed for single beam thermal reading of the on-focus temperature from a simple analysis of the two-photon excited fluorescence of quantum dots. Experimental results have been compared with numerical simulations revealing an excellent agreement and opening a promising avenue for further understanding and optimization of optical writing processes and media.

  20. Optical control of the emission direction of a quantum dot

    SciTech Connect (OSTI)

    Luxmoore, I. J.; Wasley, N. A.; Fox, A. M.; Skolnick, M. S.; Ramsay, A. J.; Thijssen, A. C. T.; Oulton, R.; Hugues, M.; CNRS-CRHEA, rue Bernard Grgory, 06560 Valbonne

    2013-12-09

    Using the helicity of a non-resonant excitation laser, control over the emission direction of an InAs/GaAs quantum dot is demonstrated. The quantum dot is located off-center in a crossed-waveguide structure, such that photons of opposite circular polarization are emitted into opposite waveguide directions. By preferentially exciting spin-polarized excitons, the direction of emission can therefore be controlled. The directional control is quantified by using the ratio of the intensity of the light coupled into the two waveguides, which reaches a maximum of 35%.

  1. Visualization Dot Com (Journal Article) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Visualization Dot Com Citation Details In-Document Search Title: Visualization Dot Com In this article, we explore the seemingly well-worn subject of distance-based, or remote visualization. Current practices in remote visualization tend to clump into two broad categories. One approach, which we'll call render-remote, is to render an image remotely, then transmit the data to the user. Another option, render-local, transfers raw data to the user, where it is then visualized and rendered on the

  2. Increased InAs quantum dot size and density using bismuth as a surfactant

    SciTech Connect (OSTI)

    Dasika, Vaishno D.; Krivoy, E. M.; Nair, H. P.; Maddox, S. J.; Park, K. W.; Yu, E. T.; Bank, S. R.; Jung, D.; Lee, M. L.

    2014-12-22

    We have investigated the growth of self-assembled InAs quantum dots using bismuth as a surfactant to control the dot size and density. We find that the bismuth surfactant increases the quantum dot density, size, and uniformity, enabling the extension of the emission wavelength with increasing InAs deposition without a concomitant reduction in dot density. We show that these effects are due to bismuth acting as a reactive surfactant to kinetically suppress the surface adatom mobility. This mechanism for controlling quantum dot density and size has the potential to extend the operating wavelength and enhance the performance of various optoelectronic devices.

  3. Structure of droplet-epitaxy-grown InAs/GaAs quantum dots

    SciTech Connect (OSTI)

    Cohen, Eyal; Yochelis, Shira; Westreich, Ohad; Shusterman, Sergey; Kumah, Divine P.; Clarke, Roy; Yacoby, Yizhak; Paltiel, Yossi

    2011-09-06

    We have used a direct x-ray phasing method, coherent Bragg rod analysis, to obtain sub-angstrom resolution electron density maps of the InAs/GaAs dot system. The dots were grown by the droplet heteroepitaxy (DHE) technique and their structural and compositional properties are compared with those of dots grown by the strain-driven Stranski-Krastanov method. Our results show that the Ga diffusion into the DHE-grown dots is somewhat larger; however, other characteristics such as the composition of the dots uppermost layers, the interlayer spacing, and the bowing of the atomic layers are similar.

  4. Intermediate-band photosensitive device with quantum dots having tunneling barrier embedded in organic matrix

    DOE Patents [OSTI]

    Forrest, Stephen R.

    2008-08-19

    A plurality of quantum dots each have a shell. The quantum dots are embedded in an organic matrix. At least the quantum dots and the organic matrix are photoconductive semiconductors. The shell of each quantum dot is arranged as a tunneling barrier to require a charge carrier (an electron or a hole) at a base of the tunneling barrier in the organic matrix to perform quantum mechanical tunneling to reach the respective quantum dot. A first quantum state in each quantum dot is between a lowest unoccupied molecular orbital (LUMO) and a highest occupied molecular orbital (HOMO) of the organic matrix. Wave functions of the first quantum state of the plurality of quantum dots may overlap to form an intermediate band.

  5. Approaches to Future Generation Photovoltaics and Solar Fuels: Quantum Dots, Arrays, and Quantum Dot Solar Cells

    SciTech Connect (OSTI)

    Semonin, O.; Luther, J.; Beard, M.; Johnson, J.; Gao, J.; Nozik, A.

    2012-01-01

    One potential, long-term approach to more efficient and lower cost future generation solar cells for solar electricity and solar fuels is to utilize the unique properties of quantum dots (QDs) to control the relaxation pathways of excited states to enhance multiple exciton generation (MEG). We have studied MEG in close-packed PbSe QD arrays where the QDs are electronically coupled in the films and thus exhibit good transport while still maintaining quantization and MEG. We have developed simple, all-inorganic solution-processable QD solar cells that produce large short-circuit photocurrents and power conversion efficiencies above 5% via nanocrystalline p-n junctions. These solar cells show QYs for photocurrent that exceed 100% in the photon energy regions where MEG is possible; the photocurrent MEG QYs as a function of photon energy match those determined via time-resolved spectroscopy Recent analyses of the major effect of MEG combined with solar concentration on the conversion efficiency of solar cells will also be discussed.

  6. Simulation of quantum dots size and spacing effect for intermediate band solar cell application based on InAs quantum dots arrangement in GaAs

    SciTech Connect (OSTI)

    Hendra, P. I. B. Rahayu, F. Darma, Y.

    2014-03-24

    Intermediate band solar cell (IBSC) has become a promising technology in increasing solar cell efficiency. In this work we compare absorption coefficient profile between InAs quantum dots with GaAs bulk. We calculate the efficiency of GaAs bulk and GaAs doped with 2, 5, and 10 nm InAs quantum dot. Effective distances in quantum dot arrangement based on electron tunneling consideration were also calculated. We presented a simple calculation method with low computing power demand. Results showed that arrangement of quantum dot InAs in GaAs can increase solar cell efficiency from 23.9 % initially up to 60.4%. The effective distance between two quantum dots was found 2 nm in order to give adequate distance to prevent electron tunneling and wave functions overlap.

  7. Harry S. Truman - Hanford Site

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

    of 1945, the United States was still fighting in World War II against the nation of Japan. Having been told about the successful Trinity Test of an atomic bomb, President...

  8. Facile synthesis and photoluminescence mechanism of graphene quantum dots

    SciTech Connect (OSTI)

    Yang, Ping; Zhou, Ligang; Zhang, Shenli; Pan, Wei Shen, Wenzhong; Wan, Neng

    2014-12-28

    We report a facile hydrothermal synthesis of intrinsic fluorescent graphene quantum dots (GQDs) with two-dimensional morphology. This synthesis uses glucose, concentrate sulfuric acid, and deionized water as reagents. Concentrated sulfuric acid is found to play a key role in controlling the transformation of as-prepared hydrothermal products from amorphous carbon nanodots to well-crystallized GQDs. These GQDs show typical absorption characteristic for graphene, and have nearly excitation-independent ultraviolet and blue intrinsic emissions. Temperature-dependent PL measurements have demonstrated strong electron-electron scattering and electron-phonon interactions, suggesting a similar temperature behavior of GQDs to inorganic semiconductor quantum dots. According to optical studies, the ultraviolet emission is found to originate from the recombination of electron-hole pairs localized in the C=C bonds, while the blue emission is from the electron transition of sp{sup 2} domains.

  9. Resonant scattering of surface plasmon polaritons by dressed quantum dots

    SciTech Connect (OSTI)

    Huang, Danhong; Cardimona, Dave; Easter, Michelle; Gumbs, Godfrey; Maradudin, A. A.; Lin, Shawn-Yu; Zhang, Xiang

    2014-06-23

    The resonant scattering of surface plasmon-polariton waves (SPP) by embedded semiconductor quantum dots above the dielectric/metal interface is explored in the strong-coupling regime. In contrast to non-resonant scattering by a localized dielectric surface defect, a strong resonant peak in the spectrum of the scattered field is predicted that is accompanied by two side valleys. The peak height depends nonlinearly on the amplitude of SPP waves, reflecting the feedback dynamics from a photon-dressed electron-hole plasma inside the quantum dots. This unique behavior in the scattered field peak strength is correlated with the occurrence of a resonant dip in the absorption spectrum of SPP waves due to the interband photon-dressing effect. Our result on the scattering of SPP waves may be experimentally observable and applied to spatially selective illumination and imaging of individual molecules.

  10. Optical, electronic, and structural properties of uncoupled and close-packed arrays of InP quantum dots

    SciTech Connect (OSTI)

    Micic, O.I.; Jones, K.M.; Cahill, A.; Nozik, A.J.

    1998-12-03

    Solid films consisting of close-packed arrays of InP quantum dots have been prepared by slowly evaporating colloidal solutions of InP quantum dots. The diameters of the quantum dots were controlled to be between about 30 to 60 {angstrom}; size-selective precipitation yielded a size distribution of about 10% about the mean diameter. The arrays show regions of hexagonal order, as well as disordered regions. Oxide layers can form irreversibly on the quantum dot surface and limit the effectiveness of the size-selective precipitation. Photoluminescence spectra obtained from close-packed films of InP quantum dots formed from quantum dots with a single mean diameter and from a mixture of two quantum dot sizes show that energy transfer occurs from the photoexcited smaller quantum dots to the larger quantum dots. The efficiency of this energy transfer process is high.

  11. Computational models for the berry phase in semiconductor quantum dots

    SciTech Connect (OSTI)

    Prabhakar, S. Melnik, R. V. N.; Sebetci, A.

    2014-10-06

    By developing a new model and its finite element implementation, we analyze the Berry phase low-dimensional semiconductor nanostructures, focusing on quantum dots (QDs). In particular, we solve the Schrdinger equation and investigate the evolution of the spin dynamics during the adiabatic transport of the QDs in the 2D plane along circular trajectory. Based on this study, we reveal that the Berry phase is highly sensitive to the Rashba and Dresselhaus spin-orbit lengths.

  12. Exploring Competing Kinetic Processes in Quantum Dots Linked to Electrode

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

    Surfaces | MIT-Harvard Center for Excitonics Competing Kinetic Processes in Quantum Dots Linked to Electrode Surfaces March 14, 2012 at 2:30pm/4-349 Mark Hybertsen Brookhaven National Laboratory, Columbia University Mark_Hybertsen001_000 Abstract: Exploiting the unique properties of nanostructured chromophores for light harvesting applications relies on the balance between competing kinetic processes including energy transfer, carrier relaxation and carrier tunneling. In the first part of

  13. QCAD simulation and optimization of semiconductor double quantum dots

    SciTech Connect (OSTI)

    Nielsen, Erik; Gao, Xujiao; Kalashnikova, Irina; Muller, Richard Partain; Salinger, Andrew Gerhard; Young, Ralph Watson

    2013-12-01

    We present the Quantum Computer Aided Design (QCAD) simulator that targets modeling quantum devices, particularly silicon double quantum dots (DQDs) developed for quantum qubits. The simulator has three di erentiating features: (i) its core contains nonlinear Poisson, e ective mass Schrodinger, and Con guration Interaction solvers that have massively parallel capability for high simulation throughput, and can be run individually or combined self-consistently for 1D/2D/3D quantum devices; (ii) the core solvers show superior convergence even at near-zero-Kelvin temperatures, which is critical for modeling quantum computing devices; (iii) it couples with an optimization engine Dakota that enables optimization of gate voltages in DQDs for multiple desired targets. The Poisson solver includes Maxwell- Boltzmann and Fermi-Dirac statistics, supports Dirichlet, Neumann, interface charge, and Robin boundary conditions, and includes the e ect of dopant incomplete ionization. The solver has shown robust nonlinear convergence even in the milli-Kelvin temperature range, and has been extensively used to quickly obtain the semiclassical electrostatic potential in DQD devices. The self-consistent Schrodinger-Poisson solver has achieved robust and monotonic convergence behavior for 1D/2D/3D quantum devices at very low temperatures by using a predictor-correct iteration scheme. The QCAD simulator enables the calculation of dot-to-gate capacitances, and comparison with experiment and between solvers. It is observed that computed capacitances are in the right ballpark when compared to experiment, and quantum con nement increases capacitance when the number of electrons is xed in a quantum dot. In addition, the coupling of QCAD with Dakota allows to rapidly identify which device layouts are more likely leading to few-electron quantum dots. Very efficient QCAD simulations on a large number of fabricated and proposed Si DQDs have made it possible to provide fast feedback for design comparison and optimization.

  14. Density functional calculation of the structural and electronic properties of germanium quantum dots

    SciTech Connect (OSTI)

    Anas, M. M.; Gopir, G.

    2015-04-24

    We apply first principles density functional computational methods to study the structures, densities of states (DOS), and higher occupied molecular orbital (HOMO) lowest unoccupied molecular orbital (LUMO) gaps of selected free-standing Ge semiconductor quantum dots up to 1.8nm. Our calculations are performed using numerical atomic orbital approach where linear combination of atomic orbital was applied. The surfaces of the quantum dots was passivized by hydrogen atoms. We find that surface passivation does affect the electronic properties associated with the changes of surface state, electron localization, and the energy gaps of germanium nanocrystals as well as the confinement of electrons inside the quantum dots (QDs). Our study shows that the energy gaps of germanium quantum dots decreases with the increasing dot diameter. The size-dependent variations of the computed HOMO-LUMO gaps in our quantum dots model were found to be consistent with the effects of quantum confinement reported in others theoretical and experimental calculation.

  15. Excited-state spectroscopy of InP quantum dots

    SciTech Connect (OSTI)

    Bertram, D.; Micic, O.I.; Nozik, A.J.

    1998-02-01

    We have measured low-temperature size-selective photoluminescence excitation spectra of high-quality InP quantum dots prepared by collodial chemistry. A set of samples with mean emission energies in the range from 1.9 to 2.2 eV was investigated. All samples have a size distribution of about 10{percent}, resulting in an inhomogeneously broadened photoluminescence lineshape. Due to the finite size distribution, spectra were collected at different detection wavelengths to reveal the energies of the excited excitonic states. The size dependence of the quantization energies of InP nanoparticles was determined by measuring photoluminescence excitation at different detection energies within one sample. Up to eight excited-state transitions in a set of seven samples were observed, as the estimated quantum dot size was scanned from 1.8 to 4.0 nm. A comparison of the observed peaks with a six-band {bold k}{center_dot}{bold p} calculation is given. In contrast to the successful interpretation in the case of CdSe, no agreement between the calculated and the observed excited-state energies is achieved. {copyright} {ital 1998} {ital The American Physical Society}

  16. Mastermind Session: Connecting the Dots Between the Real Estate Market and

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

    Residential Energy Efficiency | Department of Energy Connecting the Dots Between the Real Estate Market and Residential Energy Efficiency Mastermind Session: Connecting the Dots Between the Real Estate Market and Residential Energy Efficiency Better Buildings Residential Network Program Sustainability Series Mastermind Call: Connecting the Dots Between the Real Estate Market and Residential Energy Efficiency Featuring Host Rich Dooley, Arlington County, VA, Call Slides and Discussion

  17. Size Dependence of Two-Photon Absorption in Semiconductor Quantum Dots

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Size Dependence of Two-Photon Absorption in Semiconductor Quantum Dots Citation Details In-Document Search Title: Size Dependence of Two-Photon Absorption in Semiconductor Quantum Dots Quantum confinement plays an important role in the optical properties of semiconductor quantum dots (QDs). In this work, we combine experiment and modeling to systematically investigate the size dependence of the degenerate two-photon absorption (TPA) of below-band-gap

  18. RKKY interaction in a chirally coupled double quantum dot system (Journal

    Office of Scientific and Technical Information (OSTI)

    Article) | SciTech Connect RKKY interaction in a chirally coupled double quantum dot system Citation Details In-Document Search Title: RKKY interaction in a chirally coupled double quantum dot system The competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction is investigated in a double quantum dots system, coupled via a central open conducting region. A perpendicular magnetic field induces the formation of Landau Levels which in turn give rise to the

  19. Formation of long-range ordered quantum dots arrays in amorphous matrix by ion beam irradiation

    SciTech Connect (OSTI)

    Buljan, M.; Bogdanovic-Radovic, I.; Karlusic, M.; Desnica, U. V.; Radic, N.; Dubcek, P.; Drazic, G.; Salamon, K.; Bernstorff, S.; Holy, V.

    2009-08-10

    We demonstrate the production of a well ordered three-dimensional array of Ge quantum dots in amorphous silica matrix. The ordering is achieved by ion beam irradiation and annealing of a multilayer film. Structural analysis shows that quantum dots nucleate along the direction of the ion beam used for irradiation, while the mutual distance of the quantum dots is determined by the diffusion properties of the multilayer material rather than the distances between traces of ions that are used for irradiation.

  20. The impact of disorder on charge transport in three dimensional quantum dot

    Office of Scientific and Technical Information (OSTI)

    resonant tunneling structures (Journal Article) | SciTech Connect The impact of disorder on charge transport in three dimensional quantum dot resonant tunneling structures Citation Details In-Document Search Title: The impact of disorder on charge transport in three dimensional quantum dot resonant tunneling structures Efficient iso-entropic energy filtering of electronic waves can be realized through nanostructures with three dimensional confinement, such as quantum dot resonant tunneling

  1. NREL Certifies First All-Quantum-Dot Photovoltaic Cell; Demonstrates Stability, Performance (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-02-01

    Researchers at the National Renewable Energy Laboratory (NREL) have certified the first all-quantum-dot photovoltaic cell, which was based on lead sulfide and demonstrated reasonable quantum dot solar cell performance for an initial efficiency measurement along with good stability. The certified open-circuit voltage of the quantum dot cell is greater than that possible from bulk lead sulfide because of quantum confinement.

  2. Excited-State Relaxation in PbSe Quantum Dots

    SciTech Connect (OSTI)

    An, J. M.; Califano, M.; Franceschetti, A.; Zunger, A.

    2008-01-01

    In solids the phonon-assisted, nonradiative decay from high-energy electronic excited states to low-energy electronic excited states is picosecond fast. It was hoped that electron and hole relaxation could be slowed down in quantum dots, due to the unavailability of phonons energy matched to the large energy-level spacings ('phonon-bottleneck'). However, excited-state relaxation was observed to be rather fast ({le}1 ps) in InP, CdSe, and ZnO dots, and explained by an efficient Auger mechanism, whereby the excess energy of electrons is nonradiatively transferred to holes, which can then rapidly decay by phonon emission, by virtue of the densely spaced valence-band levels. The recent emergence of PbSe as a novel quantum-dot material has rekindled the hope for a slow down of excited-state relaxation because hole relaxation was deemed to be ineffective on account of the widely spaced hole levels. The assumption of sparse hole energy levels in PbSe was based on an effective-mass argument based on the light effective mass of the hole. Surprisingly, fast intraband relaxation times of 1-7 ps were observed in PbSe quantum dots and have been considered contradictory with the Auger cooling mechanism because of the assumed sparsity of the hole energy levels. Our pseudopotential calculations, however, do not support the scenario of sparse hole levels in PbSe: Because of the existence of three valence-band maxima in the bulk PbSe band structure, hole energy levels are densely spaced, in contradiction with simple effective-mass models. The remaining question is whether the Auger decay channel is sufficiently fast to account for the fast intraband relaxation. Using the atomistic pseudopotential wave functions of Pb{sub 2046}Se{sub 2117} and Pb{sub 260}Se{sub 249} quantum dots, we explicitly calculated the electron-hole Coulomb integrals and the P {yields} S electron Auger relaxation rate. We find that the Auger mechanism can explain the experimentally observed P {yields} S intraband decay time scale without the need to invoke any exotic relaxation mechanisms.

  3. R&D Magazine: Windows into Solar Power Sources with Quantum Dots

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

    R&D Magazine: Windows into Solar Power Sources with Quantum Dots A luminescent solar concentrator is an emerging sunlight harvesting technology that has the potential to disrupt ...

  4. Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion Phosphor for LED based Solid State Lighting Citation Details In-Document Search Title: ...

  5. UltraDots Inc formely UltraPhotonics | Open Energy Information

    Open Energy Info (EERE)

    ) Place: Fremont, California Zip: CA 94539 Product: Nanotechnology company developing "quantum dot" technology for a range of energy, communications and medical applications....

  6. Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion

    Office of Scientific and Technical Information (OSTI)

    Dots as Stable and Efficient Down-Conversion Phosphor for LED based Solid State Lighting Kundu, Janardan Los Alamos National Laboratory; Ghosh, Yagnaseni Los Alamos...

  7. Cornell dots research collaboration leads to $10M cancer center > EMC2 News

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

    > The Energy Materials Center at Cornell dots research collaboration leads to $10M cancer center September 24th, 2015 › Provided/Wiesner Lab A rendering of the molecular structure of a Cornell dot, which is smaller than 10 nanometers. Provided/Wiesner Lab A transmission electron microscope image of Cornell dots. C dots, which are injected into patients, are designed to either adhere to and light up cancer cells or quickly leave the body. Cornell University, in partnership with Memorial

  8. Thick-shell nanocrystal quantum dots (Patent) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Patent: Thick-shell nanocrystal quantum dots Citation Details In-Document Search Title: Thick-shell nanocrystal quantum dots Colloidal nanocrystal quantum dots comprising an inner core having an average diameter of at least 1.5 nm and an outer shell, where said outer shell comprises multiple monolayers, wherein at least 30% of the quantum dots have an on-time fraction of 0.80 or greater under continuous excitation conditions for a period of time of at least 10 minutes. Authors: Hollingsworth,

  9. Charging dynamics of a floating gate transistor with site-controlled quantum dots

    SciTech Connect (OSTI)

    Maier, P. Hartmann, F.; Emmerling, M.; Schneider, C.; Hfling, S.; Kamp, M.; Worschech, L.

    2014-08-04

    A quantum dot memory based on a GaAs/AlGaAs quantum wire with site-controlled InAs quantum dots was realized by means of molecular beam epitaxy and etching techniques. By sampling of different gate voltage sweeps for the determination of charging and discharging thresholds, it was found that discharging takes place at short time scales of ?s, whereas several seconds of waiting times within a distinct negative gate voltage range were needed to charge the quantum dots. Such quantum dot structures have thus the potential to implement logic functions comprising charge and time dependent ingredients such as counting of signals or learning rules.

  10. Director's Final Findings and Orders, Site Treatment Plan - 10-4-95_0.pdf

    Energy Savers [EERE]

    Energy Director Dot Harris Inspires Girls at DigiGirlz Day Event Director Dot Harris Inspires Girls at DigiGirlz Day Event March 3, 2015 - 4:38pm Addthis Director Harris engages with DigiGirlz (Middle Tennessee High School students) Director Harris engages with DigiGirlz (Middle Tennessee High School students) During the 3rd Annual DigiGirlz Day event held in Nashville, TN on Saturday, February, 28, 2015, Dot Harris, Director of DOE's Office of Economic Impact and Diversity, delivered an

  11. Respond to the article | Department of Energy

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

    9:00am Use the form below to submit a question or comment to The Honorable LaDoris G. Harris about the article Today at 2:30 pm ET: Hangout With Science, Tech, and Innovation...

  12. Grazing-incidence small-angle X-ray scattering: application to the study of quantum dot lattices

    SciTech Connect (OSTI)

    Buljan, Maja Radi?, Nikola; Bernstorff, Sigrid; Drai?, Goran; Bogdanovi?-Radovi?, Iva; Hol, Vclav

    2012-01-01

    The modelling of grazing-incidence small-angle X-ray scattering (GISAXS) from three-dimensional quantum dot lattices is described. The ordering of quantum dots in three-dimensional quantum dot lattices is investigated by grazing-incidence small-angle X-ray scattering (GISAXS). Theoretical models describing GISAXS intensity distributions for three general classes of lattices of quantum dots are proposed. The classes differ in the type of disorder of the positions of the quantum dots. The models enable full structure determination, including lattice type, lattice parameters, the type and degree of disorder in the quantum dot positions and the distributions of the quantum dot sizes. Applications of the developed models are demonstrated using experimentally measured data from several types of quantum dot lattices formed by a self-assembly process.

  13. Prediction of a strain-induced conduction-band minimum in embedded quantum dots

    SciTech Connect (OSTI)

    Williamson, A.J.; Zunger, A.; Canning, A.

    1998-02-01

    Free-standing InP quantum dots have previously been theoretically and experimentally shown to have a direct band gap across a large range of experimentally accessible sizes. We demonstrated that when these dots are embedded coherently within a GaP barrier material, the effects of quantum confinement in conjunction with coherent strain suggest there will be a critical diameter of dot ({approx}60 {Angstrom}), above which the dot is direct, type I, and below which it is indirect, type II. However, the strain in the system acts to produce another conduction state with an even lower energy, in which electrons are localized in small pockets at the interface between the InP dot and the GaP barrier. Since this conduction state is GaP X{sub 1c} derived and the highest occupied valence state is InP, {Gamma} derived, the fundamental transition is predicted to be indirect in both real and reciprocal space ({open_quotes}type II{close_quotes}) for all dot sizes. This effect is peculiar to the strained dot, and is absent in the freestanding dot. {copyright} {ital 1998} {ital The American Physical Society}

  14. Probing the size and environment induced phase transformation in CdSe quantum dots

    SciTech Connect (OSTI)

    Karakoti, Ajay S.; Sanghavi, Shail P.; Nachimuthu, Ponnusamy; Yang, Ping; Thevuthasan, Suntharampillai

    2011-11-17

    The structural and electronic properties of CdSe quantum dots in toluene and drop-casted on Si wafer were investigated by in-situ micro X-ray diffraction, X-ray photoelectron spectroscopy and UV-Vis absorption and emission spectroscopy. The in-situ micro diffraction data show that the CdSe quantum dots capped with TOPO or hexadecylamine (HDA) in toluene exhibit predominantly wurtzite crystal structure, which undergoes a phase transformation to zinc blende crystal structure following drop casting on Si and this phase transition increases with decreasing the size of the CdSe quantum dots. Decreasing the size of quantum dots also increases the Se vacancies that facilitate the phase transformation. The X-ray photoelectron spectra show a systematic increase in the core level binding energies of Cd 3d and Se 3d, the band gap and the Cd/Se ratio as the size of the quantum dots decreases from 6.6nm to 2.1nm. This is attributed to the quantum confinement of CdSe crystallites by the capping ligands in toluene which increases with decreasing the size of the quantum dots. However, drop-casting quantum dots on Si alter the density and arrangement of capping ligands and solvent molecules on the quantum dots which causes significant phase transformation.

  15. Statistical theory of Coulomb blockade oscillations: Quantum chaos in quantum dots

    SciTech Connect (OSTI)

    Jalabert, R.A.; Stone, A.D.; Alhassid, Y. (Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06511 (United States))

    1992-06-08

    We develop a statistical theory of the amplitude of Coulomb blockade oscillations in semiconductor quantum dots based on the hypothesis that chaotic dynamics in the dot potential leads to behavior described by random-matrix theory. Breaking time-reversal symmetry is predicted to cause an experimentally observable change in the distribution of amplitudes. The theory is tested numerically and good agreement is found.

  16. Computational modeling of electrophotonics nanomaterials: Tunneling in double quantum dots

    SciTech Connect (OSTI)

    Vlahovic, Branislav Filikhin, Igor

    2014-10-06

    Single electron localization and tunneling in double quantum dots (DQD) and rings (DQR) and in particular the localized-delocalized states and their spectral distributions are considered in dependence on the geometry of the DQDs (DQRs). The effect of violation of symmetry of DQDs geometry on the tunneling is studied in details. The cases of regular and chaotic geometries are considered. It will be shown that a small violation of symmetry drastically affects localization of electron and that anti-crossing of the levels is the mechanism of tunneling between the localized and delocalized states in DQRs.

  17. Activation of molecular catalysts using semiconductor quantum dots

    DOE Patents [OSTI]

    Meyer, Thomas J.; Sykora, Milan; Klimov, Victor I.

    2011-10-04

    Photocatalytic materials based on coupling of semiconductor nanocrystalline quantum dots (NQD) and molecular catalysts. These materials have capability to drive or catalyze non-spontaneous chemical reactions in the presence of visible radiation, ultraviolet radiation, or both. The NQD functions in these materials as a light absorber and charge generator. Following light absorption, the NQD activates a molecular catalyst adsorbed on the surface of the NQD via transfer of one or more charges (either electrons or electron-holes) from the NQD to the molecular catalyst. The activated molecular catalyst can then drive a chemical reaction. A photoelectrolytic device that includes such photocatalytic materials is also described.

  18. Electronic structure of nanocrystal quantum-dot quantumwells

    SciTech Connect (OSTI)

    Schrier, Joshua; Wang, Lin-Wang

    2006-06-26

    The electronic states of CdS/CdSe/CdS colloidal nanocrystalquantum-dot quantum wells are studied by large-scale pseudopotentiallocal density approximation (LDA) calculations. Using this approach, wedetermine the effects of CdS core size, CdSe well thickness, and CdSshell thickness on the band-edge wave functions, band-gap, andelectron-hole Coulomb interactions. We find the conduction-band wavefunction to be less confined to the CdSe well layer than predicted by kcdot p effective-mass theory, which accounts for the previous underestimation of the electron g factor.

  19. Photocurrent extraction efficiency in colloidal quantum dot photovoltaics

    SciTech Connect (OSTI)

    Kemp, K. W.; Wong, C. T. O.; Hoogland, S. H.; Sargent, E. H.

    2013-11-18

    The efficiency of photocurrent extraction was studied directly inside operating Colloidal Quantum Dot (CQD) photovoltaic devices. A model was derived from first principles for a thin film p-n junction with a linearly spatially dependent electric field. Using this model, we were able to clarify the origins of recent improvement in CQD solar cell performance. From current-voltage diode characteristics under 1 sun conditions, we extracted transport lengths ranging from 39 nm to 86 nm for these materials. Characterization of the intensity dependence of photocurrent extraction revealed that the dominant loss mechanism limiting the transport length is trap-mediated recombination.

  20. Photoluminescence-enhanced biocompatible quantum dots by phospholipid functionalization

    SciTech Connect (OSTI)

    Shi Yunfeng; He Peng Zhu Xinyuan

    2008-10-02

    A simple two-step strategy using phospholipid (PPL) to functionalize core/shell CdSe/ZnS quantum dots (QDs) has been described. The experimental data show that the use of S-H terminated PPL results not only in the high colloidal stability of core/shell CdSe/ZnS QDs in the aqueous phase, but also in the significant enhancement of photoluminescence. The degree of the enhancement is a function of the PPL-CdSe/ZnS QDs sample concentration. These results might be promising for future biological platform in new devices ranging from photovoltaic cells to biosensors and other devices.

  1. The dosimetric consequences of the new DOT LSA definition

    SciTech Connect (OSTI)

    Mis, F.J.

    1996-10-01

    As a result of the new regulations for the transportation of radioactive materials, the DOT and the NRC have implemented a rule designed to limit the activity in an LSA container. This is a new regulation designed to insure that the spirit of the law as well as the letter of the law are followed for LSA shipments. Specifically, it limits the dose rate at any location on an unshielded LSA container to less than 1 rem/hr at 3 meters. Other possible alternatives had been discussed prior to the implementation of this regulation including multiples of A{sub 2} values, as implemented by the French.

  2. Water-soluble luminescent quantum dots and biomolecular conjugates thereof and related compositions and methods of use

    DOE Patents [OSTI]

    Nie, Shuming; Chan, Warren C. W.; Emory, Stephen

    2007-03-20

    The present invention provides a water-soluble luminescent quantum dot, a biomolecular conjugate thereof and a composition comprising such a quantum dot or conjugate. Additionally, the present invention provides a method of obtaining a luminescent quantum dot, a method of making a biomolecular conjugate thereof, and methods of using a biomolecular conjugate for ultrasensitive nonisotopic detection in vitro and in vivo.

  3. Water-soluble luminescent quantum dots and biomolecular conjugates thereof and related compositions and method of use

    DOE Patents [OSTI]

    Nie, Shuming; Chan, Warren C. W.; Emory, Steven R.

    2002-01-01

    The present invention provides a water-soluble luminescent quantum dot, a biomolecular conjugate thereof and a composition comprising such a quantum dot or conjugate. Additionally, the present invention provides a method of obtaining a luminescent quantum dot, a method of making a biomolecular conjugate thereof, and methods of using a biomolecular conjugate for ultrasensitive nonisotopic detection in vitro and in vivo.

  4. Charge-transfer dynamics in multilayered PbS and PbSe quantum dot architectures

    SciTech Connect (OSTI)

    Xu, F.; Ma, X.; Haughn, C. R.; Doty, M. F.; Cloutier, S. G.

    2014-02-03

    We demonstrate control of the charge transfer process in PbS and PbSe quantum dot assemblies. We first demonstrate efficient charge transfer from donor quantum dots to acceptor quantum dots in a multi-layer PbSe cascade structure. Then, we assemble type-I and type-II heterostructures using both PbS and PbSe quantum dots via careful control of the band alignment. In type-I structures, photo-generated carriers are transferred and localized in the smaller bandgap (acceptor) quantum dots, resulting in a significant luminescence enhancement. In contrast, a significant luminescence quenching and shorter emission lifetime confirms an efficient separation of photo-generated carriers in the type-II architecture.

  5. Intermediate-band photosensitive device with quantum dots embedded in energy fence barrier

    DOE Patents [OSTI]

    Forrest, Stephen R.; Wei, Guodan

    2010-07-06

    A plurality of layers of a first semiconductor material and a plurality of dots-in-a-fence barriers disposed in a stack between a first electrode and a second electrode. Each dots-in-a-fence barrier consists essentially of a plurality of quantum dots of a second semiconductor material embedded between and in direct contact with two layers of a third semiconductor material. Wave functions of the quantum dots overlap as at least one intermediate band. The layers of the third semiconductor material are arranged as tunneling barriers to require a first electron and/or a first hole in a layer of the first material to perform quantum mechanical tunneling to reach the second material within a respective quantum dot, and to require a second electron and/or a second hole in a layer of the first semiconductor material to perform quantum mechanical tunneling to reach another layer of the first semiconductor material.

  6. Engineering the hole confinement for CdTe-based quantum dot molecules

    SciTech Connect (OSTI)

    Kłopotowski, Ł. Wojnar, P.; Kret, S.; Fronc, K.; Wojtowicz, T.; Karczewski, G.

    2015-06-14

    We demonstrate an efficient method to engineer the quantum confinement in a system of two quantum dots grown in a vertical stack. We achieve this by using materials with a different lattice constant for the growth of the outer and inner barriers. We monitor the resulting dot morphology with transmission electron microscopy studies and correlate the results with ensemble quantum dot photoluminescence. Furthermore, we embed the double quantum dots into diode structures and study photoluminescence as a function of bias voltage. We show that in properly engineered structures, it is possible to achieve a resonance of the hole states by tuning the energy levels with electric field. At the resonance, we observe signatures of a formation of a molecular state, hybridized over the two dots.

  7. Induced spin-accumulation and spin-polarization in a quantum-dot ring by using magnetic quantum dots and Rashba spin-orbit effect

    SciTech Connect (OSTI)

    Eslami, L., E-mail: Leslami@iust.ac.ir; Faizabadi, E. [School of Physics, Iran University of Science and Technology, Tehran 16846 (Iran, Islamic Republic of)

    2014-05-28

    The effect of magnetic contacts on spin-dependent electron transport and spin-accumulation in a quantum ring, which is threaded by a magnetic flux, is studied. The quantum ring is made up of four quantum dots, where two of them possess magnetic structure and other ones are subjected to the Rashba spin-orbit coupling. The magnetic quantum dots, referred to as magnetic quantum contacts, are connected to two external leads. Two different configurations of magnetic moments of the quantum contacts are considered; the parallel and the anti-parallel ones. When the magnetic moments are parallel, the degeneracy between the transmission coefficients of spin-up and spin-down electrons is lifted and the system can be adjusted to operate as a spin-filter. In addition, the accumulation of spin-up and spin-down electrons in non-magnetic quantum dots are different in the case of parallel magnetic moments. When the intra-dot Coulomb interaction is taken into account, we find that the electron interactions participate in separation between the accumulations of electrons with different spin directions in non-magnetic quantum dots. Furthermore, the spin-accumulation in non-magnetic quantum dots can be tuned in the both parallel and anti-parallel magnetic moments by adjusting the Rashba spin-orbit strength and the magnetic flux. Thus, the quantum ring with magnetic quantum contacts could be utilized to create tunable local magnetic moments which can be used in designing optimized nanodevices.

  8. EM Convenes Historic Meeting with Leaders of Tribal Nations ...

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

    ... of Economic Impact and Diversity Director Dot Harris were among the speakers at the event. ... this week recognizing contributions of Native Americans. EM's Top Official Underscores ...

  9. Native American Students in STEM Fields: A Critical Need for our Country

    Broader source: Energy.gov [DOE]

    The Office of Economic Impact and Diversity's Dot Harris recently met with youth from Tribal Nations around the U.S. to discuss the benefits of STEM education.

  10. DOE Celebrates LGBT Pride Month | National Nuclear Security Administra...

    National Nuclear Security Administration (NNSA)

    Elizabeth Sherwood-Randall; Dot Harris, Director, DOE Office of Economic Impact and Diversity; and Russell Ames, DOE Globe President and Program Analyst for DOE Office of Science. ...

  11. Mickey Leland Energy Fellowship Seeking Underrepresented Students...

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

    Director Dot Harris (second from left) were Marlene Kaplan, the Deputy Director of Education and director of EPP, National Oceanic and Atmospheric Administration, Claudia...

  12. Applications are Open for YOU to Join the 2013 Class of the Minority...

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

    Director Dot Harris (second from left) were Marlene Kaplan, the Deputy Director of Education and director of EPP, National Oceanic and Atmospheric Administration, Claudia...

  13. Who's Involved | Department of Energy

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

    2014 DOE CFC Campaign Leadership Chair Ernest Moniz, Secretary of Energy Vice Chair Dot Harris, Director, Office of Economic Impact and Diversity Champion David M. Klaus, Deputy...

  14. Upholding Dr. King's Dream and Inspiring the Next Generation...

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

    The kids were also able to meet science, technology, engineering and math professionals who volunteered their time to engage more students in STEM fields. Director Dot Harris, who ...

  15. Colloidal quantum dot solar cells on curved and flexible substrates

    SciTech Connect (OSTI)

    Kramer, Illan J.; Moreno-Bautista, Gabriel; Minor, James C.; Kopilovic, Damir; Sargent, Edward H.

    2014-10-20

    Colloidal quantum dots (CQDs) are semiconductor nanocrystals synthesized with, processed in, and deposited from the solution phase, potentially enabling low-cost, facile manufacture of solar cells. Unfortunately, CQD solar cell reports, until now, have only explored batch-processing methods—such as spin-coating—that offer limited capacity for scaling. Spray-coating could offer a means of producing uniform colloidal quantum dot films that yield high-quality devices. Here, we explore the versatility of the spray-coating method by producing CQD solar cells in a variety of previously unexplored substrate arrangements. The potential transferability of the spray-coating method to a roll-to-roll manufacturing process was tested by spray-coating the CQD active layer onto six substrates mounted on a rapidly rotating drum, yielding devices with an average power conversion efficiency of 6.7%. We further tested the manufacturability of the process by endeavoring to spray onto flexible substrates, only to find that spraying while the substrate was flexed was crucial to achieving champion performance of 7.2% without compromise to open-circuit voltage. Having deposited onto a substrate with one axis of curvature, we then built our CQD solar cells onto a spherical lens substrate having two axes of curvature resulting in a 5% efficient device. These results show that CQDs deposited using our spraying method can be integrated to large-area manufacturing processes and can be used to make solar cells on unconventional shapes.

  16. Effect of swift heavy ion irradiation on bare and coated ZnS quantum dots

    SciTech Connect (OSTI)

    Chowdhury, S. Hussain, A.M.P.; Ahmed, G.A.; Singh, F.; Avasthi, D.K.; Choudhury, A.

    2008-12-01

    The present study compares structural and optical modifications of bare and silica (SiO{sub 2}) coated ZnS quantum dots under swift heavy ion (SHI) irradiation. Bare and silica coated ZnS quantum dots were prepared following an inexpensive chemical route using polyvinyl alcohol (PVA) as the dielectric host matrix. X-ray diffraction (XRD) and transmission electron microscopy (TEM) study of the samples show the formation of almost spherical ZnS quantum dots. The UV-Vis absorption spectra reveal blue shift relative to bulk material in absorption energy while photoluminescence (PL) spectra suggests that surface state and near band edge emissions are dominating in case of bare and coated samples, respectively. Swift heavy ion irradiation of the samples was carried out with 160 MeV Ni{sup 12+} ion beam with fluences 10{sup 12} to 10{sup 13} ions/cm{sup 2}. Size enhancement of bare quantum dots after irradiation has been indicated in XRD and TEM analysis of the samples which has also been supported by optical absorption spectra. However similar investigations on irradiated coated quantum dots revealed little change in quantum dot size and emission. The present study thus shows that the coated ZnS quantum dots are stable upon SHI irradiation compared to the bare one.

  17. Tuning the properties of Ge-quantum dots superlattices in amorphous silica matrix through deposition conditions

    SciTech Connect (OSTI)

    Pinto, S. R. C.; Ramos, M. M. D.; Gomes, M. J. M.; Buljan, M.; Chahboun, A.; Roldan, M. A.; Molina, S. I.; Bernstorff, S.; Varela, M.; Pennycook, S. J.; Barradas, N. P.; Alves, E.

    2012-04-01

    In this work, we investigate the structural properties of Ge quantum dot lattices in amorphous silica matrix, prepared by low-temperature magnetron sputtering deposition of (Ge+SiO{sub 2})/SiO{sub 2} multilayers. The dependence of quantum dot shape, size, separation, and arrangement type on the Ge-rich (Ge + SiO{sub 2}) layer thickness is studied. We show that the quantum dots are elongated along the growth direction, perpendicular to the multilayer surface. The size of the quantum dots and their separation along the growth direction can be tuned by changing the Ge-rich layer thickness. The average value of the quantum dots size along the lateral (in-plane) direction along with their lateral separation is not affected by the thickness of the Ge-rich layer. However, the thickness of the Ge-rich layer significantly affects the quantum dot ordering. In addition, we investigate the dependence of the multilayer average atomic composition and also the quantum dot crystalline quality on the deposition parameters.

  18. Enhanced single photon emission from positioned InP/GaInP quantum dots

    Office of Scientific and Technical Information (OSTI)

    coupled to a confined Tamm-plasmon mode (Journal Article) | SciTech Connect Enhanced single photon emission from positioned InP/GaInP quantum dots coupled to a confined Tamm-plasmon mode Citation Details In-Document Search Title: Enhanced single photon emission from positioned InP/GaInP quantum dots coupled to a confined Tamm-plasmon mode We report on the enhancement of the spontaneous emission in the visible red spectral range from site-controlled InP/GaInP quantum dots by resonant coupling

  19. Red light-emitting diodes based on InP/GaP quantum dots

    SciTech Connect (OSTI)

    Hatami, F.; Lordi, V.; Harris, J.S.; Kostial, H.; Masselink, W.T.

    2005-05-01

    The growth, fabrication, and device characterization of InP quantum-dot light-emitting diodes based on GaP are described and discussed. The diode structures are grown on gallium phosphide substrates using gas-source molecular-beam epitaxy and the active region of the diode consists of self-assembled InP quantum dots embedded in a GaP matrix. Red electroluminescence originating from direct band-gap emission from the InP quantum dots is observed at low temperatures.With increasing temperature, however, the emission line shifts to the longer wavelength. The emission light is measured to above room temperature.

  20. Far off-resonant coupling between photonic crystal microcavity and single quantum dot with resonant excitation

    SciTech Connect (OSTI)

    Banihashemi, Mehdi; Ahmadi, Vahid, E-mail: v-ahmadi@modares.ac.ir [Department of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, P.O. Box 14115-194 (Iran, Islamic Republic of)] [Department of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, P.O. Box 14115-194 (Iran, Islamic Republic of); Nakamura, Tatsuya; Kojima, Takanori; Kojima, Kazunobu; Noda, Susumu [Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan)] [Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan)

    2013-12-16

    In this paper, we experimentally demonstrate that with sub-nanowatt coherent s-shell excitation of a single InAs quantum dot, off-resonant coupling of 4.1?nm is possible between L3 photonic crystal microcavity and the quantum dot at 50?K. This resonant excitation reduces strongly the effect of surrounding charges to quantum dot, multiexciton complexes and pure dephasing. It seems that this far off-resonant coupling is the result of increased number of acoustical phonons due to high operating temperature of 50?K. The 4.1?nm detuning is the largest amount for this kind of coupling.

  1. R&D Magazine: Windows into Solar Power Sources with Quantum Dots

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

    R&D Magazine: Windows into Solar Power Sources with Quantum Dots R&D Magazine: Windows into Solar Power Sources with Quantum Dots A luminescent solar concentrator is an emerging sunlight harvesting technology that has the potential to disrupt the way we think about energy: It could turn any window into a daytime power source. August 30, 2015 R&D Magazine: Windows into Solar Power Sources with Quantum Dots A luminescent solar concentrator is an emerging sunlight harvesting technology

  2. Direct Observation of Energy-Gap Scaling Law in CdSe Quantum Dots with Positrons

    SciTech Connect (OSTI)

    Denison, Arthur Blanchard; Weber, M. H.; Lynn, K. G.; Barbiellini, B.; Sterne, P. A.

    2002-07-01

    CdSe quantum dot samples with sizes in the range of 1.8~6 nm in diameter were examined by positron annihilation spectroscopy. The results were compared to data obtained for single-crystal bulk CdSe. Evidence is provided that the positrons annihilate within the nanospheres. The annihilation line shape shows a smearing at the boundary of the Jones zone proportional to the widening of the band gap due to a reduction in the size of the quantum dots. The data confirm that the change in the band gap is inversely proportional to the square of the quantum dot diameter.

  3. The use of bulk states to accelerate the band edge statecalculation of a semiconductor quantum dot

    SciTech Connect (OSTI)

    Vomel, Christof; Tomov, Stanimire Z.; Wang, Lin-Wang; Marques,Osni A.; Dongarra, Jack J.

    2006-05-10

    We present a new technique to accelerate the convergence of the folded spectrum method in empirical pseudopotential band edge state calculations for colloidal quantum dots. We use bulk band states of the materials constituent of the quantum dot to construct initial vectors and a preconditioner. We apply these to accelerate the convergence of the folded spectrum method for the interior states at the top of the valence and the bottom of the conduction band. For large CdSe quantum dots, the number of iteration steps until convergence decreases by about a factor of 4 compared to previous calculations.

  4. R&D Magazine: Windows into Solar Power Sources with Quantum Dots

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

    R&D Magazine: Windows into Solar Power Sources with Quantum Dots August 30, 2015 R&D Magazine: Windows into Solar Power Sources with Quantum Dots A luminescent solar concentrator is an emerging sunlight harvesting technology that has the potential to disrupt the way we think about energy: It could turn any window into a daytime power source. "In these devices, a fraction of light transmitted through the window is absorbed by nano-sized particles (semiconductor quantum dots)

  5. On-chip generation and guiding of quantum light from a site-controlled quantum dot

    SciTech Connect (OSTI)

    Jamil, Ayesha; Farrer, Ian; Griffiths, Jonathan P.; Jones, Geb A. C.; Ritchie, David A.; Skiba-Szymanska, Joanna; Kalliakos, Sokratis; Ward, Martin B.; Ellis, David J. P.; Shields, Andrew J.; Schwagmann, Andre; Brody, Yarden; Cambridge Research Laboratory, Toshiba Research Europe Limited, 208 Science Park, Milton Road, Cambridge, CB4 0GZ

    2014-03-10

    We demonstrate the emission and routing of single photons along a semiconductor chip originating from carrier recombination in an actively positioned InAs quantum dot. Devicescale arrays of quantum dots are formed by a twostep regrowth process. We precisely locate the propagating region of a unidirectional photonic crystal waveguide with respect to the quantum dot nucleation site. Under pulsed optical excitation, the multiphoton emission probability from the waveguide's exit is 12%??5% before any background correction. Our results are a major step towards the deterministic integration of a quantum emitter with the waveguiding components of photonic quantum circuits.

  6. Synthesis of Non-blinking Semiconductor Quantum Dots Emitting in the

    Office of Scientific and Technical Information (OSTI)

    Near-Infrared (Conference) | SciTech Connect Synthesis of Non-blinking Semiconductor Quantum Dots Emitting in the Near-Infrared Citation Details In-Document Search Title: Synthesis of Non-blinking Semiconductor Quantum Dots Emitting in the Near-Infrared Our previous work demonstrates that Quasi-Type II CdSe/CdS core-shell quantum dots with thick shells (3-5 nm) exhibit unique photophysical characteristics, including improved chemical robustness over typical thin-shelled core/shell systems

  7. Quantum Dot Solar Cells with Multiple Exciton Generation

    SciTech Connect (OSTI)

    Hanna, M. C.; Beard, M. C.; Johnson, J. C.; Murphy, J.; Ellingson, R. J.; Nozik, A. J.

    2005-11-01

    We have measured the quantum yield of the multiple exciton generation (MEG) process in quantum dots (QDs) of the lead-salt semiconductor family (PbSe, PbTe, and PbS) using fs pump-probe transient absorption measurements. Very high quantum yields (up to 300%) for charge carrier generation from MEG have been measured in all of the Pb-VI QDs. We have calculated the potential maximum performance of various MEG QD solar cells in the detailed balance limit. We examined a two-cell tandem PV device with singlet fission (SF), QD, and normal dye (N) absorbers in the nine possible series-connected combinations to compare the tandem combinations and identify the combinations with the highest theoretical efficiency. We also calculated the maximum efficiency of an idealized single-gap MEG QD solar cell with M multiplications and its performance under solar concentration.

  8. Location deterministic biosensing from quantum-dot-nanowire assemblies

    SciTech Connect (OSTI)

    Liu, Chao; Kim, Kwanoh; Fan, D. L.

    2014-08-25

    Semiconductor quantum dots (QDs) with high fluorescent brightness, stability, and tunable sizes, have received considerable interest for imaging, sensing, and delivery of biomolecules. In this research, we demonstrate location deterministic biochemical detection from arrays of QD-nanowire hybrid assemblies. QDs with diameters less than 10 nm are manipulated and precisely positioned on the tips of the assembled Gold (Au) nanowires. The manipulation mechanisms are quantitatively understood as the synergetic effects of dielectrophoretic (DEP) and alternating current electroosmosis (ACEO) due to AC electric fields. The QD-nanowire hybrid sensors operate uniquely by concentrating bioanalytes to QDs on the tips of nanowires before detection, offering much enhanced efficiency and sensitivity, in addition to the position-predictable rationality. This research could result in advances in QD-based biomedical detection and inspires an innovative approach for fabricating various QD-based nanodevices.

  9. Interaction of graphene quantum dots with bulk semiconductor surfaces

    SciTech Connect (OSTI)

    Mohapatra, P. K.; Singh, B. P.; Kushavah, Dushyant; Mohapatra, J.

    2015-05-15

    Highly luminescent graphene quantum dots (GQDs) are synthesized through thermolysis of glucose. The average lateral size of the synthesized GQDs is found to be ?5 nm. The occurrence of D and G band at 1345 and 1580 cm{sup ?1} in Raman spectrum confirms the presence of graphene layers. GQDs are mostly consisting of 3 to 4 graphene layers as confirmed from the AFM measurements. Photoluminescence (PL) measurement shows a distinct broadening of the spectrum when GQDs are on the semiconducting bulk surface compared to GQDs in water. The time resolved PL measurement shows a significant shortening in PL lifetime due to the substrate interaction on GQDs compared to the GQDs in solution phase.

  10. The Honorable Michael White The Honorable Michael White

    Office of Legacy Management (LM)

    Sincerely, Off-SiteSavannah River,Division Office of Eastern Area Programs Enclosures ' Office of Environmental Restoration iitch; Ihc ., Cleveland; OH' R. Owens, Ohio Bureau ...

  11. NREL: Awards and Honors - Scientific and Technical Society Honors...

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

    Kazmerski 1981 Peter Mark Memorial Research Award - Dr. Lawrence Kazmerski American Welding Society 2002 William Spraragen Memorial Certificate Award - R. D. Smith, for best...

  12. MEMORANDUM TO: Honorable Steven Chu, Secretary Honorable Patricia...

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

    The grid has shown remarkable resilience for these phenomena and other wide spread events ... improve preparedness, security, and resilience. 3) Conduct comprehensive emergency, ...

  13. MEMORANDUM TO: Honorable Steven Chu, Secretary Honorable Patricia...

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

    Electricity Advisory Committee DATE: March 10, 2011 RE: Recommendations to Address Power ... Agency (EPA) has been developing a series of proposed rules (herein, the ...

  14. Mechanism of lateral ordering of InP dots grown on InGaP layers

    SciTech Connect (OSTI)

    Bortoleto, J.R.R.; Gutierrez, H.R.; Cotta, M.A.; Bettini, J.

    2005-07-04

    The mechanisms leading to the spontaneous formation of a two-dimensional array of InP/InGaP dots grown by chemical-beam epitaxy are discussed. Samples where the InGaP buffer layer was grown at different conditions were characterized by transmission electron microscopy. Our results indicate that a periodic strain field related to lateral two-dimensional compositional modulation in the InGaP buffer layer determines the dot nucleation positions during InP growth. Although the periodic strain field in the InGaP is large enough to align the InP dots, both their shape and optical properties are effectively unaltered. This result shows that compositional modulation can be used as a tool for in situ dot positioning.

  15. TxDOT - Right of Way Forms webpage | Open Energy Information

    Open Energy Info (EERE)

    Right of Way Forms webpage Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: TxDOT - Right of Way Forms webpage Abstract This webpage provides the...

  16. Quantum Dots Promise to Significantly Boost Solar Cell Efficiencies (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-08-01

    In the search for a third generation of solar-cell technologies, a leading candidate is the use of 'quantum dots' -- tiny spheres of semiconductor material measuring only about 2-10 billionths of a meter in diameter. Quantum dots have the potential to dramatically increase the efficiency of converting sunlight into energy -- perhaps even doubling it in some devices -- because of their ability to generate more than one bound electron-hole pair, or exciton, per incoming photon. NREL has produced quantum dots using colloidal suspensions; then, using molecular self-assembly, they have been fabricated into the first-ever quantum-dot solar cells. While these devices operate with only 4.4% efficiency, they demonstrate the capability for low-cost manufacturing.

  17. Exciton dissociation and interdot transport in CdSe quantum-dot molecules

    SciTech Connect (OSTI)

    Franceschetti, Alberto; Zunger, Alex

    2001-04-15

    One of the most important parameters that determine the transport properties of a quantum dot array is the exciton dissociation energy, i.e., the energy {Delta}E required to dissociate an exciton into an electron and a hole localized in different dots. We show that a pseudopotential calculation for a dot molecule, coupled with a basic configuration interaction calculation of the exciton energy levels, provides directly the exciton dissociation energy, including the effects of wave function overlap, screened Coulomb attraction between the electron and the hole in different dots, and polarization effects. We find that {Delta}E decreases as the interdot distance decreases and as the dielectric constant of the medium increases.

  18. Theoretical study of intraband optical transitions in conduction band of dot-in-a-well system

    SciTech Connect (OSTI)

    Chaganti, Venkata R.; Apalkov, Vadym

    2014-02-15

    We study numerically absorption optical spectra of n-doped InAs/In{sub 015}Ga{sub 085}As/GaAs quantum dot-in-a-well systems. The absorption spectra are mainly determined by the size of a quantum dot and have weak dependence on the thickness of quantum well and position of the dot in a well. The dot-in-a-well system is sensitive to both in-plane and out-of-plane polarizations of the incident light with much stronger absorption intensities for the in-plane-polarized light. The absorption spectrum of in-plane-polarized light has also a multi-peak structure with two or three peaks of comparable intensities, while the absorption spectrum of out-of-plane polarized light has a single well-pronounced peak.

  19. InP quantum dots: Electronic structure, surface effects, and the redshifted emission

    SciTech Connect (OSTI)

    Fu, H.; Zunger, A.

    1997-07-01

    We present pseudopotential plane-wave electronic-structure calculations on InP quantum dots in an effort to understand quantum confinement and surface effects and to identify the origin of the long-lived and redshifted luminescence. We find that (i) unlike the case in small GaAs dots, the lowest unoccupied state of InP dots is the {Gamma}{sub 1c}-derived direct state rather than the X{sub 1c}-derived indirect state and (ii) unlike the prediction of {bold k}{center_dot}{bold p} models, the highest occupied state in InP dots has a 1sd-type envelope function rather than a (dipole-forbidden) 1pf envelope function. Thus explanations (i) and (ii) to the long-lived redshifted emission in terms of an orbitally forbidden character can be excluded. Furthermore, (iii) fully passivated InP dots have no surface states in the gap. However, (iv) removal of the anion-site passivation leads to a P dangling bond (DB) state just above the valence band, which will act as a trap for photogenerated holes. Similarly, (v) removal of the cation-site passivation leads to an In dangling-bond state below the conduction band. While the energy of the In DB state depends only weakly on quantum size, its radiative lifetime increases with quantum size. The calculated {approximately}300-meV redshift and the {approximately}18 times longer radiative lifetime relative to the dot-interior transition for the 26-{Angstrom} dot with an In DB are in good agreement with the observations of full-luminescence experiments for unetched InP dots. Yet, (vi) this type of redshift due to surface defect is inconsistent with that measured in {ital selective} excitation for HF-etched InP dots. (vii) The latter type of ({open_quotes}resonant{close_quotes}) redshift is compatible with the calculated {ital screened} singlet-triplet splitting in InP dots, suggesting that the slow emitting state seen in selective excitation could be a triplet state. {copyright} {ital 1997} {ital The American Physical Society}

  20. Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion

    Office of Scientific and Technical Information (OSTI)

    Phosphor for LED based Solid State Lighting (Technical Report) | SciTech Connect Technical Report: Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion Phosphor for LED based Solid State Lighting Citation Details In-Document Search Title: Giant Nanocrystal Quantum Dots as Stable and Efficient Down-Conversion Phosphor for LED based Solid State Lighting Authors: Kundu, Janardan [1] ; Ghosh, Yagnaseni [1] ; Dennis, Allison M. [1] ; Htoon, Han [1] ; Hollingsworth, Jennifer A

  1. InGaN Quantum Dot Fabrication using Quantum Size Controlled

    Office of Scientific and Technical Information (OSTI)

    Photoelectrochemical Etching. (Conference) | SciTech Connect InGaN Quantum Dot Fabrication using Quantum Size Controlled Photoelectrochemical Etching. Citation Details In-Document Search Title: InGaN Quantum Dot Fabrication using Quantum Size Controlled Photoelectrochemical Etching. Abstract not provided. Authors: Fischer, Arthur Joseph ; Xiao, Xiaoyin ; Lu, Ping ; Tsao, Jeffrey Yeenien ; Wang, George T. ; Koleske, Daniel ; Subramania, Ganapathi Subramanian ; Coltrin, Michael Elliott

  2. SUNY/Buffalo Developing High-Efficiency Colloidal Quantum Dot Phosphors

    Broader source: Energy.gov [DOE]

    The State University of New York at Buffalo is working to reduce the cost and increase the performance of LEDs for general illumination by developing high-efficiency colloidal quantum dot phosphors to replace conventional phosphors (i.e., those placed directly on the chip). Colloidal quantum dot phosphors are nanocrystal emitters and contain no rare-earth elements. What's more, it's possible to tune the emission wavelength merely by changing their size.

  3. Regulatory compliance guide for DOT-7A type A packaging design

    SciTech Connect (OSTI)

    Kelly, D.L.

    1996-06-04

    The purpose of this guide is to provide instruction for assuring that the regulatory design requirements for a DOT-7A Type A packaging are met. This guide also supports the testing and evaluation activities that are performed on new packaging designs by a DOE-approved test facility through the DOE`s DOT-7A Test Program. This Guide was updated to incorporate regulatory changes implemented by HM-169A (49 CFR, `Transportation`).

  4. "Giant" nanocrystal quantum dots for light-emission applications

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect "Giant" nanocrystal quantum dots for light-emission applications Citation Details In-Document Search Title: "Giant" nanocrystal quantum dots for light-emission applications Authors: Hollingsworth, Jennifer A. [1] + Show Author Affiliations Los Alamos National Laboratory Publication Date: 2013-02-15 OSTI Identifier: 1063241 Report Number(s): LA-UR-13-21028 DOE Contract Number: AC52-06NA25396 Resource Type: Conference Resource Relation:

  5. The effect of Coulomb interactions on thermoelectric properties of quantum dots

    SciTech Connect (OSTI)

    Zimbovskaya, Natalya A.

    2014-03-14

    Thermoelectric effects in a quantum dot coupled to the source and drain charge reservoirs are explored using a nonequilibrium Green's functions formalism beyond the Hartree-Fock approximation. Thermal transport is analyzed within a linear response regime. A transition from Coulomb blockade regime to Kondo regime in thermoelectric transport through a single-level quantum dot is traced using unified approximations for the relevant Green's functions.

  6. Quantum DotBridgeFullerene Heterodimers with Controlled Photoinduced Electron Transfer

    SciTech Connect (OSTI)

    Cotlet, M.; Xu, Z.

    2011-06-27

    A series of donor-bridge-acceptor systems in the form of core/shell CdSe/ZnS quantum dot-bridge-fullerene heterodimers (see picture) with varying bridge length and varying quantum dot size were self-assembled by a surface-based stepwise method to demonstrate control of the rate and of the magnitude of fluctuations of photoinduced electron transfer at the single-molecule level.

  7. Final Progress Report for Project Entitled: Quantum Dot Tracers for Use in Engineered Geothermal Systems

    SciTech Connect (OSTI)

    Rose, Peter; Bartl, Michael; Reimus, Paul; Williams, Mark; Mella, Mike

    2015-09-12

    The objective of this project was to develop and demonstrate a new class of tracers that offer great promise for use in characterizing fracture networks in EGS reservoirs. From laboratory synthesis and testing through numerical modeling and field demonstrations, we have demonstrated the amazing versatility and applicability of quantum dot tracers. This report summarizes the results of four years of research into the design, synthesis, and characterization of semiconductor nanocrystals (quantum dots) for use as geothermal tracers.

  8. Approaches to Future Generation Photovoltaics and Solar Fuels: Multiple Exciton Generation in Quantum Dots, Quantum Dot Arrays, Molecular Singlet Fission, and Quantum Dot Solar Cells

    SciTech Connect (OSTI)

    Nozik, A. J.; Beard, M. C.; Johnson, J. C.; Hanna, M. C.; Luther, J. M.; Midgett, A.; Semonin, O.; Michel, J.

    2012-01-01

    One potential, long-term approach to more efficient future generation solar cells is to utilize the unique properties of quantum dots (QDs) and unique molecular chromophores to control the relaxation pathways of excited states to produce enhanced conversion efficiency through efficient multiple electron-hole pair generation from single photons . We have observed efficient multiple exciton generation (MEG) in PbSe, PbS, PbTe, and Si QDs and efficient singlet fission (SF) in molecules that satisfy specific requirements for their excited state energy level structure to achieve carrier multiplication. We have studied MEG in close-packed QD arrays where the QDs are electronically coupled in the films and thus exhibit good transport while still maintaining quantization and MEG. We have developed simple, all-inorganic QD solar cells that produce large short-circuit photocurrents and power conversion efficiencies in the 3-5% range via both nanocrystalline Schottky junctions and nanocrystalline p-n junctions. These solar cells also show QYs for photocurrent that exceed 100% in the photon energy regions where MEG is possible; the photocurrent MEG QYs as a function of photon energy match those determined via time-resolved spectroscopy. We have also observed very efficient SF in thin films of molecular crystals of 1,3 diphenylisobenzofuran with quantum yields of 200% at the optimum SF threshold of 2Eg (HOMO-LUMO for S{sub 0}-S{sub 1}), reflecting the creation of two excited triplet states from the first excited singlet state. Various possible configurations for novel solar cells based on MEG in QDs and SF in molecules that could produce high conversion efficiencies will be presented, along with progress in developing such new types of solar cells. Recent analyses of the effect of MEG or SF combined with solar concentration on the conversion efficiency of solar cells will be discussed.

  9. The Honorable Wlliaq~ S. Cohen

    Office of Legacy Management (LM)

    ... I Latty Ave. Properties St. Louis Airport Vicinity Properties St. Louis Downtown Site . DuPont Maywood Wayne i . M iddlesex Sampling Plant ' Ashland 1 Ashland 2 Seaway Industrial ...

  10. The Honorable, William S . Cohen

    Office of Legacy Management (LM)

    ... - ' . -2. , - - - 7 * - I -r* -: - ' * . . . -. m I Site Name Latty Ave. Properties St. Louis Airport .Vicinity Properties St. Louis Downtown Site. DuPont Maywood Wayne : . ...

  11. The Honorable, William S . Cohen

    Office of Legacy Management (LM)

    ... Latty Ave. Properties St. Louis Airport Vicinity Properties St. Louis Downtown Site. DuPont Maywood . Wayne i '. M iddlesex Sampling Plant ' Ashland 1 Ashland 2 Seaway Industrial ...

  12. The Honorable Peter J. Sferrazza

    Office of Legacy Management (LM)

    If you haves any questions, please feel free to call me at,301-42?-1721 or' Dr. W.,Alexander Williams (301:427rl719) of my staff. Enclosures '., Off-SiteSavannah River"Division' ...

  13. The Honorable Richard Arrington, Jr.

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of my staff. . zJc,T, C?ames W. Wagoner IIv Director Off-SiteSavannah River Program Division Office of Eastern Area Programs Office of ...

  14. The Honorable MichaeTCrincoli :'

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427AJ719) of my.staff. . '. . EncT,osures ' james W. Wagoner II Director ,Off-SiteSavannah River Division" Office ,of Eastern Area Programs Office of ...

  15. The Honorable Wellington E. Webb

    Office of Legacy Management (LM)

    Enclosures ' YU .- James W. Wagoner II. -Director' , ' ? 1 5 ;Off-SiteSavannah,River Program Division, : ,Office,of Eastern Area Programs: '. Office,of Environmental ...

  16. The Honorable'Anthony Mosillo .'

    Office of Legacy Management (LM)

    W. Alexander Williams (301-427-1719) of my staff.. : ., 1 : James W. Wagoner II' ',.. : Director' '. Off-SiteSavannah River Division .I, Office of EasternArea Programs Enclosures ...

  17. The Honorable Sebastian J'. Garafalb.

    Office of Legacy Management (LM)

    W . Alexander W illiams (301-427-1719) of my staff. 1 Enclosures lff-SiteSavannah 'River Program,Division O ffice' of EasternArea Programs .;G ffice of Environ,mental Restoration, ...

  18. The Honorable Rick.~Cole, ~

    Office of Legacy Management (LM)

    W.' Alexander W illiams (301-427-179) of my staff. Enclosures James, W. Wagoner II . . Director Off-SiteSavannah IRiver Division Office of.Eastern Area Programs Office of ...

  19. The Honorable Patrick J. Gibbs

    Office of Legacy Management (LM)

    If you have any questions, please feel free to call me at 301-427-1721 or Dr. W. Alexander Williams (301-427-1719) of my staff. Director Off-SiteSavannah River Division Office of ...

  20. The Honorable Gary L. Willard

    Office of Legacy Management (LM)

    If you have any questions, ,please feel free to call'me at 301-427-1721 or Dr. W. Alexander Williams (301-427-1719) of my staff. i. Sincerelv. Director .Off-SiteSavannah River ...

  1. The Honorable Bill Johnson j.

    Office of Legacy Management (LM)

    W. Alexander WiTliams,(301Y427-1719) of my staff. ':. .I Enclosures Sincerely, " James W.'Wagoner II Director ,V" I -Off-SiteSavannah River Division 'I 'Office of Eastern Area ...

  2. Los Alamos honors Laboratory Fellows

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

    Laboratory Fellows November 19, 2012 Engineering, physics and computer science leaders announced LOS ALAMOS, N.M., November 19, 2012-Three distinguished members of the Los Alamos...

  3. Intelligence team given national honor

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

    of our staff allows us to answer difficult questions for the intelligence community," said Michael Anastasio, Los Alamos National Laboratory director. "Our scientists use...

  4. Honoring Our Veterans Through Service

    Broader source: Energy.gov [DOE]

    Check out the Secretary's visit to New Orleans where he got his hands dirty with the St. Bernard Project.

  5. Characterization of the nanoDot OSLD dosimeter in CT

    SciTech Connect (OSTI)

    Scarboro, Sarah B.; Cody, Dianna; Followill, David; Court, Laurence; Stingo, Francesco C.; Kry, Stephen F.; Alvarez, Paola; Zhang, Di; McNitt-Gray, Michael

    2015-04-15

    Purpose: The extensive use of computed tomography (CT) in diagnostic procedures is accompanied by a growing need for more accurate and patient-specific dosimetry techniques. Optically stimulated luminescent dosimeters (OSLDs) offer a potential solution for patient-specific CT point-based surface dosimetry by measuring air kerma. The purpose of this work was to characterize the OSLD nanoDot for CT dosimetry, quantifying necessary correction factors, and evaluating the uncertainty of these factors. Methods: A characterization of the Landauer OSL nanoDot (Landauer, Inc., Greenwood, IL) was conducted using both measurements and theoretical approaches in a CT environment. The effects of signal depletion, signal fading, dose linearity, and angular dependence were characterized through direct measurement for CT energies (80–140 kV) and delivered doses ranging from ∼5 to >1000 mGy. Energy dependence as a function of scan parameters was evaluated using two independent approaches: direct measurement and a theoretical approach based on Burlin cavity theory and Monte Carlo simulated spectra. This beam-quality dependence was evaluated for a range of CT scanning parameters. Results: Correction factors for the dosimeter response in terms of signal fading, dose linearity, and angular dependence were found to be small for most measurement conditions (<3%). The relative uncertainty was determined for each factor and reported at the two-sigma level. Differences in irradiation geometry (rotational versus static) resulted in a difference in dosimeter signal of 3% on average. Beam quality varied with scan parameters and necessitated the largest correction factor, ranging from 0.80 to 1.15 relative to a calibration performed in air using a 120 kV beam. Good agreement was found between the theoretical and measurement approaches. Conclusions: Correction factors for the measurement of air kerma were generally small for CT dosimetry, although angular effects, and particularly effects due to changes in beam quality, could be more substantial. In particular, it would likely be necessary to account for variations in CT scan parameters and measurement location when performing CT dosimetry using OSLD.

  6. Ground state energy of an exciton in a spherical quantum dot in the presence of an external magnetic field

    SciTech Connect (OSTI)

    Jahan K, Luhluh Boda, Aalu; Chatterjee, Ashok

    2015-05-15

    The problem of an exciton trapped in a three dimensional Gaussian quantum dot is studied in the presence of an external magnetic field. A variational method is employed to obtain the ground state energy of the exciton as a function of the quantum dot size, the confinement strength and the magnetic field. It is also shown that the variation of the size of the exciton with the radius of the quantum dot.

  7. Cavity-enhanced single photon emission from site-controlled In(Ga)As quantum dots fabricated using nanoimprint lithography

    SciTech Connect (OSTI)

    Tommila, J.; Hakkarainen, T. V.; Schramm, A. Guina, M.; Belykh, V. V.; Sibeldin, N. N.; Heinonen, E.

    2014-05-26

    We report on the emission dynamics of single In(Ga)As quantum dots formed in etched GaAs pits and integrated into micropillar cavities. The site-controlled quantum dots were fabricated by molecular beam epitaxy on nanoimprint lithography patterned GaAs(001) surfaces. Triggered single photon emission confirmed by photon autocorrelation measurements is demonstrated. Time-resolved photoluminescence experiments clearly show an effect of the cavity on the spontaneous emission rate of the quantum dot.

  8. Electrically driven single photon emission from a CdSe/ZnSSe single quantum dot at 200?K

    SciTech Connect (OSTI)

    Quitsch, Wolf; Kmmell, Tilmar; Bacher, Gerd; Gust, Arne; Kruse, Carsten; Hommel, Detlef

    2014-09-01

    High temperature operation of an electrically driven single photon emitter based on a single epitaxial quantum dot is reported. CdSe/ZnSSe/MgS quantum dots are embedded into a p-i-n diode architecture providing almost background free excitonic and biexcitonic electroluminescence from individual quantum dots through apertures in the top contacts. Clear antibunching with g{sup 2}(??=?0)?=?0.28??0.20 can be tracked up to T?=?200?K, representing the highest temperature for electrically triggered single photon emission from a single quantum dot device.

  9. PROPERTIES OF UMBRAL DOTS FROM STRAY LIGHT CORRECTED HINODE FILTERGRAMS

    SciTech Connect (OSTI)

    Louis, Rohan E.; Mathew, Shibu K.; Bayanna, A. Raja; Rubio, Luis R. Bellot; Ichimoto, Kiyoshi; Ravindra, B.

    2012-06-20

    High-resolution blue continuum filtergrams from Hinode are employed to study the umbral fine structure of a regular unipolar sunspot. The removal of scattered light from the images increases the rms contrast by a factor of 1.45 on average. Improvement in image contrast renders identification of short filamentary structures resembling penumbrae that are well separated from the umbra-penumbra boundary and comprise bright filaments/grains flanking dark filaments. Such fine structures were recently detected from ground-based telescopes and have now been observed with Hinode. A multi-level tracking algorithm was used to identify umbral dots (UDs) in both the uncorrected and corrected images and to track them in time. The distribution of the values describing the photometric and geometric properties of UDs is more easily affected by the presence of stray light while it is less severe in the case of kinematic properties. Statistically, UDs exhibit a peak intensity, effective diameter, lifetime, horizontal speed, and a trajectory length of 0.29I{sub QS}, 272 km, 8.4 minutes, 0.45 km s{sup -1}, and 221 km, respectively. The 2 hr 20 minute time sequence depicts several locations where UDs tend to appear and disappear repeatedly with various time intervals. The correction for scattered light in the Hinode filtergrams facilitates photometry of umbral fine structure, which can be related to results obtained from larger telescopes and numerical simulations.

  10. Quantum Dot Solar Cells: High Efficiency through Multiple Exciton Generation

    SciTech Connect (OSTI)

    Hanna, M. C.; Ellingson, R. J.; Beard, M.; Yu, P.; Micic, O. I.; Nozik, A. J.; c.

    2005-01-01

    Impact ionization is a process in which absorbed photons in semiconductors that are at least twice the bandgap can produce multiple electron-hole pairs. For single-bandgap photovoltaic devices, this effect produces greatly enhanced theoretical thermodynamic conversion efficiencies that range from 45-85%, depending upon solar concentration, the cell temperature, and the number of electron-hole pairs produced per photon. For quantum dots (QDs), electron-hole pairs exist as excitons. We have observed astoundingly efficient multiple exciton generation (MEG) in QDs of PbSe (bulk Eg = 0.28 eV), ranging in diameter from 3.9 to 5.7nm (Eg = 0.73, 0.82, and 0.91 eV, respectively). The effective masses of electron and holes are about equal in PbSe, and the onset for efficient MEG occurs at about three times the QD HOMO-LUMO transition (its ''bandgap''). The quantum yield rises quickly after the onset and reaches 300% at 4 x Eg (3.64 eV) for the smallest QD; this means that every QD in the sample produces three electron-hole pairs/photon.

  11. Quantum-Dots Based Electrochemical Immunoassay of Interleukin-1?

    SciTech Connect (OSTI)

    Wu, Hong; Liu, Guodong; Wang, Jun; Lin, Yuehe

    2007-07-01

    We describe a quantum-dot (QD, CdSe@ZnS)-based electrochemical immunoassay to detect a protein biomarker, interleukin-1? (IL-1?). QD conjugated with anti-IL-1? antibody was used as a label in an immunorecognition event. After a complete sandwich immunoreaction among the primary IL-1? antibody (immobilized on the avidin-modified magnetic beads), IL-1?, and the QD-labeled secondary antibody, QD labels were attached to the magnetic-bead surface through the antibody-antigen immunocomplex. Electrochemical stripping analysis of the captured QDs was used to quantify the concentration of IL-1? after an acid-dissolution step. The streptavidin-modified magnetic beads and the magnetic separation platform were used to integrate a facile antibody immobilization (through a biotin/streptavidin interaction) with immunoreactions and the isolation of immunocomplexes from reaction solutions in the assay. The voltammetric response is highly linear over the range of 0.5 to 50 ng mL-1 IL 1?, and the limit of detection is estimated to be 0.3 ng mL-1 (18 pM). This QD-based electrochemical immunoassay shows great promise for rapid, simple, and cost-effective analysis of protein biomarkers.

  12. High color rendering index white light emitting diodes fabricated from a combination of carbon dots and zinc copper indium sulfide quantum dots

    SciTech Connect (OSTI)

    Sun, Chun; Liu, Wenyan; Zhang, Xiaoyu; Zhang, Yu E-mail: wyu6000@gmail.com; Wang, Yu; Kalytchuk, Sergii; Kershaw, Stephen V.; Rogach, Andrey L.; Zhang, Tieqiang; Zhao, Jun; Yu, William W. E-mail: wyu6000@gmail.com

    2014-06-30

    In a line with most recent trends in developing non-toxic fluorescent nanomaterials, we combined blue emissive carbon dots with green and red emissive zinc copper indium sulfide (ZCIS) core/shell quantum dots (QDs) to achieve white light-emitting diodes (WLEDs) with a high color rendering index of 93. This indicates that ZCIS QDs, with their broad emission bands, can be employed to effectively make up the emission of carbon dots in the yellow and red regions to produce WLEDs in the wide region of color temperature by tuning the volume ratio of these constituting luminophores. Their electroluminescence characteristics including color rendering index, Commission Internationale de l'Eclairage (CIE) color coordinates, and color temperatures were evaluated as a function of forward current. The CIE-1931 chromaticity coordinates of the as-prepared WLEDs, exhibiting good stability, were slightly shifted from (0.321, 0.312) at 10?mA to (0.351, 0.322) at 30?mA, which was mainly caused by the different thermal quenching coefficients of carbon dots and ZCIS QDs.

  13. Semiconductor Quantum Dots and Quantum Dot Arrays and Applications of Multiple Exciton Generation to Third-Generation Photovoltaic Solar Cells

    SciTech Connect (OSTI)

    Nozik, Arthur J.; Beard, Matthew C.; Luther, Joseph M.; Law, Matt; Ellingson, Randy J.; Johnson, Justin C.

    2010-10-14

    Here, we will first briefly summarize the general principles of QD synthesis using our previous work on InP as an example. Then we will focus on QDs of the IV-VI Pb chalcogenides (PbSe, PbS, and PbTe) and Si QDs because these were among the first QDs that were reported to produce multiple excitons upon absorbing single photons of appropriate energy (a process we call multiple exciton generation (MEG)). We note that in addition to Si and the Pb-VI QDs, two other semiconductor systems (III-V InP QDs(56) and II-VI core-shell CdTe/CdSe QDs(57)) were very recently reported to also produce MEG. Then we will discuss photogenerated carrier dynamics in QDs, including the issues and controversies related to the cooling of hot carriers and the magnitude and significance of MEG in QDs. Finally, we will discuss applications of QDs and QD arrays in novel quantum dot PV cells, where multiple exciton generation from single photons could yield significantly higher PV conversion efficiencies.

  14. Multi-stacked InAs/GaAs quantum dots grown with different growth modes for quantum dot solar cells

    SciTech Connect (OSTI)

    Kim, Yeongho; Ban, Keun-Yong Honsberg, Christiana B.

    2015-06-01

    We have studied the material properties and device performance of InAs/GaAs quantum dot solar cells (QDSCs) made using three different QD growth modes: Stranski-Krastanov (S-K), quasi-monolayer (QML), and sub-monolayer (SML) growth modes. All QDSCs show an extended external quantum efficiency (EQE) at near infrared wavelengths of 9501070?nm from the QD absorption. Compared to the S-K and SML QDSCs, the QML QDSC with a higher strain exhibits a poor EQE response in the wavelength region of 300880?nm due to increased non-radiative recombination. The conversion efficiency of the S-K and SML QDSCs exceeds that of the reference cell (13.4%) without QDs due to an enhanced photocurrent (>16% increase) produced by the silicon doped QD stacks. However, as expected from the EQE of the QML QDSC, the increase of strain-induced crystalline defects greatly degrades the photocurrent and open-circuit voltage, leading to the lowest conversion efficiency (8.9%)

  15. Tunnel-injection GaN quantum dot ultraviolet light-emitting diodes

    SciTech Connect (OSTI)

    Verma, Jai; Kandaswamy, Prem Kumar; Protasenko, Vladimir; Verma, Amit; Grace Xing, Huili; Jena, Debdeep

    2013-01-28

    We demonstrate a GaN quantum dot ultraviolet light-emitting diode that uses tunnel injection of carriers through AlN barriers into the active region. The quantum dot heterostructure is grown by molecular beam epitaxy on AlN templates. The large lattice mismatch between GaN and AlN favors the formation of GaN quantum dots in the Stranski-Krastanov growth mode. Carrier injection by tunneling can mitigate losses incurred in hot-carrier injection in light emitting heterostructures. To achieve tunnel injection, relatively low composition AlGaN is used for n- and p-type layers to simultaneously take advantage of effective band alignment and efficient doping. The small height of the quantum dots results in short-wavelength emission and are simultaneously an effective tool to fight the reduction of oscillator strength from quantum-confined Stark effect due to polarization fields. The strong quantum confinement results in room-temperature electroluminescence peaks at 261 and 340 nm, well above the 365 nm bandgap of bulk GaN. The demonstration opens the doorway to exploit many varied features of quantum dot physics to realize high-efficiency short-wavelength light sources.

  16. The impact of disorder on charge transport in three dimensional quantum dot resonant tunneling structures

    SciTech Connect (OSTI)

    Puthen-Veettil, B. Patterson, R.; Knig, D.; Conibeer, G.; Green, M. A.

    2014-10-28

    Efficient iso-entropic energy filtering of electronic waves can be realized through nanostructures with three dimensional confinement, such as quantum dot resonant tunneling structures. Large-area deployment of such structures is useful for energy selective contacts but such configuration is susceptible to structural disorders. In this work, the transport properties of quantum-dot-based wide-area resonant tunneling structures, subject to realistic disorder mechanisms, are studied. Positional variations of the quantum dots are shown to reduce the resonant transmission peaks while size variations in the device are shown to reduce as well as broaden the peaks. Increased quantum dot size distribution also results in a peak shift to lower energy which is attributed to large dots dominating transmission. A decrease in barrier thickness reduces the relative peak height while the overall transmission increases dramatically due to lower series resistance. While any shift away from ideality can be intuitively expected to reduce the resonance peak, quantification allows better understanding of the tolerances required for fabricating structures based on resonant tunneling phenomena/.

  17. Test and evaluation document for DOT Specification 7A type A packaging. Volume 1

    SciTech Connect (OSTI)

    Kelly, D L

    1997-08-04

    The US Department of Energy (DOE) has been conducting, through several of its operating contractors, an evaluation and testing program to qualify Type A radioactive material packagings per US Department of Transportation (DOT) Specification 7A (DOT-7A) of the Code of Federal Regulations (CFR), Title 49, Part 178 (49 CFR 178). This document summarizes the evaluation and testing performed for all of the packagings successfully qualified in this program. This document supersedes DOE Evaluation Document for DOT-7A Type A Packaging (Edling 1987), originally issued in 1987 by Monsanto Research Corporation Mound Laboratory (MLM), Miamisburg, Ohio, for the Department of Energy, Security Evaluation Program (I)P-4. Mound Laboratory issued four revisions to the document between November 1988 and December 1989. In September 1989, the program was transferred to Westinghouse Hanford Company (Westinghouse Hanford) in Richland, Washington. One additional revision was issued in March 1990 by Westinghouse Hanford. This revision reflects the earlier material and incorporates a number of changes. Evaluation and testing activities on 1208 three DOT-7A Program Dockets resulted in the qualification of three new packaging configurations, which are incorporated herein and summarized. This document presents approximately 300 different packagings that have been determined to meet the requirements for a DOT-7A, type A packaging per 49 CFR 178.350.

  18. Photoluminescence properties of cadmium-selenide quantum dots embedded in a liquid-crystal polymer matrix

    SciTech Connect (OSTI)

    Tselikov, G. I. Timoshenko, V. Yu.; Plenge, J.; Ruehl, E.; Shatalova, A. M.; Shandryuk, G. A.; Merekalov, A. S.; Tal'roze, R. V.

    2013-05-15

    The photoluminescence properties of cadmium-selenide (CdSe) quantum dots with an average size of {approx}3 nm, embedded in a liquid-crystal polymer matrix are studied. It was found that an increase in the quantum-dot concentration results in modification of the intrinsic (exciton) photoluminescence spectrum in the range 500-600 nm and a nonmonotonic change in its intensity. Time-resolved measurements show the biexponential decay of the photoluminescence intensity with various ratios of fast and slow components depending on the quantum-dot concentration. In this case, the characteristic lifetimes of exciton photoluminescence are 5-10 and 35-50 ns for the fast and slow components, respectively, which is much shorter than the times for colloidal CdSe quantum dots of the same size. The observed features of the photoluminescence spectra and kinetics are explained by the effects of light reabsorption, energy transfer from quantum dots to the liquid-crystal polymer matrix, and the effect of the electronic states at the CdSe/(liquid crystal) interface.

  19. Inhibition of plasmonically enhanced interdot energy transfer in quantum dot solids via photo-oxidation

    SciTech Connect (OSTI)

    Sadeghi, S. M.; Nejat, A.; West, R. G.

    2012-11-15

    We studied the impact of photophysical and photochemical processes on the interdot Forster energy transfer in monodisperse CdSe/ZnS quantum dot solids. For this, we investigated emission spectra of CdSe/ZnS quantum dot solids in the vicinity of gold metallic nanoparticles coated with chromium oxide. The metallic nanoparticles were used to enhance the rate of the energy transfer between the quantum dots, while the chromium oxide coating led to significant increase of their photo-oxidation rates. Our results showed that irradiation of such solids with a laser beam can lead to unique spectral changes, including narrowing and blue shift. We investigate these effects in terms of inhibition of the plasmonically enhanced interdot energy transfer between quantum dots via the chromium-oxide accelerated photo-oxidation process. We demonstrate this considering energy-dependent rate of the interdot energy transfer process, plasmonic effects, and the way photo-oxidation enhances non-radiative decay rates of quantum dots with different sizes.

  20. Energy levels of double triangular graphene quantum dots

    SciTech Connect (OSTI)

    Liang, F. X.; Jiang, Z. T. Zhang, H. Y.; Li, S.; Lv, Z. T.

    2014-09-28

    We investigate theoretically the energy levels of the coupled double triangular graphene quantum dots (GQDs) based on the tight-binding Hamiltonian model. The double GQDs including the ZZ-type, ZA-type, and AA-type GQDs with the two GQDs having the zigzag or armchair boundaries can be coupled together via different interdot connections, such as the direct coupling, the chains of benzene rings, and those of carbon atoms. It is shown that the energy spectrum of the coupled double GQDs is the amalgamation of those spectra of the corresponding two isolated GQDs with the modification triggered by the interdot connections. The interdot connection is inclined to lift up the degeneracies of the energy levels in different degree, and as the connection changes from the direct coupling to the long chains, the removal of energy degeneracies is suppressed in ZZ-type and AA-type double GQDs, which indicates that the two coupled GQDs are inclined to become decoupled. Then we consider the influences on the spectra of the coupled double GQDs induced by the electric fields applied on the GQDs or the connection, which manifests as the global spectrum redistribution or the local energy level shift. Finally, we study the symmetrical and asymmetrical energy spectra of the double GQDs caused by the substrates supporting the two GQDs, clearly demonstrating how the substrates affect the double GQDs' spectrum. This research elucidates the energy spectra of the coupled double GQDs, as well as the mechanics of manipulating them by the electric field and the substrates, which would be a significant reference for designing GQD-based devices.

  1. Luminescence of CdSe/ZnS quantum dots infiltrated into an opal matrix

    SciTech Connect (OSTI)

    Gruzintsev, A. N. Emelchenko, G. A.; Masalov, V. M.; Yakimov, E. E.; Barthou, C.; Maitre, A.

    2009-02-15

    The effect of the photonic band gap in the photonic crystal, the synthesized SiO{sub 2} opal with embedded CdSe/ZnS quantum dots, on its luminescence in the visible spectral region is studied. It is shown that the position of the photonic band gap in the luminescence and reflectance spectra for the infiltrated opal depends on the diameter of the constituent nanospheres and on the angle of recording the signal. The optimal conditions for embedding the CdSe/ZnS quantum dots from the solution into the opal matrix are determined. It is found that, for the opal-CdSe/ZnS nanocomposites, the emission intensity decreases and the luminescence decay time increases in the spatial directions, in which the spectral positions of the photonic band gap and the luminescence peak of the quantum dots coincide.

  2. Extraction of inhomogeneous broadening and nonradiative losses in InAs quantum-dot lasers

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

    Chow, Weng W.; Liu, Alan Y.; Gossard, Arthur C.; Bowers, John E.

    2016-01-01

    We present a method to quantify inhomogeneous broadening and nonradiative losses in quantum dot lasers by comparing the gain and spontaneous emission results of a microscopic laser theory with measurements made on 1.3 μm InAs quantum-dot lasers. Calculated spontaneous-emission spectra are first matched to those measured experimentally to determine the inhomogeneous broadening in the experimental samples. This is possible because treatment of carrier scattering at the level of quantum kinetic equations provides the homogeneously broadened spectra without use of free parameters, such as the dephasing rate. Thus we then extract the nonradiative recombination current associated with the quantum-dot active regionmore » from a comparison of measured and calculated gain versus current relations.« less

  3. Tunnel magnetoresistance and linear conductance of double quantum dots strongly coupled to ferromagnetic leads

    SciTech Connect (OSTI)

    Weymann, Ireneusz

    2015-05-07

    We analyze the spin-dependent linear-response transport properties of double quantum dots strongly coupled to external ferromagnetic leads. By using the numerical renormalization group method, we determine the dependence of the linear conductance and tunnel magnetoresistance on the degree of spin polarization of the leads and the position of the double dot levels. We focus on the transport regime where the system exhibits the SU(4) Kondo effect. It is shown that the presence of ferromagnets generally leads the suppression of the linear conductance due to the presence of an exchange field. Moreover, the exchange field gives rise to a transition from the SU(4) to the orbital SU(2) Kondo effect. We also analyze the dependence of the tunnel magnetoresistance on the double dot levels' positions and show that it exhibits a very nontrivial behavior.

  4. Enhanced spontaneous emission of CdSe quantum dots in monolithic II-VI pillar microcavities

    SciTech Connect (OSTI)

    Lohmeyer, H.; Kruse, C.; Sebald, K.; Gutowski, J.; Hommel, D.

    2006-08-28

    The emission properties of CdSe/ZnSe quantum dots in ZnSe-based pillar microcavities are studied. All-epitaxial cavities made of ZnSSe and MgS/ZnCdSe superlattices with a single quantum-dot sheet embedded have been grown by molecular beam epitaxy. Pillar structures with diameters down to 500 nm have been realized by focused-ion-beam etching. A pronounced enhancement of the spontaneous emission rate of quantum dots coupling to the fundamental mode of the cavities is found as evidence for the Purcell effect. The enhancement by a factor of up to 3.8 depends systematically on the pillar diameter and thus on the Purcell factor of the individual pillars.

  5. Carrier multiplication detected through transient photocurrent in device-grade films of lead selenide quantum dots

    SciTech Connect (OSTI)

    Gao, Jianbo; Fidler, Andrew F.; Klimov, Victor I.

    2015-09-08

    In carrier multiplication, the absorption of a single photon results in two or more electronhole pairs. Quantum dots are promising materials for implementing carrier multiplication principles in real-life technologies. So far, however, most of research in this area has focused on optical studies of solution samples with yet to be proven relevance to practical devices. We report ultra-fast electro-optical studies of device-grade films of electronically coupled quantum dots that allow us to observe multiplication directly in the photocurrent. Our studies help rationalize previous results from both optical spectroscopy and steady-state photocurrent measurements and also provide new insights into effects of electric field and ligand treatments on multiexciton yields. Importantly, we demonstrate that using appropriate chemical treatments of the films, extra charges produced by carrier multiplication can be extracted from the quantum dots before they are lost to Auger recombination and hence can contribute to photocurrent of practical devices.

  6. Design of quantum dot lattices in amorphous matrices by ion beam irradiation

    SciTech Connect (OSTI)

    Buljan, M.; Bogdanovic-Radovic, I.; Karlusic, M.; Desnica, U. V.; Radic, N.; Jaksic, M.; Salamon, K.; Drazic, G.; Bernstorff, S.; Holy, V.

    2011-10-15

    We report on the highly controllable self-assembly of semiconductor quantum dots and metallic nanoparticles in a solid amorphous matrix, induced by ion beam irradiation of an amorphous multilayer. We demonstrate experimentally and theoretically a possibility to tune the basic structural properties of the quantum dots in a wide range. Furthermore, the sizes, distances, and arrangement type of the quantum dots follow simple equations dependent on the irradiation and the multilayer properties. We present a Monte Carlo model for the simulation and prediction of the structural properties of the materials formed by this method. The presented results enable engineering and simple production of functional materials or simple devices interesting for applications in nanotechnology.

  7. Microscopic model for intersubband gain from electrically pumped quantum-dot structures

    SciTech Connect (OSTI)

    Michael, Stephan; Chow, Weng Wah; Schneider, Han Christian

    2014-10-03

    We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-infrared range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantum wells. We numerically analyze a comprehensive model by combining a many-particle approach for electronic dynamics with a realistic modeling of the electronic states in the whole structure. We investigate the gain both for quasi-equilibrium conditions and current injection. We find, comparing different structures, that steady-state gain can only be realized by an efficient extraction process, which prevents an accumulation of electrons in continuum states, that make the available scattering pathways through the quantum-dot active region too fast to sustain inversion.

  8. Microscopic model for intersubband gain from electrically pumped quantum-dot structures

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

    Michael, Stephan; Chow, Weng Wah; Schneider, Han Christian

    2014-10-03

    We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-infrared range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantum wells. We numerically analyze a comprehensive model by combining a many-particle approach for electronic dynamics with a realistic modeling of the electronic states in the whole structure. We investigate the gain both for quasi-equilibrium conditions and current injection. We find, comparing different structures, that steady-state gain can only be realized by an efficient extraction process, which prevents an accumulation of electrons in continuum states, thatmore » make the available scattering pathways through the quantum-dot active region too fast to sustain inversion.« less

  9. AUTHORIZING THE DOT SPECIFICATION 6M PACKAGING FOR CONTINUED USE AT THE SAVANNAH RIVER SITE

    SciTech Connect (OSTI)

    Watkins, R.; Loftin, B.; Hoang, D.

    2010-03-04

    The U.S. Department of Transportation (DOT) Specification 6M packaging was in extensive use for more than 40 years for in-commerce shipments of Type B quantities of fissile and radioactive material (RAM) across the USA, among the Department of Energy (DOE) laboratories, and between facilities in the DOE production complex. In January 2004, the DOT Research and Special Programs Administration (RSPA) Agency issued a final rule in the Federal Register to ammend requirements in the Hazardous Materials Regulations (HMR) pertaining to the transportation of radioactive materials. The final rule became effective on October 1, 2004. One of those changes discontinued the use of the DOT specification 6M, along with other DOT specification packagings, on October 1, 2008. A main driver for the change was due to the fact that 6M specification packagings were not supported by a Safety Analysis Report for Packagings (SARP) that was compliant with Title 10 of the Code of Federal Regulations (CFR) Part 71 (10 CFR 71). The regulatory rules for the discontinued use have been edited in Title 49 of the CFR Parts 100-185, 2004 edition and thereafter. Prior to October 1, 2008, the use of the 6M within the boundaries of the Savannah River Site (SRS), called an onsite transfer, was governed by an onsite transportation document that referenced 49 CFR Parts 100-185. SRS had to develop an Onsite Safety Assessment (OSA) which was independent of 49 CFR in order to justify the continued use of the DOT Specification 6M for the transfer of radioactive material (RAM) at the SRS after October 1, 2008. This paper will discuss the methodology for and difficulties associated with authorizing the DOT Specification 6M Packaging for continued use at the Savannah River Site.

  10. Test and evaluation document for DOT Specification 7A Type A Packaging. Revision 3

    SciTech Connect (OSTI)

    1996-01-30

    The US Department of Energy (DOE) has been conducting, through several of its operating contractors, an evaluation and testing program to qualify Type A radioactive material packagings per US Department of Transportation (DOT) Specification 7A (DOT-7A) of the Code of Federal Regulations (CFR), Title 49, Part 178 (49 CFR 178). The program is currently administered by the DOE, Office of Facility Safety Analysis, DOE/EH-32, at DOE-Headquarters (DOE-HQ) in Germantown, Maryland. This document summarizes the evaluation and testing performed for all of the packagings successfully qualified in this program.

  11. g-factor anisotropy in nanowire-based InAs quantum dots

    SciTech Connect (OSTI)

    D'Hollosy, Samuel; Fábián, Gábor; Baumgartner, Andreas; Schönenberger, Christian; Nygård, Jesper

    2013-12-04

    The determination and control of the electron g-factor in semiconductor quantum dots (QDs) are fundamental prerequisites in modern concepts of spintronics and spin-based quantum computation. We study the dependence of the g-factor on the orientation of an external magnetic field in quantum dots (QDs) formed between two metallic contacts on stacking fault free InAs nanowires. We extract the g-factor from the splitting of Kondo resonances and find that it varies continuously in the range between |g*| = 5 and 15.

  12. 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.

  13. Temperature dependent photoluminescence and micromapping of multiple stacks InAs quantum dots

    SciTech Connect (OSTI)

    Xu, Ming Jaffré, Alexandre Alvarez, José Kleider, Jean-Paul Boutchich, Mohamed; Jittrong, Apichat; Chokamnuai, Thitipong; Panyakeow, Somsak; Kanjanachuchai, Songphol

    2015-02-27

    We utilized temperature dependent photoluminescence (PL) techniques to investigate 1, 3 and 5 stack InGaAs quantum dots (QDs) grown on cross-hatch patterns. PL mapping can well reproduce the QDs distribution as AFM and position dependency of QD growth. It is possible to observe crystallographic dependent PL. The temperature dependent spectra exhibit the QDs energy distribution which reflects the size and shape. The inter-dot carrier coupling effect is observed and translated as a red shift of 120mV on the [1–10] direction peak is observed at 30K on 1 stack with regards to 3 stacks samples, which is assigned to lateral coupling.

  14. Safety analysis report for packaging: the ORNL DOT specification 6M - special form package

    SciTech Connect (OSTI)

    Schaich, R.W.

    1982-07-01

    The ORNL DOT Specification 6M - Special Form Package was fabricated at the Oak Ridge Nation al Laboratory (ORNL) for the transport of Type B solid non-fissile radioactive materials in special form. The package was evaluated on the basis of tests performed by the Dow Chemical Company, Rocky Flats Division, on the DOT-6M container and special form tests performed on a variety of stainless steel capsules at ORNL by Operations Division personnel. The results of these evaluations demonstrate that the package is in compliance with the applicable regulations for the transport of Type B quantities in special form of non-fissile radioactive materials.

  15. Density-Dependent Carrier Dynamics in a Quantum Dots-in-a-Well

    Office of Scientific and Technical Information (OSTI)

    Heterostructure. (Journal Article) | SciTech Connect Density-Dependent Carrier Dynamics in a Quantum Dots-in-a-Well Heterostructure. Citation Details In-Document Search Title: Density-Dependent Carrier Dynamics in a Quantum Dots-in-a-Well Heterostructure. Abstract not provided. Authors: Chow, Weng W. ; Prasankumar, Rohit P. ; Urayama, Junji ; Attaluri, R. S. ; Shenoi, R. V. ; Krishna, S. ; Taylor, A. J. Publication Date: 2010-11-01 OSTI Identifier: 1121942 Report Number(s): SAND2010-7836J

  16. Observation of the Kondo effect in a spin-3/2 hole quantum dot

    SciTech Connect (OSTI)

    Klochan, O.; Micolich, A. P.; Hamilton, A. R.; Trunov, K.; Reuter, D.; Wieck, A. D.

    2013-12-04

    We report the observation of the Kondo effect in a spin-3/2 hole quantum dot formed near pinch-off in a GaAs quantum wire. We clearly observe two distinctive hallmarks of quantum dot Kondo physics. First, the zero-bias peak in the differential conductance splits an in-plane magnetic field and the splitting is independent of gate voltage. Second, the splitting rate is twice as large as that for the lowest one-dimensional subband. We show that the Zeeman splitting of the zero-bias peak is highly anisotropic and attribute this to the strong spin-orbit interaction for holes in GaAs.

  17. Photo-induced conductance fluctuations in mesoscopic Ge/Si systems with quantum dots

    SciTech Connect (OSTI)

    Stepina, N. P.; Dvurechenskii, A. V.; Nikiforov, A. I.; Moers, J.; Gruetzmacher, D.

    2014-08-20

    We study the evolution of electron transport in strongly localized mesoscopic system with quantum dots under small photon flux. Exploring devices with narrow transport channels lead to the observation of giant fluctuations of the photoconductance, which is attributed to the strong dependence of hopping current on the filling of dots by holes. In our experiments, single-photon mode operation is indicated by the linear dependence of the frequency of photo-induced fluctuations on the light intensity and the step-like response of conductance on the pulse excitation. The effect of the light wavelength, measurement temperature, size of the conductive channel on the device efficiency are considered.

  18. Three dimensional time-gated tracking of non-blinking quantum dots in live

    Office of Scientific and Technical Information (OSTI)

    cells (Journal Article) | SciTech Connect Three dimensional time-gated tracking of non-blinking quantum dots in live cells Citation Details In-Document Search Title: Three dimensional time-gated tracking of non-blinking quantum dots in live cells Single particle tracking has provided a wealth of information about biophysical processes such as motor protein transport and diffusion in cell membranes. However, motion out of the plane of the microscope or blinking of the fluorescent probe used

  19. Three dimensional time-gated tracking of non-blinking quantum dots in live

    Office of Scientific and Technical Information (OSTI)

    cells (Journal Article) | SciTech Connect Three dimensional time-gated tracking of non-blinking quantum dots in live cells Citation Details In-Document Search Title: Three dimensional time-gated tracking of non-blinking quantum dots in live cells × You are accessing a document from the Department of Energy's (DOE) SciTech Connect. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service. Visit OSTI to utilize additional

  20. TiO2 Nanotubes with a ZnO Thin Energy Barrier for Improved Current Efficiency of CdSe Quantum-Dot-Sensitized Solar Cells

    SciTech Connect (OSTI)

    Lee, W.; Kang, S. H.; Kim, J. Y.; Kolekar, G. B.; Sung, Y. E.; Han, S. H.

    2009-01-01

    This paper reports the formation of a thin ZnO energy barrier between a CdSe quantum dot (Q dots) sensitizer and TiO{sub 2} nanotubes (TONTs) for improved current efficiency of Q dot-sensitized solar cells. The formation of a ZnO barrier between TONTs and the Q dot sensitizer increased the short-circuit current under illumination and also reduced the dark current in a dark environment. The power conversion efficiency of Q dot-sensitized TONT solar cells increased by 25.9% in the presence of the ZnO thin layer due to improved charge-collecting efficiency and reduced recombination.