Atmospheric pressure chemical vapor deposition of CdTe for high efficiency thin film PV devices: Annual subcontract report, 26 January 1999--25 January 2000
ITN's three year project Atmospheric Pressure Chemical Vapor Deposition (APCVD) of CdTe for High Efficiency Thin Film PV Devices has the overall objectives of improving thin film CdTe PV manufacturing technology and increasing CdTe PV device power conversion efficiency. CdTe deposition by APCVD employs the same reaction chemistry as has been used to deposit 16% efficient CdTe PV films, i.e., close spaced sublimation, but employs forced convection rather than diffusion as a mechanism of mass transport. Tasks of the APCVD program center on demonstration of APCVD of CdTe films, discovery of fundamental mass transport parameters, application of established engineering principles to the deposition of CdTe films, and verification of reactor design principles which could be used to design high throughput, high yield manufacturing equipment. Additional tasks relate to improved device measurement and characterization procedures that can lead to a more fundamental understanding of CdTe PV device operation and ultimately to higher device conversion efficiency and greater stability. Under the APCVD program, device analysis goes beyond conventional one-dimensional device characterization and analysis toward two dimension measurements and modeling. Accomplishments of the second year of the APCVD subcontract include: deposition of the first APCVD CdTe; identification of deficiencies in the first generation APCVD reactor; design, fabrication and testing of a ``simplified'' APCVD reactor; deposition of the first dense, adherent APCVD CdTe films; fabrication of the first APCVD CdTe PV device; modeling effects of CdSTe and SnOx layers; and electrical modeling of grain boundaries.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC36-99GO10337
- OSTI ID:
- 756255
- Report Number(s):
- NREL/SR-520-28375; TRN: AH200017%%49
- Resource Relation:
- Other Information: PBD: 30 May 2000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Atmospheric Pressure Chemical Vapor Deposition of CdTe for High-Efficiency Thin-Film PV Devices; Annual Report, 26 January 1998-25 January 1999
Processing and modeling issues for thin-film solar cell devices: Annual subcontract report, January 16, 1995 -- January 15, 1996
Related Subjects
36 MATERIALS SCIENCE
CADMIUM TELLURIDES
CHEMICAL VAPOR DEPOSITION
CADMIUM TELLURIDE SOLAR CELLS
FABRICATION
MASS TRANSFER
CHEMICAL REACTORS
MATERIALS HANDLING EQUIPMENT
DESIGN
PERFORMANCE TESTING
PHOTOVOLTAICS
ATMOSPHERIC PRESSURE CHEMICAL VAPOR DEPOSITION
APCVD
CADMIUM TELLURIDE
CDTE
REACTORS
THIN-FILM SOLAR CELLS
MODELING
GRAIN BOUNDARIES
THIN FILM PV PARTNERSHIP