Properties of Wide-Gap Chalcopyrite Semiconductors for Photovoltaic Applications: Final Report, 8 July 1998 -- 17 October 2001
The objectives of this project were to obtain a fundamental understanding of wide-gap chalcopyrite semiconductors and photovoltaic devices. Information to be gathered included significant new fundamental materials data necessary for accurate modeling of single- and tandem-junction devices, basic materials science of wider-gap chalcopyrite semiconductors to be used in next-generation devices, and practical information on the operation of devices incorporating these materials. Deposition used a hybrid sputtering and evaporation method shown previously to produce high-quality epitaxial layers of Cu(In,Ga)Se2 (CIGS). Materials analysis was also provided to assist members of the National CIS Team, of which, through this contract, we were a member. Solar cells produced from resulting single-crystal epitaxial layers in collaboration with various members of the CIS Team were used to determine the factors limiting performance of the devices based on analysis of the results. Because epitaxial growth allows us to determine the surface orientation of our films specifically by choice of the substrate surface on which the film is grown, a major focus of the project concerned the nature of (110)-oriented CIGS films and the performance of solar cells produced from these films. We begin this summary with a description of the results for growth on (110) GaAs, which formed a basis for much of the work ultimately conducted under the program.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC36-99-GO10337
- OSTI ID:
- 15004289
- Report Number(s):
- NREL/SR-520-34335; XAK-8-17619-34; TRN: US201015%%474
- Resource Relation:
- Related Information: Work performed by University of Illinois, Urbana, Illinois
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
CHALCOPYRITE
DEPOSITION
EVAPORATION
ORIENTATION
PERFORMANCE
SIMULATION
SOLAR CELLS
SPUTTERING
SUBSTRATES
PV
MANUFACTURING
THIN FILM
CHALCOPYRITE SEMICONDUCTOR
HYBRID SPUTTERING
SCANNING ELECTRON MICROSCOPY
ATOMIC FORCE MICROSCOPY
ENERGY DISPERSIVE X-RAY SPECTROSCOPY
BACKSCATTERING DIFFRACTION PATTERNS
WIDE GAP
Solar Energy - Photovoltaics