Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells, Final Subcontract Report, 1 July 1988 - 31 December 1991
This report describes research to demonstrate (1) thin film cadmium telluride solar cells with a quantum efficiency of 75% or higher at 0. 44 {mu}m and a photovoltaic efficiency of 11.5% or greater, and (2) thin film zinc telluride and mercury zinc telluride solar cells with a transparency to sub-band-gap radiation of 65% and a photovoltaic conversion efficiency of 5% and 8%, respectively. Work was directed at (1) depositing transparent conducting semiconductor films by solution growth and metal-organic chemical vapor deposition (MOCVD) technique, (2) depositing CdTe films by close-spaced sublimation (CSS) and MOCVD techniques, (3) preparing and evaluating thin film CdTe solar cells, and (4) preparing and characterizing thin film ZnTe, CD{sub 1-x}Zn{sub 1-x}Te, and Hg{sub 1-x}Zn{sub x}Te solar cells. The deposition of CdS films from aqueous solutions was investigated in detail, and their crystallographic, optical, and electrical properties were characterized. CdTe films were deposited from DMCd and DIPTe at 400{degrees}C using TEGa and AsH{sub 3} as dopants. CdTe films deposited by CSS had significantly better microstructures than those deposited by MOCVD. Deep energy states in CdTe films deposited by CSS and MOCVD were investigated. Thin films of ZnTe, Cd{sub 1- x}Zn{sub x}Te, and Hg{sub 1-x}Zn{sub x}Te were deposited by MOCVD, and their crystallographic, optical, and electrical properties were characterized. 67 refs.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 5353308
- Report Number(s):
- NREL/TP-413-4791; ON: DE92001237
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM TELLURIDE SOLAR CELLS
MATERIALS
CADMIUM TELLURIDES
PHYSICAL PROPERTIES
MERCURY TELLURIDES
ZINC TELLURIDES
CHEMICAL VAPOR DEPOSITION
ELECTRICAL PROPERTIES
ENERGY LEVELS
MICROSTRUCTURE
OPTICAL PROPERTIES
PHOTOVOLTAIC CONVERSION
PROGRESS REPORT
QUANTUM EFFICIENCY
RESEARCH PROGRAMS
SUBLIMATION
THIN FILMS
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
CONVERSION
CRYSTAL STRUCTURE
DEPOSITION
DIRECT ENERGY CONVERSION
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
EFFICIENCY
ENERGY CONVERSION
EQUIPMENT
EVAPORATION
FILMS
MERCURY COMPOUNDS
PHASE TRANSFORMATIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE COATING
TELLURIDES
TELLURIUM COMPOUNDS
ZINC COMPOUNDS
photovoltaics
solar cells
thin films
cadmium telluride
zinc telluride
mercury zinc telluride
140501* - Solar Energy Conversion- Photovoltaic Conversion
360606 - Other Materials- Physical Properties- (1992-)
360601 - Other Materials- Preparation & Manufacture
360602 - Other Materials- Structure & Phase Studies