Thin film cadmium telluride, zinc telluride, and mercury zinc telluride solar cells. Final subcontract report, 1 July 1988--31 December 1991

Technical Report · Wed Apr 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10146244· OSTI ID:10146244

Chu, T L ^[1]

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1. University of South Florida, Tampa, FL (United States)

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., Golden, CO (United States); University of South Florida, Tampa, FL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 10146244
• Report Number(s): NREL/TP--413-4791; ON: DE92001237
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501
36 MATERIALS SCIENCE
360601
360602
360606
CADMIUM TELLURIDE SOLAR CELLS
CADMIUM TELLURIDES
CHEMICAL VAPOR DEPOSITION
ELECTRICAL PROPERTIES
ENERGY LEVELS
MATERIALS
MERCURY TELLURIDES
MICROSTRUCTURE
OPTICAL PROPERTIES
PHOTOVOLTAIC CONVERSION
PHYSICAL PROPERTIES
PREPARATION AND MANUFACTURE
PROGRESS REPORT
QUANTUM EFFICIENCY
RESEARCH PROGRAMS
STRUCTURE AND PHASE STUDIES
SUBLIMATION
THIN FILMS
ZINC TELLURIDES