Role of Polycrystallinity in CdTe and CuInSe2 Photovoltaic Cells: Annual Subcontract Report, 1 April 1992 - 31 March 1993

Technical Report · Tue Feb 01 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10131204· OSTI ID:10131204

Sites, J. R.

This report describes work to conduct several investigations of thin-film polycrystalline solar cells. (1) An analysis of high-efficiency solar cells fabricated at the University of South Florida showed significant reduction in forward recombination current, and the cells were stable over a 3-month test period. (2) Transient voltage effects were documented in a large number of polycrystalline cells and were attributed to long-lived trapping states sensitive to voltage changes near one-half open-circuit voltage. (3) Collection efficiency and its voltage dependence were carefully calculated. The typical effect on photocurrent at operating voltages is about 2% for CuInSe{sub 2}, and less for other cells.

• 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: 10131204
• Report Number(s): NREL/TP-451-6215; ON: DE94000293; BR: WM1020000
• Resource Relation: Other Information: PBD: Feb 1994
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
SOLAR CELLS
ELECTRICAL PROPERTIES
PROGRESS REPORT
COPPER SELENIDE SOLAR CELLS
INDIUM SELENIDE SOLAR CELLS
CADMIUM TELLURIDE SOLAR CELLS
THIN FILMS
POLYCRYSTALS
EFFICIENCY
PHOTOVOLTAIC CONVERSION
GRADED BAND GAPS
ELECTRONIC STRUCTURE
photovoltaics
solar cells
copper indium diselenide
thin films
high efficiency
polycrystalline
140501
360602
STRUCTURE AND PHASE STUDIES