Polycrystalline Thin Film Materials and Devices, Annual Subcontract Report, 16 January 1991 - 15 January 1992
Results of Phase II of a research program on polycrystalline thin film heterojunction solar cells are presented. Relations between processing, materials properties and device performance were studied. The analysis of these solar cells explains how minority carrier recombination at the interface and at grain boundaries can be reduced by doping of windows and absorber layers, such as in high efficiency CdTe and CuInSe{sub 2} based solar cells. The additional geometric dimension introduced by the polycrystallinity must be taken into consideration. The solar cells are limited by the diode current, caused by recombination in the space charge region. J-V characteristics of CuInSe{sub 2}/(CdZn)S cells were analyzed. Current-voltage and spectral response measurements were also made on high efficiency CdTe/CdS thin film solar cells prepared by vacuum evaporation. Cu-In bilayers were reacted with Se and H{sub 2}Se gas to form CuInSe{sub 2} films; the reaction pathways and the precursor were studied. Several approaches to fabrication of these thin film solar cells in a superstrate configuration were explored. A self-consistent picture of the effects of processing on the evolution of CdTe cells was developed.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 7058963
- Report Number(s):
- NREL/TP-451-5094; ON: DE93000022
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CADMIUM SULFIDE SOLAR CELLS
CADMIUM TELLURIDE SOLAR CELLS
COPPER SELENIDE SOLAR CELLS
CRYSTALS
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTRICAL PROPERTIES
EQUIPMENT
FILMS
HETEROJUNCTIONS
INDIUM SELENIDE SOLAR CELLS
JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOELECTRIC EFFECT
PHOTOELECTROMAGNETIC EFFECTS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
POLYCRYSTALS
PROCESSING
PROGRESS REPORT
SEMICONDUCTOR JUNCTIONS
SOLAR CELLS
SOLAR EQUIPMENT
THIN FILMS
ZINC SULFIDE SOLAR CELLS
electronic devices
electronic materials
photovoltaics
polycrystalline
solar cells
thin films
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CADMIUM SULFIDE SOLAR CELLS
CADMIUM TELLURIDE SOLAR CELLS
COPPER SELENIDE SOLAR CELLS
CRYSTALS
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTRICAL PROPERTIES
EQUIPMENT
FILMS
HETEROJUNCTIONS
INDIUM SELENIDE SOLAR CELLS
JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOELECTRIC EFFECT
PHOTOELECTROMAGNETIC EFFECTS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
POLYCRYSTALS
PROCESSING
PROGRESS REPORT
SEMICONDUCTOR JUNCTIONS
SOLAR CELLS
SOLAR EQUIPMENT
THIN FILMS
ZINC SULFIDE SOLAR CELLS
electronic devices
electronic materials
photovoltaics
polycrystalline
solar cells
thin films