Thin film CuInSe/sub 2//Cd(Zn)S heterojunction solar cell: characterization and modeling
The results of experimental measurements and characterization of high efficiency, thin film CuInSe/sub 2//Cd(Zn)S solar cells provided by Boeing are reported. These devices are produced by elemental evaporation; they have very high I/sub SC/ but lower than expected V/sub OC/ and FF. An automated, multi-purpose experimental station was developed which can carry out capacitance, current, spectral response measurements as a function of voltage, frequency, wavelength, light bias intensity and temperature. The device is modeled as a p-i-n heterojunction where the interface largely determines the device properties and transport. Long time constants of capacitance transients were observed as light or voltage bias was changed. From such transient data it is deduced that a bulk deep level hole trap exists in the selenide which has a density nearly the same as the free carrier density. It was also observed that the photocurrent is strongly bias dependent in violation of the superposition principle. It is shown, by using chopped light data of collection efficiency and the dark I-V, that the light diode can be fully explained on the basis of a voltage.
- Research Organization:
- Drexel Univ., Philadelphia, PA (USA)
- OSTI ID:
- 6980750
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM COMPOUNDS
ELECTRICAL PROPERTIES
CADMIUM SULFIDE SOLAR CELLS
EFFICIENCY
COPPER COMPOUNDS
COPPER SELENIDE SOLAR CELLS
INDIUM COMPOUNDS
INDIUM SELENIDE SOLAR CELLS
SELENIDES
SULFIDES
ZINC COMPOUNDS
ZINC SULFIDE SOLAR CELLS
EXPERIMENTAL DATA
HETEROJUNCTIONS
INTERFACES
LIGHT SCATTERING
MATHEMATICAL MODELS
PHOTOCURRENTS
RADIANT FLUX DENSITY
TEMPERATURE DEPENDENCE
THIN FILMS
CHALCOGENIDES
CURRENTS
DATA
DIRECT ENERGY CONVERTERS
ELECTRIC CURRENTS
EQUIPMENT
FILMS
FLUX DENSITY
INFORMATION
JUNCTIONS
NUMERICAL DATA
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
SCATTERING
SELENIUM COMPOUNDS
SEMICONDUCTOR JUNCTIONS
SOLAR CELLS
SOLAR EQUIPMENT
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
140501* - Solar Energy Conversion- Photovoltaic Conversion