Electroabsorption and transport measurements and modeling in amorphous-silicon-based solar cells: Phase I technical progress report, 24 March 1998--23 March 1999
This report describes work done by the Syracuse University during Phase 1 of this subcontract. Researchers performed work in the following areas: (1) In ``Electroabsorption measurements and built-in potentials in a-Si:H-based solar cells and devices'', researchers obtained an estimate of Vbi = 1.17 V in cells with a-SiGe:H absorber layers from United Solar Systems Corp. (2) In ``Solar cell modeling employing the AMPS computer program'', researchers began operating a simple AMPS modeling site and explored the effect of conduction bandtail width on Voc computed analytical approximations and the AMPS program. The quantitative differences between the two procedures are discussed. (3) In ``Drift mobility measurements in a-Si:H made with high hydrogen dilution'', researchers measured electron and hole mobilities in several n/i/Ni (semitransparent) cells from Pennsylvania State University with a-Si absorber layers made under maximal hydrogen dilution and found a modest increase in hole mobility in these materials compared to conventional a-Si:H. (4) In ``Electroabsorption spectroscopy in solar cells'', researchers discovered and interpreted an infrared absorption band near 1.0 eV, which they believe is caused by dopants and defects at the n/i interface of cells, and which also has interesting implications for the nature of electroabsorption and for the doping mechanism in n-type material.
- Research Organization:
- National Renewable Energy Lab., Golden, CO (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC36-99GO10337
- OSTI ID:
- 754642
- Report Number(s):
- NREL/SR-520-27665
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
36 MATERIALS SCIENCE
AMORPHOUS SILICON
AMPS
CARRIER MOBILITY
COMPUTERIZED SIMULATION
ELECTRICAL PROPERTIES
ELECTROABSORPTION
GERMANIUM SILICIDES
HOLE MOBILITY
MATHEMATICAL MODELS
MODELING
OPTICAL PROPERTIES
PHOTOVOLTAICS
SILICON SOLAR CELLS
SOLAR ABSORBERS
SOLAR CELLS
TRANSPORT MEASUREMENTS
36 MATERIALS SCIENCE
AMORPHOUS SILICON
AMPS
CARRIER MOBILITY
COMPUTERIZED SIMULATION
ELECTRICAL PROPERTIES
ELECTROABSORPTION
GERMANIUM SILICIDES
HOLE MOBILITY
MATHEMATICAL MODELS
MODELING
OPTICAL PROPERTIES
PHOTOVOLTAICS
SILICON SOLAR CELLS
SOLAR ABSORBERS
SOLAR CELLS
TRANSPORT MEASUREMENTS