Research on Stable, High-Efficiency Amorphous Silicon Multijunction Modules, Semiannual Subcontract Report, 1 August 1989 - 31 January 1991
This report describes a contract to produce multijunction modules based entirely on amorphous silicon alloys, the modules having an aperture area of at least 900 cm{sup 2} and a stable, reproducible conversion efficiency of at least 6.5% after 600 hours of light exposure (air mass 1.5) at 50{degrees} C. The work focussed on (1) producing opto-electronic-grade amorphous silicon material for band gaps of about 1.7 and 1.9 eV by changing the hydrogen content in the film bonded to the silicon, (2) studying and obtaining data on the light stability of single-junction p-i-n solar cells with gaps of about 1.7 and 1.9 eV, and (3) analyzing losses in a silicon/silicon multijunction cell. We report new results on an indium tin oxide (ITO)/silver back contact and the deposition of granular tin oxide by atmospheric-pressure chemical vapor deposition. Progress toward module fabrication at the end of six months has been good, with the demonstration of 5.4% initial efficiency in a silicon/silicon multijunction submodule with an aperture area of 4620 cm{sup 2} and incorporating devices with 2nd-junction i-layer thicknesses of about 3500 {angstrom}. We also demonstrated a single-junction silicon submodule with an aperture area of 4620 cm{sup 2}, a thickness of about 3500 {angstrom}, and an initial efficiency of 6.5%. 4 refs., 39 figs., 5 tabs.
- 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:
- 5853935
- Report Number(s):
- SERI/TP-214-4292; ON: DE91002159
- Country of Publication:
- United States
- Language:
- English
Similar Records
Research on Stable, High-Efficiency Amorphous Silicon Multijunction Modules, Semiannual Subcontract Report, 1 January 1990 - 30 June 1991
Research on stable, high-efficiency amorphous silicon multijunction modules. Annual subcontract report, 1 December 1991--31 October 1992
Related Subjects
SOLAR CELLS
FABRICATION
AMORPHOUS STATE
CHEMICAL VAPOR DEPOSITION
EFFICIENCY
HYDROGEN
PHOTOVOLTAIC CONVERSION
PROGRESS REPORT
SILICON ALLOYS
TIN OXIDES
ALLOYS
CHALCOGENIDES
CHEMICAL COATING
CONVERSION
DEPOSITION
DIRECT ENERGY CONVERSION
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELEMENTS
ENERGY CONVERSION
EQUIPMENT
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SOLAR EQUIPMENT
SURFACE COATING
TIN COMPOUNDS
photovoltaics
solar cells
amorphous state
silicon
360601* - Other Materials- Preparation & Manufacture
140501 - Solar Energy Conversion- Photovoltaic Conversion