Research on high-efficiency, single-junction, monolithic, thin-film amorphous silicon solar cells: Final technical report, February 1987
This report describes research on high-efficiency, single-junction, monolithic, thin-film amorphous silicon solar cells in five task areas: a-Si materials; nonsemiconductor materials; a-Si solar cells; monolithic, intraconnected cells and submodules; and multichamber deposition systems. Among many results, researchers found that good film properties can be obtained at a deposition rate of 8 A/s using a 33% silane-in-hydrogen mixture; low-level phosphorous-doped a-Si:H films exhibit no detectable degradation with light soaking; and the p-window structure appears to be more stable than the n-window structure. The performance of such top contacts as SnO/sub 2//ITO, Ag/ITO, and SnO/sub 2//Ag/SnO/sub 2/ was compared with that of single-layer ITO. A new web treatment system for a-Si solar cells was developed that reduces contamination from the web. Submodules with active areas of more than 70 cm/sup 2/ were produced with active-area efficiencies of more than 4%. The fabrication technique involved laser scribing, screen printing, vapor deposition, and laser heat treatments. A multichamber deposition system was also designed and constructed that deposited a-Si p-i-n and n-i-p layers on a flexible polyimide web in a continuous, roll-to-roll deposition process. 11 refs., 55 figs., 4 tabs.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA); Minnesota Mining and Mfg. Co., St. Paul (USA). Electronic and Information Sector Labs.
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 6833395
- Report Number(s):
- SERI/STR-211-3344; ON: DE88001177
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
AMORPHOUS STATE
DATA
DEPOSITION
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
EFFICIENCY
ENERGY LOSSES
EQUIPMENT
FABRICATION
FILMS
INFORMATION
JUNCTIONS
LOSSES
NUMERICAL DATA
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PROGRESS REPORT
SEMICONDUCTOR JUNCTIONS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SUBSTRATES
TESTING
THIN FILMS