Research on high-efficiency stacked multi-junction amorphous silicon alloy thin-film solar cells. Annual report, 11 October 1983-31 October 1984
This report describes research on high-efficiency, stacked, multijunction a-Si alloy thin-film solar cells during fiscal year 1984. During this period, two reactors were designed, built and operated. The first was capable of depositing a-Si layers on 100-cm/sup 2/ substrates. The second was a six-sector, rotary, plasma reactor, which permitted the growth of two complete p-i-n junctions on a substrate sequentially in separated sectors. This reactor was fully operational after one year, and a-Si:H films were grown in it. State-of-the-art, undoped, a-Si:H films were grown from SiH/sub 4/ and (SiH/sub 4/ + H/sub 2/) mixtures. Doped n- and p-type a-Si: H and a-(Si,C):H films were also grown, as were very high quality, a-(Si,Ge):H films, from (SiH/sub 4/ + GeH/sub 4/ + H/sub 2/) mixtures. During the first year, research concentrated on a-Si: H devices, and a 7.8% efficiency was achieved. The best short-circuit current was about 15 mA/cm/sup 2/; the best open-circuit voltage, 0.8; and the best fill factor, 71%. A proof-of-concept a-(Si,Ge):H cell was made, with 8 mA/cm/sup 2/, an open-circuit voltage of 0.57 V, and a fill factor of 0.43, for an efficiency (under ELH lamp) of 1.8%.
- Research Organization:
- Spire Corp., Bedford, MA (USA)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 5513157
- Report Number(s):
- SERI/STR-211-2730; ON: DE85012150
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ABSORPTION
AMORPHOUS STATE
CRYSTAL GROWTH
DATA
DEPOSITION
DESIGN
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
FILMS
HETEROJUNCTIONS
INFORMATION
JUNCTIONS
NUMERICAL DATA
P-N JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PRODUCTION
QUANTUM EFFICIENCY
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SILICON
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
THIN FILMS
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ABSORPTION
AMORPHOUS STATE
CRYSTAL GROWTH
DATA
DEPOSITION
DESIGN
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
FILMS
HETEROJUNCTIONS
INFORMATION
JUNCTIONS
NUMERICAL DATA
P-N JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PRODUCTION
QUANTUM EFFICIENCY
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SILICON
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
THIN FILMS