Fabricating high-concentration GaAs cell photovoltaic modules
This program comprises the design and manufacture of components of a GaAs-cell, passively-cooled concentrator. A Fresnel lens, 5.44-inches square, was used in conjunction with a solid glass, domed-top secondary optical element to concentrate the light on single-junction GaAs cells. The cell had an active area 0.2 inches in diameter and was soldered directly to the copper heatspreader. The heatspreader was bonded with heat-conductive RTV to an aluminum dissipator, which formed the module housing. The module was designed to be attached to a tracker at the center. Obtained were 26% cell efficiency in flash tests and 19.2% combined lens/cell efficiency outdoors. Optical transmission was lower than expected due to higher than expected losses in the secondary. The secondaries were made using a molding technique applicable to mass production.
- Research Organization:
- Varian Associates, Inc., Palo Alto, CA (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5830944
- Report Number(s):
- SAND-85-7021; ON: DE86011705
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
COMPUTERIZED SIMULATION
CONCENTRATOR SOLAR CELLS
DIRECT ENERGY CONVERTERS
EFFICIENCY
EQUIPMENT
FABRICATION
FRESNEL LENS
GALLIUM ARSENIDE SOLAR CELLS
HEAT SINKS
LENSES
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SIMULATION
SINKS
SOLAR CELLS
SOLAR EQUIPMENT