STUDY OF A THERMOPHOTOVOLTAIC CONVERTER.
Quarterly progress rept. no. 3, 1 Sep-30 Nov 63,
GM DEFENSE RESEARCH LABS SANTA BARBARA CALIF
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Work continued on the experimental preparation of germanium photovoltaic cells. V-I measurements were made using the 2800 C tungsten lamp source, the tungsten lamp 1400 C-Simulator, and the SiC laboratory test burner at temperatures of about 1200 C. The relative energy distri bution in the image plane of the 1400 C-Simulator was determined. Theoretical studies were made on doping levels and optimum design configurations in relation to output power, temperature degradation of output power, and infrared absorption. The energy loss due to spacing gaps between cells was developed. The reflectance goniometer was completed and preliminary measurements taken. New samples have been fabricated for reflectance measurements vacuum-deposited gold and aluminum on polished fused silica and vacuum-deposited gold on polished germanium wafers. Materials of construction for the burner and heat exchanger have been investigated further. Design work has continued on the more conventional design and on a periodic-flow heat exchanger. A calorimeter has been remetallized with improved vacuum golddepositing techniques, and with it the gas-fired SiC mantle has been brought up to 1395 C. Author