STUDY OF GERMANIUM DEVICES FOR USE IN A THERMOPHOTOVOLTAIC CONVERTER.
Quarterly rept. no. 2, 1 Oct 65-1 Jan 66,
DELCO RADIO DIV GENERAL MOTORS CORP KOKOMO IND
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Studies were made of the effects of surface adsorbed moisture on the performance of uncoated N on P and P on N devices. A preliminary evaluation of the effect of donor concentration variations in the N layer of the P on N device was made. The evaluation of the optical and electrical properties of anti-reflection coated devices supplied by four firms was completed. A study of the effects of moisture on the performance of antireflection coated devices was initiated. The influence of a vacuum environment on device performance was determined in the case of both uncoated and anti-reflection coated devices. A model which explains the performance behavior of devices under the influence of various ambient environments was presented and verified experimentally. P on N non-absorptive devices were fabricated by epitaxial deposition in the close-spaced transport system. The highest power output observed was 250 milliwatts-device. The presence of very high reverse saturation current limits the open circuit voltage but the short circuit currents are comparable tho those obtained with absorptive devices. Author
- Electrical and Electronic Equipment
- Non-electrical Energy Conversion
- Coatings, Colorants and Finishes