STUDY OF A THERMOPHOTOVOLTAIC CONVERTER.
Abstract
Convective and radiative loss measurements were refined on a model TPV system using a calorimeter in vacuum and air. The system has an inner cylindrical mantle (3.75-cm radius) heated internally by conventional fuels, a concentric photocell mount (12.5-cm radius), and reflecting end-mirrors. Power losses in the model system were 0.3 kw to the bottom mirror and 0.4 kw to the top (in vacuum), with additional losses in air (convective losses) of 0.07 kw to the bottom, 0.25 kw to the cylinder, and 0.3 kw to the top. Sample studies showed that highly reflecting ohmic contacts can be produced with a resistance of 0.001 ohm/sq. cm. on p-type, and 0.1 ohm/sq. cm. on lightly doped n-type. Additional cells of the 'non-absorptive' type were produced. Wafers prepared under similar conditions were anti-reflection-coated on both surfaces for maximum transmission at 2.35 microns. The oneway absorption was found to be 3.4%. The devices performed as well or better than the earlier ones. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0462029