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Proceedings Paper

Development and fabrication of a hybrid holographic solar concentrator for concurrent generation of electricity and thermal utilization
Author(s): Klaus Froehlich; Ernst Ulrich Wagemann; B. Frohn; Jochen Schulat; Christo G. Stojanoff
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Paper Abstract

The efficiency of photovoltaic generators that are based on different semiconductor materials with optimized band-gaps can achieve considerably higher values than those obtained from single junction devices, e.g. Si-based solar cells. Hence, the splitting of the solar spectrum for use with the different band-gap cells is a desired characteristic of the solar collector. An enhanced efficiency is realized with the concentration of the incident solar radiation onto the corresponding solar cell. The optical characteristics of the holographic solar concentrator satisfy these requirements. The undiffracted solar radiation should be collected by an absorber that also cools the solar cells. This is the concept of the hybrid collector for electricity and thermal utilization that is presented in this paper. It can achieve an electrical efficiency above 22% and a thermal efficiency of 35% with a temperature of 100 degree(s)C.

Paper Details

Date Published: 22 October 1993
PDF: 9 pages
Proc. SPIE 2017, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XII, (22 October 1993); doi: 10.1117/12.161971
Show Author Affiliations
Klaus Froehlich, Technical Univ. of Aachen (Germany)
Ernst Ulrich Wagemann, Technical Univ. of Aachen (Germany)
B. Frohn, Technical Univ. of Aachen (Germany)
Jochen Schulat, Technical Univ. of Aachen (Germany)
Christo G. Stojanoff, Technical Univ. of Aachen (Germany)

Published in SPIE Proceedings Vol. 2017:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XII
Carl M. Lampert, Editor(s)

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