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Proceedings Paper

Light Trapping In Solar Cells And Determination Of The Absorbed Energy By Calorimetry
Author(s): H. Kiess; R. Morf
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Paper Abstract

Light trapping plays an important role for solar cells prepared from materials having an indirect bandgap such as crystalline Si. Electronically the performance of a thin Si cell can be superior to that of a thick cell, however, it will absorb IR-light less efficiently than a thick cell. Therefore, in order to be able to profit from the higher electronic performance, one has to make a thin cell which absorbs IR-light equally well as a thick cell. For this purpose we propose a light trapping scheme based on diffraction optics. Rectangular submicron gratings with a period of 0.3 μm and a depth of less than 0.2 μm in SIPOS are shown to give optimum light trapping.

Paper Details

Date Published: 12 December 1989
PDF: 6 pages
Proc. SPIE 1149, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VIII, (12 December 1989); doi: 10.1117/12.962174
Show Author Affiliations
H. Kiess, Paul Scherrer Institut c/o Laboratories RCA Ltd (Switzerland)
R. Morf, Paul Scherrer Institut c/o Laboratories RCA Ltd (Switzerland)


Published in SPIE Proceedings Vol. 1149:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VIII
Claes-Goeran Granqvist; Carl M. Lampert, Editor(s)

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