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Proceedings Paper

"Optical matching system" of space silicon solar cells
Author(s): Weijia Zhu; Yiming Xi; Zhenglei Xi
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Paper Abstract

According to the optical electromagnetic theory, this paper demonstrates that we should not apply the usual simplified theoretical formulas of transparent dielectric (such as glass) to design semiconductor (Si) cell antireflection (AR) films. We must consider the macroscopic optical properties of semiconductor itself. We have deduced a strict formula for wide band three-layer AR coatings on semiconductor (Si) cell. By this formula, we can calculate the 'theoretical reflectance' of solar cells at any film thickness and wavelength. We have screened some type of double-layer film that increased the current gain of space solar cell effectively. For outerspace solar cells, it is necessary to have an 'optical matching system,' which is made up several layers of transparent material: AR coatings of silicon, silicon rubber adhesive and anti-radiation cover glass. For the solar cell with 'optical matching system,' we have also formulated its total reflectance Rt as a function of the reflectance Rm from AR film upon silicon, the index of refraction of cover glass ng, the index of refraction of silicon rubber adhesive nj, the transmittance of the upper surface of glass T.Rt has a parabolic type of T.

Paper Details

Date Published: 20 February 1998
PDF: 4 pages
Proc. SPIE 3175, Third International Conference on Thin Film Physics and Applications, (20 February 1998); doi: 10.1117/12.300643
Show Author Affiliations
Weijia Zhu, Shanghai Institute of Ceramics (China)
Yiming Xi, Shanghai Institute of Ceramics (China)
Zhenglei Xi, Shanghai Institute of Space Power (China)

Published in SPIE Proceedings Vol. 3175:
Third International Conference on Thin Film Physics and Applications
Shixun Zhou; Yongling Wang; Yi-Xin Chen; Shuzheng Mao, Editor(s)

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