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Proceedings Paper

Optical modeling of spectrally selective reflectors based on TiO2:Nb transparent conducting oxide films for silicon solar cell applications
Author(s): C. M. Maghanga; G. A. Niklasson; C. G. Granqvist; M. Mwamburi
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Paper Abstract

A spectrally selective reflector (SSR) can be fabricated by depositing a transparent conducting oxide on a reflective substrate. SSRs can be incorporated in concentrating solar cells in order to minimize the heating. We deposited TiO2:Nb thin films on glass by DC magnetron sputtering, extracted optical constants, and used those to model an optimized SSR. Corresponding films were then successfully produced. The best wavelength-integrated reflectance values were 79 % and 31 % in the ranges 300 < λ < 1100 nm and 1100 < λ < 2500 nm, respectively. These data are better than those previously achieved using SnO2:F.

Paper Details

Date Published: 20 August 2009
PDF: 6 pages
Proc. SPIE 7407, High and Low Concentrator Systems for Solar Electric Applications IV, 74070F (20 August 2009); doi: 10.1117/12.826304
Show Author Affiliations
C. M. Maghanga, Uppsala Univ. (Sweden)
G. A. Niklasson, Uppsala Univ. (Sweden)
C. G. Granqvist, Uppsala Univ. (Sweden)
M. Mwamburi, Moi Univ. (Kenya)

Published in SPIE Proceedings Vol. 7407:
High and Low Concentrator Systems for Solar Electric Applications IV
Lori E. Greene, Editor(s)

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