Spectrally selective intermediate reflectors for tandem thin-film silicon solar cells

A. Hoffmann; U. W. Paetzhold; T. Merdzhanova; A. Lambertz; O. Höhn; C. Ulbrich; K. Bittkau; U. Rau

doi:10.1117/12.2023648

11 September 2013 Spectrally selective intermediate reflectors for tandem thin-film silicon solar cells

A. Hoffmann, U. W. Paetzhold, T. Merdzhanova, A. Lambertz, O. Höhn, C. Ulbrich, K. Bittkau, U. Rau

Proceedings Volume 8823, Thin Film Solar Technology V; 882305 (2013) https://doi.org/10.1117/12.2023648
Event: SPIE Solar Energy + Technology, 2013, San Diego, California, United States

Abstract

Thin–film silicon tandem solar cells consist of an amorphous silicon top cell and a microcrystalline silicon bottom cell stacked in series. In order to match the photocurrents of the top cell and the bottom cell, a proper photon management is essential. In this regard, we present the conceptual design and optical simulations of an intermediate reflector consisting of a stack of microcrystalline silicon oxide layers of different, alternating refractive indices. In contrast to 1–layer intermediate reflectors, the spectral and directional selectivity of these intermediate reflectors result in a gain for the top cell current while simultaneously increasing the charge carrier generation in the bottom cell.

Citation Download Citation

A. Hoffmann, U. W. Paetzhold, T. Merdzhanova, A. Lambertz, O. Höhn, C. Ulbrich, K. Bittkau, and U. Rau "Spectrally selective intermediate reflectors for tandem thin-film silicon solar cells", Proc. SPIE 8823, Thin Film Solar Technology V, 882305 (11 September 2013); https://doi.org/10.1117/12.2023648

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