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Proceedings Paper

Spectrally selective intermediate reflectors for tandem thin-film silicon solar cells
Author(s): A. Hoffmann; U. W. Paetzhold; T. Merdzhanova; A. Lambertz; O. Höhn; C. Ulbrich; K. Bittkau; U. Rau
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Paper 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.

Paper Details

Date Published: 11 September 2013
PDF: 8 pages
Proc. SPIE 8823, Thin Film Solar Technology V, 882305 (11 September 2013); doi: 10.1117/12.2023648
Show Author Affiliations
A. Hoffmann, Forschungszentrum Jülich GmbH (Germany)
U. W. Paetzhold, Forschungszentrum Jülich GmbH (Germany)
T. Merdzhanova, Forschungszentrum Jülich GmbH (Germany)
A. Lambertz, Forschungszentrum Jülich GmbH (Germany)
O. Höhn, Fraunhofer-Institut für Solare Energiesysteme (Germany)
C. Ulbrich, Forschungszentrum Jülich GmbH (Germany)
K. Bittkau, Forschungszentrum Jülich GmbH (Germany)
U. Rau, Forschungszentrum Jülich GmbH (Germany)

Published in SPIE Proceedings Vol. 8823:
Thin Film Solar Technology V
Louay A. Eldada; Michael J. Heben, Editor(s)

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