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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Hoffmann ; U. W. Paetzhold ; T. Merdzhanova ; A. Lambertz ; O. Höhn, et al.
Spectrally selective intermediate reflectors for tandem thin-film silicon solar cells
", Proc. SPIE 8823, Thin Film Solar Technology V, 882305 (September 11, 2013); doi:10.1117/12.2023648; http://dx.doi.org/10.1117/12.2023648