Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
79695 | Solar Energy Materials and Solar Cells | 2009 | 4 Pages |
Abstract
In thin-film silicon tandem solar cells consisting of amorphous and microcrystalline silicon, efficiency enhancements can be achieved by increasing the current density in the a-Si:H top cell. Therefore, it is necessary to provide an optimized current matching at high current densities for both junctions. We present a numerical method to obtain suitable intermediate reflections achieving optimal current-matched tandem cells. We used idealized and measured reflection spectra of spectrally-selective intermediate filters for the current matching. For the optical design of such intermediate reflective layers a prediction of the spectral properties towards optimal current matching is presented.
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Authors
A. Bielawny, J. Üpping, R.B. Wehrspohn,