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Media type:
E-Article
Title:
Optical design of spectrally selective interlayers for perovskite/silicon heterojunction tandem solar cells
Contributor:
Bittkau, K.
[Author];
Kirchartz, T.
[Author];
Rau, U.
[Author]
Published:
Soc., 2018
Published in:Optics express 26(18), A750-A760 (2018). doi:10.1364/OE.26.00A750
Language:
English
DOI:
https://doi.org/10.1364/OE.26.00A750
ISSN:
1094-4087
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
Monolithic perovskite/c-Si tandem solar cells have the potential to exceed the Shockley-Queisser limit for single junction solar cells. However, reflection losses at internal interfaces play a crucial role for the overall efficiency of the tandem devices. Significant reflection losses are caused by the charge selective contacts which have a significantly lower refractive index compared to the absorber materials. Here, we present an approach to overcome a significant part of these reflection losses by introducing a multilayer stack between the top and bottom cell which shows spectrally selective transmission/reflection behavior. The layer stack is designed and optimized by optical simulations using transfer matrix method and a genetic algorithm. The incident sun light is split into a direct part and an isotropic diffuse part. The tandem solar cell with interlayer shows an absolute improvement of short-circuit current density of 0.82 mA/cm2.