%0 Journal Article
%A Bittkau, K.
%A Kirchartz, T.
%A Rau, U.
%T Optical design of spectrally selective interlayers for perovskite/silicon heterojunction tandem solar cells
%J Optics express
%V 26
%N 18
%@ 1094-4087
%C Washington, DC
%I Soc.
%M FZJ-2018-04529
%P A750-A760
%D 2018
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:30184834
%U <Go to ISI:>//WOS:000443431400004
%R 10.1364/OE.26.00A750
%U https://juser.fz-juelich.de/record/850751