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000011279 1001_ $$0P:(DE-HGF)0$$aRockstuhl, C.$$b0
000011279 245__ $$aThe impact of intermediate reflectors on light absorption in tandem solar cells with randomly textured surfaces
000011279 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2009
000011279 300__ $$a211101
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000011279 440_0 $$0562$$aApplied Physics Letters$$v94$$x0003-6951$$y21
000011279 500__ $$aWe acknowledge the partial financial support of this work by the Deutsche Forschungsgemeinschaft (Grant No. PAK88) and the Federal Ministry of Education and Research (Nanovolt). We thank J. Hupkes for providing us with the samples for this study. Parts of computations were performed on the IBM p690 cluster JUMP of the JvN Forschungszentrum Julich, Germany and supported by VSR Project No. 3035.
000011279 520__ $$aThe impact of dielectric intermediate reflectors on the light absorption in the top cell of an a-Si:H/mu c-Si:H tandem solar cell comprising randomly textured surfaces was investigated by rigorous diffraction theory. Despite the strong light scattering, we found Fabry-Perot oscillations for the absorption with a decreasing modulation for an increasing thickness of the intermediate layer, a larger oscillation period when compared to thin films and a homogenization of the absorption profile. Optimized intermediate reflectors generate an absorption enhancement in the a-Si:H film, which varies between a factor of 2 and more than 3 for wavelengths of strong and weak absorption, respectively.
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000011279 65320 $$2Author$$alight absorption
000011279 65320 $$2Author$$arefractive index
000011279 65320 $$2Author$$asilicon
000011279 65320 $$2Author$$asolar cells
000011279 650_7 $$2WoSType$$aJ
000011279 7001_ $$0P:(DE-HGF)0$$aLederer, F.$$b1
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