Solar cell with extremely thin absorber on highly structured substrate
作者： K Ernst , A Belaidi , R K nenkamp
DOI: 10.1088/0268-1242/18/6/314
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摘要: We report the optical, structural and photovoltaic properties of an extremely-thin-absorber (eta) solar cell on highly porous TiO2 substrates. Nano-crystalline absorber layers with a local thickness only 150 nm have been prepared. This small allows good carrier collection even for material poor transport properties. The morphology structured substrate produces strong internal light scattering, resulting in enhancement optical path length by factor 5. With thick CdTe layers, eta cells produce open-circuit voltage 0.67 V short-circuit current 8.9 mA cm−2 100 mW illumination. Alloying Hg improves to 15 cm−2.
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