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Peichen Yu, Meng-Yih Chiu, Chia-Hua Chang, Chung-Yu Hong, Yu-Lin Tsai, Hau-Vei Han and Yu-Rue Wu Towards high-efficiency multi-junction solar cells with biologically inspired nanosurfaces Progress in Photovoltaics: Research and Applications 22

Version of Record online: 2 AUG 2012 | DOI: 10.1002/pip.2259

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Biologically inspired antireflective structures are incorporated into a monolithically grown In0.5Ga0.5P/In0.01Ga0.99As/Ge triple-junction solar cell using scalable polystyrene nanosphere lithography. The subwavelength structures exhibit remarkable antireflection in the UV, which is hardly attainable with common thin-film coatings. Consequently, the nanostructured device shows omni-directional enhancement of photocurrent and power conversion efficiency because of alleviated current matching. A comprehensive design scheme is also developed to tailor the reflectance spectrum for maximum photocurrent output of tandem cells.

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