CHEE-WEE LIUWei, W.-R.W.-R.WeiTsai, M.-L.M.-L.TsaiHo, S.-T.S.-T.HoTai, S.-H.S.-H.TaiHo, C.-R.C.-R.HoTsai, S.-H.S.-H.TsaiLiu, C.-W.C.-W.LiuChung, R.-J.R.-J.ChungHe, J.-H.J.-H.HeCHEE-WEE LIU2018-09-102018-09-102013http://www.scopus.com/inward/record.url?eid=2-s2.0-84881580883&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/380234Hierarchical structures consisting of micropyramids and nanowires are used in Si/PEDOT:PSS hybrid solar cells to achieve a power conversion efficiency (PCE) up to 11.48% with excellent omnidirectionality. The structure provides a combined concepts of superior light trapping ability, significant increase of p-n junction areas, and short carrier diffusion distance, improving the photovoltaic characteristics including short-circuit current density, fill factor, and PCE. The enhancement of power generation is up to 253.8% at high incident angles, showing the outstanding omnidirectional operation ability of hybrid cells with hierarchical Si surfaces. This properly designed hierarchical-structured device paves a promising way for developing low-cost, high-efficiency, and omnidirectional solar applications in the future. © 2013 American Chemical Society.heterojunction; Hybrid solar cells; omnidirectionality; pγhoton management; Si[SDGs]SDG7Carrier diffusions; Hierarchical structures; Hybrid solar cells; Omnidirectionality; Organic-inorganic hybrid; Photovoltaic characteristics; Power conversion efficiencies; Solar applications; Heterojunctions; Nanowires; Silicon; Tracking (position); Solar cellsjournal article10.1021/nl401540h