title: Above-11%-efficiency organic-inorganic hybrid solar cells with omnidirectional harvesting characteristics by employing hierarchical photon-trapping structures.
abstract: Hierarchical 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.
authors.affiliation: Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan, ROC.
authors.forename: Wan-Rou
authors.initials: WR
authors.lastname: Wei
authors.forename: Meng-Lin
authors.initials: ML
authors.lastname: Tsai
authors.forename: Shu-Te
authors.initials: ST
authors.lastname: Ho
authors.forename: Shih-Hsiang
authors.initials: SH
authors.lastname: Tai
authors.forename: Cherng-Rong
authors.initials: CR
authors.lastname: Ho
authors.forename: Shin-Hung
authors.initials: SH
authors.lastname: Tsai
authors.forename: Chee-Wee
authors.initials: CW
authors.lastname: Liu
authors.forename: Ren-Jei
authors.initials: RJ
authors.lastname: Chung
authors.forename: Jr-Hau
authors.initials: JH
authors.lastname: He