title: Multi-scale and angular analysis of ray-optical light trapping schemes in thin-film solar cells: micro lens array, V-shaped configuration, and double parabolic trapper.
abstract: An efficient light trapping scheme is a key to enhancing the power conversion efficiency (PCE) of thin-film photovoltaic (PV) cells by compensating for the insufficient light absorption. To handle optical components from nano-scale to micro-scale seamlessly, a multi-scale optical simulation is carefully designed in this study and is used to qualitatively analyze the light trapping performances of a micro lens array (MLA), a V-shaped configuration, and the newly proposed scheme, which is termed a double parabolic trapper (DPT) according to both daily and annual movement of the sun. DPT has the potential to enhance the PCE significantly, from 5.9% to 8.9%, for PCDTBT:PC(70)BM-based polymer solar cells by perfectly trapping the incident light between two parabolic PV cells.
authors.affiliation: Graduate School of Energy, Environment, Water, and Sustainability, Graphene Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701 Korea.
authors.forename: Changsoon
authors.initials: C
authors.lastname: Cho
authors.forename: Jung-Yong
authors.initials: JY
authors.lastname: Lee