title: Transparent nickel selenide alloy counter electrodes for bifacial dye-sensitized solar cells exceeding 10% efficiency.
abstract: In the current work, we report a series of bifacial dye-sensitized solar cells (DSSCs) that provide power conversion efficiencies of more than 10% from bifacial irradiation. The device comprises an N719-sensitized TiO2 anode, a transparent nickel selenide (Ni-Se) alloy counter electrode (CE), and liquid electrolyte containing I(-)/I3(-) redox couples. Because of the high optical transparency, electron conduction ability, electrocatalytic activity of Ni-Se CEs, as well as dye illumination, electron excitation and power conversion efficiency have been remarkably enhanced. Results indicate that incident light from a transparent CE has a compensation effect to the light from the anode. The impressive efficiency along with simple preparation of the cost-effective Ni-Se alloy CEs highlights the potential application of bifacial illumination technique in robust DSSCs.
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, P.R. China. tangqunwei@ouc.edu.cn yuyan@ouc.edu.cn.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Duan
authors.forename: Qunwei
authors.initials: Q
authors.lastname: Tang
authors.forename: Benlin
authors.initials: B
authors.lastname: He
authors.forename: Ru
authors.initials: R
authors.lastname: Li
authors.forename: Liangmin
authors.initials: L
authors.lastname: Yu