Efficient dye-sensitized solar cells with [copper(6,6′-dimethyl-2,2′-bipyridine)2]2+/1+ redox shuttle

Jiajia Li; Xichuan Yang; Ze Yu; Gagik G. Gurzadyan; Ming Cheng; Fuguo Zhang; Jiayan Cong; Weihan Wang; Haoxin Wang; Xiaoxin Li; Lars Kloo; Mei Wang; Licheng Sun

doi:10.1039/C6RA25676G

Efficient dye-sensitized solar cells with [copper(6,6′-dimethyl-2,2′-bipyridine)₂]^2+/1+ redox shuttle†

Jiajia Li,‡^a Xichuan Yang,

‡*^a Ze Yu,^a Gagik G. Gurzadyan,^a Ming Cheng,

^b Fuguo Zhang,^a Jiayan Cong,^c Weihan Wang,^a Haoxin Wang,^a Xiaoxin Li,^a Lars Kloo,^c Mei Wang^a and Licheng Sun^ab

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* Corresponding authors

^a State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, China
E-mail: yangxc@dlut.edu.cn

^b Organic Chemistry, Center of Molecular Devices, Department of Chemistry, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Teknikringen 30, SE-10044, Stockholm, Sweden

^c Applied Physical Chemistry, School of Chemical Science and Engineering, Department of Chemistry KTH Royal Institute of Technology, Teknikringen 30, SE-100 44 Stockholm, Sweden

Abstract

The [copper(6,6′-dimethyl-2,2′-bipyridine)₂]^2+/1+ ([Cu(dmbp)₂]^2+/1+) redox couple, which possesses a distorted tetragonal geometry of a Cu(I) complex crystal and a distorted tetrahedral coordination geometry of Cu(II) complex crystal, has been developed as a redox mediator in dye-sensitized solar cells (DSSCs). The energy of loss for dye regeneration was reduced with a very low but sufficient driving force of only 0.11 eV. A distinct increase in open-circuit voltage (V_OC) was achieved and a remarkable power conversion efficiency of 10.3% was afforded at 100 mW cm⁻² under AM 1.5G condition.

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Efficient dye-sensitized solar cells with [copper(6,6′-dimethyl-2,2′-bipyridine)₂]^2+/1+ redox shuttle†

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Efficient dye-sensitized solar cells with [copper(6,6′-dimethyl-2,2′-bipyridine)₂]^2+/1+ redox shuttle

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