Citation: Yun Wua, Xin Li. Effect of dihedral angle of bridge unit on the performance of dye-sensitized solar cell[J]. Chinese Chemical Letters, ;2016, 27(6): 927-932. doi: 10.1016/j.cclet.2016.04.010 shu

Effect of dihedral angle of bridge unit on the performance of dye-sensitized solar cell

Yun Wua ^a,c, ,
Xin Li ^b

a School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China;
b Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden;
c Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China

Received Date: 2 March 2016
Revised Date: 1 April 2016

In this work, we investigated the impact of bridge unit on their photo-physical and photovoltaic performance. Increased planarity of the dyes effectively extended the absorption, but reduces the efficiency. Interestingly we found that dyes with a thiophene conjugate unit showed inferior performance when compared with benzene. Theoretical computation indicates a large dihedral angle in the latter system. EIS analysis evidenced the severe recombination in the thiophene-based dye, showing that good planarity may lead to dye aggregation and decrease the efficiency.
- Planarity,
- Recombination,
- Dihedral angle,
- Dye-loading,
- Solar cell
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