Heteroleptic ruthenium antenna-dye for high-voltage dye-sensitized solar cells

被引:46
作者
Li, Jheng-Ying [1 ]
Chen, Chia-Yuan [1 ]
Chen, Jian-Ging [2 ]
Tan, Chun-Jui [1 ]
Lee, Kun-Mu [3 ]
Wu, Shi-Jhang [1 ]
Tung, Yung-Liang [3 ]
Tsai, Hui-Hsu [1 ]
Ho, Kuo-Chuan [2 ]
Wu, Chun-Guey [1 ]
机构
[1] Natl Cent Univ, Dept Chem, Jhongli 32001, Taiwan
[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
[3] Ind Technol Res Inst, Photovolta Technol Ctr, Hsinchu 31040, Taiwan
关键词
CHARGE-TRANSFER SENSITIZERS; HIGH-EFFICIENCY; COUMARIN-DYE; PHOTOVOLTAIC PERFORMANCE; ENERGY CONVERSION; LIGHT; RECOMBINATION; ABSORPTIVITY; COMPLEXES; ENHANCE;
D O I
10.1039/c0jm01418d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new ruthenium photosensitizer, coded CYC-B7, incorporating a bithienyl-carbazole antenna ligand was designed and prepared for improving the open-circuit voltage (V-oc) of a dye-sensitized solar cell (DSC) device. This new sensitizer displays the low energy MLCT transition band centered at 551 nm with a high molar absorption coefficient of 2.19 x 10(4) M-1 cm(-1). In addition, a simple approach to reduce the aggregation of bulky ruthenium dyes assembled onto the surface of TiO2 film is demonstrated. The cell based on this new heteroleptic ruthenium dye provides a high V-oc of 788 mV and an overall conversion efficiency (eta) of 8.96%. The functionality of carbazole in CYC-B7 resulting in the increases of the V-oc value of the corresponding device is verified by comparing with the performance of the DSC sensitized with a structurally similar dye without carbazole.
引用
收藏
页码:7158 / 7164
页数:7
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