文献类型：期刊文献

英文题名：Effect of bridging group configuration on photophysical and photovoltaic performance in dye-sensitized solar cells

作者：Wu, Zhifang[1,2];Li, Xin[3];Li, Jing[1,2];Agren, Hans[3];Hua, Jianli[1,2];Tian, He[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, PR, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, PR, Peoples R China;[3]KTH Royal Inst Technol, Sch Biotechnol, Div Theoret Chem & Biol, SE-10691 Stockholm, Sweden

年份：2015

卷号：3

期号：27

起止页码：14325

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20152701000488);WOS:【SCI-EXPANDED(收录号:WOS:000357257900034)】；

基金：This work is supported by the Science Fund for Creative Research Groups (21421004), the National Basic Research 973 Program (2013CB733700), and NSFC/China (21172073, 21372082 and 91233207).

语种：英文

外文关键词：Dyes - Efficiency - Optical properties - Photovoltaic effects - Solar cells - Solar power generation

摘要：Three new metal-free organic sensitizers with a D-A-p-A configuration based on a triarylamine donor, 2,1,3-benzothiadiazole (BTD) and different pi units have been synthesized. Because a long alkyl side chain has been attached to the thiophene adjacent to BDT, HECA achieves the best performance. Under standard global AM 1.5 solar light conditions, the HECA based-device gives the best conversion efficiency of 9.13% with a J(sc) of 16.14 mA cm(-2), a V-oc of 0.72 V and a FF of 0.77. Although EDCA displays superior optical properties, it does not give the desired results. The device based on EDCA achieves efficiency of 7.37% with a J(sc) of 15.56 mA cm(-2), a V-oc of 0.67 V and a FF of 0.70. EIS analysis confirms the existence of fast recombination in the EDCA system. Further computational analysis indicates that the coplanarity and the very strong affinity to iodine molecules of EDCA may be the origin of the low performance.