文献类型：期刊文献

英文题名：A new D-A-π-A type organic sensitizer based on substituted dihydroindolo [2,3-b] carbazole and DPP unit with a bulky branched alkyl chain for highly efficient DSCs

作者：Tian, Guojian[1,2];Cai, Shengyun[1,2];Li, Xin[3];Agren, Hans[3];Wang, Qiaochun[1,2];Huang, Jinhai[1,2];Su, Jianhua[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, 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：7

起止页码：3777

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20150700534317);WOS:【SCI-EXPANDED(收录号:WOS:000349447200066)】；

语种：英文

外文关键词：Polycyclic aromatic hydrocarbons - Dyes

摘要：Two new D-A-pi-A configuration metal-free organic sensitizers (T1-T2) based on 5,7-dihexyl-6,12-diphenyl-5,7-dihydroindolo[2,3-b]carbazole and a DPP unit with a bulky branched alkyl chain have been synthesized for dye-sensitized solar cells. Due to a bulky branched alkyl chain being attached to the donor and DPP unit, both compounds obtain high V-oc values. Under standard global AM 1.5 solar light conditions, the T1 based-device gives a high conversion efficiency of 8.24% with a J(sc) of 15.72 mA cm(-2), a V-oc of 0.74 V and a FF of 0.71. These excellent performances make the donor dihydroindolo[2,3-b] carbazole and DPP unit promising candidates for further application in DSCs.