文献类型：期刊文献

英文题名：High performance solid-state dye-sensitized solar cells based on organic blue-colored dyes

作者：Shen, Zhongjin[1];Xu, Bo[2];Liu, Peng[3];Hu, Yue[4];Yu, Ying[1];Ding, Haoran[1];Kloo, Lars[3];Hua, Jianli[1];Sun, Licheng[2,5];Tian, He

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]KTH Royal Inst Technol, Dept Chem Chem Sci & Engn, Ctr Mol Devices, Organ Chem, SE-10044 Stockholm, Sweden;[3]KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, Appl Phys Chem, Teknikringen 30, SE-10044 Stockholm, Sweden;[4]Huazhong Univ Sci & Technol, WNLO, 1037 Luoyu Rd, Wuhan 430074, Hubei Province, Peoples R China;[5]DUT, DUT KTH Joint Res Ctr Mol Devices, State Key Lab Fine Chem, Dalian 116024, Peoples R China

年份：2017

卷号：5

期号：3

起止页码：1242

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20170503294548);WOS:【SCI-EXPANDED(收录号:WOS:000394430800045)】；

基金：For financial support of this research, we thank the NSFC/China (21421004, 21372082, 21572062, and 91233207), the National Basic Research 973 Program (2013CB733700) and the Programme of Introducing Talents of Discipline to Universities (B16017). This work was also financially supported by the Swedish Research Council, the Swedish Energy Agency, and the Knut and Alice Wallenberg Foundation.

语种：英文

外文关键词：Dyes - Dye-sensitized solar cells - Efficiency

摘要：The development of novel photosensitizers with very high molar extinction coefficients and broad absorption spectra to enhance the light harvesting efficiency providing high PCEs for solid state dye sensitized solar cells (sDSCs) is a main target for improvement. In this work, two novel organic bluecolored dyes termed S4 and S5 with indeno[1,2-b] thiophene functionalized triphenylamine as the donor, 2,3-diphenylpyrido[3,4-b] pyrazine (PP) or 2,3-diphenylquinoxaline (QT) as the auxiliary acceptor and cyclopentadithiophene (CPDT) as the p-linker were designed and synthesized for sDSCs. S5 containing the QT unit as the electron-withdrawing group exhibits a high molar extinction coefficient of 6.3 x 10(4) M-1 cm(-1) at 600 nm. Most importantly, the S5-based sDSCs shows record PCEs of 7.81% and 8.25% under one sun and 0.5 sun light intensities, respectively, exceeding the PCE of LEG4-based solar cells (7.34%). To the best of our knowledge, this is the first case where an organic blue-colored dye displays a PCE over 7.8% in sDSCs, thus representing record efficiencies for sDSCs. These results clearly show that molecular engineering is a viable way to develop blue-colored dyes with high molar extinction coefficients for use in highly efficient sDSCs. Also, blue-colored dyes open up co-sensitization strategies in combination with traditional organic dyes with yellow-red colours.