文献类型：期刊文献

英文题名：New Organic Donor-Acceptor-p-Acceptor Sensitizers for Efficient Dye-Sensitized Solar Cells and Photocatalytic Hydrogen Evolution under Visible-Light Irradiation

作者：Li, Xing[1];Cui, Shicong[1];Wang, Dan[1];Zhou, Ying[1];Zhou, Hao[1];Hu, Yue[2];Liu, Jin-gang[1];Long, Yitao[1];Wu, Wenjun[1];Hua, Jianli[1];Tian, He[1]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

年份：2014

卷号：7

期号：10

起止页码：2879

外文期刊名：CHEMSUSCHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000342815400017)】；

基金：This work was supported by the NSFC/China (2116110444, 21172073, 91233207 and 21372082) and the National Basic Research 973 Program (2013CB733700).

语种：英文

外文关键词：donor-acceptor systems; dyes; pigments; photochemistry; sensitizers; solar cells

摘要：Two organic donor-acceptor--acceptor (D-A--A) sensitizers (AQ and AP), containing quinoxaline/pyrido[3,4-b]pyrazine as the auxiliary acceptor, have been. Through fine-tuning of the auxiliary acceptor, a higher designed and synthesized photoelectric conversion efficiency of 6.02% for the AQ-based dye-sensitized solar cells under standard global AM1.5 solar conditions was achieved. Also, it was found that AQ-Pt/TiO2 photocatalysts displayed a better rate of H-2 evolution under visible-light irradiation (420nm<<780nm) because of the stability of the oxidized states and the lower rates of electron recombination. Importantly, sensitizers AQ and AP-Pt/TiO2 showed strong photocatalytic activity during continuous light soaking for 10h with methanol as the sacrificial electron donor. Additionally, the processes of their intermolecular electron transfer were further investigated theoretically by using time-dependent DFT. The calculated results indicate that the auxiliary acceptor plays the role of an electron trap and results in broad spectral responses.