文献类型：期刊文献

英文题名：Efficient and stable dye-sensitized solar cells based on phenothiazine sensitizers with thiophene units

作者：Wu, Wenjun;Yang, Jiabao;Hua, Jianli[1];Tang, Jin;Zhang, Lei;Long, Yitao;Tian, He

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

年份：2010

卷号：20

期号：9

起止页码：1772

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY

收录：;EI(收录号：20100812727426);WOS:【SCI-EXPANDED(收录号:WOS:000274581000022)】；

基金：This work was supported by NSFC/China (20772031), the National Basic Research 973 Program (2006CB806200) and the Scientific Committee of Shanghai.

语种：英文

外文关键词：Incident light - Insecticides - Dyes - Thiophene - Heterojunctions - Conversion efficiency

摘要：Three new phenothiazine organic dyes containing thiophene, 3-(5-(3-(4-(bis(4-methoxy phenyl) amino)phenyl)-10-octyl-10H-phenothiazin-7-yl)thiophen-2-yl)-2-cyanoacrylic acid (P1), 3-(5-(3-(4-(diphenylamino)phenyl)-10-octyl-10H-phenothiazin-7-yl)thiophen-2-yl)-2-cyanoacrylic acid (P2) and 2-cyano-3-(5-(10-octyl-3-(4-(2,2-diphenylvinyl)phenyl)-10H-phenothiazin-7-yl)thiophen-2-yl) acrylic acid (P3) were designed and synthesized as sensitizers for application in dye-sensitized solar cells (DSSCs). For these dyes, the phenothiazine derivative moiety and the cyanoacetic acid take the roles of electron donor and electron acceptor, respectively. The absorption spectra, electrochemical and photovoltaic properties of P1-P3 and the cell long-term stability were extensively investigated. It was found that HOMO and LUMO energy level tuning can be conveniently accomplished by alternating the donor moiety. The DSSCs based on dye P2 showed the best photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 84.9%, a short-circuit photocurrent density (J(sc)) of 10.84 mA cm(-2), an open-circuit photovoltage (V-oc) of 592 mV, and a fill factor (ff) of 0.69, corresponding to an overall conversion efficiency of 4.41% under standard global AM 1.5 solar light conditions. These results demonstrated that the DSSCs based on phenothiazine dyes could achieve both high performance and good stability.