文献类型：期刊文献

英文题名：Highly efficient cosensitization of D-A-π-A benzotriazole organic dyes with porphyrin for panchromatic dye-sensitized solar cells

作者：Liu, Jingchuan[1,2];Liu, Bo[3];Tang, Yunyu[1,2];Zhang, Weiwei[1,2];Wu, Wenjun[1,2];Xie, Yongshu[1,2];Zhu, Wei-Hong[1,2]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Collaborat Innovat Ctr Coal Based Energy I CCE, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050023, Peoples R China

年份：2015

卷号：3

期号：42

起止页码：11144

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20154401473848);WOS:【SCI-EXPANDED(收录号:WOS:000363663100024)】；

基金：This work was supported by NSFC for Creative Research Groups (21421004) and Distinguished Young Scholars (21325625), NSFC/China, Oriental Scholarship, Fundamental Research Funds for the Central Universities (WJ1416005 and WJ1315025), Scientific Committee of Shanghai (14ZR1409700 and 15XD1501400), Science Foundation for the Excellent Youth Scholars of Hebei Education Department (Y2012017), and Science Foundation for Oversea Scholars of Hebei (C201400324).

语种：英文

外文关键词：Dye-sensitized solar cells - Efficiency - Titanium dioxide - Photovoltaic effects

摘要：Compared with the development of novel organic sensitizers, cosensitization is a much more convenient way to acquire panchromatic dye-sensitized solar cells (DSSCs). Taking the strong absorption in the long wavelength region but the lack of response in the ranges of 350-410 nm and 500-600 nm of porphyrin dyes into account, the D-A-pi-A benzotriazole organic dye (WS-5), showing strong absorption bands in these two ranges, is targeted for cosensitization with porphyrin dye XW4. The cosensitization effects on light-harvesting capability, photovoltaic performance, charge recombination as well as long-term stability have been investigated in detail, especially for the interactions between WS-5 and XW4 and their effects on photovoltaic performance. Noticeably, a strong panchromatic light response and a promising photovoltaic efficiency of 10.41% have been achieved with only 6 mm TiO2 films, which is obviously higher than the corresponding efficiencies obtained using a single sensitizer. The cosensitization is essentially dominated by WS-5 while only a small amount of XW4 is contributed to enhance the IPCE response in the long wavelength region. These results demonstrate the effective approach for utilizing porphyrin dyes to simultaneously fill up the absorption valleys of D-A-p-A featured sensitizers and promote the DSSC efficiency, presenting the effective strategy of cosensitization to combine the advantages of both porphyrin and organic dyes, especially for pursuing highly efficient panchromatic dye-sensitized solar cells.