文献类型：期刊文献

英文题名：Organic sensitizers from D-π-A to D-A-π-A: effect of the internal electron-withdrawing units on molecular absorption, energy levels and photovoltaic performances

作者：Wu, Yongzhen;Zhu, Weihong[1]

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

年份：2013

卷号：42

期号：5

起止页码：2039

外文期刊名：CHEMICAL SOCIETY REVIEWS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000314701000008)】；

基金：This work was financially supported by NSFC/China, National 973 Program (2011CB808400), the Oriental Scholarship, SRFDP 200802510011, the Fundamental Research Funds for the Central Universities (WK1013002), and the Open Funding Project of State Key Laboratory of Luminescent Materials and Devices (SCUT).

语种：英文

摘要：The high performance and low cost of dye-sensitized solar cells (DSSCs) have drawn great interest from both academic and industrial circles. The research on exploring novel efficient sensitizers, especially on inexpensive metal-free pure organic dyes, has never been suspended. The donor-pi bridge-acceptor (D-pi-A) configuration is mainstream in the design of organic sensitizers due to its convenient modulation of the intramolecular charge-transfer nature. Recently, it has been found that incorporation of additional electron-withdrawing units (such as benzothiadiazole, benzotriazole, quinoxaline, phthalimide, diketopyrrolopyrrole, thienopyrazine, thiazole, triazine, cyanovinyl, cyano- and fluoro-substituted phenyl) into the pi bridge as internal acceptors, termed the D-A-pi-A configuration, displays several advantages such as tuning of the molecular energy levels, red-shift of the charge-transfer absorption band, and distinct improvement of photovoltaic performance and stability. We apply the D-A-pi-A concept broadly to the organic sensitizers containing additional electron-withdrawing units between electron donors and acceptors. This review is projected to summarize the category of pure organic sensitizers on the basis of the D-A-pi-A feature. By comparing the structure-property relationship of typical photovoltaic D-A-pi-A dyes, the important guidelines in the design of such materials are highlighted.