Nonplanar Organic Sensitizers Featuring a Tetraphenylethene Structure and Double Electron-Withdrawing Anchoring Groups

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• 作者：Fangshuai Zhang ; Jie Fan ; Huijuan Yu ; Zhuofeng Ke ; Changming Nie ; Daibin Kuang ; Guang Shao ; Chengyong Su
• 刊名：Journal of Organic Chemistry
• 出版年：2015
• 出版时间：September 18, 2015
• 年：2015
• 卷：80
• 期：18
• 页码：9034-9040
• 全文大小：374K
• ISSN：1520-6904

文摘

Two metal-free organic sensitizers containing two N,N-diethylaniline (DEA) moieties and a twisted 1,1,2,2-tetraphenylethene (TPE) structure, dye SD with one anchoring group and dye DD with two anchoring groups, were synthesized and applied in dye-sensitized solar cells (DSSCs). The introduction of a nonplanar TPE structure was used to form a series of propeller-like structures and reduce the tendency of dyes to randomly aggregate on TiO₂ surface, but without importing an aggregation-induced emission (AIE) property. The thermal stabilities, UV鈥搗is absorption spectra, electrochemical properties, and photovoltaic parameters of DSSCs with these two dyes were systematically studied and compared with each other. The overall conversion efficiencies (畏) of 4.56% for dye SD and 6.08% for dye DD were obtained under AM 1.5 G irradiation.