Benzo[1,2-b:4,5-b鈥瞉dithiophene and benzotriazole based small molecule for solution-processed organic solar cells

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• 作者：Yanhua Chen ; Zhengkun Du ; Weichao Chen ; Qian Liu ; Liang Sun ; Mingliang Sun ; Renqiang Yang
• 关键词：Small molecule ; Solution-processed ; High open-circuit voltage ; Organic solar cells ; Benzo[1 ; 2-b ; 4 ; 5-b&prime ; ]dithiophene ; Benzotriazole
• 刊名：Organic Electronics
• 出版年：February, 2014
• 年：2014
• 卷：15
• 期：2
• 页码：405-413
• 全文大小：1915 K

文摘

A novel deep HOMO A₁-蟺-A₂-D-A₂-蟺-A₁ type molecule (D(CATBTzT)BDT), which terminal electron-withdrawing octyl cyanoacetate group is connected to a benzo[1,2-b:4,5-b鈥瞉dithiophene (BDT) core through another electron-accepting benzotriazole block, has been synthesized, characterized, and employed as electron donor material for small molecule organic solar cells (SM-OSCs). By simple solution spin-coating fabrication process, D(CATBTzT)BDT/PC₆₁BM based OSCs exhibit a power conversion efficiency (PCE) of 3.61% with a high open-circuit voltage of 0.93 V. The D(CATBTzT)BDT based solar cells device also can show high FF of 72% with PCEs of 2.31% which is one of the best FF results for solution-processed SM-OSCs.