Understanding the Halogenation Effects in Diketopyrrolopyrrole-Based Small Molecule Photovoltaics

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• 作者：Shi-Xin Sun ; Yong Huo ; Miao-Miao Li ; Xiaowen Hu ; Hai-Jun Zhang ; You-Wen Zhang ; You-Dan Zhang ; Xiao-Long Chen ; Zi-Fa Shi ; Xiong Gong ; Yongsheng Chen ; Hao-Li Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 16, 2015
• 年：2015
• 卷：7
• 期：36
• 页码：19914-19922
• 全文大小：469K
• ISSN：1944-8252

文摘

Two molecules containing a central diketopyrrolopyrrole and two oligothiophene units have been designed and synthesized. Comparisons between the molecules containing terminal F (FDPP) and Cl (CDPP) atoms allowed us to evaluate the effects of halogenation on the photovoltaic properties of the small molecule organic solar cells (OSCs). The OSCs devices employing FDPP:PC₇₁BM films showed power conversion efficiencies up to 4.32%, suggesting that fluorination is an efficient method for constructing small molecules for OSCs.