Covalently Bound Clusters of Alpha-Substituted PDI—Rival Electron Acceptors to Fullerene for Organic Solar Cells

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• 作者：Qinghe Wu ; Donglin Zhao ; Alexander M. Schneider ; Wei Chen ; Luping Yu
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：June 15, 2016
• 年：2016
• 卷：138
• 期：23
• 页码：7248-7251
• 全文大小：292K
• 年卷期：0
• ISSN：1520-5126

文摘

A cluster type of electron acceptor, TPB, bearing four α-perylenediimides (PDIs), was developed, in which the four PDIs form a cross-like molecular conformation while still partially conjugated with the BDT-Th core. The blend TPB:PTB7-Th films show favorable morphology and efficient charge dissociation. The inverted solar cells exhibited the highest PCE of 8.47% with the extraordinarily high J_sc values (>18 mA/cm²), comparable with those of the corresponding PC₇₁BM/PTB7-Th-based solar cells.