标题：Ternary organic solar cells based on two compatible PDI-based acceptors with an enhanced power conversion efficiency
作者：Weng, Kangkang; Li, Chao; Bi, Pengqing; Ryu, Hwa Sook; Guo, Yikun; Hao, Xiaotao; Zhao, Dahui; Li, Weiwei; Woo, Han Young; Sun, Yanmi 更多 作者机构：[Weng, Kangkang; Li, Chao; Sun, Yanming] Beihang Univ, Sch Chem, Beijing 100191, Peoples R China.; [Li, Weiwei] Beijing Univ Chem Technol, State Key 更多
通讯作者：Li, Weiwei;Sun, YM;Li, WW
通讯作者地址：[Sun, YM]Beihang Univ, Sch Chem, Beijing 100191, Peoples R China;[Li, WW]Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 10 更多
来源：JOURNAL OF MATERIALS CHEMISTRY A
摘要：Ternary solar cells have been proven to be an effective way to increase the power conversion efficiency (PCE) of organic solar cells (OSCs). Up to now, research effort has mostly focused on fullerene derivatives and acceptor-donor-acceptor (A-D-A) type non-fullerene acceptor-based ternary solar cells, while perylene diimide (PDI)-based ternary devices have been rarely studied. In this contribution, we introduced a new type of ternary solar cell based on a PDI-based small-molecule acceptor (PBI-Por) and a polymer donor (PTB7-Th) with a third PDI-based polymer acceptor (PDI-V). The introduction of PDI-V into the ternary blends not only broadens the absorption of blend films but also increases the electronmobilities. As a result, a high efficiency of 9.43% was obtained for the ternary OSC, which is 20% higher than that of the binaryOSC. Detailed studies indicate that PDI-V showed good compatibility with PBI-Por in the blend films, which demonstrates a promising way to fabricate high-performance PDI-based OSCs.