A propeller-shaped perylene diimide hexamer as a nonfullerene acceptor for organic solar cells

被引：26
作者：
Liu, Juncheng [1 ]
Xie, Sufei [1 ]
Feng, Shiyu [1 ]
Li, Miao [1 ]
Wu, Liangliang [1 ]
Xu, Xinjun [1 ]
Chen, Xuebo [1 ]
Li, Cuihong [1 ]
Bo, Zhishan [1 ]
机构：
[1] Beijing Normal Univ, Beijing Key Lab Energy Convers & Storage Mat, Coll Chem, Beijing 100875, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 35期
基金：
北京市自然科学基金;
关键词：
SMALL-MOLECULE ACCEPTORS; NON-FULLERENE ACCEPTORS; ELECTRON-ACCEPTORS; POLYMER; EFFICIENCY; BISIMIDE; GENERATION; MORPHOLOGY; GEOMETRY; ENABLES;
D O I：
10.1039/c8tc03081b
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel propeller-shaped molecule (HPB-PDI6) with a hexaphenylbenzene (HPB) core and six peripheral PDI units was synthesized via Co-2(CO)(8)-catalyzed cyclotrimerization and used as an acceptor for organic solar cells (OSCs). The intriguing geometry of the HPB core and the spatial repulsion of the PDI rings created a twisted three-dimensional propeller-shaped conformation for HPB-PDI6. The propeller-shaped conformation could prevent the acceptor molecules from forming large aggregates in the active layer. As expected, the PTB7-Th:HPB-PDI6 blend films show a favorable morphology as well as high and balanced charge carrier mobility. Devices based on PTB7-Th:HPB-PDI6 achieved a PCE of 6.63% with a V-oc of 0.92 V, a J(sc) of 15.11 mA cm(-2), and an FF of 48.0%. Our results have demonstrated that the easily prepared propeller-shaped HPB-PDI6 could be a promising acceptor for high efficiency organic solar cells.
引用
收藏
页码：9336 / 9340
页数：5
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