A dual functional additive for the HTM layer in perovskite solar cells.
The ionic liquid N-butyl-N'-(4-pyridylheptyl)imidazolium bis(trifluoromethane)sulfonimide (BuPyIm-TFSI) was used as a dual-functional additive to improve the electrical properties of the hole-transporting material (HTM) for perovskite solar cells. BuPyIm-TFSI improved the conductivity of HTM and reduced the dark current of the solar cell simultaneously, thereby greatly increasing the power conversion efficiency.
State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology (DUT), 2 Linggong Rd., Dalian, 116024, P. R. China. tinglima@dlut.edu.cn shiyantao@dlut.edu.cn.
Hong
H
Zhang
Yantao
Y
Shi
Feng
F
Yan
Liang
L
Wang
Kai
K
Wang
Yujin
Y
Xing
Qingshun
Q
Dong
Tingli
T
Ma