Novel spiro-based hole transporting materials for efficient perovskite solar cells.
Three spiro-acridine-fluorene based hole transporting materials (HTMs), namely CW3, CW4 and CW5, are employed in the fabrication of organic-inorganic hybrid perovskite solar cells. The corresponding mesoscopic TiO2/CH3NH3PbI3/HTM devices are investigated and compared with that made with commercial spiro-OMeTAD. The best conversion efficiency of 16.56% is achieved for CW4 in the presence of tBp and Li-TFSI as additives and without a cobalt dopant. The performances of CW4 are further examined in terms of conductivity, mobility, morphology, and stability to show its potential as an alternative HTM.
Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan. petercyc@mail.ncku.edu.tw.
Ming-Hsien
MH
Li
Che-Wei
CW
Hsu
Po-Shen
PS
Shen
Hsin-Min
HM
Cheng
Yun
Y
Chi
Peter
P
Chen
Tzung-Fang
TF
Guo