title: Energy level tuning of TPB-based hole-transporting materials for highly efficient perovskite solar cells.
abstract: Two TPB-based HTMs were synthesized and their energy levels were tuned to match with perovskite by introducing electron-donating groups asymmetrically. The TPBC based doping-free perovskite solar cell afforded an impressive PCE of 13.10% under AM 1.5G illumination, which is the first case of an effective device with TPB-based doping-free HTMs.
authors.affiliation: Department of Applied Chemistry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. xiaoyin@tju.edu.cn.
authors.forename: Yakun
authors.initials: Y
authors.lastname: Song
authors.forename: Songtao
authors.initials: S
authors.lastname: Lv
authors.forename: Xicheng
authors.initials: X
authors.lastname: Liu
authors.forename: Xianggao
authors.initials: X
authors.lastname: Li
authors.forename: Shirong
authors.initials: S
authors.lastname: Wang
authors.forename: Huiyun
authors.initials: H
authors.lastname: Wei
authors.forename: Dongmei
authors.initials: D
authors.lastname: Li
authors.forename: Yin
authors.initials: Y
authors.lastname: Xiao
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Meng