Energy level tuning of TPB-based hole-transporting materials for highly efficient perovskite solar cells†
Songtao Lv,Huiyun Wei,Dongmei Li,Qingbo Meng
Chemical Communications Pub Date : 10/20/2014 00:00:00 , DOI:10.1039/C4CC06493C
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.

Graphical abstract: Energy level tuning of TPB-based hole-transporting materials for highly efficient perovskite solar cells