Zhang, JBXu, BYang, LRuan, CQWang, LQLiu, PZhang, WVlachopoulos, NKloo, LBoschloo, GSun, LCHagfeldt, AJohansson, EMJ2018-11-082018-11-082018-11-08201810.1002/aenm.201701209https://infoscience.epfl.ch/handle/20.500.14299/151085WOS:000419864800001The Importance of Pendant Groups on Triphenylamine-Based Hole Transport Materials for Obtaining Perovskite Solar Cells with over 20% Efficiencytext::journal::journal article::research article