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Efficient, Stable, Dopant‐Free Hole‐Transport Material with a Triphenylamine Core for CH 3 NH 3 PbI 3 Perovskite Solar Cells
Author(s) -
Qi Peng,
Zhang Fei,
Zhao Xiaoming,
Liu Xicheng,
Bi Xiangdong,
Wei Peng,
Xiao Yin,
Li Xianggao,
Wang Shirong
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600517
Subject(s) - triphenylamine , dopant , materials science , perovskite (structure) , energy conversion efficiency , fabrication , doping , optoelectronics , relative humidity , chemical engineering , nanotechnology , meteorology , engineering , medicine , alternative medicine , physics , pathology
A star‐shaped hole‐transporting material (HTM) using the triphenylamine (TPA) as the core named TP1 is designed and synthesized. The implementation of the new HTM in CH 3 NH 3 PbI 3 ‐based perovskite solar cells exhibits an excellent overall power conversion efficiency (PCE) of 12.63 % without the use of any dopants and additives, which is comparable to the 14.93 % obtained using p‐doped spiro‐OMeTAD. Importantly, the devices based on TP1 show relatively stable device performance compared to spiro‐OMeTAD after aging in ambient air with 30 % relative humidity without encapsulation in the dark. The present results demonstrate that TPA could be an excellent building block to design dopant‐free HTMs for perovskite solar cells and holds promise to replace p‐doped spiro‐OMeTAD, which is important for the fabrication of cost‐effective and stable devices.