1. Efficient, Stable, Dopant-Free Hole-Transport Material with a Triphenylamine Core for CH3NH3PbI3 Perovskite Solar Cells.
- Author
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Qi, Peng, Zhang, Fei, Zhao, Xiaoming, Liu, Xicheng, Bi, Xiangdong, Wei, Peng, Xiao, Yin, Li, Xianggao, and Wang, Shirong
- Subjects
SOLAR cells ,TRIPHENYLAMINE ,PEROVSKITE - Abstract
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 NH3 PbI3 -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. [ABSTRACT FROM AUTHOR]- Published
- 2017
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