Non-Conjugated Polymer as an Efficient Dopant-Free Hole-Transporting Material for Perovskite Solar Cells

Yachao Xu, Tongle Bu, Meijin Li, Tianshi Qin, Chengrong Yin, Nanna Wang, Renzhi Li, Jie Zhong, Hai Li, Yong Peng, Jianpu Wang, Linghai Xie, Wei Huang