Ferrocene as a highly volatile solid additive in non-fullerene organic solar cells with enhanced photovoltaic performance

Linglong Ye, Yunhao Cai^*, Chao Li, Lei Zhu, Jinqiu Xu, Kangkang Weng, Kangning Zhang, Miaofei Huang, Min Zeng, Tengfei Li, Erjun Zhou, Songting Tan, Xiaotao Hao, Yuanping Yi, Feng Liu, Zhaohui Wang, Xiaowei Zhan, Yanming Sun^*