Achieving 20.8% organic solar cells via additive-assisted layer-by-layer fabrication with bulk p-i-n structure and improved optical management

Lei Zhu, Ming Zhang, Guanqing Zhou, Zaiyu Wang, Wenkai Zhong, Jiaxin Zhuang, Zichun Zhou, Xingyu Gao, Lixuan Kan, Bonan Hao, Fei Han, Rui Zeng, Xiaonan Xue, Shengjie Xu, Hao Jing, Biao Xiao, Haiming Zhu, Yongming Zhang, Feng Liu