4-Electron Redox Enabled by a Perylene Diimide Containing Side-chain Amines for Efficient Organic Cathode DevelopmentZhiling He & Junfeng Zhu & Mingyu Yin & Deyi Liao & Jiajin Feng & Qingguang Zeng & Hui Yu & John H. Xin & Da Wang & Xi LiuPDF