Long-Lived and Highly Efficient TADF-PhOLED with ``(A)n-D-(A)n'' Structured Terpyridine Electron-Transporting Material - Bian, Mengying; Zhang, Dongdong; Wang, Yuanxun; Chung, Yao-Hsien; Yang Liu; Ting, Hungkit; Lian Duan; Chen, Zhijian; Bian, Zuqiang; Liu, Zhiwei; Xiao, Lixin (ADVANCED FUNCTIONAL MATERIALS, 2018)