Increasing electron transporting properties and horizontal molecular orientation via meta-position of nitrogen for ``(A)n-D-(A)n'' structured terpyridine electron-transporting material - Guo, Xuan; Bian, Mengying; Lv, Fang; Wang, Yuanxun; Zhao, Zifeng; Bian, Zuqiang; Qu, Bo; Xiao, Lixin; Chen, Zhijian (JOURNAL OF MATERIALS CHEMISTRY C, 2019)