@article { ISI:000297265800025,
	title = {A weak electron transporting material with high triplet energy and thermal stability via a super twisted structure for high efficient blue electrophosphorescent devices},
	journal = {JOURNAL OF MATERIALS CHEMISTRY},
	volume = {21},
	number = {47},
	year = {2011},
	pages = {19058-19062},
	abstract = {A high triplet energy (E-T = 3.2 eV) electron transporting/hole blocking (ET/HB) material, 1,2,4,5-tetra (3-pyrid-3-yl-phenyl)benzene (TemPPB) with a super twisted structure and high thermal stability has been synthesized. An external quantum efficiency (EQE) of 19.6\% was achieved by using TemPPB as the ET/HB material in a blue electrophosphorescent device, much higher than the EQE of 12.5\% for the device using the conventional ET material, 3-(4-biphenyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ). In addition, the weak ET property of TemPPB resulting from its super twisted structure can be enhanced via n-type doping with LiF. An EQE of 24.5\% was achieved by combining n-type doping and a double-emission layer. This shows an alternative way to design ET/HB materials with high E-T and improved thermal stability for blue electrophosphorescent devices.},
	issn = {0959-9428},
	doi = {10.1039/c1jm13488d},
	author = {Xiao, Lixin and Qi, Boyuan and Xing, Xing and Zheng, Lingling and Kong, Sheng and Chen, Zhijian and Qu, Bo and Zhang, Lipei and Ji, Ziwu and Qihuang Gong}
}
