A weak electron transporting material with high triplet energy and thermal stability via a super twisted structure for high efficient blue electrophosphorescent devices
A weak electron transporting material with high triplet energy and thermal stability via a super twisted structure for high efficient blue electrophosphorescent devices
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一种通过超扭曲结构具有高三线态能量和热稳定性的弱电子传输材料,用于高效蓝色电致磷光器件
DOI:
10.1039/c1jm13488d
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发表时间:
2011-11
影响因子:
--
通讯作者:
Ji, Ziwu
中科院分区:
文献类型:
--
作者:
Gong, Qihuang;Qi, Boyuan;Xing, Xing;Zheng, Lingling;Kong, Sheng;Chen, Zhijian;Qu, Bo;Zhang, Lipei;Ji, Ziwu
A high triplet energy (ET = 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 ET and improved thermal stability for blue electrophosphorescent devices.
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影响因子:
29.4
作者:
Lixin Xiao;Shi-jian Su;Y. Agata;Hsinglin Lan;J. Kido
通讯作者:
Lixin Xiao;Shi-jian Su;Y. Agata;Hsinglin Lan;J. Kido
影响因子:
1.6
作者:
Takahito Oyamada;H. Yoshizaki;H. Sasabe;C. Adachi
通讯作者:
Takahito Oyamada;H. Yoshizaki;H. Sasabe;C. Adachi
影响因子:
29.4
作者:
Tsai, Ming-Han;Lin, Hao-Wu;Wu, Chih-I
通讯作者:
Wu, Chih-I
影响因子:
4
作者:
Tokito, S;Iijima, T;Sato, F
通讯作者:
Sato, F
影响因子:
29.4
作者:
Choudhury, Kaushik Roy;Yoon, Jong-hyuk;So, Franky
通讯作者:
So, Franky