Thiazole-based metallophosphors of iridium with balanced carrier injection/transporting features and their two-colour WOLEDs fabricated by both vacuum deposition and solution processing-vacuum deposition hybrid strategy

被引：62

作者：

Yang, Xiaolong ^{[1
,2
]}

Zhao, Yongbiao ^{[4
]}

Zhang, Xinwen ^{[3
]}

Li, Rui ^{[1
,2
]}

Dang, Jingshuang ^{[1
,2
]}

Li, Yan

Zhou, Guijiang ^{[1
,2
]}

Wu, Zhaoxin ^{[3
]}

Ma, Dongge ^{[4
]}

Wong, Wai-Yeung ^{[5
,6
,7
]}

Zhao, Xiang ^{[1
,2
]}

Ren, Aimin ^{[8
]}

Wang, Lixiang ^{[4
]}

Hou, Xun ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Fac Sci, Dept Chem, Xian 710049, Peoples R China

[3] Xi An Jiao Tong Univ, Key Lab Phys Elect & Devices, Minist Educ, Sch Elect & Informat Engn, Xian 710049, Peoples R China

[4] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[5] Hong Kong Baptist Univ, Inst Mol Funct Mat, Hong Kong, Hong Kong, Peoples R China

[6] Hong Kong Baptist Univ, Dept Chem, Hong Kong, Hong Kong, Peoples R China

[7] Hong Kong Baptist Univ, Ctr Adv Luminescence Mat, Hong Kong, Hong Kong, Peoples R China

[8] Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130023, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 15期

基金：

中国国家自然科学基金;

关键词：

LIGHT-EMITTING DEVICES; EFFECTIVE CORE POTENTIALS; SATURATED RED EMISSION; HIGH-EFFICIENCY; PLATINUM(II) COMPLEXES; TRIPLET EMITTERS; PHOTOPHYSICAL PROPERTIES; PHOSPHORESCENT MATERIALS; MOLECULAR CALCULATIONS; EXCITED-STATE;

D O I：

10.1039/c2jm14712b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

New phosphorescent iridium(III) cyclometallated complexes bearing thiazole-based ligands (IrTZ1 and IrTZ2) have been developed. The functionalized organic ligands derived by combining the thiazolyl moiety and triphenylamino group have conferred not only favorable hole-injection/hole-transporting (HI/HT) features but also more balanced charge carrier injection/transporting traits to the as-prepared iridium(III) metallophosphors. Owing to the unique electronic structures afforded by the ligand, the orange organic light-emitting devices (OLEDs) made from IrTZ1 can furnish peak external quantum efficiency (eta(ext)) of 14.82%, luminance efficiency (eta(L)) of 39.97 cd A(-1) and power efficiency (eta(p)) of 34.95 lm W-1. Inspired by its outstanding electroluminescence (EL) performance, the orange IrTZ1 phosphor complemented with a blue phosphor FIrpic was employed to fabricate highly efficient white organic light-emitting devices (WOLEDs) with a single emission layer. Despite their simple device configuration, the optimized WOLEDs can still maintain decent electroluminescence (EL) ability with eta(ext) of 7.20%, eta(L) of 18.07 cd A(-1) and eta(p) of 19.57 lm W-1. With the aim to simplify the fabrication process of multi-layered WOLEDs, two-component WOLEDs were obtained through a novel solution processing-vacuum deposition hybrid method with the doped blue fluorescent emission layer deposited by a solution process and the orange phosphorescent emission layer made by vacuum deposition. The WOLEDs prepared using such exploratory approach can show an attractive EL performance with eta(ext) of 9.06%, eta(L) of 22.72 cd A(-1) and eta(p) of 17.28 lm W-1. All these data have indicated not only the great potential of the orange phosphor in monochromatic and white OLEDs, but also the importance of the hybrid method for simplifying WOLED fabrication.

引用

页码：7136 / 7148

页数：13

共 114 条

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