具有双极性或电子注入/传输特性的三异质配体环金属化铱(III)配合物用于高效电致磷光器件。
tris-Heteroleptic cyclometalated iridium(III) complexes with ambipolar or electron injection/transport features for highly efficient electrophosphorescent devices.
作者信息
Xu Xianbin, Yang Xiaolong, Wu Yong, Zhou Guijiang, Wu Chao, Wong Wai-Yeung
机构信息
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Institute of Chemistry for New Energy Materials, Department of Chemistry, Faculty of Science, Xi'an Jiaotong University, Xi'an 710049 (China), Fax: (+86) 29-82663914.
出版信息
Chem Asian J. 2015 Jan;10(1):252-62. doi: 10.1002/asia.201403057. Epub 2014 Dec 15.
A series of tris-heteroleptic phosphorescent cyclometalated Ir(III) complexes with two different cyclometalating ligands and one ancillary ligand was synthesized. Through manipulation of the electronic features of individual cyclometalating ligands, not only the emission color and electrochemical properties of these Ir(III) complexes can be tuned, but also unique charge carrier injection and transport traits can be conferred to them. Owing to the enhanced electron injection/transport and ambipolar characters associated with these tris-heteroleptic structures, these Ir(III) emitters showed very impressive electroluminescent performance with a maximum external quantum efficiency of 20.20 %, luminance efficiency of 69.41 cd A(-1) and power efficiency of 35.15 Lm W(-1) . These results provide a new outlet to design and synthesize highly efficient electrophosphors for phosphorescent organic light-emitting diodes.
合成了一系列具有两种不同环金属化配体和一种辅助配体的三杂环金属磷光铱（III）配合物。通过对单个环金属化配体电子特性的调控，不仅可以调节这些铱（III）配合物的发射颜色和电化学性质，还能赋予它们独特的电荷载流子注入和传输特性。由于这些三杂环结构具有增强的电子注入/传输和双极性特性，这些铱（III）发光体表现出非常令人印象深刻的电致发光性能，最大外量子效率为20.20%，发光效率为69.41 cd A⁻¹，功率效率为35.15 Lm W⁻¹ 。这些结果为设计和合成用于磷光有机发光二极管的高效电致磷光体提供了新的途径。
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