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Chinese Journal of Organic Chemistry >

2024 , Vol. 44 >Issue 8: 2563 - 2570

DOI: https://doi.org/10.6023/cjoc202403052

ARTICLES

Unsymmetric Phosphorescent Ir(III) Complexes with Ambipolar Features and Investigation for Both Aggregation-Induced Phosphorescent Emission and Electroluminescent Properties

  • Ziyi Chen ,
  • Siqi Liu ,
  • Zhao Feng ,
  • Daokun Zhong ,
  • Xiaolong Yang ,
  • Yuanhui Sun ,
  • Xianbin Xu ,
  • Zhen Feng ,
  • Ling Yue ,
  • Guijiang Zhou
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  • a School of Chemistry, Xi'an Jiaotong University, Xi'an 710049
    b Shaanxi Lighte Optoelectronics Material Co., Ltd., Xi'an 710056
*E-mail: ;

Received date: 2024-03-30

  Revised date: 2024-05-22

  Online published: 2024-07-15

Supported by

National Natural Science Foundation of China(52161145411); National Natural Science Foundation of China(21875179); National Natural Science Foundation of China(22175137); National Natural Science Foundation of China(21602170); National Natural Science Foundation of China(51803163)

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Abstract

Two unsymmetric Ir(III) phosphorescent complexes have been prepared with functionalized both 2-phenyl- pyridine (ppy)- and 2-vinylpyridine (vpy)-type ligands to investigate their optoelectronic properties. Photophysical results show that there are two kinds of radiative excited states contributing their phosphorescent emission. In addition, the unsymmetric Ir(III) phosphorescent complexes can exhibit aggregation-induced/enhanced phosphorescent emission behavior. Electrochemical results indicate that introducing functional group can confer ambipolar features to the unsymmetric Ir(III) phosphorescent complexes. In addition, they can show decent electroluminescent ability with turn-on voltage (Vturn-on) less than 3.0 V, maximum luminescence (Lmax) of 11380 cd•m－2, maximum external quantum efficiency (ηext) of 5.3%, maximum current efficiency (ηL) of 12.9 cd•A－1 and maximum power efficiency (ηP) of 13.6 lm•W－1. All these results can provide valuable information for design and synthesis of new electroluminescent materials with aggregation-induced phosphorescent emission ability.

Key words： unsymmetric structure; Ir(III) phosphorescent complexes; aggregation-induced phosphorescent emission; ambipolar features; electroluminescence

Cite this article

Ziyi Chen , Siqi Liu , Zhao Feng , Daokun Zhong , Xiaolong Yang , Yuanhui Sun , Xianbin Xu , Zhen Feng , Ling Yue , Guijiang Zhou . Unsymmetric Phosphorescent Ir(III) Complexes with Ambipolar Features and Investigation for Both Aggregation-Induced Phosphorescent Emission and Electroluminescent Properties[J]. Chinese Journal of Organic Chemistry, 2024 , 44(8) : 2563 -2570 . DOI: 10.6023/cjoc202403052

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