From Mononuclear to Dinuclear Iridium(III) Complex: Effective Tuning of the Optoelectronic Characteristics for Organic Light-Emitting Diodes

Xiaolong Yang; Xianbin Xu; Jing Shuang Dang; Guijiang Zhou; Cheuk Lam Ho; Wai Yeung Wong

doi:10.1021/acs.inorgchem.5b02625

From Mononuclear to Dinuclear Iridium(III) Complex: Effective Tuning of the Optoelectronic Characteristics for Organic Light-Emitting Diodes

Xiaolong Yang, Xianbin Xu, Jing Shuang Dang, Guijiang Zhou^*, Cheuk Lam Ho, Wai Yeung Wong^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

131 Citations (Scopus)

Abstract

Phosphorescent dinuclear iridium(III) complexes that can show high luminescent efficiencies and good electroluminescent abilities are very rare. In this paper, highly phosphorescent 2-phenylpyrimidine-based dinuclear iridium(III) complexes have been synthesized and fully characterized. Significant differences of the photophysical and electrochemical properties between the mono- and dinuclear complexes are observed. The theoretical calculation results show that the dinuclear complexes adopt a unique molecular orbital spatial distribution pattern, which plays the key role of determining their photophysical and electrochemical properties. More importantly, the solution-processed organic light-emitting diode (OLED) based on the new dinuclear iridium(III) complex achieves a peak external quantum efficiency (_ext) of 14.4%, which is the highest _ext for OLEDs using dinuclear iridium(III) complexes as emitters. Besides, the efficiencies of the OLED based on the dinuclear iridium(III) complex are much higher that those of the OLED based on the corresponding mononuclear iridium(III) complex.

Original language	English
Pages (from-to)	1720-1727
Number of pages	8
Journal	Inorganic Chemistry
Volume	55
Issue number	4
DOIs	https://doi.org/10.1021/acs.inorgchem.5b02625
Publication status	Published - 15 Feb 2016

Scopus Subject Areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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@article{0fc733cb2c194a94be8302af8aa72b48,

title = "From Mononuclear to Dinuclear Iridium(III) Complex: Effective Tuning of the Optoelectronic Characteristics for Organic Light-Emitting Diodes",

abstract = "Phosphorescent dinuclear iridium(III) complexes that can show high luminescent efficiencies and good electroluminescent abilities are very rare. In this paper, highly phosphorescent 2-phenylpyrimidine-based dinuclear iridium(III) complexes have been synthesized and fully characterized. Significant differences of the photophysical and electrochemical properties between the mono- and dinuclear complexes are observed. The theoretical calculation results show that the dinuclear complexes adopt a unique molecular orbital spatial distribution pattern, which plays the key role of determining their photophysical and electrochemical properties. More importantly, the solution-processed organic light-emitting diode (OLED) based on the new dinuclear iridium(III) complex achieves a peak external quantum efficiency (ext) of 14.4%, which is the highest ext for OLEDs using dinuclear iridium(III) complexes as emitters. Besides, the efficiencies of the OLED based on the dinuclear iridium(III) complex are much higher that those of the OLED based on the corresponding mononuclear iridium(III) complex.",

author = "Xiaolong Yang and Xianbin Xu and Dang, {Jing Shuang} and Guijiang Zhou and Ho, {Cheuk Lam} and Wong, {Wai Yeung}",

note = "Funding Information: This work was financially supported by the Tengfei Project from Xi{\textquoteright}an Jiaotong University, the Fundamental Research Funds for the Central Universities, the Program for New Century Excellent Talents in University, the Ministry of Education of China (NECT-09-0651), the Key Creative Scientific Research Team in Shaanxi Province (2013KCT-05), the China Postdoctoral Science Foundation (Grant 20130201110034), and the National Natural Science Foundation of China (Grants 20902072 and 21572176). W.-Y.W. acknowledges financial support from the Areas of Excellence Scheme of the University Grants Committee (AoE/P-03/08), the National Basic Research Program of China (2013CB834702), the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20140419130507116), Hong Kong Research Grants Council (HKBU203313), and Hong Kong Baptist University (FRG2/13-14/083). Publisher copyright: {\textcopyright} 2016 American Chemical Society",

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month = feb,

day = "15",

doi = "10.1021/acs.inorgchem.5b02625",

language = "English",

volume = "55",

pages = "1720--1727",

journal = "Inorganic Chemistry",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - From Mononuclear to Dinuclear Iridium(III) Complex

T2 - Effective Tuning of the Optoelectronic Characteristics for Organic Light-Emitting Diodes

AU - Yang, Xiaolong

AU - Xu, Xianbin

AU - Dang, Jing Shuang

AU - Zhou, Guijiang

AU - Ho, Cheuk Lam

AU - Wong, Wai Yeung

N1 - Funding Information: This work was financially supported by the Tengfei Project from Xi’an Jiaotong University, the Fundamental Research Funds for the Central Universities, the Program for New Century Excellent Talents in University, the Ministry of Education of China (NECT-09-0651), the Key Creative Scientific Research Team in Shaanxi Province (2013KCT-05), the China Postdoctoral Science Foundation (Grant 20130201110034), and the National Natural Science Foundation of China (Grants 20902072 and 21572176). W.-Y.W. acknowledges financial support from the Areas of Excellence Scheme of the University Grants Committee (AoE/P-03/08), the National Basic Research Program of China (2013CB834702), the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20140419130507116), Hong Kong Research Grants Council (HKBU203313), and Hong Kong Baptist University (FRG2/13-14/083). Publisher copyright: © 2016 American Chemical Society

PY - 2016/2/15

Y1 - 2016/2/15

N2 - Phosphorescent dinuclear iridium(III) complexes that can show high luminescent efficiencies and good electroluminescent abilities are very rare. In this paper, highly phosphorescent 2-phenylpyrimidine-based dinuclear iridium(III) complexes have been synthesized and fully characterized. Significant differences of the photophysical and electrochemical properties between the mono- and dinuclear complexes are observed. The theoretical calculation results show that the dinuclear complexes adopt a unique molecular orbital spatial distribution pattern, which plays the key role of determining their photophysical and electrochemical properties. More importantly, the solution-processed organic light-emitting diode (OLED) based on the new dinuclear iridium(III) complex achieves a peak external quantum efficiency (ext) of 14.4%, which is the highest ext for OLEDs using dinuclear iridium(III) complexes as emitters. Besides, the efficiencies of the OLED based on the dinuclear iridium(III) complex are much higher that those of the OLED based on the corresponding mononuclear iridium(III) complex.

AB - Phosphorescent dinuclear iridium(III) complexes that can show high luminescent efficiencies and good electroluminescent abilities are very rare. In this paper, highly phosphorescent 2-phenylpyrimidine-based dinuclear iridium(III) complexes have been synthesized and fully characterized. Significant differences of the photophysical and electrochemical properties between the mono- and dinuclear complexes are observed. The theoretical calculation results show that the dinuclear complexes adopt a unique molecular orbital spatial distribution pattern, which plays the key role of determining their photophysical and electrochemical properties. More importantly, the solution-processed organic light-emitting diode (OLED) based on the new dinuclear iridium(III) complex achieves a peak external quantum efficiency (ext) of 14.4%, which is the highest ext for OLEDs using dinuclear iridium(III) complexes as emitters. Besides, the efficiencies of the OLED based on the dinuclear iridium(III) complex are much higher that those of the OLED based on the corresponding mononuclear iridium(III) complex.

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U2 - 10.1021/acs.inorgchem.5b02625

DO - 10.1021/acs.inorgchem.5b02625

M3 - Journal article

AN - SCOPUS:84958775615

SN - 0020-1669

VL - 55

SP - 1720

EP - 1727

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 4

ER -

From Mononuclear to Dinuclear Iridium(III) Complex: Effective Tuning of the Optoelectronic Characteristics for Organic Light-Emitting Diodes

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