Issue 25, 2020
From the journal:

Dalton Transactions

Near-infrared cyclometalated iridium(iii) complexes with bipolar features for efficient OLEDs via solution-processing †

Junting Yu, ORCID logo *a   Maoqiu Li,a   Chao Xu,*b   Fanyuan Meng,b   Jiamin Cao,a   Hua Tan ORCID logo c  and  Weiguo Zhu ORCID logo *c  

* Corresponding authors

a Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, P. R. China
E-mail: yujuntingtt@163.com

b College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China
E-mail: chaoxu_0205@163.com

c School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
E-mail: zhuwg18@126.com.

Abstract

A novel bipolar NIR iridium(III) complex (CH3OTPA-BTz-Iq)2Ir(pic-OXD) with both a hole transporting (HT) triphenylamine (TPA) group and an electron transporting (ET) oxadiazole (OXD) group was designed and synthesized. It was observed that the incorporation of OXD and TPA into the ligand (CH3OTPA-BTz-Iq)2Ir(pic-OXD) improved the optophysical and electroluminescence performance in comparison with the parent iridium(III) complex (CH3OTPA-BTz-Iq)2Irpic. In (CH3OTPA-BTz-Iq)2Ir(pic-OXD)-based OLEDs, a maximum external quantum efficiency (EQEmax) of 1.15% at 716 nm was obtained, which is much superior than that of the (CH3OTPA-BTz-Iq)2Irpic-based OLEDs (0.41% at 723 nm).

Graphical abstract: Near-infrared cyclometalated iridium(iii) complexes with bipolar features for efficient OLEDs via solution-processing

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Article information

DOI
https://doi.org/10.1039/D0DT01415J
Article type
Paper
Submitted
18 Apr 2020
Accepted
24 May 2020
First published
26 May 2020

Dalton Trans., 2020,49, 8785-8790

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Near-infrared cyclometalated iridium(III) complexes with bipolar features for efficient OLEDs via solution-processing

J. Yu, M. Li, C. Xu, F. Meng, J. Cao, H. Tan and W. Zhu, Dalton Trans., 2020, 49, 8785 DOI: 10.1039/D0DT01415J

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