Efficient near-infrared (NIR) polymer light-emitting diode (PLED) based on the binuclear [(C∧N)2Ir-(bis-N∧O)-Ir(C∧N)2] complex with aggregation-induced phosphorescent enhancement (AIPE) character

被引：18
|
作者：
He, Yani [1 ]
Fu, Guorui [1 ]
Li, Wentao [1 ]
Wang, Baowen [1 ]
Miao, Tiezheng [1 ]
Tan, Mingfeng [1 ]
Feng, Weixu [2 ]
Lu, Xingqiang [1 ]
机构：
[1] Northwest Univ, Shaanxi Key Lab Degradable Med Mat, Sch Chem Engn, Xian 710069, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Sch Sci, Dept Appl Chem, Xian 710029, Shaanxi, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2020年 / 218卷
关键词：
Dinuclear Ir(III)-Complex; Aggregation-induced phosphorescent enhancement; NIR luminescence; Polymer light-emitting diode; HETEROLEPTIC IRIDIUM(III) COMPLEXES; IR(III) COMPLEX; EMISSION; LIGANDS; RED;
D O I：
10.1016/j.jlumin.2019.116847
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this work, for the obtained NIR-emitting dinuclear [(iqbt)(2)Ir-L-n-Ir(iqbt)(2)] complexes (n = 1-3, 1-3; Hiqbt = 1-(benzo[b]-thiophen-2-yl)-isoquinoline) with the bridging linkages of three flexible bis-(NO)-O-boolean AND-Schiff-base ligands H2Ln, their obvious aggregation-induced phosphorescent enhancement (AIPE) behaviors in powder-form solid or MeCN-H2O mixture are observed, respectively. Moreover, based on the AIPE-switched NIR phosphorescence (Phi(em) = 0.11 and tau = 0.27 mu s) of the diiridium complex 1 without electron-donating substituents in the aggregation state, its solution-processed NIR-PLED is reliably realized, exhibiting the attractive electroluminescent performance with both eta(max)(EQE) = 1.08% and almost negligible efficiency-roll-off.
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页数：8
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