Phenanthroimidazole as molecularly engineered switch for efficient and highly long-lived light-emitting electrochemical cell

被引:4
|
作者
Bideh, Babak Nemati [1 ]
Moghadam, Majid [2 ]
Sousaraei, Ahmad [3 ,4 ]
Arani, Behnoosh Shahpoori [2 ]
机构
[1] Bu Ali Sina Univ, Fac Chem, Inorgan Chem Dept, Hamadan, Iran
[2] Univ Isfahan, Dept Chem, Catalysis Div, Esfahan, Iran
[3] PSL Univ, Ecole Normale Super, Inst Mat Poreux Paris, F-75005 Paris, France
[4] Univ Autonoma Madrid, Dept Quim Inorgan, Fac Ciencias, Madrid, Spain
基金
中国国家自然科学基金;
关键词
TURN-ON TIMES; CATIONIC IRIDIUM COMPLEXES; IR(III) COMPLEXES; ELECTROLUMINESCENT DEVICES; EXCITED-STATES; BLUE-GREEN; PHOSPHORESCENT; PERFORMANCE; STABILITY; ADDITIVES;
D O I
10.1038/s41598-023-29527-7
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Light-emitting electrochemical cells (LECs) based on Ir(III) complexes owing to the superior advantages exhibit high potential for display and lighting applications. Herein, a series of Ir(III) complexes based on phenanthroimidazole (PI) as an ancillary ligand were synthesized to achieve efficient and highly stable yellow-to-orange LEC devices with fast response. These complexes exhibit appropriate electrochemical stability and significant suppression of concentration quenching in the thin films compared to the archetype complex. The fabricated LECs showed remarkably long device lifetimes over 1400 and 2100 h and external quantum efficiency of 2 and 3% for yellow and orange-LECs, respectively. The obtained t(1/2) for yellow LEC is much higher than archetype [Ir(ppy)(2)(phen)](+) and their phenanthroline-based analogues reported so far. The incorporation of an ionic tethered functional group on PI, improved the mobility of the emissive layer and reduced the device turn-on time by 75-88%. This study shows a facile functionalization and characterization of the PI ligand as well as its potential application in optoelectronic devices (OLED).
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页数:11
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