N-Heterocyclic Carbene Based Pt(II) Complexes with d-p Transition for Highly Performable Green Phosphorescent Electroluminescence

被引：2
|
作者：
Fu, Tiliang [1 ]
Cheng, Shuo [1 ]
Chen, Yuwei [1 ]
Chang, Yu [1 ]
Jiao, Xueting [1 ]
Zhang, Cong [1 ]
Xia, Qinghua [1 ]
Sun, Zhengyi [1 ]
Hang, Xiao-Chun [1 ]
机构：
[1] Nanjing Tech Univ, Sch Flexible Elect Future Technol, Nanjing 211816, Peoples R China
来源：
ADVANCED OPTICAL MATERIALS | 2023年 / 12卷 / 02期
关键词：
d-p transition; green phosphorescent organic light-emitting diodes (PhOLEDs); N-heterocyclic carbene (NHC); tetradentated Pt(II) complex; LIGHT-EMITTING-DIODES; CYCLOMETALATED PLATINUM COMPLEXES; IRIDIUM COMPLEXES; IR(III) COMPLEXES; BLUE; EFFICIENT; TETRADENTATE; DEVICES; OLEDS; STATE;
D O I：
10.1002/adom.202301321
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Novel carbene-based tetradentated Pt(II) complexes, namely Pt(pibOppy) and Pt(ppbOppy), are developed and found to exhibit radiative metal-centered (MC) d-p triplet transition, resulting in highly efficient and configurational-rigid phosphorescence. The Pt(II) complexes emit green light with peak wavelengths of 512-526 nm. Pt(ppbOppy), with enhanced carbene-Pt interaction, achieves a high photoluminescent quantum yield of 99% in thin film, better thermo- and photo-stability, and a structured emission spectrum. Device B1, by incorporating Pt (ppbOppy), shows a narrow green emission with Commission Internationale de l'Elcairage (CIE) coordinates of (0.306, 0.633), a long working lifetime of LT95 = 111 h at 1000 cd m-2, and high maximum values of the external quantum efficiency, power efficiency, and current efficiency of 20.4%, 74.1 lm W-1, and 72.1 cd A(-1), respectively. The exceedingly flawless device performance highlights the immense potential of Pt(II) complexes with d-p transition for organic electroluminescence.
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页数：9
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