Bis-Tridentate Iridium(III) Phosphors with Very High Photostability and Fabrication of Blue-Emitting OLEDs

被引：79

作者：

Kuo, Hsin-Hung ^{[1
,2
]}

Zhu, Ze-lin ^{[3
,4
]}

Lee, Chun-Sing ^{[3
,4
]}

Chen, Yi-Kuang ^{[1
,2
]}

Liu, Shih-Hung ^{[5
]}

Chou, Pi-Tai ^{[5
]}

Jen, Alex K. -Y. ^{[4
,6
]}

Chi, Yun ^{[1
,2
,4
,6
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan

[2] Natl Tsing Hua Univ, Frontier Res Ctr Fundamental & Appl Sci Matters, Hsinchu 30013, Taiwan

[3] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China

[4] City Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

[5] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

[6] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Hong Kong, Peoples R China

来源：

ADVANCED SCIENCE | 2018年 / 5卷 / 09期

关键词：

bis-tridentate; carbazole; iridium; N-heterocyclic carbene (NHC); pyrazolate; EXTERNAL QUANTUM EFFICIENCY; PLATINUM(II) COMPLEXES; OPERATIONAL STABILITY; METAL-COMPLEXES; DIODES; ELECTROLUMINESCENCE; CHROMOPHORE; VOLTAGE; BEARING; DESIGN;

D O I：

10.1002/advs.201800846

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sky-blue and blue-emitting, carbazolyl functionalized, bis-tridentate Ir(III) phosphors Cz-1-Cz-3 with bright emission and short radiative lifetime are successfully synthesized in a one-pot manner. They exhibit very high photostability against UV-vis irradiation in degassed toluene, versus both green and true-blue-emitting reference compounds, i.e., fac-[Ir(ppy)(3)] and mer-[Ir(pmp)(3)]. Organic light-emitting diodes (OLEDs) based on Cz-2 exhibit maximum external quantum efficiency (EQE) of 21.6%, EQE of 15.1% at 100 cd m(-2), and with CIEx,y coordinates of (0.17, 0.25). This study provides a conceptual solution to the exceedingly stable and efficient blue phosphor. It is promising that long lifespan blue OLED based on these emitters can be attained with further engineering of devices suitable for commercial application.

引用

页数：7

共 65 条

[51] Low-Driving-Voltage Blue Phosphorescent Organic Light-Emitting Devices with External Quantum Efficiency of 30% [J].