Near-Infrared Polymer Light-Emitting Diodes with High Efficiency and Low Efficiency Roll-off by Using Solution-Processed Iridium(III) Phosphors

被引：118

作者：

Cao, Xiaosong ^{[1
]}

Miao, Jingsheng ^{[2
]}

Zhu, Minrong ^{[1
]}

Zhong, Cheng ^{[1
]}

Yang, Chuluo ^{[1
]}

Wu, Hongbin ^{[2
]}

Qin, Jingui ^{[1
]}

Cao, Yong ^{[2
]}

机构：

[1] Wuhan Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Organ & Polymer Optoelect Mat, Dept Chem, Wuhan 430072, Peoples R China

[2] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2015年 / 27卷 / 01期

基金：

中国国家自然科学基金;

关键词：

PHOTOPHYSICAL PROPERTIES; BIPOLAR HOST; COMPLEXES; RED; EMISSION; METAL; PERFORMANCE; DERIVATIVES; MORPHOLOGY; MOLECULE;

D O I：

10.1021/cm503361j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two deep-red/near-infrared (NIR) iridium phosphors, (fldpqx)(2)Ir-(acac) and (thdpqx)(2)Ir(acac), were rationally designed and synthesized considering the emission wavelength, emission efficiency, and solubility. In optimized solution-processed phosphorescent polymer light-emitting devices, the (fldpqx)(2)Ir(acac)-based device achieved a maximum external quantum efficiency of 5.7% with the emission peak at 690 nm, while the (thdpqx)(2)Ir(acac)-based device achieved a maximum external quantum efficiency of 3.4% with the emission peak at 702 nm, which are comparable to the highest values ever reported for solution-processable NIR emitters. Moreover, these devices merely experienced low efficiency roll-off at high current densities.

引用

页码：96 / 104

页数：9

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