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

被引：116
|
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
收藏
页码：96 / 104
页数：9
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