Improved out-coupling efficiency from a green microcavity OLED with a narrow band emission source

被引：32
|
作者：
Fleetham, Tyler [1 ]
Ecton, Jeremy [1 ]
Li, Guijie [1 ]
Li, Jian [1 ]
机构：
[1] Arizona State Univ, Dept Mat Sci & Engn, Tempe, AZ 85284 USA
来源：
ORGANIC ELECTRONICS | 2016年 / 37卷
基金：
美国国家科学基金会;
关键词：
Microcavity; Platinum complexes; Light extraction; Narrow spectral emission band; LIGHT-EMITTING-DIODES; EXTERNAL QUANTUM EFFICIENCY; EXTRACTION EFFICIENCY; TRANSPORT MATERIALS; PLATINUM COMPLEXES; DEVICES; FLUORESCENT; LUMINESCENCE; TETRADENTATE; ENHANCEMENT;
D O I：
10.1016/j.orgel.2016.05.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A highly efficient green microcavity organic light emitting diode was developed using a tetradentate cyclometalated platinum complex, PtN1N, with an intrinsically narrow emission spectral band (FWHM = 18 nm). Devices employing the narrow band emitter in MOLEDs consisting of a single pair of a high index dielectric, Ta2O5, and low index dielectric, SiO2, exhibited a high peak external quantum efficiency of 33.7% compared to a standard OLED in the same device architecture with a peak external quantum efficiency of 25.6%. We have also found in our study that narrow band emission sources in tuned microcavity OLEDs exhibit larger enhancements in light out-coupling efficiency accompanied by small changes in color with respect to viewing angle compared to broad band emitters which is advantageous in display applications. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：141 / 147
页数：7
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