Improving efficiency roll-off in phosphorescent OLEDs by modifying the exciton lifetime

被引：22
作者：
Ji, Wenyu [2 ]
Zhang, Letian [1 ]
Xie, Wenfa [1 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
[2] Chinese Acad Sci, State Key Lab Luminescence & Applicat Fine Mech &, Changchun 130033, Peoples R China
来源：
OPTICS LETTERS | 2012年 / 37卷 / 11期
基金：
中国国家自然科学基金;
关键词：
LIGHT-EMITTING DEVICES; ORGANIC ELECTROPHOSPHORESCENCE; DIODES;
D O I：
10.1364/OL.37.002019
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Studies on phosphorescent organic light emitting devices (PhOLEDs) with phosphorescent emitter, fac-tris (2-phenylpyridine) iridium (Ir(ppy)(3)), show that the lifetime of triplet exciton is modified by surface plasmon coupling of Au nanoparticles (NPs). Interactions between the triplet exciton and gold (Au) nanoparticles (NPs) lead to a decrease in the exciton lifetime and result in the spontaneous emission decay rate of triplet exciton faster as the distance between the phosphorescent material and the Au NPs becomes smaller. This interaction reduces the efficiency roll-off of Au NPs containing device. These results provide new guides for device design to improve efficiency performance. (C) 2012 Optical Society of America
引用
收藏
页码：2019 / 2021
页数：3
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