Surface plasmon-enhanced spontaneous emission rate in an organic light-emitting device structure: Cathode structure for plasmonic application

被引：102
作者：
Yang, Ki Youl [1 ]
Choi, Kyung Cheol [1 ]
Ahn, Chi Won [2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Sch Elect Engn & Comp Sci, Taejon 305701, South Korea
[2] Natl Nanofab Ctr, Taejon 305806, South Korea
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 17期
关键词：
cathodes; lithium compounds; nanoparticles; organic light emitting diodes; photoluminescence; silver; surface plasmons; thin films; time resolved spectra; vacuum deposited coatings;
D O I：
10.1063/1.3125249
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The surface plasmon-enhanced spontaneous emission based on an organic light-emitting device is reported in this paper. For surface plasmon localization, silver nanoparticles were thermally deposited in a high vacuum on cathode that had a 1-nm-thick LiF spacer. Since plasmons provide a strong oscillator decay channel, time-resolved photoluminescence (PL) results displayed a 1.75-fold increased emission rate, and continuous wave PL results showed a twofold enhanced intensity. In addition, LiF film/Ag cluster/LiF film structure resolved the carrier injection problem between the cathode and the organic layer. Thus, the suggested design may follow plasmonic applications for a wider organic optoelectronics.
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页数：3
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