Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3125249
Keywords
cathodes; lithium compounds; nanoparticles; organic light emitting diodes; photoluminescence; silver; surface plasmons; thin films; time resolved spectra; vacuum deposited coatings
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Funding
- Korea government (MEST) [R11-2007-045-02001-0]
- National Research Foundation of Korea [R11-2007-045-02001-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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