Microcavity Effect on Modulation Bandwidth Characteristics in Organic Light-emitting Diodes

被引：0

作者：

Li B. ^{[1
]}

Liu S. ^{[1
]}

Zhang L. ^{[1
]}

Xie W. ^{[1
]}

机构：

[1] State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Jilin University Region, Changchun

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2024年 / 45卷 / 03期

基金：

中国国家自然科学基金;

关键词：

microcavity; modulation bandwidth; organic light-emitting device; spontaneous emission rate; visible light communication;

D O I：

10.37188/CJL.20230331

中图分类号：

学科分类号：

摘要：

Visible light communication（VLC）technology ingeniously integrates communication and illumination or display， providing an efficient and convenient solution for communication. Organic light-emitting diodes （OLEDs），serving as an artificial light source closest to natural sunlight，exhibit tremendous application potential at the transmitter end of VLC systems. However，constrained by the slow radiative recombination rate of organic luminescent dyes，OLEDs always demonstrate a sluggish response speed under high-frequency signal excitation. To overcome this limitation，we propose the utilization of a microcavity structure with the aim of enhancing the spontaneous emission rate of organic emitters through the microcavity effect，thereby improving the device's frequency response. Research results indicate that the Purcell effect induced by an optical microcavity with a specific cavity length can elevate the photon density at the emitter position，accelerating its spontaneous emission rate. This enhancement successfully increases the modulation bandwidth from 4 kHz to 7 kHz，expanding the response frequency range by nearly 75%. © 2024 Editorial Office of Chinese Optics. All rights reserved.

引用

页码：468 / 475

页数：7

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