材料科学
有机发光二极管
阴极
光电子学
波长
光学
激光器
电流密度
二极管
图层(电子)
背景(考古学)
制作
半最大全宽
纳米技术
病理
物理化学
古生物学
化学
物理
替代医学
生物
医学
量子力学
作者
A. Coens,Mohamad Chakaroun,A. Fischer,Min Won Lee,Azzedine Boudrioua,Bernard Geffroy,Gautam Vemuri
出处
期刊:Optics Express
[The Optical Society]
日期:2012-12-17
卷期号:20 (28): 29252-29252
被引量:15
摘要
In the context of progress towards the organic laser diode, we experimentally investigate the optical and electrical optimization of an OLED in a vertical λ/2 microcavity. The microcavity consists of a quarter-wavelength TiO₂/SiO₂ multilayer mirror, a half-wavelength-thick OLED and a semitransparent aluminum cathode. The Alq3/DCM2 guest-host system is used as the emitting layer. This study focuses on the design and the fabrication of a half-wavelength thick organic hetero-structure exhibiting a high current density despite both the thickness increase and the cathode thickness reduction. The emission wavelength, the line-width narrowing and the current-density are studied as a function of two key parameters: the hetero-structure optical thickness and the aluminum cathode thickness. The experimental results show that a 125 nm thick cavity OLED ended by a 20 nm thick aluminum cathode exhibits a resonance at 606 nm with a full width at half maximum of 11 nm, and with current-densities exceeding 0.5 A/cm². We show that even without a top high-quality-mirror the incomplete microcavity λ/2 OLED hetero-structure exhibits a clear modification of the spontaneous emission at normal incidence.
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