Shin Jin-Wook, Cho Doo-Hee, Moon Jaehyun, Joo Chul Woong, Lee Jonghee, Huh Jin Woo, Park Seung Koo, Han Jun-Han, Cho Nam Sung, Hwang Joohyun, Chu Hye Yong, Lee Jeong-Ik
Opt Lett. 2014 Jun 15;39(12):3527-30. doi: 10.1364/OL.39.003527.
In this study, we investigated the effect of a random nanostructure scattering layer (RSL) on the microcavity and light extraction in organic light emitting diodes (OLEDs). In the case of the conventional OLED, the optical properties change with the thickness of the hole transporting layer (HTL) because of the presence of a microcavity. However, OLEDs equipped with the an RSL showed similar values of external quantum efficiency and luminous efficacy regardless of the HTL thickness. These phenomena can be understood by the scattering effect because of the RSL, which suppresses the microcavity effect and extracts the light confined in the device. Moreover, OLEDs with the RSL led to reduced spectrum and color changes with the viewing angle.
在本研究中，我们研究了随机纳米结构散射层（RSL）对有机发光二极管（OLED）中微腔和光提取的影响。在传统OLED的情况下，由于微腔的存在，光学性质会随空穴传输层（HTL）的厚度而变化。然而，配备了RSL的OLED无论HTL厚度如何，都表现出相似的外量子效率和发光效率值。这些现象可以通过RSL的散射效应来理解，它抑制了微腔效应并提取了限制在器件中的光。此外，带有RSL的OLED导致光谱和颜色随视角的变化减小。
