用于增强 OLED 光学特性的随机纳米结构外部光提取层的形态研究,Journal of Materials Chemistry C

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用于增强 OLED 光学特性的随机纳米结构外部光提取层的形态研究
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-09-22 , DOI: 10.1039/d3tc02334f
Geun Su Choi _{1,

2} , Shin Woo Kang _{1,

2} , Eun Jeong Bae _{1,

2} , Byeong-Kwon Ju ₁ , Young Wook Park ₂

Affiliation

本研究对基于纳米柱的外部光提取技术进行了深入研究，重点分析了基于柱和平面结构的光提取特性。基于纳米柱的外部光提取结构是通过允许形成和控制平面厚度的工艺技术形成的。本研究制备了基于SU-8的随机纳米结构层，并分析了总高度和平面高度的变化对有机发光二极管（OLED）的光提取效率的影响。使用低温无掩模工艺可以轻松形成纳米结构层，从而能够控制可见光波长范围内的衍射和散射效应。研究结果表明，所制备的纳米结构层在可见光谱中的总透射率超过85%，并且当平面结构的厚度接近于零时，观察到更高的光提取效率。此外，与没有随机纳米柱结构（RNPS）的OLED相比，外量子效率和功率效率分别提高了37.5%和40.4%。这些发现为基于随机纳米柱的外部光提取结构的设计和优化策略提供了宝贵的见解，有助于 OLED 技术的进步。与没有随机纳米柱结构（RNPS）的OLED相比，外量子效率和功率效率分别提高了37.5%和40.4%。这些发现为基于随机纳米柱的外部光提取结构的设计和优化策略提供了宝贵的见解，有助于 OLED 技术的进步。与没有随机纳米柱结构（RNPS）的OLED相比，外量子效率和功率效率分别提高了37.5%和40.4%。这些发现为基于随机纳米柱的外部光提取结构的设计和优化策略提供了宝贵的见解，有助于 OLED 技术的进步。

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A morphological study of random nanostructured external light extraction layers for enhancing optical characteristics of OLEDs

This study presents an in-depth investigation of nano-pillar-based external light extraction techniques, focusing on the analysis of light extraction characteristics based on the pillar and plane structures. The nano-pillar-based external light extraction structure is formed by a process technology that allows for the formation and control of the plane thickness. In this study, a random nanostructure layer based on SU-8 was fabricated, and the impact of variations in the overall height and plane height on the light extraction efficiency of the organic light-emitting diode (OLED) was analyzed. The nanostructure layer was easily formed using a low-temperature mask-free process, enabling control of diffraction and scattering effects in the visible wavelength range. The research results demonstrate that the fabricated nanostructure layer exhibited a total transmittance of over 85% in the visible spectrum, with higher light extraction efficiency observed as the thickness of the plane structure approached zero. Furthermore, compared to OLEDs without the random nano-pillar structure (RNPS), the external quantum efficiency and power efficiency were improved by up to 37.5% and 40.4%, respectively. These findings provide valuable insights into the design and optimization strategies for random nano-pillar-based external light extraction structures, contributing to the advancement of OLED technology.

更新日期：2023-09-22

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