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高效的超薄EML蓝色PHOLED带有外部采光扩散器.

Shin-Woo Kang^1,2, Eun-Jeong Bae^1,2, Young-Wook Park²

¹Display and Nanosensor Laboratory, Department of Electrical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.

Nanomaterials (Basel, Switzerland)

|August 26, 2023

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扩散器通过提高电效率 (EL) 和视角来增强蓝色光有机发光二极管 (PHOLED). 最佳的扩散器设计,特别是大而紧密的半球,显著提高了外部量子效率 (EQE).

科学领域:

材料科学材料科学材料科学
光电学是指光电子产品.
有机电子有机电子

背景情况:

蓝色光有机发光二极管 (PHOLED) 对于显示技术至关重要,但在效率和视角方面面临挑战.
使用超薄排放层 (EML) 结构来提高PHOLED的性能.
扩散器被研究为一种改善光取和整体设备特征的方法.

研究的目的:

系统地分析各种扩散器对超薄EML蓝色PHOLED电发光 (EL) 特性的影响.
优化扩散器设计 (图案形状,尺寸,分布,包装) 以提高效率和视角.
了解扩散器结构与EL性能增强之间的关系.

主要方法:

蓝色PHOLED与超薄EML结构的制造.
不同形状 (半球/球体),大小 (4-75μm),分布 (表面/嵌入式) 和包装 (密封/随机) 的各种扩散器的集成.
系统分析电光发射 (EL) 特性,包括外部量子效率 (EQE) 和视角配置文件.

主要成果:

扩散器应用显著增强了EL特性,改进取决于扩散器结构.
最大的,密集的半球扩散器 (75微米) 实现了最高的EQE改善 (1.47倍),达到24.3%,而参考值为16.6%.

关键词:

爱尔兰的爱尔兰人蓝色的OLED显示器扩散器扩散器是什么嵌入式嵌入式嵌入式一个半球半球.光的提取光的提取.有机发光二极管 (OLED) 是一种有机发光二极管.光灯是一种光灯.这是一个球体球体.超薄的EML可以使用.没有使用兴奋剂的未兴奋剂者.视角的角度可以看.

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与参考设备相比,与优化的扩散器观察到5.1%更宽的视角.

结论:

扩散器可以选择性地应用,以提高超薄EML蓝色PHOLED的EL效率和视角.
扩散器设计,特别是尺寸和包装,对于最大限度地提高EQE来说至关重要.
对高密度,大尺寸嵌入式结构的进一步调查显示,有可能产生广的视角和相当大的EQE收益.