SiO2 composites for high color stability and light extraction efficiency in OLED

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-04-01 Epub Date: 2025-02-15 DOI:10.1016/j.optmat.2025.116814

Yi-Ting Lee , Tzu-Ying Yen , Mao-Ying Chen , Bo-Yen Lin

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Abstract

In this study, a facile method for preparing SiO₂ composites with poly(methyl methacrylate) (PMMA) is reported. Photophysical properties, which includes surface morphology, thermal and optical properties, for the proposed SiO₂ composites are comprehensively identified. The SiO₂ composites feature highly transparent with a high transmittance of 91.0 % and a high haze of 99.1 % in the UV–vis regime and are employed for organic light-emitting devices (OLEDs) to improve device performance. Consequently, the external quantum efficiency (EQE) of multiple resonance (MR)-OLEDs attached SiO₂ composites were found to be improved, rising from 2.38 % to 4.88 %, corresponding to a significant efficiency enhancement of 104 % compared with the reference. Additionally, applying SiO₂ composites to commercial white OLED panel demonstrates an ultra-small angular color shift of (0.0003, 0.0061) as viewing angles increased from 0° to 60°, which was deduced from the large diffusing angle induced strong scattering capability. It is worth noting that the fabrication of the proposed SiO₂ composites is facile and low-cost, and the substantial improvement in OLED performance indicates that this approach is promising for display and light applications.

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用于OLED的高颜色稳定性和光提取效率的SiO2复合材料

本文报道了一种用聚甲基丙烯酸甲酯（PMMA）制备SiO2复合材料的简便方法。全面鉴定了SiO2复合材料的光物理性质，包括表面形貌、热学和光学性质。SiO2复合材料在紫外-可见光谱下具有91.0%的高透光率和99.1%的高雾度，具有高透明度，可用于有机发光器件（oled），以提高器件性能。结果表明，多共振(MR)- oled复合材料的外量子效率（EQE）得到了提高，从2.38%提高到4.88%，与参考材料相比，效率提高了104%。另外，将SiO2复合材料应用于商用白色OLED面板上，当视角从0°增加到60°时，其角度色移极小，为（0.0003,0.0061），这是由大扩散角引起的强散射能力推断出来的。值得注意的是，所提出的SiO2复合材料的制造简单且成本低，并且OLED性能的实质性改善表明该方法在显示和照明应用方面具有前景。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.