微透镜阵列在提高OLED取光效率中的应用

Applications of Microlens Arrays for Light Extraction Enhancement in OLED

摘要:

有机电致发光二极管(OLED)具有寿命长、节能、绿色环保等特点, 有望成为下一代重要光源。制约OLED发展的一个重要障碍是其取光效率较低。为了提高OLED取光效率, 研究者进行了大量的研究, 其中应用微透镜阵列提高OLED取光效率是一种重要方式。文章简单分析了微透镜阵列提高OLED取光效率的原理, 综述分析了各种结构特征的微透镜阵列在提高OLED取光效率中的应用, 总结了在OLED基底表面制备微透镜阵列的方法、优缺点, 以及应用微透镜阵列提高OLED取光效率的最新进展和发展趋势。

Abstract:

Low out-coupling efficiency is an important problem limiting the development of OLED. Various methods have been proposed for solving it, and fabrication microlens array (MLA) on the glass substrates is an effective one. In this paper, the principles of improving the out-coupling efficiency with MLA were analyzed, and MLAs with various kinds of architectural feature were introduced for light extraction enhancement in OLED. Various fabrication methods are summarized and the latest advances and development trends in MLA for light extraction enhancement in OLED are presented.