奈米顆粒散射膜特性之分析

Analyses of Characteristics of Nano-Particle Scattering Layers

謝子文(Tzu-Wen Hsieh)

指導教授 ： 吳忠幟

共同指導教授 ： 曾雪峰(Snow H. Tseng)

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2012年)

https://doi.org/10.6342/NTU.2012.01299

摘要

近年來，奈米顆粒散射膜被廣泛應用於有機發光元件，對於提升元件的出光耦合效率有著良好的幫助。但是如何去設計一個散射膜，使其擁有較佳的表現，便是本論文所要探討的主要課題。
本論文中先介紹電磁理論中光學定理（Optical Theorem），接著說明各項散射參數與其所代表的物理意義，並且作為設計奈米顆粒散射膜的主要參考依據。米氏理論（Mie Theory）是依據馬克斯威爾方程式（Maxwell Equations）解平面波入射單一球體的解析解，藉由撰寫程式實作並且模擬，可以瞭解到單一球體的散射特性。然而這並不足以瞭解多顆球體組成的整體散射性質。所以接著會介紹廣義多顆粒米氏解（The Generalized Multi-Particle Mie-Solution），這是一個以米氏理論為根本，推導至多球體散射的數值展開解，並且嚴格遵守馬克斯威爾方程式。藉由實作此模型，可以模擬多顆球體之間不同組合的各種散射性質，並且藉此設計所需要的奈米顆粒散射膜。

關鍵字

有機發光二極體 ； 散射膜 ； 奈米顆粒 ； 多顆粒散射 ； 米氏理論 ； 光學定理

並列摘要

In recent years, nano-particle scattering films are widely used in organic light-emitting devices (OLEDs) to enhance the optical out-coupling efficiency. How to design nano-particle diffuser films for better performance is the main topic of this thesis.
We first introduce the Optical Theorem in the electromagnetic theory, and then describe the scattering parameters, their physical meanings, and their association with the design of nano-particle scattering films. Mie theory gives the analytic solution of a plane wave incident on a single sphere. The scattering characteristics of a single sphere can be learned by writing a simulation program to implement this model. However, it is not sufficient for obtaining the overall scattering properties of a diffuser film composed of many particles. So we further introduce the Generalized Multi-Particle Mie-Solution, which is a numerical expansion method based on Mie Theory, and strictly obey the Maxwell equations. By implementing this model into computer programs, we can calculate the scattering properties of a variety of combinations of nano-particles.

並列關鍵字

Organic Light-Emitting Diode ； scattering film ； nano-particles ； multi-particle scattering ； Mie Theory ； Optical Theorem

參考文獻

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