高效能YAG螢光粉之特性量測與模型

The Characteristic Measurement and Model of High-Performance YAG Phosphor

紀葦世(Wei-Shih Ji)

指導教授 ： 張明文

元智大學/電機通訊學院/光電工程學系/碩士(2011年)

https://doi.org/10.6838/YZU.2011.00015

摘要

在本論文中，為了探討YAG螢光粉封裝成白光LED的光學特性，因此建立YAG螢光粉光學模型，而光學模型可分成散射模型、吸收係數與轉換係數來討論。我們利用蒙地卡羅光追跡法結合米氏散射理論來描述光線於螢光粉膠體中的散射行為，之後藉由藍光與黃光兩次光追跡來描述白光的光學特性，再經由實驗與模擬來分析吸收係數與轉換係數，由於螢光粉對不同波長激發光的吸收能力皆不相同，故引入β參數來提高螢光粉模型在色彩表現預測的準確性，最後藉由實際封裝白光LED來驗證模型準確性。

關鍵字

YAG螢光粉 ； 模型

並列摘要

In this thesis, we build up a precise model to describe the optical characteristic of white LEDs based on YAG phosphor. The modeling parameters include scattering model, absorption coefficient and transfer coefficient. We simulate light scattering in YAG phosphor with Mie scattering based on Monte Carlo ray tracing. The simulation includes the optical behaviors of blue lights and yellow lights. The experimental measurement results are applied to figure out the modeling parameters. Since the absorption and emission of the phosphor is a function of incident wavelength, we introduce a β factor to increase the accuracy of phosphor simulation.

並列關鍵字

YAG phoshpor ； Model

參考文獻

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