螢光粉參數對於白光LED封裝效率之研究

The studies of power efficiency with different phosphor parameters in white LEDs

鄭又瑄(Yow-shiuan jeng)

指導教授 ： 孫慶成

國立中央大學/理學院/光電科學研究所/碩士(2011年)

摘要

本篇論文我們針對矽酸鹽螢光粉濃度與厚度對於白光LED封裝效率的影響進行研究與分析。首先利用已建構之矽酸鹽螢光粉模型，以藍光雷射激發各種不同濃度與厚度的螢光粉薄片，分析其正向、側向及背向的能量，並以實驗驗證模擬結果，作為後續白光LED封裝效率比較的分析基礎。接著將激發光源改為藍光LED，在螢光粉遠離晶片的實驗架構下，比較不同濃度與厚度螢光粉對封裝效率的影響；此外也利用模擬改變封裝腔體的反射率，進一步分析螢光粉濃度、厚度與白光LED封裝效率之間的對應關係。

關鍵字

白光LED ； 矽酸鹽螢光粉 ； 封裝效率

並列摘要

In this thesis, we studied on the power efficiency with different phosphor concentrations and thicknesses in white LEDs. Based on our silicate phosphor model, we used a blue light laser to excite phosphor plates with different concentrations and thicknesses and analysis the forward power, sideward power and backward power of each phosphor plate in the first time. We also did the experiment to verify our simulation and then used the measurement results to analysis the power efficiency in white LEDs later. Secondly, we changed the light source from a blue light laser to a blue LED and researched the power efficiency with different phosphor concentrations and thicknesses under the remote phosphor configuration. Besides, we also changed the surface reflectance in the simulation in order to figure out the reciprocal effects among phosphor concentration, phosphor thickness and power efficiency in white LEDs.

並列關鍵字

silicate phosphor ； power efficiency ； white LED

參考文獻

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