2008-01-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/711129摘要：隨著顯示科技和照明需求的發展，白光發光二極體已經漸漸成為目前發展的重點。然而，目前以三五族氮化銦鎵之發光二極體，其發光效率仍然離理論極限有段距離。當電流增加時，其效率有很明顯的減低並伴隨著高熱及散熱的問題。我們計畫發展一系列數值分析軟體來分析發光二極體的散熱問題的，以及電流在元件內部流動的分佈情形，以分析其元件內部效能減弱的關鍵，以提出相對應的方案。並計畫針對LED 元件作細部分析及最佳化，希望藉由優化的設計，來提高效率以及熱效應所衍生的問題，並減少元件設計和實驗測試之時程，加速問題解決的能力和時間。 在本子計畫裡，我們會發展一系列數值來針對三五族氮化物為基礎之元件來處理，我們將會計算LED 元件的能帶，電流的擴散問題，以及發展二維及三維的數值分析技術來計算熱傳導問題，並分析電流過載漏電 的機制，並設計有效率的阻斷層來增加元件內部的量子效率，藉由這些計算和實驗相互驗證，以提高我們元件設計及封裝設計的能力。<br> Abstract: As the development of display and high efficiency lighting market, white light emission diodes (LEDs) are playing the key roles to the industry. However, the power efficiency of III-nitride based LEDs is still far below the theoretical limits. The efficiency is even lower when injection current is increasing. This also leads to heating problem for the device. We plan to develop a series of numerical simulation software to model the heat dissipation problem and the current spreading mechanism in the device. With the analysis results, we can understand the physics underlying and assist us to improve the device performance. With the optimization of the device, we could increase the device conversion efficiency and also reduce the influences of thermal effects. With theses developed numerical programs, we can provide a platform for device design and analysis and reduce the time cost to problem solving. In this proposal, we will develop numerical modeling for solving band structure and current spreading in the device. We will also develop two dimensional and three dimensional thermal dissipation programs to model the heating issue in the device. We will study the electron overflowing mechanism and optimize the design of blocking method to increase the quantum efficiency. With these developing model and examining with experimental results, we can enhance ability of the device design and packaging.氮化鎵銦化鎵量子井白光二極體