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  • 學位論文

氮化鎵系列發光二極體特性改善之研究

Investigation on the improvement of GaN based LEDs

指導教授 : 林俊良

摘要


LED以GaN材料為主,一般使用InGaN製作量子井來增加電子電洞對的複合率提升LED的效率,可是InGaN材料會使得晶格品質下降造成內部量子效率下降,所以我們試著使用gradient-stage 結構來改善我們主動層的晶格品質。 c-plane GaN系列LED會產生內建電場的情形,稱為量子侷限史坦克效應(Quantum Confine Stark Effect,QCSE),會影響減弱元件的發光效應。而a-plane為非極性面,可有效消除史坦克效應。另外P-GaN的活化也是一個很重要的課題,P-GaN活化可得到更高的電洞濃度(Hole Concentration),使得LED的發光效率得以提升。本論文以熱退火(Thermal annealing)方式來活化a-plane P極的GaN 。N2與O2做為活化所使用之氣體。

並列摘要


InGaN multiquantum well (MQW) generally was increased electron-hole pair injected into active region. InGaN is causing the crystalline quality and to decrease the internal quantum efficiency, so uses the gradient-stage construction to improve the crystalline quality. A internal electric field perpendicular in c-plane GaN-based led is Quantum Confine Stark Effect. it would result in lower light intensity. A-plane is nonpolar and will removed the Quantum Confine Stark Effect. And p-GaN is a important study. Activated the p-GaN to get high hole concentration, led’s light intensity would be better.In this thesis, we use thermal annealing to activate a-plane p-GaN. N2 and O2 is ambiance gas

並列關鍵字

LED GaN nonpolar annealing RTA

參考文獻


[1] S. Nakamura, T. Mukai and M. Senoh, “Thermal Annealing Effects on P-Type Mg-Doped GaN Films”, Jpn. J. Appl. Phys., Part 2, 31, 1991, L139-142.
[2] S. Nakamura, M. Senoh and T. Mukai, “Highly P-Typed Mg-Doped GaN Films Grown with GaN Buffer Layers”, Jpn. J. Appl. Phys., 30, 1991, L1708-1711.
[3] 王安邦,“InGaN/GaN超晶格電流分散層之InGaN/GaN多重量子
[5] P. Waltereit, O. Brandt, A. Trampert, H. T. Grahn, J. Menniger, M. Ramsteiner, M. Reiche, K. H. Ploog, “Nitride semiconductors free ofelectrostatic fields for efficient white light-emitting diodes”, Nature, VOL 406, 24 AUGUST 2000, 865-867.
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被引用紀錄


王文輝(2015)。大學運動場館營運績效評估之實證研究-以國立中正大學為例〔碩士論文,國立中正大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0033-2110201614021405

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