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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/27681

Title: Effects of Al-containing Intermediate III-nitride Strained Multilayers on the Threading Dislocation Density and Optical Properties of GaN Films
Authors: Jyh-Rong Gong;Su-Fen Tseng;Cheng-Wei Huang;Yu-Li Tsai;Wei-Tsai Liao;Cheng-Liang Wang;Bing-Hong Shi;Tai-Yuan Lin
Contributors: NTOU:Institute of Optoelectronic Sciences
Date: 2003-11-15
Issue Date: 2011-10-21T02:32:50Z
Publisher: Japanese Journal of Applied Physics
Abstract: Abstract:We report the influence of intermediate AlN/GaN, AlGaN/GaN or AlN/AlGaN strained multilayer structures on the threading dislocation (TD) density and optical properties of GaN films. A series of GaN films were deposited at 1050°C on (0001) sapphire substrates using intermediate AlN/GaN, AlGaN/GaN or AlN/AlGaN strained multilayer structures. Etching pit density (EPD) counts and transmission electron microscopic (TEM) studies show that the implementation of AlN/GaN and AlGaN/GaN in GaN films enables the blocking of TDs in the films very efficiently. Photoluminescence (PL) measurements exhibit the increment of near band edge emission intensity in the GaN films having Al0.5Ga0.5N/GaN or AlN/GaN intermediate strained multilayer structures. Cross-sectional TEM observations show that TD annihilation and de-multiplication processes play important roles in the TD density reduction in the GaN films having Al-containing strained multilayer structures.
Relation: 42(11), pp.6823-6826
URI: http://ntour.ntou.edu.tw/handle/987654321/27681
Appears in Collections:[光電科學研究所] 期刊論文

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