Effects of V/III ratio on a-plane GaN epilayers with an InGaN interlayer
Effects of V/III ratio on a-plane GaN epilayers with an InGaN interlayer
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V/III 比对具有 InGaN 中间层的 a 面 GaN 外延层的影响
DOI:
10.1088/1674-1056/23/2/026801
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发表时间:
2014-02
影响因子:
1.7
通讯作者:
Wang Zhan-Guo
中科院分区:
文献类型:
--
作者:
Wei Hong-Yuan;Jiao Chun-Mei;Zhu Qin-Sheng;Wang Zhan-Guo
The effects of V/III growth flux ratio on a-plane GaN films grown on r-plane sapphire substrates with an InGaN interlayer are investigated. The surface morphology, crystalline quality, strain states, and density of basal stacking faults were found to depend heavily upon the V/III ratio. With decreasing V/III ratio, the surface morphology and crystal quality first improved and then deteriorated, and the density of the basal-plane stacking faults also first decreased and then increased. The optimal V/III ratio growth condition for the best surface morphology and crystalline quality and the smallest basal-plane stacking fault density of a-GaN films are found. We also found that the formation of basal-plane stacking faults is an effective way to release strain.
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