Investigation of the properties and formation process of a peculiar V-pit in HVPE-grown GaN film
Investigation of the properties and formation process of a peculiar V-pit in HVPE-grown GaN film
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HVPE 生长 GaN 薄膜中特殊 V 坑的性质和形成过程的研究
DOI:
10.1016/j.matlet.2017.03.170
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发表时间:
2017-07
影响因子:
3
通讯作者:
Xu Ke
中科院分区:
文献类型:
--
作者:
Zhang Min;Cai Demin;Zhang Yumin;Su Xujun;Zhou Taofei;Cui Miao;Li Chao;Wang Jianfeng;Xu Ke
Hexagonal V-pits with an inverted pyramid shape appear on the surface of a GaN film after etching by hot H3PO4. A regular structure that is different from the V-pit morphology is observed in the cathodoluminescence image. The carrier concentration and stress distributions are nonuniform inside the V-pit. Furthermore, no dominant dislocations or defects are observed in the facets or bottom area of the V-pits. An island coalescence process is considered to contribute to the formation of such V-pits, with the coalesced island facets changing from {1 01m} to {1 12m} at a concave state for the different growth velocities.
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