Effects of thin heavily Mg-doped GaN capping layer on ohmic contact formation of p-type GaN
Effects of thin heavily Mg-doped GaN capping layer on ohmic contact formation of p-type GaN
复制标题
薄重镁掺杂 GaN 覆盖层对 p 型 GaN 欧姆接触形成的影响
DOI:
10.1088/0268-1242/28/10/105020
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发表时间:
2013-10
影响因子:
1.9
通讯作者:
Yang, H.
中科院分区:
文献类型:
--
作者:
Zhu, J. J.;Wang, H.;Zhang, B. S.;Yang, H.
The growth condition of thin heavily Mg-doped GaN capping layer and its effect on ohmic contact formation of p-type GaN were investigated. It is confirmed that the excessive Mg doping can effectively enhance the Ni/Au contact to p-GaN after annealing at 550 °C. When the flow rate ratio between Mg and Ga gas sources is 6.4% and the layer width is 25 nm, the capping layer grown at 850 °C exhibits the best ohmic contact properties with respect to the specific contact resistivity (ρc). This temperature is much lower than the conventional growth temperature of Mg-doped GaN, suggesting that the deep-level-defect induced band may play an important role in the conduction of capping layer.
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影响因子:
4
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通讯作者:
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影响因子:
3.2
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通讯作者:
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通讯作者:
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通讯作者:
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