Passivation Mechanism of Nitrogen in ZnO under Different Oxygen Ambience
Passivation Mechanism of Nitrogen in ZnO under Different Oxygen Ambience
复制标题
不同氧环境下ZnO中氮的钝化机理
DOI:
10.3390/cryst9040204
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发表时间:
2019-04
期刊:
影响因子:
2.7
通讯作者:
Gong Qian
中科院分区:
文献类型:
--
作者:
Chen Xingyou;Zhang Zhenzhong;Zhang Yunyan;Yao Bin;Li Binghui;Gong Qian
Nitrogen-doped ZnO thin films were grown on a-plane Al2O3 by plasma-assisted molecular beam epitaxy. Hall-effect measurements indicated that the nitrogen-doped ZnO films showed p-type behavior first, then n-type, with the growth conditions changing from oxygen-radical-rich to oxygen-radical-deficient ambience, accompanied with the increase of the N/O ratio in the plasmas. The increasing green emission in the low temperature photoluminescence spectra, related to single ionized oxygen vacancy in ZnO, was ascribed to the decrease of active oxygen atoms in the precursor plasmas. CN complex, a donor defect with low formation energy, was demonstrated to be easily introduced into ZnO under O-radical-deficient ambience, which compensated the nitrogen-related acceptor, along with the oxygen vacancy.
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