A source of free holes in NiO thin films with different nickel content that are prepared using the sol-gel method

被引：13
|
作者：
Lin, Yow-Jon [1 ]
Su, Ting-Hong [1 ]
Kuo, Po-Chih [1 ]
Chang, Hsing-Cheng [2 ]
机构：
[1] Natl Changhua Univ Educ, Inst Photon, Changhua 50007, Taiwan
[2] Feng Chia Univ, Dept Automat Control Engn, Taichung 407802, Taiwan
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2022年 / 276卷
关键词：
Electrical properties; Semiconductors; Chemical synthesis; NiO; SUBSTRATE-TEMPERATURE; OPTICAL-PROPERTIES; OXIDE; NANOPARTICLES; SURFACE;
D O I：
10.1016/j.matchemphys.2021.125345
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of nickel content on the electrical properties of the sol-gel grown NiO films is determined. NiO is a metal-deficient and oxygen-rich metal oxide. An increase in the concentration of nickel acetate during the growth process leads to an increase in the thickness of NiO films, so the crystallite size and the hole concentration increase. There is a change in the hole concentration in NiO films because there is competition between the density of nickel vacancies (VNi), oxygen interstitials and Ni3+. Transformation from Ni2+ to Ni3+ is an offset to the induced lattice relaxation due to transformation from V-Ni to V-Ni(2-), so V-Ni and Ni3+ coexist in NiO. The results of this study show the defect-related p-type conductivity of NiO films.
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页数：7
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