Impact of oxygen vacancies on enhanced NO2 gas sensing performance of lithium doped Co:ZnO thin films

被引：0
|
作者：
Jasmi, K. K. [1 ]
Johny, T. Anto [1 ]
Siril, V. S. [2 ]
Madhusoodanan, K. N. [2 ]
机构：
[1] Univ Calicut, St Thomas Coll Autonomous, Dept Phys, Trichur 680001, India
[2] Cochin Univ Sci & Technol, Dept Instrumentat, Cochin 682022, India
来源：
PHYSICA SCRIPTA | 2024年 / 99卷 / 06期
关键词：
electrical conductivity; Co-Li co-doping; NO2 gas sensing; oxygen vacancy; stability; selectivity; MAGNETIC SEMICONDUCTOR; OPTICAL-PROPERTIES; ZNO NANOPARTICLES; CO; SELECTIVITY;
D O I：
10.1088/1402-4896/ad4789
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This article explored the influence of lithium on cobalt-doped ZnO thin films fabricated via the sol-gel spin coating technique for NO2 gas sensing applications. The abundance of oxygen vacancies in ZnO can be proven by scanning electron microscopy, four-probe Hall measurements, photoluminescence spectroscopy, UV-visible spectroscopy, and x-ray photoelectron spectroscopy. The presence of lithium plays a crucial role in generating more oxygen vacancies in Co-doped ZnO was discussed. Among the fabricated samples, (Li-Co) co-doped ZnO exhibits better sensitivity (2940.17%), selectivity, repeatability, and stability (after 90 days) toward 75 ppm NO2 gas.
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页数：12
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