Microstructural, optical and ethanol sensing properties of sprayed Li-doped Mn3O4 thin films

被引：32

作者：

Amara, M. A. ^{[1
]}

Larbi, T. ^{[1
]}

Labidi, A. ^{[2
]}

Karyaoui, M. ^{[3
]}

Ouni, B. ^{[1
]}

Amlouk, M. ^{[1
]}

机构：

[1] Tunis El Manar Univ, Fac Sci Tunis, Unite Phys Dispositifs Semicond, Tunis 2092, Tunisia

[2] IPEST, Unite Rech Phys Semicond & Capteurs, Tunis 2070, Tunisia

[3] Ctr Rech & Technol Energie, Lab Photovolta, Hammam Lif 2050, Tunisia

来源：

MATERIALS RESEARCH BULLETIN | 2016年 / 75卷

关键词：

Thin films; Optical properties; Raman spectroscopy; X-ray diffraction; defects; ELECTRICAL-PROPERTIES; CHEMICAL-SYNTHESIS; CO; TIO2; SNO2; NANOSTRUCTURES; TEMPERATURE;

D O I：

10.1016/j.materresbull.2015.11.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lithium-doped manganese oxide thin films have been deposited onto glass substrate by the spray pyrolysis technique. The effect on structural, morphological, optical and ethanol sensitivity properties of the films with different Li concentrations was investigated. The X-ray diffraction (XRD) studies of Li doped Mn3O4 thin films revealed polycrystalline tetragonal structure with lattice parameters: a= 5.73 angstrom and c= 9.46 angstrom. The most intense band at 653.26 cm-I observed in room temperature Raman spectrum of all films corresponds to the tetragonal crystal structure of Mn3O4. Optical band gap energy was found to vary in the range of 2.23-2.82 eV by an increase in Li-doping concentration up to 15%. The resistance based gas sensing measurements showed a clear response already at a low ethanol concentration of 0.1%. The films showed promising ethanol sensing behavior; especially the sample doped with 3% of lithium exhibits the most excellent sensing performance. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：217 / 223

页数：7