A study of optothermal and AC impedance properties of Cr-doped Mn3O4 sprayed thin films

被引：26

作者：

Larbi, T. ^{[1
]}

Amara, A. ^{[1
]}

Ben Saida, L. ^{[1
,2
]}

Ouni, B. ^{[1
]}

Lakhdar, M. Haj ^{[1
]}

Amlouk, M. ^{[1
]}

机构：

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

[2] Univ Carthage, Fac Sci Bizerte, Carthage, Tunisia

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 70卷

关键词：

Thin films; Microstructure; Impedance spectroscopy; Thermal conductivity; MANGANESE OXIDE; PHYSICAL INVESTIGATIONS; VALENCE; CONDUCTIVITY; ELECTRODES; MECHANISM; STATE;

D O I：

10.1016/j.materresbull.2015.04.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Chrome-doped Mn3O4 thin films were grown on the glass substrates by the spray pyrolysis technique at 350 degrees C. XRD diffraction and Raman spectroscopy analysis revealed that all samples have tetragonal spinel structure with a preferred orientation along the direction (1 0 1). Absorption coefficient has been measured using both transmission and mirage effect. The band gap energy decreases from 2.2 to 1.9 eV with Cr content while Urbach energy value increases from 354 to 473 meV. Also, thermal conductivity was evaluated. Finally, physical properties have been evaluated and discussed in terms of alteration of the band gap edges, electrical patterns and mirage effect. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：254 / 262

页数：9

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