Physical properties investigation and gas sensing mechanism of Al: Fe2O3 thin films deposited by spray pyrolysis

被引：19

作者：

Ben Ayed, Rihab ^{[1
]}

Ajili, Mejda ^{[1
]}

Garcia, Jorge M. ^{[2
]}

Labidi, Ahmed ^{[3
]}

Turki, Najoua Kamoun ^{[1
]}

机构：

[1] Univ Tunis El Manar, Fac Sci Tunis, Dept Phys, LR99ES13 Lab Phys Matiere Condensee LPMC, Tunis 2092, Tunisia

[2] CSIC, CNM, Inst Micro & Nanotecnol Madrid, PTM, C Isaac Newton 8, Madrid 28760, Spain

[3] Univ Carthage, IPEST, Lab Mat Mol & Applicat, BP51 La Marsa, Tunis 2070, Tunisia

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2019年 / 129卷

关键词：

Iron oxide; Spray pyrolysis; Aluminum doping; Physical properties; Gas sensing; OPTICAL-PROPERTIES; IRON-OXIDE; TEMPERATURE; GREEN;

D O I：

10.1016/j.spmi.2019.03.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present the successful synthesis and characterization of pure and Al: Fe2O3 thin films prepared by spray pyrolysis. The XRD analysis showed a rhomboedric structure with (104) as a preferential orientation for all the layers. AFM and SEM observations exhibited a dense surface with grains uniformly distributed. Optical measurements demonstrated that Al: Fe2O3 (y = 6 and 8 at. %) were highly transparent. In addition, the band gaps values found in the range from 1.98 to 2.17 eV. Hall Effect measurements indicated an n-type conductivity with the lowest resistivity of 2.68 x 10(2)Omega.cm which reached for the 8 at. % Al: Fe2O3 thin films. Moreover, Al: Fe2O3 thin film based sensor demonstrated a good response to a small amount of ethanol vapor with the adequate response and recovery period at a low operating temperature equal to 250 degrees C.

引用

页码：91 / 104

页数：14

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