Polycrystalline La0.8Sr0.2GaO3 perovskite synthesized by sol-gel process along with temperature dependent photoluminescence

被引：11

作者：

Belkhiria, F. ^{[1
]}

Rhouma, F. I. H. ^{[1
]}

Hcini, S. ^{[2
,3
]}

Daoudi, M. ^{[4
]}

Gammoudi, H. ^{[1
]}

Amlouk, M. ^{[5
]}

Chtourou, R. ^{[1
]}

机构：

[1] Univ Tunis El Manar, Lab Nanomat & Syst Energies Renouvelables, Ctr Rech & Technol Energie, BP95, Hammam Lif 2050, Tunisia

[2] Univ Kairouan, Fac Sci & Tech Sidi Bouzid, Unite Rech Valorisat & Optimisat Exploitat Ressou, Campus Univ Cite Agr, Sidi Bouzid 9100, Tunisia

[3] Univ Gafsa, Dept Phys, Fac Sci Gafsa, Campus Univ, Sidi Ahmed Zarroug 2112, Gafsa, Tunisia

[4] Ctr Natl Sci & Technol Nucl, Lab Rech Energie & Mat Dev Sci Nucl, Sidi Thabet 2020, Tunisia

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

来源：

JOURNAL OF LUMINESCENCE | 2017年 / 181卷

关键词：

La0.8Sr0.2GaO3; Rietveld refinement; Photoluminescence property; Sol-gel process; Activation energy; DOPED LAGAO3; OPTICAL-PROPERTIES; OXYGEN DIFFUSION; CONDUCTION; BEHAVIOR; POWDERS; BLUE;

D O I：

10.1016/j.jlumin.2016.08.045

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This work covers for the first time the protocol of the preparation of nominal composition La0.8Sr0.2GaO3 by the sol-gel method using the citric acid. The structural and the optical properties were investigated, by X-ray diffraction (XRD), Fourier Transform infrared Spectroscopy (FT-IR) and Photoluminescence Spectroscopy (PL) techniques, respectively. The Rietveld refinement, from the X-ray diffraction patterns, showed the presence of La0.63Sr0.21Ga0.95O2.68 perovskite as a major phase which crystallizes in an Hexagonal structure and the appearance of minor impurity phase identified as Gallium Lanthanum Oxide (La4Ga2O9) belonging to a Monoclinic structure. Two peaks indicating blue photoluminescence emission were observed at room temperature. One emission was related to secondary phase and the other was assigned rather to the oxygen deficiency in perovskite structure, leading to the formation of intermediary energy levels in the band gap. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

共 32 条

[1] Synthesis and characterization of Sr2+ and Mg2+ doped LaGaO3 by co-precipitation method followed by hydrothermal treatment for solid oxide fuel cell applications [J].