Influence Ca-doped SrIn2O4 powders on photoluminescence property prepared one step by ultrasonic spray pyrolysis
| العنوان: | Influence Ca-doped SrIn2O4 powders on photoluminescence property prepared one step by ultrasonic spray pyrolysis |
|---|---|
| المؤلفون: | A.A.G. Santiago, Fabiana V. Motta, Máximo Siu Li, Elson Longo, P.N. Medeiros, Mauricio R. D. Bomio, E.A.C. Ferreira |
| المصدر: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| بيانات النشر: | Elsevier, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Photoluminescence, Materials science, Analytical chemistry, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Materials Chemistry, SINTERIZAÇÃO, Emission spectrum, Indate, Chromaticity, Porosity, Optical Properties, Ultrasonic spray pyrolysis, Mechanical Engineering, Doping, Metals and Alloys, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Field electron emission, Mechanics of Materials, Strontium, Orthorhombic crystal system, Diffuse reflection, 0210 nano-technology |
| الوصف: | Crystalline Ca-doped SrIn2O4 structures were prepared by a rapid and efficient Ultrasonic Pyrolysis Spray (USP) method. The Sr1-xCaxIn2O4 (x = 0, 0.1, 0.2, 0.3, 0.4 and 1 mol %) samples were obtained by in a single step at a temperature of 1050 °C for 1 min for the formation of particles. The powders were characterized by X-ray diffraction (XRD), field emission electron microscopy (SEM-FEG), optical diffuse reflectance and photoluminescence (PL) measurements. All diffraction peaks present in XRD patterns could be indexed to the orthorhombic structure and that with calcium percentage increments indicates the substitution of Ca2+ in the Sr2+ sites promotes a decrease in its lattice parameters of the structure. MEV-FEG images show that the Sr1-xCaxIn2O4 particles have a spherical predominance, with a porous surface in the form of foam for x = 0 and a surface with low roughness and low porosity with an increase in the percentage of Ca2+ ion, especially for the 1 mol % of Ca2+. The gap energy varied between 4.56 eV and 4.86 eV, being influenced by the structural modifications motivated by increase of Ca2+ ion contained in the SrIn2O4 matrix. The PL emission spectrum of the samples presents a broad band behavior with emission intensity predominant in the blue-green region, having the sample with x = 0.1 the highest PL intensity. The chromaticity coordinates were calculated for the sample based on the PL spectrum and coordinates x and y show that the samples have blue emission. Ultrasonic spray pyrolysis was an effective technique for Ca-doped SrInO4 powder production using short production times with hold great potential for photoluminescent emitters. |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0a14b15e3702e00331222cb8929e3fb https://repositorio.ufrn.br/handle/123456789/43766 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....f0a14b15e3702e00331222cb8929e3fb |
| قاعدة البيانات: | OpenAIRE |
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The Sr1-xCaxIn2O4 (x = 0, 0.1, 0.2, 0.3, 0.4 and 1 mol %) samples were obtained by in a single step at a temperature of 1050 °C for 1 min for the formation of particles. The powders were characterized by X-ray diffraction (XRD), field emission electron microscopy (SEM-FEG), optical diffuse reflectance and photoluminescence (PL) measurements. All diffraction peaks present in XRD patterns could be indexed to the orthorhombic structure and that with calcium percentage increments indicates the substitution of Ca2+ in the Sr2+ sites promotes a decrease in its lattice parameters of the structure. MEV-FEG images show that the Sr1-xCaxIn2O4 particles have a spherical predominance, with a porous surface in the form of foam for x = 0 and a surface with low roughness and low porosity with an increase in the percentage of Ca2+ ion, especially for the 1 mol % of Ca2+. The gap energy varied between 4.56 eV and 4.86 eV, being influenced by the structural modifications motivated by increase of Ca2+ ion contained in the SrIn2O4 matrix. The PL emission spectrum of the samples presents a broad band behavior with emission intensity predominant in the blue-green region, having the sample with x = 0.1 the highest PL intensity. The chromaticity coordinates were calculated for the sample based on the PL spectrum and coordinates x and y show that the samples have blue emission. 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