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2017 | 132 | 4 | 1261-1264
Article title

Luminescence Properties of CaAl₂O₄:Eu³⁺, Gd³⁺ Phosphors Synthesized by Combustion Synthesis Method

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Abstracts
EN
CaAl₂O₄:Eu³⁺ (1 mol.%) co-doped with varying concentration of Gd³⁺ (1, 2, 5, and 10 mol.%) were prepared by combustion synthesis method at 600°C and further annealed at 1000°C. All the compositions were investigated for their structural and photoluminescence properties. It was observed that both states of europium i.e. Eu³⁺ and Eu²⁺ were present and ratio of these states changes on heating at 1000°C. The materials synthesized at 600°C showed high intense peak around 440 nm due to presence of Eu²⁺ and less intense peaks in the red region which were due to presence of Eu³⁺. On annealing the compounds at 1000°C, intensity of peak around 440 nm decreases and intensity of peaks in the red region increases significantly. The ⁵D₀ → ⁷F₃ transition due to Eu³⁺ at 657 nm appears as the highest intensity peak. All co-doped samples annealed at 1000°C showed the higher intensity than the mono doped sample which is due to energy transfer from the Gd³⁺ to Eu³⁺. The second rare-earth ion (Gd³⁺) acts as sensitizer and enhances the photoluminescence intensity. The X-ray diffraction spectra reveal the monoclinic phase of CaAl₂O₄ in all the samples which showed that Eu³⁺ and Gd³⁺ do not change the crystalline structure of calcium aluminate.
Publisher

Year
Volume
132
Issue
4
Pages
1261-1264
Physical description
Dates
published
2017-10
received
2016-08-22
(unknown)
2017-10-09
Contributors
author
  • Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India
author
  • Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India
author
  • Institut de Disseny per la Fabricació Automatitzada, Departament de Física Aplicada, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain
author
  • Institut de Disseny per la Fabricació Automatitzada, Departament de Física Aplicada, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain
author
  • Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India
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Document Type
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Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv132n4p09kz
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