Enhanced photoluminescence of SiO2 coated CaTiO3:Dy3+, Li+ nanophosphors for white light emitting diodes. Issue 7 (1st April 2021)

• Record Type: Journal Article
• Authors: Shanbhag, Vijaya V.; Prashantha, S.C.; Shekhar, T.R. Shashi; Nagabhushana, H.; Naik, Ramachandra; Girish, K.M.; Ashwini, S.; Rangappa, Dinesh; Prasanna, D.S.
• Is Part Of: Ceramics international. Volume 47:Issue 7(2021)Part B
• Page Start: 10346
• Page End: 10354
• Publication Date: 2021-04-01
• Subjects: CaTiO3:Dy3+ -- Li+ co-doping -- SiO2 core shell -- CIE and CCT; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.11.077
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Systematic analysis of SiO2 @CaTiO3 :Dy 3+ (3 mol %) :Li + (0.25–1 mol %) core shell nanoparticles (C–S NPs) were carried out. CaTiO3 :Dy 3+ (3 mol %), Li + (0.25–1 mol %) NPs were prepared using low temperature solution combustion method. C–S structured samples were synthesized using SiO2 in equal weight quantities. All samples were characterised by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) in order to study and compare its structural properties. Photoluminescence (PL) properties of uncoated and SiO2 coated samples were studied in detail and optimum luminescence behaviour was investigated. Higher luminescence intensity is observed for codoped CaTiO3 :Dy 3+ (3 mol %) :Li + (0.5 mol %) sample. Further enhancement was observed in SiO2 @CaTiO3 :Dy 3+ :Li + structured nanoparticles. Emission spectra of SiO2 @CaTiO3 :Dy 3+ (3 mol %) :Li + (0.25–1.0 mol %) C–S nanophosphors exhibit white emission dominated by 4 F9/2 → 6 H13/2 (570 nm) transition of Dy 3+ ions under. All the results suggested that the present material provides a platform for fabricating new functional materials which can be applied in the field of wLEDs and solid state display applications.