Phase transition and luminescence characteristics of dysprosium doped strontium stannate phosphor synthesized using hydrothermal method. Issue 7 (1st April 2023)

• Record Type: Journal Article
• Authors: Kaynar, Ümit H.; Coban, M.B.; Madkhli, A.Y.; Ayvacikli, M.; Can, N.
• Is Part Of: Ceramics international. Volume 49:Issue 7(2023)
• Page Start: 11641
• Page End: 11646
• Publication Date: 2023-04-01
• Subjects: Concentration quenching -- Dy ions -- Hydrothermal reaction -- Phase transition -- Resonant energy transfer -- Strontium stannate; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.12.011
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A series of strontium stannate (SrSnO3 ) doped with Dy 3+ ions at various wt % concentrations (1, 2, 3 and 5) were synthesized via hydrothermal reaction and analysed using X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), environmental electron scanning microscope (ESEM), photoluminescence (PL) and, cathodoluminescence (CL). The XRD results confirmed that all samples were assigned to cubic perovskite-type SrSnO3 structured with the P m 3 m ‾ space group. The PL emission spectrum of Dy 3+ activated samples consisted of some characteristic peaks located at 481 nm, 572 nm, 660 nm and 753 nm, corresponding to ( 4 F9/2 → 6 H15/2, blue), ( 4 F9/2 → 6 H13/2, yellow), 660 nm ( 4 F9/2 → 6 H11/2, red) and 753 nm ( 4 F9/2 → 6 H9/2, red) transitions. The PL emission line intensity is gradually enhanced with an increase in doping concentration up to 3 wt %, followed by concentration quenching. The confinement effects of localized resonant energy transfer might cause higher concentration quenching. PL emission spectra were affected by the temperature range from 10 K to 300 K. PL emission anomalies at 270 K in SrSnO3 :Dy 3+ have been reported to be consistent with a structural phase transition at this temperature. This work confirms Singh et al.'s observation, revealing that SrSnO3 has a phase transition at 270 K.