Anomalous red luminescence of Sm3+ ions in Sm3+:LaKNaTaO5 single crystals. (May 2018)

• Record Type: Journal Article
• Authors: Korzeniowski, Kamil; Sobczyk, Marcin
• Is Part Of: Solid state communications. Volume 273(2018)
• Page Start: 30
• Page End: 33
• Publication Date: 2018-05
• Subjects: A. Sm3+ -- A. Tantalates -- D. Luminescence -- D. Red phosphors; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.02.003
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: For the first time much more intense 4 G5/2 → 6 H9/2 transition than others 4 G5/2 → 6 HJ/2 transitions of the Sm 3+ -doped oxides have been observed. The Sm 3+ –doped LaKNaTaO5 single crystals have been grown by the flux growth method. The emission and excitation spectra as well as decay profiles of the 4 G5/2 luminescent level of the Sm 3+ ion have been measured. The decay curve has been fitted by the Inokuti-Hirayama energy transfer model which revealed that electric dipole-dipole interaction is responsible for the energy transfer processes in the Sm 3+ :LaKNaTaO5 single crystals. The title phosphors may be potentially used as red phosphor for white light-emitting diodes. Highlights: Sm 3+ :LaKNaTaO5 single crystals have been grown by the flux growth method. Sm 3+ :LaKNaTaO5 is a promising material for 405 nm pumped phosphor. Strong red emission correspond to the 4 G5/2 . → 6 H9/2 transition have been observed. Concentration quenching mechanisms and possible relaxation channels were discussed.