Synthesis and Photoluminescence Properties of BaSnF6:Mn4+ Red Phosphor

Mn4+-activated BaSnF6 red phosphor was synthesized by the chemical reaction method from HF, H2O2, BaF2, KMnO4, and tin (Sn) metal plate. The structural and optical properties of the BaSnF6:Mn4+ phosphor were investigated using X-ray diffraction and electron paramagnetic resonance analyses, photoluminescence (PL), PL excitation (PLE), diffuse reflectance, and Raman scattering spectroscopies, and luminescence decay time measurement. Temperature dependence of the PL intensity was measured from T = 20 to 450 K and analyzed by taking into consideration the Bose-Einstein phonon occupation number. The PLE spectra were measured at T = 20 and 300 K and analyzed based on the Franck-Condon model. The zero-phonon line energies for the Mn4+ 3d(3) transitions in the BaSnF6 host were accurately determined and used to obtain the crystal field splitting of Dq= 1980 cm(-1) and Racah parameters of B = 420 cm(-1) and C = 4230 cm(-1). PL decay times were also measured at T = 20-450 K and analyzed based on the thermal quenching model. Comprehensive discussion was presented on the PL and Raman scattering phenomena in a family of the Ba-based hexafluorometallate phosphors. (c) 2016 The Electrochemical Society. All rights reserved.