Luminescent characteristics of UV excited Sr0.5Ca0.5TiO3: Pr3+ reddish-orange phosphor

作者：Vidyadharan Viji; Mohan Remya P; Joseph Cyriac; Unnikrishnan N V; Biju P R^*

来源：Materials Chemistry and Physics, 2016, 170: 38-43.

DOI：10.1016/j.matchemphys.2015.12.016

• Optical materials
• Luminescence
• Optical properties
• Photoluminescence spectroscopy

Pr3+ doped Sr0.5Ca0.5TiO3 phosphors were synthesised by solid state reaction process. The structure, surface morphology and photoluminescence of the prepared phosphors were analysed using XRD, SEM and photoluminescence spectroscopy respectively. The XRD pattern confirmed orthorhombic perovskite structure of the Sr0.5Ca0.5TiO3: x Pr3+ phosphor. Agglomeration of particles with irregular shapes is observed from the SEM images. The emission spectra of Sr0.5Ca0.5TiO3: x Pr3+ phosphor shows the samples can be effectively excited with UV light at 336 nm and exhibit a strong reddish-orange emission at 611 nm. Concentration dependence of emission intensity shows concentration quenching effect on increasing Pr3+ concentration after x = 0.1 because of dipole-dipole interaction. Using Blasse's formula, critical distance for energy transfer was calculated. The CIE co-ordinates, CCT, colour purity and luminescence decay of the prepared phosphors were also calculated. These results offer the prepared phosphor as a suitable candidate for various photonic applications.

• 出版日期2016-2-15