CaSnO3: Pr3+ phosphor for new application in temperature sensing

CaSnO3: Pr3+ phosphor for new application in temperature sensing was investigated. CaSnO3: 0.3%Pr3+ had distorted orthorhombic perovskite structure and Pr3+ occupied Ca2+ sites due to their similar ionic radii. CaSnO3: 0.3%Pr3+ had spherical particles with mean size of 0.816 μm. The electric dipole−dipole interaction could explain the concentration quenching mechanism. The chromaticity coordinates were (0.1324, 0.3847), located in greenish-blue region and the average afterglow decay time was 60.2 s for CaSnO3: 0.15%Pr3+, which had potential applications for LED and emergency lighting. CaSnO3: 0.3%Pr3+ had the activated energy of 0.380 eV. The maximum relative temperature sensitivity for CaSnO3: 0.3%Pr3+ was 7.57% K−1 at 298 K and relative sensitivity was as high as 6722.76/T2 K−1, which was better than that of most Pr3+ doped phosphors and had potential application in temperature sensing. Moreover, the possible luminescence and long afterglow mechanisms and thermal quenching process of 3P0 level through IVCT state were proposed. [Display omitted] •Pr3+ doped CaSnO3 phosphor for new application in temperature sensing.•Sr value of 6722.7557/T2 K−1 was better than that of most Pr3+ doped phosphors.•CaSnO3: 0.3%Pr3+ had spherical particles with mean particle size of 0.816 μm.•τavg is 60.2 s for CaSnO3: 0.15%Pr3+, potential application in emergency lighting.•Possible luminescence and long afterglow mechanisms were proposed.