https://doi.org/10.15407/jopt.2016.51.104

Optoelectron. Semicond. Tech. 51, 104-112 (2016)

O.N. Marchylo, L.V. Zavyalova, Y. Nakanishi, H. Kominami, K. Hara, S.V. Svechnikov, B.A. Snopok, A.E. Beliaev

RED-EMITTING PHOSPHORS BASED ON SrTiO3:Pr3+PREPARED BY SOL-GEL METHOD

Sol-gel technology for production of red-emitting phosphors based on SrTiO3:Pr3+ has been developed. Photo- and cathodoluminescence emission of samples with different contents of the activator Pr3+ were investigated. It has been ascertained that the maximum value of brightness of luminescence can be achieved under the optimal concentration of Pr3+ equal to 0.2 mol.% and annealing temperature 1300 °C. The possible mechanisms to improve the emission efficiency of crystal-based perovskite matrix with rare-earth ions are discussed as well. Finally, nanodispersed cathodophosphors with high more than 1500 cd/m2 brightness have been obtained being based on redemitting phosphor based on nanostructured crystalline SrTiO3:Pr3+. It allowed practical implementation of the concept of an optical converter for silicon UV sensors.

Keywords: crystal phosphors, SrTiO3:Pr, sol-gel method, photoluminescence, optical converter, ultraviolet.