Red-emitting phosphors based on SrTiO3:Pr3+ prepared by sol-gel method - O. N. Marchilo; L. V. Zavjalova; Jo. Nakanishi; Kh. Kominami; K. Khara; B. A. Snopok; S. V. Svechnikov; A. E. Beljaev (Optoelectronics and Semiconductor Technique, 2016)