For citations:
Gushchin S.V., Ryabochkina P.A., Lyapin A.A., Kuznetsov S.V., Konyushkin V.A., Nakladov A.N., Proydakova V.Yu. Features of up-conversion luminescence in concentration series of SrF2–ErF3 single crystals and nanoparticles under excitation at the 4I11/2 level of Er3+ ions. Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering. 2024;27(4):348-357. (In Russ.) https://doi.org/10.17073/1609-3577j.met202408.607