M. K. Bubnov, S. A. Bukarev, S. V. Gushchin, V. A. Konyushkin, S. V. Kuznetsov, A. A. Lyapin, A. N. Nakladov, P. A. Ryabochkina, V. V. Voronov, P. P. Fedorov, “Up-conversion luminescence of CaF$_2$–SrF$_2$–HoF$_3$ solind solutions upon excitation of the $^5I_7$ level of Ho$^{3+}$ ions”, Optics and Spectroscopy, 2023, Volume 131, Issue 3,Pages 346

Spectroscopy of condensed matter

Up-conversion luminescence of CaF$_2$–SrF$_2$–HoF$_3$ solind solutions upon excitation of the $^5I_7$ level of Ho$^{3+}$ ions

M. K. Bubnov^a, S. A. Bukarev^a, S. V. Gushchin^a, V. A. Konyushkin^b, S. V. Kuznetsov^bc, A. A. Lyapin^a, A. N. Nakladov^b, P. A. Ryabochkina^a, V. V. Voronov^b, P. P. Fedorov^b

^a Ogarev Mordovia State University, 430005 Saransk, Russia
^b Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
^c Kazan Federal University, Kazan, Tatarstan, Russia

Abstract: Up-conversion luminescence spectra of CaF$_2$–SrF$_2$–HoF$_3$ single crystals were investigated upon excitation by laser radiation with a wavelength of 1940 nm to the $^5I_7$ level of Ho$^{3+}$ ions. The CaF$_2$–SrF$_2$–HoF$_3$ single crystals were grown by the vertical directional crystallization method. For these excitation conditions, quantitative characteristics of the up-conversion luminescence of Ho$^{3+}$ ions were determined: energy yield, chromaticity coordinates, and correlated color temperatures. The possibility of increasing the efficiency of solar cells due to the conversion of infrared radiation in CaF$_2$–SrF$_2$–HoF$_3$ crystals was considered.

Keywords: up-conversion luminescence, rare-earth ions, fluorides, luminescence yield.

Received: 05.09.2022
Revised: 26.12.2022
Accepted: 10.01.2023

DOI: 10.21883/OS.2023.03.55384.4085-22