NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (6), P. 783–788
Spectral-kinetic properties of LaF3 nanoparticles doped with Ce3+ and Sm3+ ions after microwave treatment and in core-shell structure
E. I. Madirov – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia; ed.madirov@gmail.com
E.V. Lukinova – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia
A. S. Nizamutdinov – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia
M. S. Pudovkin – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia
S. L. Korableva – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia
V.V. Semashko – Kazan Federal University, Institute of Physics, 18, Kremlevskaja str., Kazan, 420008, Russia
Crystalline LaF3:Sm3+ and LaF3:Ce3+ nanoparticles were fabricated via a co-precipitation method. The obtained nanoparticles were 15 – 20 nm and had good crystallinity. Spectral-kinetic properties of crystalline LaF3 nanoparticles activated with 5 % Sm3+ and 12 % Ce3+ ions were studied. Various duration of the microwave treatment as well as core-shell structure were studied as possible ways to control quenching in the nanoparticles. In case of the LaF3:Sm3+ nanoparticles, the additional microwave treatment increased the average luminescence life-time by 6 % and addition of the LaF3 shell increased it by 18 %. In case of the LaF3:Ce3+ sample, microwave treatment increased the average lifetime by up to 20 %. The observed effects of varying the synthetic conditions and composite core-shell structure on luminescence properties of nanoparticles provide a means to manage the energy loss in the nanoparticles due to the quenching factors.
Keywords: nanoparticle, rare-earth ions, fluoride, samarium, cerium.
PACS 81.07.Bc, 76.30.Kg
DOI 10.17586/2220-8054-2018-9-6-783-788