TY - JOUR

T1 - Effect of SiO2 shell on photoluminescence enhancement of Eu3+ doped nanophosphor based on monoclinic Y2O3

AU - Костюков, Антон Иванович

AU - Shuvarakova, E. I.

AU - Нашивочников, Александр Александрович

AU - Рахманова, Мариана Ивановна

AU - Черепанова, Светлана Витальевна

AU - Ishchenko, Arcady

AU - Bedilo, Alexander F.

N1 - Acknowledgements: The studies were conducted using equipment of the Center of Collective Use “National Center of Catalyst Research”. The study was financially supported by the Russian Science Foundation, Project no. 22-73-00106. This work particularly was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis projects АААА-А21-121011390009-1, АААА-А21-121011390006-0, and AAAA-A21-121011390054-1, and partly by the Ministry of Science and Higher Education of the Russian Federation project 121031700313-8.

PY - 2023/12/5

Y1 - 2023/12/5

N2 - Surface SiO2 coating strategy was used to enhance the photoluminescent properties of Eu3+ doped nanophosphor based on monoclinic Y2O3. Laser-synthesized m-Y2O3:Eu3+ spherical nanoparticles with high crystallinity and diameter of ca. 18 nm were used as a core for the preparation of m-Y2O3:Eu3+@SiO2 core-shell structures. According to HRTEM and HAADF-STEM data, a thin SiO2 shell uniformly encapsulated the crystal core with a thickness of about 1.5 nm. The SiO2 shell increases the absolute photoluminescence quantum yield of Eu3+ at λ = 395 nm excitation from 14 % to 68 %. To the best of our knowledge, the obtained quantum yield exceeds the known values for Eu3+ doped oxide-based nanophosphors and is comparable to those of some other commercial red microphosphors. The SiO2 coating was shown to reduce the luminescence quenching effect associated with the annealing-induced migration of Eu3+ from the bulk to the surface of nanoparticles. The obtained results demonstrate that m-Y2O3:Eu3+@SiO2 core-shell nanoparticles with intense red luminescence have significant potential for use in LEDs, high resolution displays, bioimaging technologies and in other solid-state lighting applications.

AB - Surface SiO2 coating strategy was used to enhance the photoluminescent properties of Eu3+ doped nanophosphor based on monoclinic Y2O3. Laser-synthesized m-Y2O3:Eu3+ spherical nanoparticles with high crystallinity and diameter of ca. 18 nm were used as a core for the preparation of m-Y2O3:Eu3+@SiO2 core-shell structures. According to HRTEM and HAADF-STEM data, a thin SiO2 shell uniformly encapsulated the crystal core with a thickness of about 1.5 nm. The SiO2 shell increases the absolute photoluminescence quantum yield of Eu3+ at λ = 395 nm excitation from 14 % to 68 %. To the best of our knowledge, the obtained quantum yield exceeds the known values for Eu3+ doped oxide-based nanophosphors and is comparable to those of some other commercial red microphosphors. The SiO2 coating was shown to reduce the luminescence quenching effect associated with the annealing-induced migration of Eu3+ from the bulk to the surface of nanoparticles. The obtained results demonstrate that m-Y2O3:Eu3+@SiO2 core-shell nanoparticles with intense red luminescence have significant potential for use in LEDs, high resolution displays, bioimaging technologies and in other solid-state lighting applications.

KW - Core-shell

KW - Eu3+ luminescence

KW - Laser synthesis

KW - Monoclinic Y2O3

KW - Nanophosphor

KW - Quantum yield

KW - Silica

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85166182266&origin=inward&txGid=c81fe3cce4bdd52cd9a216d7efc2b1e2

U2 - 10.1016/j.jallcom.2023.171566

DO - 10.1016/j.jallcom.2023.171566

M3 - Article

VL - 966

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 171566

ER -