Phosphors with different morphology, formed under hydrothermal conditions on the basis of ZrO2:Eu3+ nanocrystallites
https://doi.org/10.17586/2220-8054-2019-10-6-654-665
Abstract
Eu3+-doped ZrO2 nanostructures in the form of rods, stars, and hollow spheres were prepared by varying hydrothermal conditions. X-ray diffraction, transmission electron microscopy, ultraviolet-visible diffuse reflection spectroscopy, a low-temperature nitrogen adsorption method, Raman spectroscopy and photoluminescence spectra were used to characterize the polymorph modification, surface and optical properties of the Zr0.98Eu0.02O2 nanophosphors. The Eu3+ content in a zirconia monoclinic lattice, remained constant for all types of obtained nanostructures in order to reveal the morphology influence on the efficiency of electronic excitation energy transfer from the host matrix to photoactive centers. The decrease of the average size of the coherent scattering regions in the series rods → stars → hollow spheres, is associated with increasing the specific surface area values. At that, in the photoluminescence spectrum, the splitting of the sublevels associated with the monoclinic lattice 5D0 → 7F1 disappears.
Keywords
hydrothermal synthesis,
monoclinic zirconia,
europium,
solid solution,
rods,
stars,
hollow spheres,
nanocrystals,
energy gap,
photoluminescence,
lifetime
Supporting agencies: Alexander N. Bugrov appreciates the Russian Foundation for Basic Research (grant No. 16-33-60227) for the financial support Ruslan Smyslov is thankful for his funding received from the EU-H2020 research and innovation program under grant agreement No. 654360, having benefitted from the access provided by CEA/LETI in Grenoble within the framework of the NFFA-Europe Transnational Access Activity. X-ray diffraction experiments were performed on the Engineering Center equipment of the St. Petersburg State Technological Institute (Technical University). TEM studies were carried out in the Federal Joint Research Center “Material science and characterization in advanced technology” funded by the Ministry of Education and Science of the Russian Federation (id RFMEFI62117X0018)
About the Authors
A. N. Bugrov
Institute of Macromolecular Compounds RAS; Saint Petersburg Electrotechnical University “LETI”
Russian Federation
Russian Federation
Bolshoy pr. 31, 199004 St. Petersburg; ul. Professora Popova 5, 197376 St. Petersburg
R. Yu. Smyslov
Institute of Macromolecular Compounds RAS; Peter the Great St. Petersburg Polytechnic University
Russian Federation
Russian Federation
Bolshoy pr. 31, 199004 St. Petersburg; Polytechnicheskaya ul. 29, 195251 St. Petersburg
T. V. Khamova
Grebenshchikov Institute of Silicate Chemistry RAS
Russian Federation
Russian Federation
Makarova nab. 2., letter B, 199034 St. Petersburg
D. A. Kirilenko
Ioffe Institute RAS; ITMO University
Russian Federation
Russian Federation
Politekhnicheskaya ul. 26, 194021 St. Petersburg; Kronverskii avenue 49, 197101 St. Petersburg
I. A. Rodionov
Institute of Chemistry, Saint Petersburg State University
Russian Federation
Russian Federation
Universitetskii prospect 26, Petergof, 198504 St. Petersburg
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Review
For citations:
Bugrov A.N., Smyslov R.Yu., Khamova T.V., Kirilenko D.A., Rodionov I.A. Phosphors with different morphology, formed under hydrothermal conditions on the basis of ZrO2:Eu3+ nanocrystallites. Nanosystems: Physics, Chemistry, Mathematics. 2019;10(6):654-665. https://doi.org/10.17586/2220-8054-2019-10-6-654-665
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