NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (3), P. 378–388
Phase composition and photoluminescence correlations in nanocrystalline ZrO2:Eu3+ phosphors synthesized under hydrothermal conditions
A. N. Bugrov – Institute of macromolecular compounds RAS, Bolshoy pr. 31, 199004, St. Petersburg; Saint Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376, St. Petersburg, Russia; firstname.lastname@example.org
R.Yu. Smyslov – Institute of macromolecular compounds RAS, Bolshoy pr. 31, 199004, St. Petersburg; Petersburg Nuclear Physics Institute, NRC KI, Orlova roscha mcr. 1, 188300, Gatchina, Leningrad region, Russia
A.Yu. Zavialova – Saint Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376, St. Petersburg; Saint Petersburg State Institute of Technology (Technical University), Moskovsky pr. 26, 190013, St. Petersburg, Russia
D. A. Kirilenko – Ioffe Institute RAS, Politekhnicheskaya ul. 26, 194021, St. Petersburg; ITMO University, Kronverskii av. 49, 197101, St. Petersburg, Russia
D.V. Pankin – Research park SPbU, Ulianovskaya 5, 198504, St. Petersburg, Russia
Luminescent zirconia nanoparticles with europium ion content 1 and 10 mol.% were synthesized under hydrothermal conditions. Annealing of ZrO2: 1 mol. Eu3+ nanoparticles made it possible to obtain a sample with a high monoclinic phase content up to 92 %. An increase in the concentration of Eu3+ ions introduced into the zirconia crystal lattice has made it possible to almost completely convert its monoclinic and tetragonal phases into cubic modification. The phase composition of the synthesized samples was determined by powder X-ray diffraction, electron microdiffraction, and Raman spectroscopy. Analysis of the crystallographic data and the luminescent spectra helped to reveal correlations between the ZrO2:Eu3+ nanophosphor structure and the energy redistribution of Eu3+ optical transitions at 614 – 626 nm and 606 – 633 nm wavelengths. In addition, a relationship was established between the phase composition of nanoparticles based on zirconia and the luminescence lifetime of Eu3+ ions.
Keywords: hydrothermal synthesis, solid solutions, zirconia, europium, phase transitions, nanoparticles, photoluminescence, fluorescence lifetime.
PACS 78.67. n; 78.67.Bf