Effect of Gd 3+ , La 3+ , Lu 3+ Co-Doping on the Morphology and Luminescent Properties of NaYF 4 :Sm 3+ Phosphors.

Autor: Nosov VG; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Betina AA; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Bulatova TS; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Guseva PB; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Kolesnikov IE; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Orlov SN; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia.; Federal State Unitary Enterprise 'Alexandrov Research Institute of Technology', 72 Koporskoe Shosse, 188540 Sosnovy Bor, Russia.; Institute of Nuclear Industry, Peter the Great St. Petersburg Polytechnic University (SPbSU), 29, Polytechnicheskaya Street, 195251 St. Petersburg, Russia., Panov MS; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia.; Center for Biophysical Studies, Saint Petersburg State Chemical Pharmaceutical University, 14 Professor Popov Str., Lit. A, 197022 St. Petersburg, Russia., Ryazantsev MN; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia.; Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, 8/3 Khlopina Street, 194021 St. Petersburg, Russia., Bogachev NA; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Skripkin MY; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia., Mereshchenko AS; Saint-Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2023 Mar 07; Vol. 16 (6). Date of Electronic Publication: 2023 Mar 07.
DOI: 10.3390/ma16062157
Abstrakt: The series of luminescent NaYF 4 :Sm 3+ nano- and microcrystalline materials co-doped by La 3+ , Gd 3+ , and Lu 3+ ions were synthesized by hydrothermal method using rare earth chlorides as the precursors and citric acid as a stabilizing agent. The phase composition of synthesized compounds was studied by PXRD. All synthesized materials except ones with high La 3+ content (where LaF 3 is formed) have a β-NaYF 4 crystalline phase. SEM images demonstrate that all particles have shape of hexagonal prisms. The type and content of doping REE significantly effect on the particle size. Upon 400 nm excitation, phosphors exhibit distinct emission peaks in visible part of the spectrum attributed to 4 G 5/2 → 6 H J transitions (J = 5/2-11/2) of Sm 3+ ion. Increasing the samarium (III) content results in concentration quenching by dipole-dipole interactions, the optimum Sm 3+ concentration is found to be of 2%. Co-doping by non-luminescent La 3+ , Gd 3+ and Lu 3+ ions leads to an increase in emission intensity. This effect was explained from the Sm 3+ local symmetry point of view.
Databáze: MEDLINE
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