Nanosystems: Phys. Chem. Math., 2024, 15 (5), 702–709
Highly dispersed anti-Stokes phosphors based on KGd2F7:Yb,Er single-phase solid solutions
Anna S. Zakharova – Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow; Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow; National Research University Higher School of Economics, Moscow, Russia
Sergey V. Kuznetsov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Alexander A. Alexandrov – Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow; Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Daria V. Pominova – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Valery V. Voronov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Pavel P. Fedorov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Vladimir K. Ivanov – Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia
Corresponding author: Anna S. Zakharova, AnyaZakharova2606@mail.ru
PACS 61.46 Df
DOI 10.17586/2220-8054-2024-15-5-702-709
ABSTRACT The possibility of doping the KGd2F7 matrix with ytterbium and erbium ions by introducing yttrium ions with a concentration of 25 mol.% was confirmed and the conditions were determined for the synthesis of anti-Stokes phosphors based on single-phase KGd2F7:Yb,Er solid solutions. The dependences were revealed of the sizes of coherent scattering regions, crystal lattice parameters, and energy yield of luminescence on the temperature and duration of heat treatment. Heat treatment conditions were determined to ensure the achievement of intense anti-Stokes luminescence. As a result, effective phosphors KGd2F7:Yb (20.0 mol.%),Er (4.0 mol.%) with an energy yield of up-conversion luminescence of 3.80 % were developed. Disordering of the crystal structure (transition from cubic to tetragonal modification) at a temperature of 600 °C was recorded, corresponding to the rule of Ostwald steps.
KEYWORDS inorganic fluorides, anti-Stokes luminescence, KGd2F7, co-precipitation technique, ytterbium, erbium
ACKNOWLEDGEMENTS The study was supported by the Russian Science Foundation (grant No. 22-13-00167). The analysis of the composition, structure and properties of the materials obtained was carried out using the equipment of the JRC PMR IGIC RAS.
FOR CITATION Zakharova A.S., Kuznetsov S.V., Alexandrov A.A., Pominova D.V., Voronov V.V., Fedorov P.P., Ivanov V.K. Highly dispersed anti-Stokes phosphors based on KGd2F7:Yb,Er single-phase solid solutions. Nanosystems: Phys. Chem. Math., 2024, 15 (5), 702–709.
[In Russian] Захарова А.С., Кузнецов С.В., Александров А.А., Поминова Д.В., Воронов В.В., Фёдоров П.П., Иванов В.К.
Высокодисперсные антистоксовые люминофоры на основе однофазных твердых растворов KGd2F7:Yb,Er
АННОТАЦИЯ Подверждена возможность легирования матрицы KGd2F7 ионами иттербия и эрбия с помощью введения в неё ионов иттрия с концентрацией 25 мол.% и определены условия синтеза антистоксовых люминофоров на основе однофазных твёрдых растворов KGd2F7:Yb,Er. Выявлена зависимость размеров областей когерентного рассеяния, параметров кристаллической решетки и энергетического выхода люминесценции от температуры и длительности термообработки. Определены условия термообработки, обеспечивающие достижение интенсивной антистоксовой люминесценции. В результате разработаны эффективные люминофоры KGd2F7:Yb(20,0 мол.%),Er(4,0 мол.%) с энергетическим выходом ап-конверсионной люминесценции 3,80%. Зафиксировано разупорядочение кристаллической структуры (переход из кубической в тетрагональную модификацию) при температуре 600 °С, соответствующее правилу ступеней Оствальда.
КЛЮЧЕВЫЕ СЛОВА неорганические фториды, антистоксова люминесценция, KGd2F7, метод соосаждения, иттербий, эрбий.
