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    Multiple substitution strategies toward tunable luminescence in Lu2MgAl4SiO12:Eu2+ phosphors / Z. Ming, J. Qiao, M. S. Molokeev [et al.] // Inorg. Chem. - 2020. - Vol. 59, Is. 2. - P. 1405-1413, DOI 10.1021/acs.inorgchem.9b03142. - Cited References: 31. - This research is supported by the National Natural Science Foundation of China (Grants 51972118, 51722202, and 51572023), Natural Science Foundations of Beijing (Grant 2172036), and Fundamental Research Funds for the Central Universities (Grant FRF-TP-18-002C1) . - ISSN 0020-1669. - ISSN 1520-510X
   Перевод заглавия: Стратегии множественного замещения для перестраиваемой люминесценции в люминофорах Lu2MgAl4SiO12:Eu2+
Рубрики:
Physical and chemical processes
   Phosphors
   Luminescence
   Cations
   Ions
Аннотация: The equivalent or heterovalent substitution strategy is an efficient way to stimulate photoluminescence tuning or to optimize the luminescence performances of phosphor materials. Garnet-type compounds receive much attention as phosphor hosts because of their flexible structural frameworks. Herein, a garnet-type Lu2MgAl4SiO12:Eu2+ phosphor with broad-band blue-green emission is first explored with two-site occupation by varying the Eu2+ content. Two host-substitution approaches to controlling the luminescence behavior of Lu2MgAl4SiO12:Eu2+ phosphor are implemented. The cation substitution strategy of Ca2+ for Mg2+ achieves tunable emission from 463 to 503 nm together with broadening emission bands in Lu2Mg1–yCayAl4SiO12:Eu2+ phosphors. Moreover, chemical unit cosubstitution of [Ca2+–Ge4+] replacing [Lu3+–Al3+] results in Lu2–zCazMgAl4–zGezSiO12:Eu2+ phosphors, which induce a red shift of the emission peak of about 60 nm and a broadening in the emission spectra with increasing Ca2+ and Ge4+ concentrations. The possible photoluminescence tuning mechanism is ascribed to the coordination sphere variation in the EuO8 polyhedron depending on the changing neighboring cations. The proposed approaches on equivalent or heterovalent substitution can contribute to the development of Eu2+-activated garnet-type phosphors with regulation of the luminescence performance and further initiate research discovering new phosphors for white-light-emitting diodes.

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Держатели документа:
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russia
Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China

Доп.точки доступа:
Ming, Zhiqiang; Qiao, Jianwei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhao, Jing; Swart, Hendrik C.; Xia, Zhiguo
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