The influence of second coordination-sphere interactions on the luminescent properties of β-Ca3(PO4)2-related compounds

被引：20

作者：

Deyneko, Dina, V ^{[1
]}

Morozov, Vladimir A. ^{[1
]}

Zhukovskaya, Evgeniya S. ^{[1
]}

Nikiforov, Ivan, V ^{[1
]}

Spassky, Dmitry A. ^{[2
]}

Belik, Alexei A. ^{[3
]}

Lazoryak, Bogdan, I ^{[1
]}

机构：

[1] Lomonosov Moscow State Univ, Chem Dept, Moscow 119991, Russia

[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[3] Natl Inst Mat Sci, Res Ctr Funct Mat, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 815卷

基金：

俄罗斯科学基金会;

关键词：

Whitlockite; pc-LED; Crystal structure; Luminescence spectroscopy; Eu3+ 4f-4f emission; Crystallographic sites; Structural probe; ENERGY-TRANSFER; CRYSTAL-STRUCTURE; WHITE-LIGHT; PHOSPHOR; EU3+; PHOTOLUMINESCENCE; TRANSITION; CATIONS; GROWTH;

D O I：

10.1016/j.jallcom.2019.152352

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CasCdEu(PO4)(7) polycrystalline material with a beta-Ca-3(PO4)(2)-type (beta-TCP) structure was obtained using a solid state technique. The structure was refined by Rietveld method using powder synchrotron X-ray diffraction data. The analysis of applying approaches confirmed that the CasCdEu(PO4)(7) structure is similar to R (3) over barc structures of Ca8MEu(PO4)(7) (M = Mg, Zn). The photoluminescence properties were studied under UV excitation and compared with previously investigated Ca8MEu(PO4)(7)(M = Mg, Zn, Ca). The substitution of Ca2+ by M2+ influences on the efficiency of energy transfer between the host and the luminescent ion. The influence of second coordination-sphere interactions on the luminescent properties of Ca8MEu(PO4)(7) was revealed. Based on the difference on the PL spectra of Eu3+ in Ca8MEu(PO4)(7) with R3c or R (3) over barc structures the site-selective method for determination of space group in beta-TCP-type compounds was proposed. It is thus shown that the Eu3+ was used as an optical probe to determine the site symmetry of studied hosts. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：9

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