Site occupancy, luminescence and dielectric properties of β-Ca3(PO4)2-type Ca8ZnLn(PO4)7 host materials

被引：13

作者：

Dikhtyar, Yu Yu ^{[1
]}

Spassky, D. A. ^{[2
,3
]}

Morozov, V. A. ^{[1
]}

Deyneko, D., V ^{[1
,4
]}

Belik, A. A. ^{[5
]}

Baryshnikova, O., V ^{[1
]}

Nikiforov, I., V ^{[1
]}

Lazoryak, B., 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] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia

[4] Russian Acad Sci, Kola Sci Ctr, Lab Arctic Mineral & Mat Sci, 14 Fersman Str, Apatity 184209, Russia

[5] Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton WPI MANA, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 908卷

基金：

俄罗斯科学基金会;

关键词：

Phosphate; Dielectric properties; Antiferroelectric properties; Luminescence properties; Crystal structure; Synchrotron radiation; 4f levels; Bandgap of beta-Ca-3(PO4)(2); WHITE-LIGHT EMISSION; CRYSTAL-STRUCTURE; OPTICAL-PROPERTIES; EMITTING PHOSPHOR; ENERGY-TRANSFER; WHITLOCKITE; LN; PHOTOLUMINESCENCE; ORTHOPHOSPHATES; THERMOMETRY;

D O I：

10.1016/j.jallcom.2022.164521

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：

Phosphates of Ca(8)ZnLn(PO4)(7) (Ln(3+) = La - Nd, Sm - Lu) with beta-Ca-3(PO4)(2)-type structure were prepared by high-temperature solid-state technique on air. All compounds of Ca(8)ZnLn(PO4)(7) are centrosymmetric and have R3 over line c space group, which has been proved by several methods such as second-harmonic generation, dielectric spectroscopy, and Rietveld analysis. The influence of Ln(3+) on the structure, luminescent properties and temperature of phase transitions, which corresponds with "tetrad " effect, has been investigated. The bandgap width and location of 4f Ln(3+) and Ln(2+) levels relatively to the energy bands were determined using the data of luminescent spectroscopy. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：10

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