Preparation and luminescence characteristics of monazite Eu3+:LaPO4 nanocrystals in NH4NO3 molten salt

被引：23

作者：

Huang, Xinyang ^{[1
]}

机构：

[1] Jiangxi Univ Finance & Econ, Inst Res Funct Mat, Nanchang 330013, Jiangxi, Peoples R China

来源：

OPTICAL MATERIALS | 2015年 / 50卷

基金：

中国国家自然科学基金;

关键词：

Eu3+:LaPO4; Molten salt method; NH4NO3; flux; Luminescnce; ENERGY-TRANSFER; LANTHANIDE ORTHOPHOSPHATES; LAPO4-EU; NANOPARTICLES; PHOSPHATES; PARTICLES; POWDERS; SURFACE; GROWTH; LA;

D O I：

10.1016/j.optmat.2015.09.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molten-salt method and NH4NO3 flux were developed to fabricate monoclinic monazite Eu3+:LaPO4 nanocrystals for the first time. The products were characterized by X-ray powder diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, excitation spectra, emission spectra and luminescence decay curves. The as-obtained products were quasihexagonal Eu3+:LaPO4 nanocrystals with the mean size of 30 nm. The room temperature charge transfer bands (CTB) exhibited red-shift and spectral broadening in comparison with 10 K CTB. The optimal Eu3+ concentration was determined to be 8 mol% by a comparative study of the relative emission intensities for different Eu3+ doping concentrations. The higher concentration quenching could be caused by the possible nonradiative energy transfer (electric multipole-multipole interaction). The relationship between the FL lifetime of D-5(0) energy level and Eu3+ concentration was investigated based on Auzel's model. This work is important not only to understand the unique physical properties of Eu3+:LaPO4 nanocrystals but also to bring an opportunity for the development of the other nanocrystals via the molten salt synthesis in NH4NO3 flux. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：81 / 86

页数：6

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