Structural and luminescence properties of SrGd2O4 nanocrystalline phosphor doped with Dy3+ and Sm3+

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2203295s

Tijana Stamenković, Nadežda Radmilović, M. Nikolic, Jelena Erčić, V. Lojpur

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引用次数: 2

Abstract

In this manuscript, down-conversion nanopowders of SrGd2O4 doped with different concentrations of either Dy3+ or Sm3+ ions were examined in detail. All samples were prepared via glycine-assisted combustion method, primarily burned at 500?C for 1.5 h and additionally calcined at 1000?C for 2 h, at ambient room temperature. The XRD analysis showed that all samples crystallize as single phase and the orthorhombic lattice SrGd2O4. TEM analysis determined high degree of crystallinity of samples with grain size of approximately 200 nm for Dy3+ doped and 150 nm for Sm3+ doped SrGd2O4. For both samples SAED confirmed that diffraction rings correspond to the hkl plane indices of SrGd2O4, while EDS confirmed presence of Dy in crystal structure. Results of luminescent characterization demonstrated all appropriate emission peaks related to either Dy3+ or Sm3+ dopant ions. Investigation of dopant concentration revealed that the lowest values of both dopants have the most prominent emission peaks, while coordinates obtained from the CIE diagram showed emission shifting with the change of concentration.

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掺杂Dy3+和Sm3+的SrGd2O4纳米晶荧光粉的结构和发光性能

本文详细研究了掺杂不同浓度Dy3+或Sm3+离子的SrGd2O4下转换纳米粉体。所有样品均通过甘氨酸辅助燃烧法制备，主要在500℃下燃烧。温度1.5小时，另外在1000℃下煅烧。在室温下加热2小时。XRD分析表明，所有样品均为单相和正交晶格的SrGd2O4。TEM分析表明，样品的结晶度较高，Dy3+掺杂的样品晶粒尺寸约为200 nm, Sm3+掺杂的样品晶粒尺寸约为150 nm。对于两种样品，SAED证实了衍射环对应于SrGd2O4的hkl平面指数，EDS证实了晶体结构中存在Dy。发光表征结果表明，所有合适的发射峰都与Dy3+或Sm3+掺杂离子有关。对掺杂剂浓度的研究表明，两种掺杂剂的最低值都有最突出的发射峰，而CIE图的坐标则随浓度的变化而发生发射位移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.