Energy transfer mechanism in infrared-emitting NaYGeO4:Tm3+, Ho3+ phosphors

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-24 DOI:10.1016/j.ceramint.2024.09.300

Anna A. Melentsova, Olga A. Lipina, Alexander Yu. Chufarov, Alexander P. Tyutyunnik, Vladimir G. Zubkov

{"title":"Energy transfer mechanism in infrared-emitting NaYGeO4:Tm3+, Ho3+ phosphors","authors":"Anna A. Melentsova, Olga A. Lipina, Alexander Yu. Chufarov, Alexander P. Tyutyunnik, Vladimir G. Zubkov","doi":"10.1016/j.ceramint.2024.09.300","DOIUrl":null,"url":null,"abstract":"<div><div>Two series of NaY0.85Tm0.15-xHoxGeO4 (x = 0.005–0.03) and NaY0.85-xTm0.15HoxGeO4 (x = 0.0–0.055) phosphors have been prepared by the citrate technique. According to XRPD study, all the germanates crystallize in olivine structure and have an orthorhombic lattice, space group Pnma, Z = 4. The diffuse reflectance spectra have been measured and the optical band gap has been estimated. Under 808 nm laser diode excitation, the NaYGeO4:Tm3+, Ho3+ samples exhibit luminescence in the range of 1640–2240 nm, which is caused by 3F4 → 3H6 transition in Tm3+ and 5I7 → 5I8 transition in Ho3+ ions. The highest intensity of holmium lines, while maintaining relatively high intensity of thulium lines, was observed for NaY0.82Tm0.15Ho0.03GeO4, NaY0.815Tm0.15Ho0.035GeO4 samples with the Tm3+/Ho3+ ratio close to 5/1. The luminescence decay kinetics has been studied and the rate of energy transfer from Tm3+ to Ho3+ ions has been calculated. The obtained results indicate an effective energy transfer accelerated by migration due to dipole-dipole interaction. The mechanism of excitation and infrared luminescence in NaYGeO4:Tm3+, Ho3+ phosphors has been proposed.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49545-49551"},"PeriodicalIF":5.1000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224043347","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Two series of NaY_0.85Tm_0.15-xHo_xGeO₄ (x = 0.005–0.03) and NaY_0.85-xTm_0.15Ho_xGeO₄ (x = 0.0–0.055) phosphors have been prepared by the citrate technique. According to XRPD study, all the germanates crystallize in olivine structure and have an orthorhombic lattice, space group Pnma, Z = 4. The diffuse reflectance spectra have been measured and the optical band gap has been estimated. Under 808 nm laser diode excitation, the NaYGeO₄:Tm³⁺, Ho³⁺ samples exhibit luminescence in the range of 1640–2240 nm, which is caused by ³F₄ → ³H₆ transition in Tm³⁺ and ⁵I₇ → ⁵I₈ transition in Ho³⁺ ions. The highest intensity of holmium lines, while maintaining relatively high intensity of thulium lines, was observed for NaY_0.82Tm_0.15Ho_0.03GeO₄, NaY_0.815Tm_0.15Ho_0.035GeO₄ samples with the Tm³⁺/Ho³⁺ ratio close to 5/1. The luminescence decay kinetics has been studied and the rate of energy transfer from Tm³⁺ to Ho³⁺ ions has been calculated. The obtained results indicate an effective energy transfer accelerated by migration due to dipole-dipole interaction. The mechanism of excitation and infrared luminescence in NaYGeO₄:Tm³⁺, Ho³⁺ phosphors has been proposed.

查看原文本刊更多论文

红外发光 NaYGeO4:Tm3+, Ho3+ 荧光粉中的能量传递机制

通过柠檬酸盐技术制备了两个系列的 NaY0.85Tm0.15-xHoxGeO4 (x = 0.005-0.03) 和 NaY0.85-xTm0.15HoxGeO4 (x = 0.0-0.055) 荧光粉。根据 XRPD 研究，所有的锗酸盐都以橄榄石结构结晶，具有正方晶格，空间群为 Pnma，Z = 4。测量了漫反射光谱并估算了光带隙。在 808 nm 激光二极管激发下，NaYGeO4:Tm3+, Ho3+ 样品在 1640-2240 nm 范围内发光，这是由于 Tm3+ 中的 3F4 → 3H6 转变和 Ho3+ 离子中的 5I7 → 5I8 转变引起的。在 Tm3+/Ho3+ 比率接近 5/1 的 NaY0.82Tm0.15Ho0.03GeO4、NaY0.815Tm0.15Ho0.035GeO4 样品中，钬线强度最高，而铥线强度相对较高。研究了发光衰减动力学，并计算了从 Tm3+ 到 Ho3+ 离子的能量转移率。结果表明，由于偶极-偶极相互作用，迁移加速了有效的能量转移。提出了 NaYGeO4:Tm3+, Ho3+ 磷光体的激发和红外发光机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.