Down conversion and efficient NIR to visible up-conversion emission analysis in Ho3+/Yb3+ co-doped tellurite glasses

IF 2.7 4区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Boletin de la Sociedad Espanola de Ceramica y Vidrio Pub Date : 2023-07-01 DOI:10.1016/j.bsecv.2023.01.002

Sharafudeen Kaniyarakkal , Kesavulu Culala Rajasekharaudayar , Rajesh Dagupati , Yang Li , Zhi Chen , Vijayakumar Sadasivan Nair , Shiju Edappadikkunnummal

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引用次数: 2

Abstract

A series of glasses with chemical composition (50−x−y) TeO₂–30ZnO–10YF₃–10NaF–xHo₂O₃–yYb₂O₃ (x = 0.5 and y = 0.5, 1.0, 3.0, 5.0 mol%) were prepared by melt-quenching procedure. The absorption spectra, excitation, down conversion emission spectra, up-conversion (UC) emission spectra and decay time measurements were analyzed. In down conversion, the visible emission transition intensity associated with ⁵F₄ → ⁵I₈ (547 nm), ⁵F₅ → ⁵I₈ (657 nm), and ⁵F₄ → ⁵I₇ (755 nm) of Ho³⁺ ions decreased with Yb³⁺ concentration due to the energy transfer (ET) process from Ho³⁺ to Yb³⁺ ions. In up-conversion, on exciting with 980 nm diode laser beam, we observed a strong green (543 nm) and red (657 nm) UC emissions, that refers to the energy level transitions; ⁵F₄ (⁵S₂) → ⁵I₈ and ⁵F₅ → ⁵I₈ of Ho³⁺. The influence of excitation power on UC intensities studies revealed that the population at ⁵F₄ (⁵S₂) and ⁵F₅ levels of Ho³⁺ ion occurs due to two-photon absorption process associated energy transfer from Yb³⁺ to Ho³⁺. The influence of Yb³⁺ doped concentration on UC was studied, and it is observed that both the green and red UC intensities improved significantly on increasing Yb³⁺ ions concentration.

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Ho3+/Yb3+共掺碲酸盐玻璃的下转换和高效近红外到可见上转换发射分析

采用熔体淬火法制备了化学成分为(50−x−y) TeO2-30ZnO-10YF3-10NaF-xHo2O3-yYb2O3 (x = 0.5, y = 0.5, 1.0, 3.0, 5.0 mol%)的玻璃。分析了吸收光谱、激发光谱、下转换发射光谱、上转换发射光谱和衰减时间的测量结果。下转换过程中，Ho3+离子的5F4→5I8 (547 nm)、5F5→5I8 (657nm)和5F4→5I7 (755 nm)的可见发射跃迁强度随Yb3+浓度的增加而减小，这是由于Ho3+离子向Yb3+离子的能量转移(ET)过程所致。在上转换中，在980 nm二极管激光束激发下，我们观察到强烈的绿色(543 nm)和红色(6557 nm) UC发射，这是指能级跃迁;Ho3+的5F4 (5S2)→5I8和5F5→5I8激发功率对UC强度的影响研究表明，在5F4 (5S2)和5F5能级上Ho3+离子的居群是由于双光子吸收过程中与能量从Yb3+转移到Ho3+有关。研究了Yb3+掺杂浓度对UC的影响，发现随着Yb3+掺杂浓度的增加，绿色和红色UC的强度都有显著提高。

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来源期刊

Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学：硅酸盐

CiteScore

5.50

自引率

2.90%

发文量

审稿时长

103 days

期刊介绍： The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.