Energy transfer phenomena in Er3+, Yb3+, Tm3+ tri-doped lanthanum oxysulfide phosphors

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-03-15 DOI:10.1016/j.jlumin.2025.121195

Alexandre Le Coz, Louis Cornet, Guillaume Durand, Romane Henry-Bauer, Manon Even, Marine Poitou, François Cheviré, Yan Suffren, Odile Merdrignac-Conanec

引用次数: 0

Abstract

Lanthanum oxysulfide (La₂O₂S) was investigated as an effective doping matrix for the development of Er³⁺, Yb³⁺, Tm³⁺ tri-doped phosphors emitting white light. The powders were prepared by combustion synthesis and subsequently post-sulfurized under H₂S/N₂. They were characterized using Powder X-Ray Diffraction, Fourier-Transform Infrared Spectroscopy, Scanning Electron Microscopy and thermogravimetric analysis to assess their purity, morphology and thermal stability. The excitation, down-conversion and up-conversion properties of the phosphors were then studied using UV/Visible/NIR and fluorescence spectroscopy. Although white emission was not achieved with the studied compositions, a mechanism for up-conversion energy transfer in the tri-doped samples is proposed.

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Er3+, Yb3+， Tm3+三掺杂氧化硫化镧荧光粉中的能量转移现象

研究了氧化硫化镧（La2O2S）作为制备Er3+， Yb3+， Tm3+三掺杂荧光粉的有效掺杂基质。采用燃烧合成法制备粉末，并在H2S/N2下进行后硫化。采用粉末x射线衍射、傅里叶变换红外光谱、扫描电镜和热重分析对其进行了表征，以评估其纯度、形貌和热稳定性。然后利用紫外/可见光/近红外光谱和荧光光谱研究了荧光粉的激发、下转换和上转换特性。虽然所研究的成分没有实现白色发射，但提出了三掺杂样品中上转换能量传递的机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.