越少越好:Ba2SiO4中Eu3+光还原的浓度依赖性

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2023-11-01 DOI:10.1016/j.jlumin.2023.120039

Zetian Yang , Jieqi Hu , David Van der Heggen , Mengmeng Jiao , Henk Vrielinck , Philippe F. Smet , Dirk Poelman

引用次数: 0

摘要

发光材料中的光致电子转移过程推动了许多应用，如医学成像、电离辐射剂量测定和安全标志。然而，在该过程中掺杂剂的光还原的浓度依赖性仍然不太清楚。这里，系统地进行了光谱和电子顺磁共振（EPR）实验，以揭示Ba2-xEuxSiO4中的掺杂浓度依赖性光还原行为，其中在用X射线照射时，一部分Eu3+掺杂剂可以还原为Eu2+。EPR测量表明Eu3的转化率+→在相同的辐照剂量下，Eu2+随着浓度的增加而减少，导致Ba2-xEuxSiO4中光还原行为的浓度依赖性。光谱测量表明，尽管引入的Eu3+离子占据至少三个结晶位点，但Eu3+只能在其中一个位点上被光还原。同时，该光还原位点的相对占有率随着掺杂浓度的增加而降低。这两个因素的结合可能是Eu3转化率降低的原因+→Eu2+。这些发现为发光材料中掺杂剂的光还原提供了见解，并有助于探索先进器件的这种功能行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Less is better: Insight into the concentration dependency of the photoreduction of Eu3+ in Ba2SiO4

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Less is better: Insight into the concentration dependency of the photoreduction of Eu3+ in Ba2SiO4

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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.