基于激发能约束的Yb2Mo4O15:Er3+近红外LED的绿色和近红外辐射增强

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-04 DOI:10.1016/j.jlumin.2025.121233

Haibin Zhang , Jiarui Zhao , Ying Ji, Tao Pang

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引用次数: 0

摘要

对于上转换发光（UCL），高浓度的Yb3+离子增强了激发能的吸收，但由于离子之间的能量迁移，往往会导致明显的发光猝灭。在这项研究中，我们选择了以其卓越的UCL效率而著名的Yb2Mo4O15:Er3+，来研究激发能对提高UCL和近红外（NIR）发射的限制。我们的研究结果表明，10 mol%的惰性Lu3+的掺入将更多的激发能限制在亚晶格水平，导致绿色UCL增加4.56倍，近红外发光增强35%。通过一个简单的物理模型来理解光致加热与泵功率之间的关系，并指导温度传感的标定。最后，我们建议设计一个具有实时温度监测芯片的近红外LED用于夜视照明。

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Enhanced green and NIR emissions in Yb2Mo4O15:Er3+ via excitation energy confinement for a novel NIR LED with real-time chip temperature monitoring

For upconversion luminescence (UCL), high concentration of Yb³⁺ ions enhance excitation energy absorption but often suffer from significant luminescence quenching due to energy migration among the ions. In this study, we choose Yb₂Mo₄O₁₅:Er³⁺, known for its exceptional UCL efficiency, to investigate the confinement of excitation energy for improved UCL and near-infrared (NIR) emission. Our findings reveal that the incorporation of 10 mol% inert Lu³⁺ confines more excitation energy at sublattice level, resulting in an 4.56-fold increase in green UCL and a 35 % enhancement in NIR luminescence. A simple physical model is employed to understand the relationship between light-induced heating and pump power, and to guide the calibration of temperature sensing. Finally, we propose to design an NIR LED with real-time chip temperature monitoring for night vision lighting.

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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.