Improving the thermal stability and luminescence of Sr3Ga1.98In0.02Ge4O14:0.03Cr3+ through the efficient energy transfer

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2024-09-21 DOI:10.1016/j.jlumin.2024.120911

Haonan Huang, Jiayue Zhang, Bingkai Gao, Runqiu Peng, Zhijun Wang, Jiehong Li, Panlai Li

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Abstract

In this work, in order to explore the near-infrared (NIR) phosphor converted light emitting diodes (pc-LEDs), the NIR phosphor Sr₃Ga_1.98In_0.02Ge₄O₁₄:0.03Cr³⁺, 0.05 Yb³⁺ was achieved by the high temperature solid-state method, which presents a broadband emission with a large full width at half maximum (FWHM) of 291 nm due to the energy transfer from Cr³⁺ to Yb³⁺. The emission intensity (at 423 K) of Sr₃Ga_1.98In_0.02Ge₄O₁₄:0.03Cr³⁺, 0.05 Yb³⁺ can be maintained at 77 % of room temperature, which is 14 % higher than that before co-doping, indicating that this phosphor has better thermal stability. The NIR pc-LEDs can be fabricated by combining the phosphor Sr₃Ga_1.98In_0.02Ge₄O₁₄:0.03Cr³⁺, 0.05 Yb³⁺ with the blue LED, which can be applied in night vision. The results demonstrated its potential application value.

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通过高效能量转移提高 Sr3Ga1.98In0.02Ge4O14:0.03Cr3+ 的热稳定性和发光性能

在这项工作中，为了探索近红外荧光粉转换发光二极管（pc-LEDs），采用高温固态方法实现了近红外荧光粉 Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05 Yb3+，由于从 Cr3+ 到 Yb3+ 的能量转移，该荧光粉呈现出宽带发射，半最大全宽（FWHM）达到 291 nm。Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05Yb3+ 的发射强度（423 K 时）可保持在室温的 77%，比未共掺杂之前高出 14%，表明这种荧光粉具有更好的热稳定性。通过将 Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05 Yb3+ 荧光粉与蓝光 LED 结合，可以制造出近红外 pc-LED，应用于夜视领域。结果证明了其潜在的应用价值。

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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.