Dy3+/Cr4+掺杂的CaLuGaO4荧光粉发出白光和宽近红外光

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-05-11 DOI:10.1016/j.jphotochem.2025.116494

Wenfeng Yuan, Xianke Sun, Meng Wu

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引用次数: 0

摘要

一种既能发出白光又能发出宽近红外（NIR）光的荧光粉在各个领域都很有意义，因为它既能实现视觉检测，也能实现近红外光谱检测。在这项研究中，我们设计了Dy3+/Cr4+共掺杂的CaLuGaO4荧光粉，当在450 nm激发时，可以发出1100 nm到1700 nm范围内的白光和宽近红外光。白光是由Dy3+的4F9/2→6H15/2、6H13/2、6H11/2跃迁产生的。宽的近红外光来自于Cr4+的3T2到3A2跃迁。此外，Dy3+/Cr4+共掺杂的CaLuGaO4荧光粉发生了从Dy3+到Cr4+的能量转移，通过改变Dy3+和Cr4+的浓度，可以调节白光和近红外光的比例。通过将合成的荧光粉封装在商用蓝色LED芯片上，构建了一个磷转换发光二极管，展示了在照明光源和非破坏性光谱分析方面的潜在应用。

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Dy3+/Cr4+ doped CaLuGaO4 phosphors emitting white and broad NIR light

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Dy3+/Cr4+ doped CaLuGaO4 phosphors emitting white and broad NIR light

A phosphor that emits both white light and broad near-infrared (NIR) light is of significant interest across various fields, as it enables both visual inspection and NIR spectroscopic detection. In this study, we designed Dy³⁺/Cr⁴⁺ codoped CaLuGaO₄ phosphors that emit both white light and broad NIR light ranging from 1100 nm to 1700 nm when excited at 450 nm. The white light is produced by the ⁴F_9/2 → ⁶H_15/2, ⁶H_13/2, ⁶H_11/2 transitions of Dy³⁺. The broad NIR light arises from the ³T₂ to ³A₂ transition of Cr⁴⁺. Additionally, energy transfer from Dy³⁺ to Cr⁴⁺ occurs in the Dy³⁺/Cr⁴⁺ codoped CaLuGaO₄ phosphors, allowing for tunable ratios of white light to NIR light by varying the concentrations of Dy³⁺ and Cr⁴⁺. A phosphor-converted light-emitting-diode was constructed by encapsulating the synthesized phosphors around a commercial blue LED chip, demonstrating potential applications in lighting sources and non-destructive spectral analysis.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.