Orange-red emitting of Sm3+-doped Ba3Ga2Ge4O14 phosphor with high color rendering index and high color purity for LED applications

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-10 DOI:10.1016/j.jphotochem.2025.116777

Huan Dong , Lanxiu Xiao , Zhuo Tang , Jingyi Liu , Liya Jiang , Xu Wu , Linwen Jiang

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引用次数: 0

Abstract

This study prepared a series of orange-red Ba₃Ga₂Ge₄O₁₄ (BGG): xSm³⁺ (x = 1, 3, 5, 7, 9 %) phosphors via a high temperature solid-state method. The X-ray diffraction results confirmed the high phase purity of fabricated products. The diffuse reflection spectra showed that the optical band gap of this system was about 4.29 eV. Under an excitation wavelength of 401 nm, the strongest red-orange emission occurred at 599 nm (⁴G_5/2 → ⁶H_7/2). The optimal doping concentration of Sm³⁺ in BGG was determined to be 3 % with a color purity of 99.28 %. Thermal analysis revealed the exceptional thermal stability of BGG: 3 %Sm³⁺. The internal quantum efficiency of BGG: 3 %Sm³⁺ phosphor was measured to be 33.41 %. LEDs packaged with this phosphor had a color rendering index of 92.85, which was far higher than that of traditional LEDs. Using BGG: 3 %Sm³⁺ phosphor encapsulation for white LEDs confirmed its potential applications in white LEDs, providing new option for the development of LED applications.

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Sm3+掺杂Ba3Ga2Ge4O14荧光粉的橙红色发光，具有高显色指数和高色纯度，适用于LED应用

本研究采用高温固相法制备了一系列橙红色Ba3Ga2Ge4O14 (BGG): xSm3+ (x = 1,3,5,7,9 %)荧光粉。x射线衍射结果证实了制备的产品具有较高的相纯度。漫反射光谱表明，该体系的光学带隙约为4.29 eV。在401 nm激发波长下，在599 nm处（4G5/2→6H7/2）发生最强的红橙发射。BGG中Sm3+的最佳掺杂浓度为3%，色纯度为99.28%。热分析表明BGG: 3% Sm3+具有优异的热稳定性。测定了BGG: 3% Sm3+荧光粉的内量子效率为33.41%。采用该荧光粉封装的led显色指数为92.85，远高于传统led。采用BGG: 3% Sm3+荧光粉封装白光LED，证实了其在白光LED中的潜在应用，为LED应用的发展提供了新的选择。

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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.