Synthesis and Luminescence Characterization of Novel Red-Emitting Phosphors Based on Eu3+-Activated K2Sr(MoO4)2 Molybdates for w-LEDs.

IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS
Huapeng Sun, Meili Yang, Anlin Zhang, Yanhua Lei, Bin Deng
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引用次数: 0

Abstract

In this work, trivalent europium (Eu3+) ion activated K2Sr(MoO4)2 red phosphors have been synthesized through high-temperature solid-state reaction method at 750 ℃. Detailed analysis was conducted on the phase purity, morphology, and luminescence properties of the synthesized phosphors. X-ray diffraction (XRD) confirmed the successful formation of K2Sr(MoO4)2:Eu3+ phosphors with pure phase with space group С2/c. The photoluminescence (PL) spectroscopy was used to record the excitation and emission spectrum of Eu3+ activated K2Sr(MoO4)2 phosphor. Under the excitation of 280 nm, the resultant samples exhibited the characteristic emissions of Eu3+ ions corresponding to the 5D07FJ transitions. The optimal doping concentration of Eu3+ ions was determined to be 35 mol%. Concentration quenching mechanism was identified as the interaction of near-neighbor ions. The chromaticity coordinates of K2Sr(MoO4)2:35 mol%Eu3+ were (0.659, 0.340) with a corresponding high color purity of 99.8%. The prepared K2Sr(MoO4)2:35 mol%Eu3+ phosphor had good thermal stability with temperature quenching temperature (T0.5 > 420 K) and high activation energy (Ea = 0.267 eV). The exhaustive findings from this study form the basis for advocating the application of these phosphors in light-emitting devices.

基于Eu3+活化K2Sr(MoO4)2钼酸盐的新型w- led发红光荧光粉的合成与发光特性
本文采用高温固相法在750℃下合成了三价铕(Eu3+)离子活化的K2Sr(MoO4)2红色荧光粉。对合成的荧光粉的相纯度、形貌和发光性能进行了详细的分析。x射线衍射(XRD)证实了K2Sr(MoO4)2:Eu3+荧光体的成功形成,其纯相空间基团为С2/c。利用光致发光(PL)光谱法记录了Eu3+活化的K2Sr(MoO4)2荧光粉的激发和发射光谱。在280 nm的激发下,所得样品呈现出5D0→7FJ跃迁的Eu3+离子特征发射。确定了Eu3+离子的最佳掺杂浓度为35 mol%。浓度猝灭机制确定为邻近离子的相互作用。K2Sr(MoO4)2:35 mol%Eu3+的色度坐标为(0.659,0.340),色纯度为99.8%。制备的K2Sr(MoO4)2:35 mol%Eu3+荧光粉具有良好的热稳定性,其温度淬火温度为T0.5 > 420 K,活化能较高(Ea = 0.267 eV)。这项研究的详尽结果构成了倡导在发光器件中应用这些荧光粉的基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Fluorescence
Journal of Fluorescence 化学-分析化学
CiteScore
4.60
自引率
7.40%
发文量
203
审稿时长
5.4 months
期刊介绍: Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.
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