Intense red emission from trivalent Eu3+ doped Ca9La(VO4)7 nanophosphor for lighting and latent fingerprinting applications

IF 1.6 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Diksha Solanki, Poonam Devi, Hina Dalal, Neeraj Sehrawat, Mukesh Kumar, Ojas Garg, Rajesh Kumar Malik
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Abstract

A quick, efficient, and environment-friendly solution combustion approach was used to develop intense red light emitting Eu3+ activated Ca9La(VO4)7 nanophosphor. Rietveld’s refinement of patterns obtained from XRD validated the trigonal structure & (R3c 161 space group) of the crystallized nanophosphors. Elemental analysis and surface morphology of the red phosphors were investigated by EDAX and SEM techniques. Tauc’s theory was used to determine the band gap of the host & optimized nanosample. The excitation spectra at 331 nm indicate energy transfer between VO43− → Eu3+ ions, which is confirmed by photoluminescence lifetime measurements. The designated nanophosphors emit bright red light due to the 5D0 → 7F2 radiative transition. Dexter’s hypothesis and I–H model were used to demonstrate that dipole–dipole interactions are a true phenomenon for concentration quenching. Furthermore, the optical properties of Ca9La0.6Eu0.4(VO4)7 nanophosphor exhibit quantum efficacy (58.67%), CIE co-ordinates (0.5192, 0.3313), and color-temperature (1717 K), making it suitable for use in wLEDs, photonic devices and based on the previously mentioned results, the optimum (i.e. Ca9La(1-x)Eux(VO4)7 (x = 0.4 mol%)) nanophosphor was shown to be useful for LFP (latent fingerprinting).

Abstract Image

三价 Eu3+ 掺杂 Ca9La(VO4)7 纳米荧光粉发出的强红色光,用于照明和潜在指纹识别应用
利用快速、高效、环保的溶液燃烧方法,开发出了可发出强烈红光的 Eu3+ 活化 Ca9La(VO4)7 纳米磷。对 XRD 图谱的里特维尔德细化验证了结晶纳米磷酸盐的三叉结构& (R3c 161 空间群)。利用 EDAX 和 SEM 技术研究了红色荧光粉的元素分析和表面形态。利用陶氏理论确定了主样品和优化纳米样品的带隙。331 nm 处的激发光谱表明 VO43- → Eu3+ 离子之间存在能量转移,光致发光寿命测量也证实了这一点。指定的纳米磷因 5D0 → 7F2 辐射转变而发出明亮的红光。德克斯特假说和 I-H 模型证明了偶极-偶极相互作用是浓度淬灭的真实现象。此外,Ca9La0.6Eu0.4(VO4)7 纳米磷的光学特性表现出量子效率(58.67%)、CIE 坐标(0.5192, 0.3313) 和色温 (1717 K),使其适用于 wLED 和光子设备,并且基于前面提到的结果,最佳(即 Ca9La(1-x)Eux(VO4)7 (x = 0.4 mol%))纳米荧光粉被证明可用于 LFP(潜指纹)。
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来源期刊
Indian Journal of Physics
Indian Journal of Physics 物理-物理:综合
CiteScore
3.40
自引率
10.00%
发文量
275
审稿时长
3-8 weeks
期刊介绍: Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
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