用于光器件应用的 Tb3+ 掺杂 Li2CaSiO4 磷酸盐的合成与发光研究

IF 0.8 4区 化学 Q4 SPECTROSCOPY Journal of Applied Spectroscopy Pub Date : 2024-07-06 DOI:10.1007/s10812-024-01765-1
M. P. D. Parimala, M. C. Rao, Ravindranadh Koutavarapu, Vikas Dubey
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引用次数: 0

摘要

采用高温固态反应法制备了一系列掺杂 Tb3+ 的 Li2CaSiO4 荧光粉。利用 X 射线衍射(XRD)技术对其结构进行了研究。X 射线衍射图显示,样品呈单相立方结构。扫描电子显微镜(SEM)用于获取制备样品的形态信息。扫描电子显微镜显微照片清楚地表明,颗粒以不均匀的形态结晶,粒径在 1 μm 到 100 nm 之间。此外,还对不同浓度的掺杂离子和不同激发的荧光粉样品进行了光致发光(PL)分析。472 nm(5D3 → 7F2,1,0)、487 nm(5D4 → 7F6)、550 nm(5D4 → 7F5)和 590 nm(5D4 → 7F4),分别归属于 Tb 离子的跃迁(在 237 nm 处激发)。1931 年 CIE(x,y)色度坐标显示了根据 PL 发射光谱计算出的光谱区域分布,并发现 Tb3+(0.01 重量(克))Li2CaSiO4 荧光粉的蓝绿色区域分布为(0.19,0.22)。我们的研究表明,制备的荧光粉可作为蓝绿色成分用于光学设备,主要是 LED。
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Synthesis and Luminescence Studies of Tb3+-Doped Li2CaSiO4 Phosphor for Optical Device Application

A series of Tb3+-doped Li2CaSiO4 phosphors were prepared by high-temperature solid-state reaction method. The structural studies were done using the X-ray diffraction (XRD) technique. The XRD patterns revealed that the sample was monophased and crystallizes in a cubic structure. Scanning electron microscopy (SEM) was used to obtain information about the morphology of the prepared samples. SEM micrographs clearly indicated that the particles crystallized in inhomogeneous morphology, with the particle size ranging from 1 μm to 100 nm. Also, photoluminescence (PL) analysis of the phosphor samples for different concentrations of doping ions with variable excitations were presented. The PL excitation spectrum of Tb3+ ion-doped Li2CaSiO4 has many sharp peaks, mainly at 418 nm (5D37F5), 436 nm (5D37F4), 456 nm (5D37F3), 472 nm (5D37F2,1,0), 487 nm (5D47F6), 550 nm (5D47F5), and 590 nm (5D47F4), assigned to the transitions of Tb- ion respectively (excited at 237 nm). The 1931 CIE (x, y) chromaticity coordinates showed the distribution of the spectral region calculated from PL emission spectra, and found to be (0.19, 0.22) in a bluish-green region of Tb3+ (0.01 wt (in grams)) Li2CaSiO4 phosphor. Our study shows that as-prepared phosphor may be useful for optical devices, mainly for LEDs, as a bluish-green component.

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来源期刊
CiteScore
1.30
自引率
14.30%
发文量
145
审稿时长
2.5 months
期刊介绍: Journal of Applied Spectroscopy reports on many key applications of spectroscopy in chemistry, physics, metallurgy, and biology. An increasing number of papers focus on the theory of lasers, as well as the tremendous potential for the practical applications of lasers in numerous fields and industries.
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