Synthesis, Structural, and Photoluminescence Studies of Tb3+ Activated Y2SiO5 Phosphor for Display Devices

IF 0.8 4区 化学 Q4 SPECTROSCOPY
Vikas Mishra, Sudhakar Singh, Vikas Dubey, Dhirendra Singh Kshatri, Pragati Patharia, Neha Dubey, M. C. Rao
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Abstract

The synthesis and luminescence analysis of Tb3+-activated phosphors were reported. Y2SiO5 phosphors were synthesized by a modified solid-state reaction method with a variable doping concentration of Tb3+ ion (0.5–2.5 mol.%). As synthesized, the phosphors were characterized by X-ray diffraction (XRD) analysis. The XRD pattern confirmed the monoclinic structure of the prepared phosphor. Scanning electron microscopy and High-Resolution Transmission Electron Microscopy (HRTEM) studies revealed nearly uniform particle size distribution in the prepared phosphors. The photoluminescence excitation spectra of the Y2SiO5:Tb3+ (0.5–2.5 mol.%) phosphor displayed one broad, intense peak at 258–277 nm. When excited at the 258 nm wavelength, the phosphors showed emission peaks at 553 nm (5D47F5), 544 nm (5D47F5) and 489 nm (5D47F6). The 1931 CIE (x,y) chromaticity coordinates showed the distribution of the spectral region calculated from the photoluminescence emission spectra. The values of x = 0.25 and y = 0.46 were very close to light green emission. Therefore, the prepared phosphor is very useful for light-emitting diode (green component) applications.

用于显示设备的 Tb3+ 活化 Y2SiO5 磷酸盐的合成、结构和光致发光研究
报告了 Tb3+ 活化荧光粉的合成和发光分析。Y2SiO5 荧光粉是通过改良固态反应法合成的,Tb3+离子的掺杂浓度可变(0.5-2.5 mol.%)。通过 X 射线衍射 (XRD) 分析对合成的荧光粉进行了表征。X 射线衍射图证实了所制备荧光粉的单斜结构。扫描电子显微镜和高分辨率透射电子显微镜(HRTEM)研究表明,所制备的荧光粉的粒度分布接近均匀。Y2SiO5:Tb3+ (0.5-2.5 mol.%)荧光粉的光致发光激发光谱在 258-277 纳米波长处显示出一个宽而强烈的峰值。在 258 纳米波长处激发时,荧光粉在 553 纳米(5D4 → 7F5)、544 纳米(5D4 → 7F5)和 489 纳米(5D4 → 7F6)处显示出发射峰。1931 年 CIE (x,y) 色度坐标显示了根据光致发光发射光谱计算出的光谱区域分布。x = 0.25 和 y = 0.46 的值非常接近浅绿色发射。因此,所制备的荧光粉非常适用于发光二极管(绿色成分)的应用。
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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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