掺杂 Nd、Yb、Er 和 Ho 四种元素的 Y2O3 荧光中的增强型上转换发射

Q3 Physics and Astronomy
Harsha S. Deshmukh, Gajanan G. Muley
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引用次数: 0

摘要

采用燃烧法制备了掺杂 Yb3+、Nd3+、Er3+ 和 Ho3+ 四离子的 Y2O3 上转换荧光粉。粉末 X 射线衍射研究证实了所制备样品的晶相纯度和立方相。通过漫反射光谱法测量了样品在 200-1100 纳米光谱范围内的吸收率。所有样品都显示出较大的带隙。扫描电子显微镜分析显示,颗粒呈球形,大小约为 200 纳米。在 980 纳米二极管激光器和 166 mW 激光功率的激发下,对上转换发射进行了研究。Ho3+、Nd3+ 和 Yb3+共掺杂的 Y2O3 荧光粉显示出非常高的发射强度,以 550 nm 左右为中心的绿光带和以 667 nm 为中心的中等强度的红光带,而 Er3+、Nd3+ 和 Yb3+ 共掺杂的 Y2O3 荧光粉则相反。Er3+、Ho3+、Nd3+ 和 Yb3+共掺杂的 Y2O3 荧光粉在绿色和红色波段都显示出更强的高发射强度。在 Nd3+ 和 Yb3+ 共掺杂的 Y2O3 荧光粉中,这两个波段不可见,但在 549、568 和 799 纳米波段显示出微弱的上转换发射。由于绿色波段的发射强度较高,Ho3+、Nd3+ 和 Yb3+共掺杂 Y2O3 荧光粉可能会在医疗和安防领域得到潜在应用,而 Er3+、Ho3+、Nd3+ 和 Yb3+共掺杂荧光粉在绿色和红色波段的上转换能力增强,可能会在白光发电领域得到应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced upconversion emission in Nd, Yb, Er and Ho tetra-doped Y2O3 phosphor

Yb3+, Nd3+, Er3+ and Ho3+ tetra ions doped Y2O3 upconversion phosphors have been prepared by the combustion route. Crystalline phase purity and cubic phase of prepared samples have been confirmed from powder X-ray diffraction study. Absorbance of samples over spectral range 200–1100 nm has been measured by diffuse reflectance spectroscopy. All samples exhibit large band gaps. Scanning electron micrograph analysis reveals spherical morphology of particles and sizes around 200 nm. Upconversion emission has been studied under a 980 nm diode laser excitation with 166 mW laser power. The Ho3+, Nd3+ and Yb3+ co-doped Y2O3 phosphor show very high emission intensity of a green band centred at around 550 nm and another moderate intensity red band centred on 667 nm, while reverse is the case for Er3+, Nd3+ and Yb3+ co-doped Y2O3 phosphor. Er3+, Ho3+, Nd3+ and Yb3+ co-doped Y2O3 phosphor show enhanced high emission intensity in both green and red bands. These two bands are not visible in Nd3+ and Yb3+ co-doped Y2O3 phosphor but show weak upconversion emission at 549, 568 and 799 nm. Owing to the high emission intensity of green band, Ho3+, Nd3+ and Yb3+ co-doped Y2O3 phosphor may find potential applications in medical and security, while Er3+, Ho3+, Nd3+ and Yb3+ co-doped phosphor showing enhanced upconversion in green and red bands may find applications in white light generation.

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来源期刊
Results in Optics
Results in Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
2.50
自引率
0.00%
发文量
115
审稿时长
71 days
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