Luminescence Study and Energy Transfer from Ce3+ to Yb3+ in Sr5(BO3)3Cl Phosphor

IF 0.8 4区 化学 Q4 SPECTROSCOPY
R. A. Talewar
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引用次数: 0

Abstract

A new phosphor Sr5(BO3)3Cl:Ce3+,Yb3+, which enables near-infrared (NIR) quantum cutting, was prepared using traditional solid-state reaction methods. Its properties were examined using X-ray diffraction, photoluminescence emission, excitation spectra, and measurements of fluorescence decay. Upon excitation of Ce3+ with an ultraviolent (UV) photon at 350 nm, broadband emission at 415 nm and an intense NIR emission at 982 nm were observed. Emission at 415 nm corresponds to 5d→4f transition of Ce3+ ions, whereas the NIR emission at 982 nm is ascribed to the characteristic 2F5/22F7/2 transition of Yb3+ ions. Thorough investigation delved into how the concentration of Ce3+ affects visible and NIR emissions, decay lifetime, and energy transfer efficiency (ηETE). Detailed analysis of photoluminescence excitation, emission spectra, and fluorescence decay measurements revealed a proficient energy transfer from Ce3+ to Yb3+ ions. This transfer was demonstrated as a cooperative energy transfer (CET) process, showcasing a CET efficiency of 71.2% and a total theoretical quantum efficiency of 171.2%.

Sr5(BO3)3Cl 磷酸盐中的发光研究和从 Ce3+ 到 Yb3+ 的能量转移
采用传统的固态反应方法制备了一种可实现近红外量子切割的新型荧光粉 Sr5(BO3)3Cl:Ce3+,Yb3+。研究人员利用 X 射线衍射、光致发光发射、激发光谱和荧光衰减测量方法考察了它的特性。用 350 纳米的紫外线(UV)光子激发 Ce3+ 时,可观察到 415 纳米的宽带发射和 982 纳米的强烈近红外发射。415 纳米波段的发射对应于 Ce3+ 离子的 5d→4f 转变,而 982 纳米波段的近红外发射则归因于 Yb3+ 离子特有的 2F5/2 → 2F7/2 转变。深入研究了 Ce3+ 的浓度如何影响可见光和近红外发射、衰变寿命和能量传递效率(ηETE)。对光致发光激发、发射光谱和荧光衰减测量结果的详细分析表明,Ce3+ 离子与 Yb3+ 离子之间存在着熟练的能量转移。这种能量转移被证明是一种协同能量转移(CET)过程,CET 效率为 71.2%,总理论量子效率为 171.2%。
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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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