Influence of Yb doping on optical and upconversion photoluminescence properties of Yb-, Er-co-doped Y2O3 transparent ceramics prepared by SPS
Influence of Yb doping on optical and upconversion photoluminescence properties of Yb-, Er-co-doped Y2O3 transparent ceramics prepared by SPS
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DOI：
10.1007/s10854-021-05346-2
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发表时间：
2021-02
期刊：
影响因子：
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通讯作者：
H. Kimura;Takumi Kato;Shin-ichi Yamamoto;D. Nakauchi;N. Kawaguchi;T. Yanagida
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文献类型：
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作者：
H. Kimura;Takumi Kato;Shin-ichi Yamamoto;D. Nakauchi;N. Kawaguchi;T. Yanagida
采用放电等离子烧结法制备了x%Yb-，0.5%Er共掺Y2O3透明陶瓷(x= 0，0.1，0.5，1.0，5.0和10)，研究了Yb掺杂对其光学和上转换发光性能的影响。在380 nm激发下，在550 nm和660 nm附近出现了尖锐的发射峰，量子产率约为2%。用单指数衰减函数拟合了550 nm附近的光致发光衰减曲线。Er~(3+)的4f → ~4f跃迁的衰变时间常数为0.03~0.11ms。在UC发光性能方面，在550 nm和660 nm附近观察到了尖锐的UC发射峰，其中掺Yb-5.0%，掺Er 0.5%的Y2O_3透明陶瓷样品的UC发射强度最高。随着x的增加，UC发射颜色的色度从绿色区域调整到红色区域。对于UC PL衰减曲线，上升时间随着x的增加而变慢。这一行为是Yb3+向Er3+转移能量的证据之一。
x% Yb-, 0.5% Er-co-doped Y2O3transparent ceramics (x= 0, 0.1, 0.5, 1.0, 5.0 and 10) were prepared by the spark plasma sintering, and then we evaluated the effect of Yb doping on optical and upconversion (UC) photoluminescence (PL) properties. Under an excitation at 380 nm, the sharp emission peaks appeared around 550 and 660 nm, and the quantum yield was approximately 2%. The PL decay curves monitoring around 550 nm were fitted by a single exponential decay function. The decay time constants were 0.03–0.11 ms, and the values were typical for the 4f → 4f transitions of Er3+. Regarding the UC PL properties, the sharp UC emission peaks around 550 and 660 nm were observed, and the UC emission intensity of 5.0% Yb-, 0.5% Er-co-doped Y2O3transparent ceramic sample was the highest among the prepared samples. With increasingx, the chromaticity of UC emission color was tuned from green to red region. Regarding the UC PL decay curves, the rise time became slower as increasingx. This behavior is one of the evidence of energy transfer from Yb3+to Er3+.