| Yb3+共掺杂对Zn2GeO4∶Mn2+绿色长余辉发光性能增强研究 |
| Enhanced Green-Light-Emitting Afterglow in Zn2GeO4∶Mn2+ Phosphor by Yb3+ Codoping |
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| 摘要: 利用高温固相法合成了Zn2GeO4∶Mn2+以及Zn2GeO4∶Mn2+，Yb3+绿色发射长余辉发光材料，对样品进行了X射线衍射分析、荧光光谱分析、色坐标、热释发光以及发光寿命测量。分析结果表明，在1 050 ℃下烧结3 h的Zn2GeO4为单相产物，所得Zn2GeO4∶Mn2+发光材料具有良好的发光性能，在紫外灯激发下发出最强发射位于528 nm的宽带发射并具有优良的长余辉发光特性，其色坐标值分别为x=0.145，y=0.773。Yb3+共掺杂对其长余辉发光性能提高明显。余辉发光在暗场环境下肉眼可观察的持续时间超过2 h。通过热释光谱对陷阱进行了分析。对Yb3+共掺杂的长余辉发光增强机理进行了讨论。 |
| 关键词: 余辉发光 热释光谱 锗酸锌 锰离子 绿光 |
| 基金项目: |
| Abstract: The Zn2GeO4∶Mn2+ and Zn2GeO4∶Mn2+, Yb3+ which emit green color long-lasting phosphorescence upon UV light excitation are prepared by the conventional high-temperature solid-state method, and their luminescent properties are systematically investigated in this paper. XRD, photoluminescence, thermoluminescence spectra and afterglow decay curve are used to characterize the synthesized phosphor. This phosphor is well-crystallized by calcination at 1 050 ℃ for 3 h and possesses excellent performance. After irradiation by UV light, this phosphor emits a broad band centered at 528 nm with CIE chromaticity coordinates x=0.145, y=0.773, and shows obvious long-lasting phosphorescence. The afterglow can be observed for more than 2 h after tunning off the activating lamp in the light perception of the dark-adapted human eye. The mechanism of the enhanced afterglow by Yb3+ codoping was discussed. |
| Keywords: afterglow thermoluminescence Zn2GeO4 manganese ion green-light emitting |
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| 孙中新.Yb3+共掺杂对Zn2GeO4∶Mn2+绿色长余辉发光性能增强研究[J].无机化学学报,2012,28(6):1229-1233. |
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