新型近红外超长余辉材料Zn3Al2Ge2O10：Cr3+的发光性能

杨小平; 崔瑞瑞; 张弛; 邓朝勇

doi:10.3788/fgxb20143503.0300

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新型近红外超长余辉材料Zn₃Al₂Ge₂O₁₀：Cr³⁺的发光性能

材料合成及性能 | 更新时间：2020-08-12

- 新型近红外超长余辉材料Zn₃Al₂Ge₂O₁₀：Cr³⁺的发光性能
- Luminescent Properties of A Novel Near-infrared Super-long Afterglow Material Zn₃Al₂Ge₂O₁₀：Cr³⁺
- 发光学报 2014年35卷第3期页码：300-305
- 作者机构：
  
  贵州大学电子信息学院贵州省电子功能复合材料特色重点实验室, 贵州贵阳 550025
- 作者简介：
- 基金信息：
  
  贵州省科技计划（2012-3005，2010-4005，2009-15，2010-2134，2011-2016）();贵阳市科技计划（2012101-2-4）资助项目()
- DOI：10.3788/fgxb20143503.0300
  中图分类号： O482.31
- 收稿日期：2013-10-04，
  
  修回日期：2013-12-07，
  
  纸质出版日期：2014-03-03
- 稿件说明：
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杨小平, 崔瑞瑞, 张弛等. 新型近红外超长余辉材料Zn3Al2Ge2O10：Cr3+的发光性能[J]. 发光学报, 2014,35(3): 300-305

YANG Xiao-ping, CUI Rui-rui, ZHANG Chi etc. Luminescent Properties of A Novel Near-infrared Super-long Afterglow Material Zn3Al2Ge2O10：Cr3+[J]. Chinese Journal of Luminescence, 2014,35(3): 300-305
杨小平, 崔瑞瑞, 张弛等. 新型近红外超长余辉材料Zn3Al2Ge2O10：Cr3+的发光性能[J]. 发光学报, 2014,35(3): 300-305 DOI： 10.3788/fgxb20143503.0300.

YANG Xiao-ping, CUI Rui-rui, ZHANG Chi etc. Luminescent Properties of A Novel Near-infrared Super-long Afterglow Material Zn3Al2Ge2O10：Cr3+[J]. Chinese Journal of Luminescence, 2014,35(3): 300-305 DOI： 10.3788/fgxb20143503.0300.

摘要

采用高温固相法制备了新型近红外长余辉材料Zn

：Cr

，利用X射线衍射、荧光光谱和余辉衰减曲线等对合成的样品进行了分析。结果表明：样品Zn

：Cr

是Ge

取代ZnAl

：Cr

尖晶石中的部分Al

而形成的固溶体。在397 nm光的激发下，发射光谱主要由两个明显的窄峰叠加在Cr

离子的自旋允许跃迁

辐射的宽发射带上。发光强度随着Cr

离子掺杂浓度的增大和煅烧温度的升高而出现浓度猝灭及温度猝灭现象。当Zn

：

中的Cr

离子掺杂量

为2%且煅烧温度为1 350 ℃时，样品的近红外发光及余辉强度最大。材料的余辉持续时间超过300 h，余辉发射谱峰位与荧光发射光谱中的N线一致，均位于697 nm附近。最后分析了煅烧温度对样品余辉性能的影响，并对材料的余辉机制进行了探讨。

Abstract

A novel near-infrared afterglow material Zn

:Cr

was synthesized by high-temperature solid-phase method

and analyzed by means of XRD

photoluminescence spectra

curve of afterglow decay

etc.

The results indicate that the Zn

:Cr

is in fact ZnAl

:Cr

spinel compound in which Al

is partly replaced by Ge

. Under 397 nm excitation

the emission spectra at room temperature mainly consist of two obvious narrow peaks superposition on a broadband which belongs to the spin-allowed

emission of Cr

. The concentration quenching and temperature quenching could be observed as the Cr

doping concentration and sintering temperature increasing. The optimized LLP performance and the strongest luminescence intensity could be obtained when the doping content of Cr

(

) in Zn

2－

is 2% and the sintering temperature is 1 350 ℃. The persistence time of the material lasts more than 300 h. The strongest peaks of both emission spectrum and afterglow spectrum are at around 697 nm. The effect of sintering temperature on the LLP performance is analyzed and the mechanism of super long afterglow is researched.

关键词

Keywords

references

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