Dynamic Process of Green Upconversion Emission from Ho3+ Under Square Wave Excitation

YANG Yan-min; MI Chao; LIU Lin-lin; ZHANG Jiao; YU Fang; LI Xiao-dong; LI Gang; JIAO Jin-pe

doi:10.3788/fgxb20133407.0866

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Dynamic Process of Green Upconversion Emission from Ho³⁺ Under Square Wave Excitation

更新时间：2020-08-12

- Dynamic Process of Green Upconversion Emission from Ho³⁺ Under Square Wave Excitation
- Chinese Journal of Luminescence Vol. 34, Issue 7, Pages: 866-871(2013)
- 作者机构：
  
  1. 河北大学物理科学与技术学院,河北保定,071002
  2. 航天长征火箭技术有限公司北京,100076
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133407.0866
  CLC： O482.31
- Received：11 April 2013，
  
  Revised：03 May 2013，
  
  Published：10 July 2013
- 稿件说明：
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杨艳民, 米超, 刘琳琳, 张娇, 于芳, 李晓东, 李刚, 焦金鹏. 方波激发下Ho3+上转换绿色发光粉的激发机理[J]. 发光学报, 2013,34(7): 866-871

YANG Yan-min, MI Chao, LIU Lin-lin, ZHANG Jiao, YU Fang, LI Xiao-dong, LI Gang, JIAO Jin-peng. Dynamic Process of Green Upconversion Emission from Ho3+ Under Square Wave Excitation[J]. Chinese Journal of Luminescence, 2013,34(7): 866-871
杨艳民, 米超, 刘琳琳, 张娇, 于芳, 李晓东, 李刚, 焦金鹏. 方波激发下Ho3+上转换绿色发光粉的激发机理[J]. 发光学报, 2013,34(7): 866-871 DOI： 10.3788/fgxb20133407.0866.

YANG Yan-min, MI Chao, LIU Lin-lin, ZHANG Jiao, YU Fang, LI Xiao-dong, LI Gang, JIAO Jin-peng. Dynamic Process of Green Upconversion Emission from Ho3+ Under Square Wave Excitation[J]. Chinese Journal of Luminescence, 2013,34(7): 866-871 DOI： 10.3788/fgxb20133407.0866.

摘要

采用溶胶-凝胶法制备了BaGd

ZnO

:Yb

的发光材料

测量了样品在不同激发密度下的上转换光发射光谱。用方波调制的971 nm LD激光激发样品得到上转换绿光发射的上升和衰减变化曲线

通过建立Ho

离子

(

)和

能级及Yb

离子

5/2

能级的速率方程

并利用速率方程对绿光的上升和衰减过程进行拟合

确定了Yb

离子

5/2

能级寿命及Ho

离子

(

)和

的能级寿命

并证实在Ho

离子能级粒子数布居趋于稳定时

的能量传递是Ho

离子

(

)能级粒子的主要布居途径

而激发态吸收对粒子布居数的贡献较小。

Abstract

and Ho

codoped BaGd

ZnO

phosphors were synthesized by using the sol-gel method. The upconversion emission spectra of BaGd

ZnO

:Yb

phosphors were measured under the excitation of 971 nm LD laser at different excitation density. Under the excitation of 971 nm LD laser modulated by a square wave signal

the excited and decay processes of green upconversion luminescence in Yb

/Ho

codoped BaGd

ZnO

were observed by an oscilloscope. The rate equations of energy level

(

)

with Ho

ion and energy level

5/2

with Yb

ion were built to analyze the upconversion mechanism in Yb

/Ho

codoped system

then the rate equation of the energy level

(

) with Ho

ion was used to fit this processe in order to determine the lifetime of the energy levels. When excitation is steady

the population of

(

) energy level with Ho

ion mainly come from the energy transfer from Yb

to Ho

and the effect of excited state absorption was able to be ignored.

关键词

Keywords

references

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