Preparation and Up-conversion Emissions of Er3+ Doped Ln2Sn2O7 Nanocrystals

CHEN Ju; DING Ling-hong; ZHANG Wei-feng

doi:10.3788/fgxb20133411.1451

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Preparation and Up-conversion Emissions of Er³⁺ Doped Ln₂Sn₂O₇ Nanocrystals

更新时间：2020-08-12

- Preparation and Up-conversion Emissions of Er³⁺ Doped Ln₂Sn₂O₇ Nanocrystals
- Chinese Journal of Luminescence Vol. 34, Issue 11, Pages: 1451-1456(2013)
- 作者机构：
  
  河南大学物理与电子学院光伏材料省重点实验室,河南开封,475004
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133411.1451
  CLC： O482.31
- Received：07 July 2013，
  
  Revised：24 July 2013，
  
  Published：10 November 2013
- 稿件说明：
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陈菊, 丁玲红, 张伟风. Ln2Sn2O7：Er3+纳米晶的制备及发光性能研究[J]. 发光学报, 2013,34(11): 1451-1456

CHEN Ju, DING Ling-hong, ZHANG Wei-feng. Preparation and Up-conversion Emissions of Er3+ Doped Ln2Sn2O7 Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(11): 1451-1456
陈菊, 丁玲红, 张伟风. Ln2Sn2O7：Er3+纳米晶的制备及发光性能研究[J]. 发光学报, 2013,34(11): 1451-1456 DOI： 10.3788/fgxb20133411.1451.

CHEN Ju, DING Ling-hong, ZHANG Wei-feng. Preparation and Up-conversion Emissions of Er3+ Doped Ln2Sn2O7 Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(11): 1451-1456 DOI： 10.3788/fgxb20133411.1451.

摘要

采用溶胶-凝胶法合成

:Er

(

=La

Y)纳米晶。通过X射线衍射和场发射扫描电子显微镜测试了样品的晶体结构和形貌

同时对样品的上转换发光性能进行了测试。结果表明:在980 nm连续激发光的激发下

样品主要表现为绿光发射。发射中心在528

549 nm的绿光和672 nm处的红光发射分别对应Er

离子的

3/2

15/2

、

11/2

15/2

和

9/2

15/2

跃迁。以La

:Er

纳米晶为例

离子的摩尔分数为7%、退火温度为1 150℃是其制备的最佳条件

此时其各个发射峰的强度最高。对La

:Er

的发光强度与激发功率关系的研究表明

其绿光和红光发射均为双光子过程。激发光吸收和能量转移是La

:Er

纳米晶上转换发光的主要机制。

Abstract

doped

(

=La

Y) nanocrystals were fabricated by sol-gel method. The crystal structure and morphologies were investigated by XRD and SEM

and the up-conversion spectroscopic properties of the samples were also investigated. Under the excitation of a 980 nm diode laser

the samples mainly emit bright green light. The strong green and red up-conversion emissions which centered at 549

528

and 672 nm

respectively. They were assigned to the transitions of

11/2

15/2

3/2

15/2

and

9/2

15/2

energy levels of Er

ions. Taking La

:Er

nanocrystal for example

the most efficient up-conversion emission can be obtained when the annealing temperature is 1 150℃ and the mole fraction of Er

is 7%. The dependence of the intensity of up-conversion emissions upon the excitation power of the diode laser suggests that two-photon absorption processes are involved in the green and red up-conversion luminescence. The excited state absorption and energy transfer process are regarded as the main up-conversion emission mechanism of La

:Er

nanocrystals.

关键词

Keywords

references

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