Influence of Na+ Doping on Upconversion Luminescence of LiYF4：Er3+/Yb3+ Microcrystals

DING Yan-li; ZHANG Xiao-dan; LIANG Xue-jiao; XU Sheng-zhi; WEI Chang-chun; ZHAO Ying

doi:10.3788/fgxb20143505.0536

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Influence of Na⁺ Doping on Upconversion Luminescence of LiYF₄：Er³⁺/Yb³⁺ Microcrystals

更新时间：2020-08-12

- Influence of Na⁺ Doping on Upconversion Luminescence of LiYF₄：Er³⁺/Yb³⁺ Microcrystals
- Chinese Journal of Luminescence Vol. 35, Issue 5, Pages: 536-541(2014)
- 作者机构：
  
  1. 南开大学光电子薄膜器件与技术研究所, 光电子薄膜器件与技术天津市重点实验室, 光学信息技术科学教育部重点实验室天津,300071
  2. 商丘师范学院,河南商丘,476000
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143505.0536
  CLC： O482.31
- Received：25 December 2013，
  
  Revised：20 January 2014，
  
  Published Online：07 March 2014，
  
  Published：03 May 2014
- 稿件说明：
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丁艳丽, 张晓丹, 梁雪娇等. Na+掺杂对LiYF4：Er3+/Yb3+上转换发光性能的影响[J]. 发光学报, 2014,35(5): 536-541

DING Yan-li, ZHANG Xiao-dan, LIANG Xue-jiao etc. Influence of Na+ Doping on Upconversion Luminescence of LiYF4：Er3+/Yb3+ Microcrystals[J]. Chinese Journal of Luminescence, 2014,35(5): 536-541
丁艳丽, 张晓丹, 梁雪娇等. Na+掺杂对LiYF4：Er3+/Yb3+上转换发光性能的影响[J]. 发光学报, 2014,35(5): 536-541 DOI： 10.3788/fgxb20143505.0536.

DING Yan-li, ZHANG Xiao-dan, LIANG Xue-jiao etc. Influence of Na+ Doping on Upconversion Luminescence of LiYF4：Er3+/Yb3+ Microcrystals[J]. Chinese Journal of Luminescence, 2014,35(5): 536-541 DOI： 10.3788/fgxb20143505.0536.

摘要

上转换发光材料由于低的发光效率，限制了其在太阳电池中的实际应用。为解决此问题，采用溶剂热法制备了LiYF

：Er

/Yb

上转换发光颗粒，在LiYF

基质中引入Na

来打破Er

周围晶体场的对称性，增强其发光性能。研究了Na

掺杂对LiYF

：Er

/Yb

的结构、形貌及其发光的影响。结果表明：掺杂的Na

可以裁剪Er

周围的晶体场，当Na

摩尔分数为15%时，得到了较大的发光增强，绿光和红光发射分别获得4.2倍和2.9倍的增强。Er

周围晶体场对称性的降低和材料中OH基团的减少是其发光增强的主要原因。

Abstract

The applications of the upconversion (UC) phosphors in solar cells are still constrained because of their relatively low luminescence efficiency. In this work

LiYF

:Er

/Yb

co-doped with different concentrations of Na

was prepared by a simple and green hydrothermal procedure. The co-doping of Na

was proposed to enhance UC luminescence of LiYF

:Er

/Yb

microcrystals. The influence of Na

on the crystal structure

morphology and luminescence of LiYF

:Er

/Yb

was investigated. The results indicate that the co-doping of Na

can tailor the local crystal field around Er

. Compared with LiYF

:Er

/Yb

the green and red emission intensities of LiYF

:Er

/Yb

co-doped with 15% Na

are enhanced by about 4.2 and 2.9 times

respectively. The distortion of the local symmetry and the reduction of OH groups are confirmed to be the origin of the improvement.

关键词

Keywords

references

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