Upconversion Luminescence of MgSc2O4: Er3+/Yb3+ Nanocrystals Co-doped Alkali Ions

Mei-juan YUANG; Jing LI; Hui-lian QIN; Ya-ru PENG; Yu-xin HUANG; Li CHEN

doi:10.37188/CJL.20200294

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Upconversion Luminescence of MgSc₂O₄: Er³⁺/Yb³⁺ Nanocrystals Co-doped Alkali Ions

Synthesis and Properties of Materials | 更新时间：2020-11-10

- Upconversion Luminescence of MgSc₂O₄: Er³⁺/Yb³⁺ Nanocrystals Co-doped Alkali Ions
- Chinese Journal of Luminescence Vol. 41, Issue 11, Pages: 1351-1357(2020)
- 作者机构：
  
  1.长春工业大学化学与生命学院&材料科学高等研究院, 吉林长春 130012
  2.长春工业大学材料科学与工程学院, 吉林长春 130012
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;National Natural Science Foundation of
- DOI：10.37188/CJL.20200294
  CLC：
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Mei-juan YUANG, Jing LI, Hui-lian QIN, et al. Upconversion Luminescence of MgSc₂O₄: Er³⁺/Yb³⁺ Nanocrystals Co-doped Alkali Ions. [J]. Chinese Journal of Luminescence 41(11):1351-1357(2020)
DOI：

Mei-juan YUANG, Jing LI, Hui-lian QIN, et al. Upconversion Luminescence of MgSc₂O₄: Er³⁺/Yb³⁺ Nanocrystals Co-doped Alkali Ions. [J]. Chinese Journal of Luminescence 41(11):1351-1357(2020) DOI： 10.37188/CJL.20200294.

摘要

通过水热法制备了碱金属离子(Li,+,、Na,+,、K,+,)共掺的MgSc,2,O,4,:Er,3+,/Yb,3+,纳米晶，获得类球状纳米晶的平均尺寸约为35 nm。通过改变碱金属离子的种类和数量，获得了增强上转换发光。发现K,+,离子共掺MgSc,2,O,4,:Er,3+,/Yb,3+,纳米晶发光强度最佳，并且随着K,+,掺杂量的不断增加，纳米晶的发射强度逐渐增强，这是由于K,+,离子引入了最大的晶体场不对称性。随后，通过调控Yb,3+,和Er,3+,的掺杂浓度，发现发光强度最强样品为K,+,离子共掺MgSc,2,O,4,:1% Er,3+,/5% Yb,3+,纳米晶。研究了在980 nm激光激发下，MgSc,2,O,4,纳米晶中Yb,3+,与Er,3+,离子之间的能量传递以及上转换发光机制。

Abstract

The alkali ions(Li,+,/Na,+,/K,+,) co-doped MgSc,2,O,4,:Er,3+,/Yb,3+, nanocrystals have been synthesized by hydrothermal method. The average size of obtained spheroid nanocrystals is about 35 nm. The upconversion luminescence intensity can be strengthened by adjusting alkali ions types and contents. The K,+, ions co-doped MgSc,2,O,4,:Er,3+,/Yb,3+, nanocrystals display the strongest luminescence. As K,+, content increasing, emission intensity can be enhanced gradually due to the large asymmetry of crystal field created by K,+, ions. The spectral properties of K,+, ions co-doped MgSc,2,O,4,:Er,3+,/Yb,3+, nanocrystals are described in detail as a function of Er,3+, and Yb,3+, concentrations. The MgSc,2,O,4,:1%Er,3+,/5%Yb,3+, nanocrystal was optimized for the strongest upconversion luminescence. Then, the upconversion mechanism and energy transfer processes between Yb,3+, ions and Er,3+, ions in K,+, ions co-doped MgSc,2,O,4,:Er,3+,/Yb,3+, nanocrystals were investigated under the 980 nm excitation.

关键词

上转换发光稀土离子碱金属水热法MgSc2O4

Keywords

upconversion luminescencerare earth ionalkali ionshydrothermal methodMgSc2O4

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