Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4: Yb3+, <italic style="font-style: italic">Ln</italic>3+@NaYF4: Yb3+@NaYF4 (<italic style="font-style: italic">Ln</italic>=Ho, Tm) Nanocrystals

Hua-zhen LIAO; Ping XIAO; Song YE; De-ping WANG

doi:10.37188/fgxb20204109.1102

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Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb³⁺ in Core-shell-shell Structured NaYF₄: Yb³⁺, Ln³⁺@NaYF₄: Yb³⁺@NaYF₄ (Ln=Ho, Tm) Nanocrystals

Synthesis and Properties of Materials | 更新时间：2020-09-10

- Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb³⁺ in Core-shell-shell Structured NaYF₄: Yb³⁺, Ln³⁺@NaYF₄: Yb³⁺@NaYF₄ (Ln=Ho, Tm) Nanocrystals
- Chinese Journal of Luminescence Vol. 41, Issue 9, Pages: 1102-1113(2020)
- 作者机构：
  
  同济大学材料科学与工程学院, 上海 201804
- 作者简介：
  
  [ "廖华珍(1995-), 女, 福建龙岩人, 博士研究生, 2017年于华侨大学获得学士学位, 主要从事稀土掺杂发光材料的研究。E-mail:liaohuazhen@tongji.edu.cn" ]
  [ "叶松(1978-), 女, 辽宁鞍山人, 博士, 副教授, 博士研究生导师, 2007年于中国科学院长春光学精密机械与物理研究所获得博士学位, 主要从事稀土掺杂发光材料的研究。E-mail:yesong@tongji.edu.cn" ]
- 基金信息：
  
  国家自然科学基金;国家自然科学基金;上海市自然科学基金;国家重点研发计划
- DOI：10.37188/fgxb20204109.1102
  CLC： O482.31
- Received：18 June 2020，
  
  Accepted：07 July 2020，
  
  Published：2020-09
- 稿件说明：
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Hua-zhen LIAO, Ping XIAO, Song YE, et al. Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb³⁺ in Core-shell-shell Structured NaYF₄: Yb³⁺, Ln³⁺@NaYF₄: Yb³⁺@NaYF₄ (Ln=Ho, Tm) Nanocrystals[J]. Chinese journal of luminescence, 2020, 41(9): 1102-1113.
DOI：

Hua-zhen LIAO, Ping XIAO, Song YE, et al. Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb³⁺ in Core-shell-shell Structured NaYF₄: Yb³⁺, Ln³⁺@NaYF₄: Yb³⁺@NaYF₄ (Ln=Ho, Tm) Nanocrystals[J]. Chinese journal of luminescence, 2020, 41(9): 1102-1113. DOI： 10.37188/fgxb20204109.1102.

摘要

采用共沉淀法合成了尺寸小于10 nm的Yb

（

=Ho

，Tm

）掺杂β-NaYF

核纳米晶，在此基础上构建了NaYF

:Yb

，

@NaYF

:Yb

@NaYF

核-双层壳结构纳米晶，并通过XRD和TEM测试证明了中间活性壳和最外层惰性壳的成功包覆。光谱结果表明，在活性核和活性壳中分别掺杂Yb

、并进一步生长最外层的惰性壳能够有效地提高Ho

和Tm

的上转换发射强度，这是由核-双层壳结构纳米晶对980 nm激发光的吸收增强以及Yb

浓度猝灭阈值的提高所引起的高效能量传递共同导致的。此外，通过调节中间壳层中的Yb

掺杂浓度，可以获得高效可调发光。本研究为开发多色高效上转换发光纳米晶提供了一条有效的途径。

Abstract

In this research

the Yb

(

=Ho

and Tm

) doped β-NaYF

core nanocrystals(NCs) with sub-10 nm size were synthesized with co-precipitation method

based on which the core-shell-shell structured NaYF

:Yb

@NaYF

:Yb

@NaYF

NCs were constructed. The successfully growth of the middle active-shell and the outmost inert-shell were proved by XRD and TEM measurements. The spectral results indicated that partially isolate Yb

dopant in active-core and active-shell and the growth of the outmost inert-shell can effectively improve the upconversion(UC) emission intensity of Ho

and Tm

which is resulted from the enhanced absorption of 980 nm excitation light and energy transfer efficiency ascribing to the increased Yb

concentration quenching threshold. Moreover

through adjusting Yb

doping concentration in the middle-shell

the tunable emission can be obtained. This research suggested a general route for the development of highly-efficient luminescent upconversion nanocrystals(UCNCs) in a broad color range.

关键词

Keywords

references

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Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4: Yb3+, Ln3+@NaYF4: Yb3+@NaYF4 (Ln=Ho, Tm) Nanocrystals

DOI：10.37188/fgxb20204109.1102

摘要

Abstract

关键词

Keywords

references

Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb³⁺ in Core-shell-shell Structured NaYF₄: Yb³⁺, Ln³⁺@NaYF₄: Yb³⁺@NaYF₄ (Ln=Ho, Tm) Nanocrystals