NaYF4:Yb3+,
Ln 3+@NaYF4:Yb3+@NaYF4(Ln =Ho, Tm)核-双层壳纳米晶中Yb3+调控的高效上转换发光Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4: Yb3+,
Ln 3+@NaYF4: Yb3+@NaYF4 (Ln =Ho, Tm) Nanocrystals- 发光学报 2020年41卷第9期 页码：1102-1113
- 作者机构：
1.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：National Natural Science Foundation of China;National Natural Science Foundation of
DOI：10.37188/fgxb20204109.1102
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廖华珍, 肖萍, 叶松, 等. NaYF4:Yb3+,
Ln 3+@NaYF4:Yb3+@NaYF4(Ln =Ho, Tm)核-双层壳纳米晶中Yb3+调控的高效上转换发光[J]. 发光学报, 2020,41(9):1102-1113.Hua-zhen LIAO, Ping XIAO, Song YE, et al. Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4: Yb3+,
Ln 3+@NaYF4: Yb3+@NaYF4 (Ln =Ho, Tm) Nanocrystals[J]. Chinese Journal of Luminescence, 2020,41(9):1102-1113.廖华珍, 肖萍, 叶松, 等. NaYF4:Yb3+,
Ln 3+@NaYF4:Yb3+@NaYF4(Ln =Ho, Tm)核-双层壳纳米晶中Yb3+调控的高效上转换发光[J]. 发光学报, 2020,41(9):1102-1113. DOI： 10.37188/fgxb20204109.1102.Hua-zhen LIAO, Ping XIAO, Song YE, et al. Highly Enhanced Upconversion Luminescence Through Partially Isolate Yb3+ in Core-shell-shell Structured NaYF4: Yb3+,
Ln 3+@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,3+,/,Ln,3+,（,Ln,=Ho,3+,，Tm,3+,）掺杂β-NaYF,4,核纳米晶，在此基础上构建了NaYF,4,:Yb,3+,，,Ln,3+,@NaYF,4,:Yb,3+,@NaYF,4,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,3+,、并进一步生长最外层的惰性壳能够有效地提高Ho,3+,和Tm,3+,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,3+,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,3+,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,3+,/,Ln,3+, (,Ln,=Ho,3+, and Tm,3+,) doped β-NaYF,4, core nanocrystals(NCs) with sub-10 nm size were synthesized with co-precipitation method, based on which the core-shell-shell structured NaYF,4,:Yb,3+,Ln,3+,@NaYF,4,:Yb,3+,@NaYF,4, 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,3+, 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,3+, and Tm,3+, which is resulted from the enhanced absorption of 980 nm excitation light and energy transfer efficiency ascribing to the increased Yb,3+, concentration quenching threshold. Moreover, through adjusting Yb,3+, 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
上转换发光核-双层壳结构β-NaYF4
Keywords
upconversioncore-shell-shell structureβ-NaYF4
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