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1.中国科学院长春光学精密机械与物理研究所 发光学及应用国家重点实验室, 吉林 长春 130033
2.中国科学院大学, 北京 100049
Published:05 September 2023,
Received:19 April 2023,
Revised:04 May 2023,
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杨润,陈浩然,涂浪平等.反向能量传递增强Er3+上转换发光[J].发光学报,2023,44(09):1552-1559.
YANG Run,CHEN Haoran,TU Langping,et al.Back Energy Transfer Enhances Er3+ Upconversion Luminescence[J].Chinese Journal of Luminescence,2023,44(09):1552-1559.
杨润,陈浩然,涂浪平等.反向能量传递增强Er3+上转换发光[J].发光学报,2023,44(09):1552-1559. DOI: 10.37188/CJL.20230100.
YANG Run,CHEN Haoran,TU Langping,et al.Back Energy Transfer Enhances Er3+ Upconversion Luminescence[J].Chinese Journal of Luminescence,2023,44(09):1552-1559. DOI: 10.37188/CJL.20230100.
提高上转换发光效率是促进上转换发光材料实际应用的关键。在NaErF
4
@NaYF
4
体系中,惰性NaYF
4
壳层可以抑制高组分Er
3+
掺杂下的发光浓度猝灭,其上转换发光主要来源于Er
3+
⁃Er
3+
的能量传递上转换。本文利用共沉淀法制备了Er
3+
和Yb
3+
分区掺杂的NaErF
4
@NaYbF
4
@NaYF
4
核壳结构的纳米颗粒,通过包覆惰性壳层研究Er
3+
⁃Yb
3+
⁃Er
3+
之间的能量传递和反向能量传递过程。由于808 nm波长只能激发Er
3+
而不能激发Yb
3+
,因此在808 nm波长激发下,Er
3+
在惰性壳层的保护作用下将激发态能量传递给Yb
3+
,随后通过反向能量传递回Er
3+
,使得Er
3+
的上转换发光增强。实验结果发现,当中间层Yb
3+
掺杂浓度为100%时,绿色和红色上转换发光最大增强倍数为24.9和9.79。
Improving the upconversion luminescence efficiency is the key to promoting the practical application of upconversion luminescent materials. In the NaErF
4
@NaYF
4
system, the inert NaYF
4
shell can inhibit the concentration quenching under high Er
3+
doping, and the upconversion luminescence is mainly from the energy transfer upconversion of Er
3+
-Er
3+
. In this paper, Er
3+
and Yb
3+
partition doped NaErF
4
@NaYbF
4
@NaYF
4
core-shell nanoparticles were prepared by the coprecipitation method, and the energy transfer and back energy transfer processes between Er
3+
-Yb
3+
-Er
3+
was studied. Since the 808 nm can only excite Er
3+
but not Yb
3+
, under 808 nm excitation, Er
3+
harvests the pumping energy and transfers it to Yb
3+
and subsequently back to Er
3+
due to the protection offered by NaYF
4
inert outer shell, which finally enhances the upconversion luminescence of Er
3+
. When the doping concentration of Yb
3+
in the intermediate layer is 100%, the maximum enhancement multiple is 24.9 and 9.79 for green and red upconversion, respectively.
稀土纳米材料上转换发光反向能量传递β-NaErF4
rare earth nanoparticlesupconversion luminescenceback energy transferβ-NaErF4
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