Sizedependenceofup-conversionluminescenceofNaYF4:Yb3+/Tm3+

被引：1

作者：

刘晓戈 ^{[1
]}

代如成 ^{[1
]}

王中平 ^{[2
]}

张增明 ^{[2
]}

机构：

[1] Department of Physics,University of Science and Technology of China

[2] The Centre of Physical Experiments,University of Science and Technology of China

来源：

JournalofRareEarths | 2010年 / 28(S1)卷 / S1期

关键词：

NaYF4:Yb3+/Tm3+; upconversion; luminescence; surface area; rare earths;

D O I：

暂无

中图分类号：

TG146.45 [];

学科分类号：

080502 ;

摘要：

Tm3+/Yb3+ codoped NaYF4 microcrystals were synthesized using a hydrothermal method.The bright upconversion light was observed under 980 nm excitation.The upconversion luminescence was systematically investigated at different Yb3+ concentrations and different reaction temperatures and time.The sample with 60% Yb3+ concentration and reacting at 180 oC for 24 h possessed the highest luminescent efficiency.The higher luminescent efficiency was contributed to a large surface area.The large surface area induced the large vibration mode by absorbed H2O and CO2.The larger vibration mode could enhance the energy transfer efficiency from the excited Yb3+ to Tm3+ by the process of phonon assisted energy transfer.

引用

页码：215 / 218

页数：4

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