scholarly journals Upconversion Nanoparticles: Millisecond‐Timescale, High‐Efficiency Modulation of Upconversion Luminescence by Photochemically Derived Graphene (Advanced Optical Materials 24/2019)

2019 ◽  
Vol 7 (24) ◽  
pp. 1970092
Author(s):  
Simone Lamon ◽  
Yiming Wu ◽  
Qiming Zhang ◽  
Xiaogang Liu ◽  
Min Gu
Keyword(s):  
Optical Materials ◽  
High Efficiency ◽  
Upconversion Luminescence ◽  
Upconversion Nanoparticles

Highly efficient BODIPY-doped upconversion nanoparticles for deep-red luminescence bioimaging in vivo

2021 ◽  
Author(s):  
Ti Jia ◽  
Qiuhong Wang ◽  
Ming Xu ◽  
Wei Yuan ◽  
Wei Feng ◽  
...  
Keyword(s):  
High Efficiency ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Water Soluble ◽  
Upconversion Nanoparticles ◽  
Highly Efficient ◽  
Red Luminescence

We demonstrate a 3,5-di(p-oxethyl)styryl conjugated BODIPY showing deep-red upconversion luminescence with a high efficiency of 16.6%. Furthermore, water-soluble BODIPY-doped upconversion nanoparticles with efficiency up to 6.9% under low excitation power...

Optical Temperature Sensing of Core-Shell Structured NaYF4:Yb3+, Er3+@NaYF4 Nanocrystals with Different Shell Thickness

2015 ◽  
Vol 738-739 ◽  
pp. 27-30
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Shell Thickness ◽  
Thermal Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Sensing Properties ◽  
The Core ◽  
Β Phase ◽  
Biomedical Fields

Hexagonal (β)-phase NaYF4:Yb3+, Er3+ upconversion nanoparticles (UCNPs) with and without an inert (undoped NaYF4) shell have been successfully synthesized and the effects of shell thickness on the upconversion luminescence (UCL) and temperature sensing properties were systematically investigated. It was found that the NaYF4 shell and its thickness do not affect the RHS values and thermal sensitivity, but can obviously improve the UCL intensity of NaYF4:Yb3+, Er3+ UCNPs. It implies that the core-shell structured NaYF4:Yb3+, Er3+@NaYF4 UCNPs with excellent UCL properties have great potential to be used as temperature sensing probes in biomedical fields, without considering the influences of the shell thickness on their temperature sensing properties.

scholarly journals Modulation of activator distribution by phase-separation of glass for efficient and tunable upconversion luminescence

RSC Advances ◽  
2020 ◽  
Vol 10 (21) ◽  
pp. 12217-12223 ◽  
Author(s):  
Yi Long ◽  
Jianfeng Li ◽  
Zaijin Fang ◽  
Bai-Ou Guan
Keyword(s):  
Phase Separation ◽  
High Efficiency ◽  
Upconversion Luminescence

Active ions are confined in separated fluoride networks by phase-separation of glass for achieving high-efficiency and tunable luminescence.

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