scholarly journals Enhanced Upconversion Luminescence in Yb3+/Tm3+-Codoped Fluoride Active Core/Active Shell/Inert Shell Nanoparticles through Directed Energy Migration

Nanomaterials ◽  
2014 ◽  
Vol 4 (1) ◽  
pp. 55-68 ◽  
Author(s):  
Hailong Qiu ◽  
Chunhui Yang ◽  
Wei Shao ◽  
Jossana Damasco ◽  
Xianliang Wang ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Energy Migration ◽  
Shell Nanoparticles ◽  
Active Core ◽  
Directed Energy

Active-core/active-shell nanostructured design: an effective strategy to enhance Nd3+/Yb3+ cascade sensitized upconversion luminescence in lanthanide-doped nanoparticles

2015 ◽  
Vol 3 (29) ◽  
pp. 7652-7657 ◽  
Author(s):  
Xiaoyong Huang ◽  
Jun Lin
Keyword(s):  
Upconversion Luminescence ◽  
Effective Strategy ◽  
Shell Nanoparticles ◽  
Active Core

Giant enhancement of Nd3+–Yb3+ cascade sensitized upconversion luminescence has been achieved in lanthanide-doped active-core/active-shell nanoparticles.

Highly enhanced upconversion luminescence in lanthanide-doped active-core/luminescent-shell/active-shell nanoarchitectures

2016 ◽  
Vol 4 (13) ◽  
pp. 2432-2437 ◽  
Author(s):  
Mingye Ding ◽  
Daqin Chen ◽  
Danyang Ma ◽  
Jianbin Dai ◽  
Yuting Li ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Upconversion Luminescence ◽  
Synergistic Action ◽  
Significant Enhancement ◽  
Active Core ◽  
Suppression Effects

Through active-core/luminescent-shell/active-shell engineering in lanthanide-doped fluoride nanocrystals, significant enhancement of UC emission intensity has been successfully realized under the synergistic action of double sensitization and suppression effects.

One-pot synthesis of ultrasmall β-NaGdF4 nanoparticles with enhanced upconversion luminescence

2019 ◽  
Vol 7 (29) ◽  
pp. 8898-8904 ◽  
Author(s):  
Chunyan Cheng ◽  
Yueshan Xu ◽  
Songtao Liu ◽  
Yuanyuan Liu ◽  
Xian Wang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Upconversion Luminescence ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quality ◽  
Shell Nanoparticles ◽  
One Pot ◽  
High Quantum ◽  
One Pot Synthesis ◽  
Core Shell Nanoparticles

High quality β-NaGdYF4:Yb/Er and high quantum yield β-NaGdF4:Yb/Er@β-NaYF4 core shell nanoparticles were synthesized.

scholarly journals Synthesis of Small Ce3+-Er3+-Yb3+ Tri-Doped BaLuF5 Active-Core-Active-Shell-Active-Shell Nanoparticles with Strong Down Conversion Luminescence at 1.5 μm

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 615 ◽  
Author(s):  
Yongling Zhang ◽  
Yudi Shi ◽  
Zhengkun Qin ◽  
Mingxing Song ◽  
Weiping Qin
Keyword(s):  
Communication Systems ◽  
Optical Fiber Communication ◽  
Pump Light ◽  
Layer By Layer ◽  
Shell Nanoparticles ◽  
Fiber Communication ◽  
Active Core ◽  
Surface Quenching ◽  
High Boiling Solvent ◽  
Down Conversion

Small fluoride nanoparticles (NPs) with strong down-conversion (DC) luminescence at 1.5 μm are quite desirable for optical fiber communication systems. Nevertheless, a problem exists regarding how to synthesize small fluoride NPs with strong DC emission at 1.5 μm. Herein, we propose an approach to improve 1.5 μm emission of BaLuF5:Yb3+,Er3+ NPs by way of combining doping Ce3+ ions and coating multiple BaLuF5: Yb3+ active-shells. We prepared the BaLuF5:18%Yb3+,2%Er3+,2%Ce3+ NPs through a high-boiling solvent method. The effect of Ce3+ concentration on the DC luminescence was systematically investigated in the BaLuF5:Yb3+,Er3+ NPs. Under a 980 nm laser excitation, the intensities of 1.53 μm emission of BaLuF5:18%Yb3+,2%Er3+,2%Ce3+ NPs was enhanced by 2.6 times comparing to that of BaLuF5:18%Yb3+,2%Er3+ NPs since the energy transfer between Er3+ and Ce3+ ions: Er3+:4I11/2 (Er3+) + 2F5/2 (Ce3+) → 4I13/2 (Er3+) + 2F7/2 (Ce3+). Then, we synthesized BaLuF5:18%Yb3+,2%Er3+,2%Ce3+@BaLuF5:5%Yb3+@BaLuF5:5%Yb3+ core-active-shell-active-shell NPs via a layer-by-layer strategy. After coating two BaLuF5:Yb3+ active-shell around BaLuF5:Yb3+,Er3+,Ce3+ NPs, the intensities of the 1.53 μm emission was enhanced by 44 times compared to that of BaLuF5:Yb3+,Er3+ core NPs, since the active-shells could be used to not only suppress surface quenching but also to transfer the pump light to the core region efficiently through Yb3+ ions inside the active-shells.

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