Enhancing Upconversion Luminescence of LiYF4:Yb,Er Nanocrystals by Cd2+ Doping and Core–Shell Structure

2017 ◽  
Vol 121 (34) ◽  
pp. 18909-18916 ◽  
Author(s):  
Yiru Zhu ◽  
Shuwen Zhao ◽  
Bin Zhou ◽  
Hao Zhu ◽  
Youfa Wang
Keyword(s):  
Shell Structure ◽  
Upconversion Luminescence ◽  
Core Shell ◽  
Core Shell Structure

scholarly journals Upconversion luminescence in sub-10 nm β-NaGdF4:Yb3+,Er3+ nanoparticles: an improved synthesis in anhydrous ionic liquids

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 34784-34792
Author(s):  
Gabriella Tessitore ◽  
Anja-Verena Mudring ◽  
Karl W. Krämer
Keyword(s):  
Ionic Liquids ◽  
Shell Structure ◽  
Emission Intensity ◽  
Bulk Material ◽  
Upconversion Luminescence ◽  
Microwave Assisted Synthesis ◽  
Core Shell ◽  
Microwave Assisted ◽  
Core Shell Structure ◽  
Nanoparticle Emission

The microwave-assisted synthesis of β-NaGdF4:Er3+,Yb3+ in anhydrous ionic liquids yields efficient upconversion luminescence nanoparticles. A core–shell structure raises the nanoparticle emission intensity to 0.12% of the bulk material.

scholarly journals Efficient Color Tuning of Upconversion Luminescence from Core-Shell Oxysulfide Nanoparticles

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Ying Tian ◽  
Jianxin Jiao ◽  
Xin Feng ◽  
Mingming Xing ◽  
Yong Peng ◽  
...  
Keyword(s):  
Shell Structure ◽  
Upconversion Luminescence ◽  
Cross Relaxation ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Luminescence Efficiency ◽  
Core Shell Structure ◽  
Core Shell Nanoparticles ◽  
Triple Ion

The Y2O2S:Er3+@Y2O2S:Yb3+,Ho3+ core-shell up-conversion (UC) nanoparticles were successfully synthesized by the homogeneous co-precipitation method. The Y2O2S:Er3+@Y2O2S:Yb3+,Ho3+ core-shell nanoparticles exhibit bright green emissions under 980 nm excitation, while the triple-ion doped Y2O2S:Er3+,Yb3+,Ho3+ sample presents mainly red emissions. The intensity ratio of green-to-red emission of the core-shell and conventional triple-ion doped samples are 2.8 and 0.3, respectively. Investigations on the UC mechanisms show that emissions from Er3+ and Ho3+ ions are achieved simultaneously in the core-shell nanoparticles. This is due to the efficient energy transfers of Yb3+→Ho3+ within the shell layer and Yb3+→Er3+ between the shell and the core. While the triple-ion doped Y2O2S: Er3+,Yb3+,Ho3+ sample exhibits mainly the emissions of Er3+ along with weak luminescence of Ho3+ ion. Since the cross relaxation between Er3+ and Ho3+ ions in the Y2O2S:Er3+,Yb3+,Ho3+ nanoparticles can effectively suppress the emissions of Ho3+ ions. Yet, in the core-shell structure, this cross relaxation can be successfully restrained in the core-shell structure where Er3+ is in the core and Ho3+ is in the shell. Therefore, the construction of core-shell structure can improve the luminescence efficiency and provide a route for adjustment of emission color.

scholarly journals Homo–hetero/core–shell structure design strategy of NaYF4 nanocrystals for superior upconversion luminescence

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 20746-20751
Author(s):  
Raheel Ahmed Janjua ◽  
Obaid Iqbal ◽  
Muhammad Aqeel Ahmed ◽  
Abdullah A. Al-Kahtani ◽  
Sara Saeed ◽  
...  
Keyword(s):  
Shell Structure ◽  
Upconversion Luminescence ◽  
Design Strategy ◽  
Structure Design ◽  
Shell Structures ◽  
Core Shell ◽  
Core Shell Structure

Establishment of essential conditions of different phases of NaYF4 and their utilization for the synthesis of core/shell structures to achieve the enhancement of UCL intensities.

Electrical Conductivity of Ni-YSZ Anode for SOFCs According to the Ni Powder Size Variations in Core-shell Structure

2015 ◽  
Vol 53 (4) ◽  
pp. 287-293
Author(s):  
Byung-Hyun Choi ◽  
Young Jin Kang ◽  
Sung-Hun Jung ◽  
Yong-Tae An ◽  
Mi-Jung Ji
Keyword(s):  
Electrical Conductivity ◽  
Shell Structure ◽  
Core Shell ◽  
Powder Size ◽  
Ni Powder ◽  
Core Shell Structure

Preparation of Porous Core/Shell Structure Fe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;3$lt;/inf$gt;/Al Nanothermite Membrane by Template Method

2015 ◽  
Vol 30 (6) ◽  
pp. 610 ◽  
Author(s):  
ZHENG Guo-Qiang ◽  
ZHANG Wen-Chao ◽  
XU Xing ◽  
SHEN Rui-Qi ◽  
DENG Ji-Ping ◽  
...  
Keyword(s):  
Shell Structure ◽  
Template Method ◽  
Core Shell ◽  
Porous Core ◽  
Core Shell Structure

Functional properties of BaTiO3–Ni0.5Zn0.5Fe2O4 magnetoelectric ceramics prepared from powders with core-shell structure

2010 ◽  
Vol 107 (10) ◽  
pp. 104106 ◽  
Author(s):  
L. P. Curecheriu ◽  
M. T. Buscaglia ◽  
V. Buscaglia ◽  
L. Mitoseriu ◽  
P. Postolache ◽  
...  
Keyword(s):  
Functional Properties ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

scholarly journals Ternary ZnO/Co3O4/NiO inherited layered core-shell structure from a double template for high performanced supercapacitor

2021 ◽  
Author(s):  
Linli Zhu ◽  
Chen Hao ◽  
Saisai Zhou ◽  
Xiaohong Wang ◽  
Tiantian Zhou ◽  
...  
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

Composite nanoparticles with titania–poly(N-vinylamide) core–shell structure

2021 ◽  
Vol 31 (1) ◽  
pp. 24-26
Author(s):  
Galina M. Kuz’micheva ◽  
Olesya I. Timaeva ◽  
Irina P. Chikhacheva ◽  
Roman V. Svetogorov ◽  
Ratibor G. Chumakov ◽  
...  
Keyword(s):  
Shell Structure ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Core Shell Structure
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