Covering the optical spectrum through collective rare-earth doping of NaGdF4 nanoparticles: 806 and 980 nm excitation routes

2017 ◽  
Vol 19 (19) ◽  
pp. 11825-11834 ◽  
Author(s):  
A. Skripka ◽  
R. Marin ◽  
A. Benayas ◽  
P. Canton ◽  
E. Hemmer ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Spectrum ◽  
Near Infrared ◽  
Rare Earth Doping ◽  
Rare Earth Doped

Sensitization of numerous emission bands (from ultraviolet to near-infrared) in rare-earth doped multilayered nanoparticles: 806 versus 980 nm excitation.

The optical spectrum of UVLED excitation using NTC nanometer particles to replace rare earth doping

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1895-1904
Author(s):  
Lihong Su ◽  
Kan Chen ◽  
Yongqiang Liu ◽  
ZiAo Zou ◽  
Lihua Su
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Optical Spectrum ◽  
Low Cost ◽  
Rare Earth Ions ◽  
Rare Earth Doping ◽  
Phosphor Material ◽  
Light Emitting ◽  
Luminescence Efficiency ◽  
Nickel Copper

Abstract:Ultraviolet light-emitting diodes (UVLEDs) with phosphor materials have considerable advantages over traditional illumination devices. Doping with rare earth ions can modify the optical spectrum of phosphor materials, but rare earths are very expensive. Thus, replacing rare earths with a common material would provide a great potential for the wide application in the future. In this study, we discovered that a novel type of semiconductor nanometre powder, namely manganese cobalt nickel copper oxide (MCNC), is able to emit blue-green wavelength spectrum when exited by 365-400nmUVLED. In addition, MCNC shows less attenuation of luminescence efficiency than other UVLED phosphor materials doped with rare earths with temperature increase. It is thus concluded that MCNC is a promising low-cost material to replace rare earths to adjust the optical spectrum wavelength of UVLED. This is the first time that nano-scale MCNC is reported to possess the property to change the optical spectrum wavelength of UVLED. This provides a new mechanical and nanometer phosphor material without rare earth doping to shift the wavelength spectrum.

Blue, Green and Red Upconverted Emission of Controlled Hydrothermal Pressure Synthesized Y2O3: Er3+ (1%) Tm3+ (1%) and Different Yb3+ Ratio Conditions Nanophosphors

2019 ◽  
Vol 9 (3) ◽  
pp. 226-231 ◽  
Author(s):  
Solange Ivette Rivera Manrique ◽  
Felipe de Jesús Carrillo Romo ◽  
Antonieta García Murillo ◽  
Carlos Eduardo Rodríguez García ◽  
Jorge Roberto Oliva Uc
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Hydrothermal Method ◽  
Near Infrared ◽  
Initial Pressure ◽  
Sem Images ◽  
Host Matrix ◽  
Chemical Homogeneity ◽  
Co Doping ◽  
Rare Earth Doped

Introduction: Rare earth-doped Upconverting Nanoparticles (UCN's) can convert near-infrared photons into visible photons via multiphoton processes, which makes it a good material for generating white light. The production of luminescent materials for technology applications focuses on controlling powder characteristics such as chemical homogeneity and low impurity levels. Objective: In this research study, we synthesized Er3+ (1%) Tm3+ (1%) Yb3+ (at different percentages) by co-doping Y2O3 NPs, using the Controlled-Pressure Hydrothermal Method (CPHM), with nitrogen. The ratio used was chosen to conduct a detailed photolumniscence analysis. Methods: Samples of Y2O3: Er3+ (1%) Tm3+ (1%) Yb3+ (at 1.5%, 2%, and 2.5%) were prepared using the controlled-pressure hydrothermal method (CPHM). Each solution was transferred into a mini-clave drive Büchiglasuster with an inner Teflon vessel. In this case, the mini-clave was heated at 190°C for 3 h, and nitrogen was used to control the pressure. The initial pressure was 20 bars; it was increased during the process to 42 bars. The powders obtained were washed with distilled water using centrifugation at 4000 rpm for 15 min. The washed product was dried to 120°C, followed by subsequent heat treatment at 1000°C for 5 h. Results: The representative XRD patterns for the Y2O3: Er3+ (1%) Tm3+ (1%) and Yb3+ (at 1.5%, 2%, 2.5%) doped samples confirms the presence of a cubic Y2O3 crystal structure. Scanning Electron Microscope (SEM) images show that the morphology of these particles is spherical. Upconversion photoluminescence spectra of Y2O3:Er3+ (1% mol) Tm3+ (1% mol) Yb3+ (1.5% mol), Yb3+ (2.0% mol), and Yb3+ (2.5% mol), after 908-nm excitation. Blue, green, and red bands are centred at 440 nm, 469 nm, 618 nm, and 678 nm, respectively. Conclusion: The controlled-pressure hydrothermal method is a productive method for synthesizing rare earth-doped and codoped Y2O3; when Er3+, Yb3+, and Tm3+ ions are introduced into the host matrix, they do not cause any changes in the cubic structure nor influence the crystal structure. This method can used to synthesize any type of nanoparticle, because it involves low pressure (10-20 bars), low temperatures, and short time reactions.

Near-infrared (1550 nm) in vivo bioimaging based on rare-earth doped ceramic nanophosphors modified with PEG-b-poly(4-vinylbenzylphosphonate)

Nanoscale ◽  
2011 ◽  
Vol 3 (9) ◽  
pp. 3705 ◽  
Author(s):  
Masao Kamimura ◽  
Naoki Kanayama ◽  
Kimikazu Tokuzen ◽  
Kohei Soga ◽  
Yukio Nagasaki
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
Rare Earth Doped

Rare-Earth-Doped Pt/Ba/Ce0.6Zr0.4O2-Al2O3for NOxStorage and Reduction: The Effect of Rare-Earth Doping on Efficiency and Stability

ChemCatChem ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 237-244 ◽  
Author(s):  
Xiuyun Wang ◽  
Zhilin Chen ◽  
Yuling Wang ◽  
Ruihu Wang
Keyword(s):  
Rare Earth ◽  
Rare Earth Doping ◽  
Rare Earth Doped

High Affinity to Skeleton Rare Earth Doped Nanoparticles for Near-Infrared II Imaging

Nano Letters ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 2985-2992 ◽  
Author(s):  
Shuqing He ◽  
Si Chen ◽  
Daifeng Li ◽  
Yifan Wu ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
High Affinity ◽  
Rare Earth Doped

Synergistic strategy of rare-earth doped nanoparticles for NIR-II biomedical imaging

2021 ◽  
Author(s):  
Xiao Zhang ◽  
Shuqing He ◽  
Bingbing Ding ◽  
Chunrong Qu ◽  
Hao Chen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fluorescence Imaging ◽  
Biomedical Imaging ◽  
Near Infrared ◽  
Multiple Targets ◽  
Multicolor Imaging ◽  
Promising Application ◽  
Rare Earth Doped

Featured with simultaneous multicolor imaging for multiple targets, synergistic strategy has been a promising application for fluorescence imaging. The visible and the first near infrared (NIR-I, 700-900 nm) fluorophores have...

Rare earth doped Si-rich ZnO for multiband near-infrared light emitting devices

2012 ◽  
Vol 101 (19) ◽  
pp. 191115 ◽  
Author(s):  
Emanuele Francesco Pecora ◽  
Thomas I. Murphy ◽  
Luca Dal Negro
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Rare Earth Doped
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