On enhancement and control of green emission of rare earth co-doped hydroxyapatite nanoparticles: synthesis and upconversion luminescence properties

2021 ◽  
Author(s):  
Hoang Nhu Van ◽  
Tu Le Manh ◽  
Dung Do Thi Thuy ◽  
Vuong-Hung Pham ◽  
Duy-Hung Nguyen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Upconversion Luminescence ◽  
Green Emission ◽  
Luminescence Properties ◽  
Hydroxyapatite Nanoparticles ◽  
Nanoparticles Synthesis ◽  
And Control ◽  
Co Doped

In this work, low-temperature hydrothermal synthesis of a series of xMo–1%Er–10%Yb (x:mol%) doped hydroxyapatite (HA) phosphors was studied.

Hydrothermal Synthesis and Upconversion Properties of Yb3+, Tm3+ Co-Doped Gd6MoO12 Phosphor with Regular Morphologies

2014 ◽  
Vol 597 ◽  
pp. 109-112
Author(s):  
Jia Yue Sun ◽  
Bing Xue ◽  
Qiu Mei Di ◽  
Qi Guang Xu ◽  
Liu Han
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Ph Value ◽  
Upconversion Luminescence ◽  
Synthesis Condition ◽  
Luminescence Properties ◽  
Pumping Power ◽  
Co Doped

Yb3+, Tm3+ co-doped Gd6MoO12 phosphors were prepared by the hydrothermal method. After tuning the PH value and EDTA, phosphors present different morphologies including hexagonal prisms, spindles, and spheres. Under 980nm excitation, the upconversion luminescence properties of the as-prepared phosphors are studied based on changing the synthesis condition. It is found that usage of EDTA and pH changing both play crucial key in the formation of morphology. Pumping power on the UC luminescence properties and level diagram mechanism of Gd6MoO12:Yb3+/Tm3+phosphor have also been discussed.

Controllable hydrothermal synthesis of Eu3+/Tb3+/Dy3+ activated Zn8[(BO3)3O2(OH)3] micro/nanostructured phosphors: energy transfer and tunable emissions

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89113-89123 ◽  
Author(s):  
P. Liang ◽  
J. W. Liu ◽  
Z. H. Liu
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Hydrothermal Synthesis ◽  
Luminescence Properties ◽  
Rare Earth Doped ◽  
Co Doped

When Eu3+ and Tb3+ ions are co-doped into the ZBH matrix, the phosphor yielded tunable emissions. The concentration of rare earth doped can change the composition and further change the morphology and the luminescence properties.

Controlled synthesis and upconversion luminescence properties of heterogeneous isomorphism Yb3+/Er3+ co-doped Na0.9Ca0.9Gd1.1F6 nanorods with multiple luminescence centers

CrystEngComm ◽  
2021 ◽  
Author(s):  
Ruijun Tang ◽  
Jianxun Wang ◽  
Yueshan Xu ◽  
Shasha Wang ◽  
Gejihu De
Keyword(s):  
Rare Earth ◽  
Upconversion Luminescence ◽  
Luminescence Properties ◽  
Controlled Synthesis ◽  
Luminescence Centers ◽  
Luminescence Efficiency ◽  
Co Doped ◽  
Biomedical Fields ◽  
Luminescent Nanocrystals

Rare-earth upconversion luminescent nanocrystals (UCLNCs) have limited their application in biomedical fields due to their low luminescence efficiency. Here, heterogeneous isomorphism Na0.9Ca0.9Gd1.1F6:Yb3+/Er3+ nanorods are successfully obtained using a mild solvothermal...

Upconversion Luminescence Properties of Ho3+, Tm3+, Yb3+ Co-Doped Nanocrystal NaYF4 Synthesized by Hydrothermal Method

2006 ◽  
Vol 24 (6) ◽  
pp. 757-760 ◽  
Author(s):  
Yang Kuisheng ◽  
Li Yan ◽  
Yu Chaoyi ◽  
Lu Liping ◽  
Ye Chanhua ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Upconversion Luminescence ◽  
Luminescence Properties ◽  
Co Doped

Structure and Up-Conversion Luminescence Properties of Er3+-Yb3+Co-Doped TiO2 Nanocrystals Prepared by Sol-Gel Method

2009 ◽  
Vol 66 ◽  
pp. 167-170 ◽  
Author(s):  
Zhen Zhong Zhang ◽  
Ji Hong Zhang ◽  
Wei Zhou ◽  
Ming Xia Song ◽  
Wei Li ◽  
...  
Keyword(s):  
Titanium Tetrachloride ◽  
Upconversion Luminescence ◽  
Sol Gel ◽  
Green Emission ◽  
X Ray Diffraction ◽  
Red Emission ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Co Doped

Er3+/Yb3+ co-doped TiO2 nanocrystals were prepared by Sol-gel method in which titanium tetrachloride was adopted as the precursor. The structure, particle size, and optical properties of samples were characterized by X-ray diffraction(XRD), Field emission-Scanning Electron Microscopy(FE-SEM) and photoluminescence(PL) spectra. Er3+ concentration was fixed at 1.0mol%, and Yb3+ concentration was changed from 3 to 10mol%. Intense upconversion luminescence was observed when the samples were excited by 980nm laser. The dependence of upconversion luminescence on Yb3+ concentration was presented. The results show that the upconversion luminescence increases with the Yb3+ concentration and gets its peak at 5%. The ratio of red emission to green emission(R/G) was strikingly enhanced with the increase of Yb3+ concentration. Under the excitation of 980nm, the green emission in the range of 520-570nm (2H11/2, 4S3/2→4I15/2) and the red emission in the range of 640~690nm (4F9/2 →4I15/2) are both due to two photons process. The possible upconversion mechanism was discussed.

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