Preparation and the PL Properties of Er3+ - Ce3+ Co-Doped TiO2 Powders

2014 ◽  
Vol 528 ◽  
pp. 30-33
Author(s):  
Ling Yun Bai ◽  
Long Fa Jiang ◽  
Jun Huai Xiang
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Hybrid Matrix ◽  
Peak Intensity ◽  
Dispersion Effects ◽  
Co Doped

The 0.5-3.0 mol% Er3+-Ce3+ co-doped TiO2 powders have been prepared by sintering the hybrid materials Er0.5Ce0.5(AA)3phen-doped TiO2/PMMA, which were prepared by sol-gel method, using the modified titanium (IV) n-butoxide [Ti(O-Bu)4-x(AAPhen)x] as precursors which were given by the chelate reaction between Ti(O-Bu)4, AA and Phen at 70°C. The hybrid matrix TiO2/PMMA improved the dispersion of Er3+, which caused an enhancement in the photoluminescence (PL) peak intensity at 1.53 mm of the 1 mol% Er (AA)3phen-doped TiO2/PMMA powders sintered at 700 °C of about 23 times higher than that only had TiO2 as its matrix. When co-doped with Ce3+, the above ratio of the PL peak intensity was raised to 75 times, which illustrated the obvious sensitization and dispersion effects of Ce3+ on Er3+.

Fabrication of F–Nb co-doped transparent conducting TiO2 films using the sol-gel method

2021 ◽  
Vol 126 ◽  
pp. 105675
Author(s):  
Yang Ren ◽  
Haiyan He ◽  
Yunwei Wang ◽  
Ying Gong ◽  
Gaoyang Zhao
Keyword(s):  
Sol Gel ◽  
Tio2 Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transparent Conducting ◽  
Co Doped

Eu3+-Doped Y3−xNdxAl3O12 garnet: synthesis and structural investigation

2017 ◽  
Vol 19 (5) ◽  
pp. 3729-3737 ◽  
Author(s):  
L. Pavasaryte ◽  
A. Katelnikovas ◽  
V. Klimavicius ◽  
V. Balevicius ◽  
A. Krajnc ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Structural Investigation ◽  
Sol Gel ◽  
Environmentally Friendly ◽  
Yttrium Aluminium Garnet ◽  
Gel Method ◽  
Sol Gel Method ◽  
Yttrium Aluminium ◽  
Co Doped

Nd3+-doped yttrium aluminium garnet and Eu3+–Nd3+-co-Doped yttrium aluminium garnet were synthesized using an environmentally friendly sol–gel method at low temperatures.

Enhanced room temperature ferromagnetism in Cr and Fe co-doped SnO2 nanoparticles synthesized by sol-gel method

Vacuum ◽  
2020 ◽  
Vol 181 ◽  
pp. 109635 ◽  
Author(s):  
Monika Duhan ◽  
Naveen Kumar ◽  
Anita Gupta ◽  
Anupinder Singh ◽  
Harminder Kaur
Keyword(s):  
Room Temperature ◽  
Sno2 Nanoparticles ◽  
Room Temperature Ferromagnetism ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
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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