Enhanced deep-red emission from Mn4+/Mg2+ co-doped CaGdAlO4 phosphors for plant cultivation

2019 ◽  
Vol 48 (7) ◽  
pp. 2455-2466 ◽  
Author(s):  
Jianxu Hu ◽  
Tinghong Huang ◽  
Yuanpeng Zhang ◽  
Bin Lu ◽  
Huanqing Ye ◽  
...  
Keyword(s):  
Red Emission ◽  
Plant Cultivation ◽  
Peak Intensity ◽  
Co Doped

Deep-red emission with a peak intensity at 712 nm is observed from the Mn4+/Mg2+ co-doped CaGdAlO4 phosphor for plant cultivation.

Ab Initio Site Occupancy and Far-Red Emission of Mn4+in Cubic-Phase La(MgTi)1/2O3for Plant Cultivation

2017 ◽  
Vol 9 (7) ◽  
pp. 6177-6185 ◽  
Author(s):  
Ziwei Zhou ◽  
Jiming Zheng ◽  
Rui Shi ◽  
Niumiao Zhang ◽  
Jiayu Chen ◽  
...  
Keyword(s):  
Ab Initio ◽  
Site Occupancy ◽  
Cubic Phase ◽  
Red Emission ◽  
Plant Cultivation

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.

Near-UV light excited Eu3+, Tb3+, Bi3+ co-doped LaPO4 phosphors: Synthesis and enhancement of red emission for WLEDs

2015 ◽  
Vol 41 (4) ◽  
pp. 5525-5530 ◽  
Author(s):  
Yao Xia ◽  
Yingheng Huang ◽  
Qiwei Long ◽  
Sen Liao ◽  
Yong Gao ◽  
...  
Keyword(s):  
Uv Light ◽  
Red Emission ◽  
Co Doped

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+.

Composition-Dependent Ultraviolet up-Conversion Luminescence in Yb3+-Ho3+ Co-Doped Germanium- Phosphate Glasses

2011 ◽  
Vol 266 ◽  
pp. 5-8 ◽  
Author(s):  
Yan Min Yang ◽  
Wei Zhang ◽  
Shan Du ◽  
Zhi Ping Yang
Keyword(s):  
Emission Intensity ◽  
Glass Sample ◽  
Green Emission ◽  
Phosphate Glasses ◽  
Ultraviolet Emission ◽  
Red Emission ◽  
Excitation Mechanisms ◽  
Uv Visible ◽  
Holmium Ion ◽  
Co Doped

Yb3+-Ho3+ co-doped germanium-phosphate glasses have been prepared and characterized for its optical properties through measuring photoluminescence and Raman spectra. UV-visible up-conversion emission of holmium ion in Yb3+-Ho3+ co-doped germanium-phosphate glasses has been observed on 980nm excitation. As phosphate was substituted for germanium the red emission Red I decreased at first and then increased later while the green emission Green I decreased and the ratio of Red I to Green I increased. Interestingly, the value of ultraviolet emission intensity was larger than that of the blue and green emission intensity in phosphate glass sample. We believe that Yb3+-Ho3+ co-doped germanium-phosphate glasses might be a potential host material for developing ultraviolet all–solid compact lasers. The possible excitation mechanisms involved in these emissions were discussed, too.

The structure, photoluminescence and influence of temperature on energy transfer in co-doped Ca9La(GeO4)0.75(PO4)6 red-emission phosphors

2015 ◽  
Vol 44 (19) ◽  
pp. 9241-9250 ◽  
Author(s):  
Wenjin Xu ◽  
Ge Zhu ◽  
Xufeng Zhou ◽  
Yuhua Wang
Keyword(s):  
Energy Transfer ◽  
Red Emission ◽  
Influence Of Temperature ◽  
The Family ◽  
Influence Of Temperature On ◽  
Co Doped

A novel phosphate Ca9La(GeO4)0.75(PO4)6 was investigated to add to the family of phosphate phosphors and application in LEDs.

Blue Upconversion Luminescence from Phosphor Tm3+/Yb3+ Co-Doped Gd2Mo3O9

2013 ◽  
Vol 683 ◽  
pp. 3-6
Author(s):  
Jia Yue Sun ◽  
Bing Xue ◽  
Guang Chao Sun ◽  
Dian Peng Cui ◽  
Hai Yan Du
Keyword(s):  
Solid State ◽  
Upconversion Luminescence ◽  
Blue Emission ◽  
Solid State Reaction Method ◽  
Solid State Lighting ◽  
Red Emission ◽  
Reaction Method ◽  
X Ray ◽  
Strong Blue Emission ◽  
Co Doped

The upconversion (UC) luminescence properties of phosphor Tm3+/Yb3+co-doped Gd2Mo3O9were investigated in detail. Tm3+/Yb3+co-doped Gd2Mo3O9was prepared by solid-state reaction method using Na2CO3as flux and characterized by powder X-ray diffractometry. Under 980nm excitation, Tm3+/Yb3+co-doped Gd2Mo3O9has exhibited a weak red emission near 651nm and strong blue emission at 476nm. Tm3+/Yb3+co-doped Gd2Mo3O9phosphor has been considered as a better candidate in solid-state lighting applications.

Single red emission from upconverting ZnGa2O4:Yb,Er nanoparticles co-doped by Cr3+

2020 ◽  
Vol 8 (19) ◽  
pp. 6370-6379 ◽  
Author(s):  
Bhupendra B. Srivastava ◽  
Santosh K. Gupta ◽  
Yuanbing Mao
Keyword(s):  
Hydrothermal Method ◽  
Near Infrared ◽  
Red Light ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Red Emission ◽  
Co Doped

ZnGa2O4:Yb3+,Er3+,Cr3+ nanoparticles synthesized by a hydrothermal method and further annealing emit bright singular red light under 980 nm excitation and near-infrared light under 254 nm excitation.

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