Color-tunable and single-band red upconversion luminescence from rare-earth doped Vernier phase ytterbium oxyfluoride nanoparticles

2016 ◽  
Vol 4 (4) ◽  
pp. 684-690 ◽  
Author(s):  
Ting Wen ◽  
Yannan Zhou ◽  
Yanzhen Guo ◽  
Chunmei Zhao ◽  
Baocheng Yang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Upconversion Luminescence ◽  
Single Band ◽  
Color Tunable ◽  
Rare Earth Doped

Vernier phase YbOF nanoparticles fabricated via a low temperature fluorination route show color-tunable and single-band red upconversion luminescence.

Low temperature microwave study of photoconductivity in rare-earth-doped dielectric crystals

2006 ◽  
Vol 28 (1-2) ◽  
pp. 35-40 ◽  
Author(s):  
M.-F. Joubert ◽  
S.A. Kazanskii ◽  
Y. Guyot ◽  
H. Loudyi ◽  
J.-C. Gâcon ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Rare Earth Doped

Fabrication of Yb:YAG Transparent Ceramics Using Stearate Melting Derived Ultrafine Powders

2014 ◽  
Vol 602-603 ◽  
pp. 242-247
Author(s):  
Jin Sheng Li ◽  
Xu Dong Sun ◽  
Shao Hong Liu ◽  
Di Huo ◽  
Xiao Dong Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Phase Formation ◽  
Ultrafine Particles ◽  
Transparent Ceramics ◽  
Ultrafine Powders ◽  
Vacuum Sintering ◽  
Melting Method ◽  
Uniform Microstructure ◽  
Rare Earth Doped

Yb rare earth doped YAG ultrafine particles were synthesized by the stearate melting method using yttrium stearate, ytterbium stearate and aluminum tristearate as starting materials. The phase formation of Yb:YAG, the properties and the sintering activity of the powders were investigated by means of XRD, SEM, dilatometry and vacuum sintering. The results show that pure Yb:YAG nanopowders can be obtained by calcining the co-melted precursor at a relatively low temperature of 800 °C for 4 h. The powders calcined at 1000°C have better sintering activity than the powders calcined at other temperatures. For the Yb:YAG powders doping with 0.5% TEOS, the compact can be sintered to 99.2% of the theoretical density at 1600 °C and 99.7% at 1700 °C. The transparent Yb:YAG ceramics obtained by vacuum sintering at 1700 °C for 5 h exhibit a pore-free and uniform microstructure.

scholarly journals Modulation of upconversion luminescence spectrum of single rare-earth-doped upconversion nanocrystal based on plasmonic nanocavity

2022 ◽  
Vol 71 (2) ◽  
pp. 027801-027801
Author(s):  
Meng Yong-Jun ◽  
◽  
Li Hong ◽  
Tang Jian-Wei ◽  
Chen Xue-Wen
Keyword(s):  
Rare Earth ◽  
Luminescence Spectrum ◽  
Upconversion Luminescence ◽  
Rare Earth Doped

Low-temperature processed rare-earth doped brookite TiO2 scaffold for UV stable, hysteresis-free and high-performance perovskite solar cells

Nano Energy ◽  
2020 ◽  
Vol 77 ◽  
pp. 105183
Author(s):  
Qiyao Guo ◽  
Jihuai Wu ◽  
Yuqian Yang ◽  
Xuping Liu ◽  
Weihai Sun ◽  
...  
Keyword(s):  
Solar Cells ◽  
Rare Earth ◽  
Low Temperature ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Rare Earth Doped

Discovery of non-reversible thermally enhanced upconversion luminescence behavior in rare-earth doped nanoparticles

2019 ◽  
Vol 7 (15) ◽  
pp. 4336-4343 ◽  
Author(s):  
Denghao Li ◽  
Weirong Wang ◽  
Xiaofeng Liu ◽  
Chun Jiang ◽  
Jianrong Qiu
Keyword(s):  
Rare Earth ◽  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Thermally Activated ◽  
Rare Earth Doped ◽  
Luminescence Behavior

Volatilization of surface moieties and sintering of the particles both contribute to thermally activated enhancement of upconversion emission.

CO2 methanation over rare earth doped Ni based mesoporous catalysts with intensified low-temperature activity

2017 ◽  
Vol 42 (23) ◽  
pp. 15523-15539 ◽  
Author(s):  
Leilei Xu ◽  
Fagen Wang ◽  
Mindong Chen ◽  
Dongyang Nie ◽  
Xinbo Lian ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Co2 Methanation ◽  
Mesoporous Catalysts ◽  
Rare Earth Doped

scholarly journals CO2 Methanation over Rare Earth Doped Ni-Based Mesoporous Ce0.8Zr0.2O2 with Enhanced Low-Temperature Activity

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 463
Author(s):  
Zhenglong Yang ◽  
Yan Cui ◽  
Pengxiang Ge ◽  
Mindong Chen ◽  
Leilei Xu
Keyword(s):  
Solid Solution ◽  
Rare Earth ◽  
Low Temperature ◽  
Impregnation Method ◽  
Co2 Methanation ◽  
X Ray ◽  
Wide Range ◽  
Temperature Programmed ◽  
Rare Earth Doped ◽  
The Rare Earth

The Ni-based catalysts have a wide range of industrial applications due to its low cost, but its activity of CO2 methanation is not comparable to that of precious metal catalysts. In order to solve this problem, Ni-based mesoporous Ce0.8Zr0.2O2 solid solution catalysts doped with rare earth were prepared by the incipient impregnation method and directly used as catalysts for the methanation of CO2. The catalysts were characterized systematically by x-ray powder diffraction (XRD), N2 physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, x-ray photoelectron spectroscopy (XPS), H2 temperature programmed reduction (H2-TPR), CO2 temperature programmed desorption (CO2-TPD), and so on. The results show that Ni is highly dispersed in the mesoporous skeleton, forming a strong metal–skeleton interaction. Therefore, under the condition of CO2 methanation, the hot sintering of metallic Ni nanoparticles can be effectively inhibited so that these mesoporous catalysts have good stability without obvious deactivation. The rare earth doping can significantly increase the surface alkalinity of catalyst and enhance the chemisorption of CO2. In addition, the rare earth elements also act as electron modifiers to help activate CO2 molecules. Therefore, the rare earth doped Ni-based mesoporous Ce0.8Zr0.2O2 solid solution catalysts are expected to be an efficient catalyst for the methanation of CO2 at low-temperature.

Synthesis and Research of rare earth-doped color tunable Sr3Gd(PO4)3 phosphors

2019 ◽  
Vol 33 (18) ◽  
pp. 1950201
Author(s):  
Boxin Liang ◽  
Shuangping Yi ◽  
Gengqiao Hu ◽  
Zhixiong Fang ◽  
Zhengfa Hu
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Dipole Interaction ◽  
Critical Distance ◽  
Solid State Method ◽  
Excitation Peak ◽  
Good Thermal Stability ◽  
Emission Color ◽  
Color Tunable ◽  
Rare Earth Doped

Rare earth-doped Sr3Gd(PO4)3 and emission color tunable phosphors Ce[Formula: see text]/Sm[Formula: see text] co-doped Sr3Gd(PO4)3 have been synthesized by a traditional solid-state method. These phosphors were characterized by X-ray diffraction (XRD), FE-SEM, diffuse reflectance spectra (DRS), photoluminescence spectra and lifetime measurements. The quenching concentration of Ce[Formula: see text] ions in Sr3Gd(PO4)3 was about 9 mol.%. An effective energy transfer (ET) from Ce[Formula: see text] ions to Sm[Formula: see text] ions in Sr3Gd(PO4)3 was speculated by the overlapped spectrum for the emission peak of Ce[Formula: see text] and the excitation peak of Sm[Formula: see text] ions. It is demonstrated that the ET mechanism is resonant through the dipole–dipole interaction and the critical distance between Ce[Formula: see text] and Sm[Formula: see text] in Sr3Gd(PO[Formula: see text] is calculated to 15.22 Å. Moreover, Sr3Gd[Formula: see text](PO4)3:0.09Ce[Formula: see text], xSm[Formula: see text] can be adjusted systematically by generating blue light to white light in the CIE diagram which coincide with the ET process of Ce[Formula: see text] ions to Sm[Formula: see text] ions. The Sr3Gd[Formula: see text](PO4)3:0.09Ce[Formula: see text], 0.01Sm[Formula: see text] phosphor also perform at a good thermal stability. All of these experimental results in this work can be served as a potential multicolor tunable phosphor for ultraviolet pumped white light appliance.

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