scholarly journals Er-Doped Nanostructured BaTiO3 for NIR to Visible Upconversion

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1950 ◽  
Author(s):  
Ariel Meneses-Franco ◽  
Marcelo Campos-Vallette ◽  
Sergio Vásquez ◽  
Eduardo Soto-Bustamante
Keyword(s):  
Emission Spectroscopy ◽  
Lattice Structure ◽  
Sol Gel ◽  
Site Location ◽  
Erbium Ions ◽  
Erbium Doped ◽  
Doping Mechanism ◽  
Doped Barium Titanate ◽  
Er Doped ◽  
Upconversion Emissions

Photoluminescent mechanisms in erbium-doped barium titanate nanoparticle systems were studied. Er3+ ions were introduced into the BaTiO3 lattice by the sol-gel method. The resulting Er3+ concentration was between 0% and 5%, with Ba/Ti ratios of 1.008 and 0.993. The stoichiometry of Ba and Ti concentrations in the lattice influenced the doping mechanism and placement of erbium ions in the lattice structure. Our research shows the existence of a strong correlation between Ba/Ti ratios, erbium concentration, phase structure and doping site location on the upconversion photoluminescence mechanisms. Competing upconversion emissions 2H11/2/4S3/2→4I15/2 at 523 and 548 nm respectively and other photoluminescent mechanisms as 4I9/2→4I11/2 around 4000 nm (2500 cm−1) were studied using Raman and emission spectroscopy. The upconversion process is predominant over other photoluminescent decay when the material presents high distortion in the surrounding activator.

Sol–gel synthesis of erbium-doped ZnO with nest structure for photocatalysis

2018 ◽  
Vol 11 (01) ◽  
pp. 1750082 ◽  
Author(s):  
Chun Li ◽  
Zuoyun Yan ◽  
Yuan Zhou ◽  
Shuang Zhao ◽  
Xiaotao Zhang ◽  
...  
Keyword(s):  
Uv Light ◽  
Sol Gel ◽  
Kinetic Studies ◽  
Bandgap Energy ◽  
Nest Structure ◽  
Er Doping ◽  
Erbium Doped ◽  
Doped Zno ◽  
Er Doped ◽  
Sol Gel Synthesis

Rare earth erbium-doped ZnO samples were synthesized via a facile sol–gel method. The influences of Er-doping on structural properties, morphological features and optical properties were characterized by XRD, BET, SEM and UV–Vis DRS techniques. The results showed that the as-synthesized products were well crystallined in the absence of impurity phases and Er-doping resulted in the reduction of bandgap energy deducted from the UV–Vis DRS results. Amongst the samples, layer-like 0.5% Er-doped ZnO with nest structure achieved the highest photodegradation (90.7%) of methylene blue (MB) after UV light irradiation for 2[Formula: see text]h. The kinetic studies of MB degradation over different Er-doped ZnO were also conducted and proved to obey the pseudo-first-order kinetics.

scholarly journals Erbium upconversion luminescence from sol–gel derived multilayer porous inorganic perovskite film

2022 ◽  
Author(s):  
M. V. Rudenko ◽  
N. V. Gaponenko ◽  
E. B. Chubenko ◽  
E. I. Lashkovskaya ◽  
K. V. Shustsikava ◽  
...  
Keyword(s):  
Room Temperature ◽  
Upconversion Luminescence ◽  
Sol Gel ◽  
Perovskite Solar Cells ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
X Ray ◽  
Erbium Doped ◽  
Doped Barium Titanate

Erbium-doped barium titanate (BaTiO3:Er) xerogel film with a thickness of about 500 nm was formed on the porous strontium titanate (SrTiO[Formula: see text] xerogel film on Si substrate after annealing at 800[Formula: see text]C or 900[Formula: see text]C. The elaborated structures show room temperature upconversion luminescence under 980 nm excitation with the photoluminescence (PL) bands at 523, 546, 658, 800 and 830 nm corresponding to 2H[Formula: see text]4I[Formula: see text], 4S[Formula: see text]I[Formula: see text], 4F[Formula: see text]I[Formula: see text] and 4I[Formula: see text]4I[Formula: see text] transitions of trivalent erbium. Raman and X-ray diffraction (XRD) analysis of BaTiO3:Er\porous SrTiO3\Si structure showed the presence of perovskite phases. Its excellent up-conversion optical performance will greatly broaden its applications in perovskite solar cells and high-end anti-counterfeiting technologies.

Optical Characteristics of Erbium-Doped SiO2/PVA Electrospun Nanofibers

2015 ◽  
Vol 1108 ◽  
pp. 59-66
Author(s):  
M. Kamil Abd-Rahman ◽  
N.F.M. Suhaimi ◽  
Evy Evana Edwin ◽  
Winnie Dian ◽  
Nur Hanis Abdul Halim
Keyword(s):  
Silica Glass ◽  
Sol Gel ◽  
Electrospun Nanofibers ◽  
Fused Silica ◽  
Optical Characteristics ◽  
Glass Substrates ◽  
Erbium Doped ◽  
Pva Solutions ◽  
Er Doped ◽  
Fused Silica Glass

This paper reports on the fabrication and optical characteristics of erbium-doped silica/PVA nanofibers via sol gel and electrospinning techniques. Silica glass, PVA (polyvinyl alcohol) and SiO2/PVA composites displayed 85% to 90% transparent across 300 2000 nm wavelength range. The transmission spectra were measured using Cary 5000 UV-Vis-NIR spectrophotometer. Silica was synthesized using TEOS (tetraethylorthosilicate) as the precursor, while PVA solution comprised of 7.0 wt% in H2O. The compositional ratios of SiO2:PVA were from 6:4 to 1:9 and were doped with 0.2% to 0.6% of erbium. Suitable viscosities of Er3+-doped SiO2:PVA solutions were electrospun into mesh of long strands nanofibers. Morphological and material compositions in the nanofibers were analysed using FESEM (field-emission scanning electron microscopy) and EDX (energy-dispersive X-ray spectroscopy). Er3+-doped SiO2:PVA thin films were coated on fused-silica glass substrates via spin coating and were characterized for their refractive indices, optical transmission, and fluorescence using M-line technique, UV-Vis-NIR spectrometer and photoluminescence spectrophotometer, respectively. Lower ratios of silica to PVA solutions results in higher viscosities and produced more uniform nanofiber structures of diameters around 100 nm with lesser beads. The refractive index of 1.61 for Er-doped SiO2:PVA (1:9) thin film was measured with TE polarized 632.8 nm wavelength laser and the index shows to be higher for more content of PVA in the glass/polymer composites. The 0.4% of Er3+ in SiO2:PVA composite produced the highest luminescence intensity at 605 nm when excited with 514 nm source. Higher doping content caused ion clustering effect and leads to concentration quenching, hence decreased in the emission intensity.

scholarly journals Tin Dioxide Nanocrystals as an Effective Sensitizer for Erbium Ions in Er-Doped SnO2Systems for Photonic Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Tran T. T. Van ◽  
Nguyen Truc Ly ◽  
Le T. T. Giang ◽  
Cao Thi My Dung
Keyword(s):  
Tin Oxide ◽  
Doping Concentration ◽  
Tin Dioxide ◽  
Precipitation Method ◽  
Doping Content ◽  
Erbium Ions ◽  
Heat Treated ◽  
Erbium Doped ◽  
Average Size ◽  
Er Doped

Undoped SnO2and erbium-doped SnO2powders were successfully prepared by precipitation method. The effect of the heat treatment and doping contents on the structure of tin oxide and optical properties was also studied. The XRD data and Raman spectra indicate that the SnO2crystals have formed after being heat-treated at 400°C and the average size of grains is about 8 nm for doping content of 1 mol%. An increase of doping concentration has controlled the growth of nanocrystals. The principle of the visible and infrared emissions of SnO2and SnO2:Er is also discussed. All photoluminescence study shows that the Er3+ions can be located in SnO2nanocrystals and that there is energy transfer from defect levels of SnO2nanoparticles to neighboring Er3+ions of crystals.

scholarly journals Amplifying characteristics Er-doped chalcogenide glass

2010 ◽  
Vol 64 (3) ◽  
pp. 183-186
Author(s):  
Vesna Petrovic ◽  
Nikola Stojanovic ◽  
Milos Slankamenac ◽  
Svetlana Lukic
Keyword(s):  
Chalcogenide Glasses ◽  
Laser Source ◽  
Source Power ◽  
Erbium Ions ◽  
Fluorescence Maximum ◽  
Useful Signal ◽  
Erbium Doped ◽  
Measurement Results ◽  
Er Doped ◽  
Doped Glass

The paper presents the measurement results of optical amplifying characteristics of Er-doped As-S-Ge chalcogenide glasses. The measurements included the amplification of useful laser source power during propagation along two axes of samples. A fluorescence maximum at the wavelengths between 1500 nm and 1540 nm was identified, which corresponds to the transition of electrons from the 4I13/2 level to the 4I15/2 level within the 4f shell of Erbium ions (Er3+). Measuring the signal strength showed that the passage through the erbium doped chalcogenid glass amplification of the useful signal occurs and this increase is proportional to the length of propagation through the doped glass.

Exploring the characteristics of the nickel oxide nanoparticles via Sol - gel method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jothi M ◽  
Sowmiya K
Keyword(s):  
Nickel Oxide ◽  
Ph Value ◽  
Lattice Structure ◽  
Sol Gel ◽  
Systematic Change ◽  
Average Crystalline Size ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy

Nickel Oxide (NiO) is an important transition metal oxide with cubic lattice structure. NiO is thermally stable that is suitable for tremendous applications in the field of optic, ceramic,glass, electro-chromic coatings, plastics, textiles, nanowires, nanofibers, electronics,energy technology, bio-medicine, magnetism and so on. In this present study, NiO nanoparticles were successfully synthesized by sol-gel technique. Nano-sols were prepared by dissolving Nickel-Chloride [NiCl2.6H2O] in NaOH solvent and were converted into nano structured gel on precipitation. A systematic change in preparation parameters like calcination temperature, time, pH value has been noticed in order to predict the influence on crystallite size. Then the prepared samples were characterized by the X-ray Diffraction Spectroscopic (XRD), UV-VIS Spectroscopy, Fourier Transform Infra-Red Spectroscopy (FTIR), Energy Dispersive X-ray Spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Particle Size Analyzer (PSA). From XRD, the average crystalline-size has been calculated by Debye-Scherrer Equation and it was found to be 12.17 nm and the band gap energy of Nickel oxide (NiO) from UV studies reveals around 3.85 eV. Further, EDX and FTIR studies, confirm the presences of NiO nanoparticles. The SEM study exhibits the spherical like morphology of Nickel oxide (NiO). Further from PSA, the mean value of NiO nanoparticles has been determined.

Investigation on the fluorescence properties of Er-doped sol-gel silica glasses

2003 ◽  
Author(s):  
Yigang Li ◽  
Liying Liu ◽  
Zhanjia Hou ◽  
Lei Xu ◽  
Wencheng Wang
Keyword(s):  
Sol Gel ◽  
Fluorescence Properties ◽  
Silica Glasses ◽  
Er Doped

scholarly journals Effect of the Matrix on the 1.5μm Photoluminescence of Er-Doped Silicon Quantum Dots

2006 ◽  
Vol 514-516 ◽  
pp. 1116-1120 ◽  
Author(s):  
M.Fátima Cerqueira ◽  
Margarita Stepikhova ◽  
Maria Losurdo ◽  
Teresa Monteiro ◽  
Manuel J. Soares ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Nanocrystalline Silicon ◽  
Raman Spectroscopic ◽  
Silicon Thin Films ◽  
Erbium Ions ◽  
Deposition Parameters ◽  
Composition And Structure ◽  
The Matrix ◽  
Er Doped ◽  
The Impact

Erbium doped nanocrystalline silicon thin films were produced by reactive magnetron r.f. sputtering. Their structural and chemical properties were studied by micro-Raman, spectroscopic ellipsometry and Rutherford backscattering spectroscopy. Films with different crystalline fraction and crystallite size were deposited by changing the deposition parameters. The impact of the composition and structure of Erbium ions environment on the 1.5 µm photoluminescence is discussed.

High-power microcavity lasers based on highly erbium-doped sol–gel aluminosilicate glasses

2006 ◽  
Vol 131 (1-3) ◽  
pp. 27-31 ◽  
Author(s):  
Le Ngoc Chung ◽  
Chu Thi Thu Ha ◽  
Nguyen Thu Trang ◽  
Pham Thu Nga ◽  
Pham Van Hoi ◽  
...  
Keyword(s):  
High Power ◽  
Sol Gel ◽  
Microcavity Lasers ◽  
Aluminosilicate Glasses ◽  
Erbium Doped

Long Luminescence Lifetime of 1.54 μ m Er3+ Luminescence from Erbium Doped Silicon Rich Silicon Oxide and its Origin

1998 ◽  
Vol 536 ◽  
Author(s):  
Se-Young Seo ◽  
Jung H. Shin ◽  
Choochon Lee
Keyword(s):  
Room Temperature ◽  
Radiative Decay ◽  
Silicon Oxide ◽  
Silicon Nanoclusters ◽  
Excitation Rate ◽  
Carrier Recombination ◽  
Erbium Doped ◽  
Doped Silicon ◽  
Almost All ◽  
Er Doped

AbstractThe photoluminescent properties of erbium doped silicon rich silicon oxide (SRSO) is investigated. The silicon content of SRSO was varied from 43 to 33 at. % and Er concentration was 0.4–0.7 at. % in all cases. We observe strong 1.54 μ m luminescence due to 4I13/2⇒4I15/2 Er3+ 4f transition, excited via energy transfer from carrier recombination in silicon nanoclusters to Er 4f shells. The luminescent lifetimes at the room temperature are found to be 4–7 msec, which is longer than that reported from Er in any semiconducting host material, and comparable to that of Er doped SiO2 and A12O3. The dependence of the Er3+ luminescent intensities and lifetimes on temperature, pump power and on background illumination shows that by using SRSO, almost all non-radiative decay paths of excited Er3+ can be effectively suppressed, and that such suppression is more important than increasing excitation rate of Er3+. A planar waveguide using Er doped SRSO is also demonstrated.

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