A5004067890- Luminescence Properties of Advanced Materials
- Inorganic Fluorides and Related Compounds
- Solid State Laser Technologies
- Atomic and Subatomic Physics Research
- Glass properties and applications
- Light effects on plants
- bioluminescence and chemiluminescence research
- Photorefractive and Nonlinear Optics
- Metallurgical Processes and Thermodynamics
- Magnetism in coordination complexes
- Radiation Detection and Scintillator Technologies
- Spacecraft and Cryogenic Technologies
- Lichen and fungal ecology
- Methane Hydrates and Related Phenomena
- Nuclear Physics and Applications
Prokhorov General Physics Institute
2016-2024
Herein, we report near-infrared-to-visible up-conversion (UC) in SrF<sub>2</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup> sub-micron crystals prepared <italic>via</italic> a facile route an aqueous solution.
The influence of light conversion induced by glasses coated with up-converting luminescent nanoparticles on Solanum lycopersicum cultivation was studied. Nanoparticles Sr0.46Ba0.50Yb0.02Er0.02F2.04 solid solution were used as the luminophore. These able to transform IR radiation into visible (λem = 660 nm minor peaks at 545 and 525 nm). By applying “variable” chlorophyll fluorescence (ΔF), it shown that tomatoes under photoconversion stimulated changes in rate plant adaptation ultraviolet...
It has been shown that the cultivation of plants under glass coated with nano-sized upconversion luminophores led to an increase in plant productivity and acceleration adaptation ultraviolet radiation. In present work, we examined effect nanopowders nominal composition Sr0.955Yb0.020Er0.025F2.045 on (Solanum lycopersicum) photochemistry. The composition, structure size nanoparticles were tested using X-ray pattern diffraction, scanning electron microscopy, dynamic light scattering....
The major challenge in optical ceramic technology is the quality of starting precursor powder for pressing, which a key element industry. One express and helpful technique estimation quantum yield up-conversion luminescence; therefore powders must exhibit high values luminescence efficiency. Single-phase solid solutions based on strontium fluoride doped with ytterbium erbium were synthesised by co-precipitation from aqueous using sodium fluoride, potassium ammonium as fluorinating agents....
The effect of upconverting luminescent nanoparticles coated on glass the productivity Solanum lycopersicum was studied. cultivation tomatoes under photoconversion led to an increase in plant and acceleration adaptation ultraviolet radiation. An total leaf area chlorophyll content leaves revealed plants growing glass. Plants were able more effectively utilize absorbed light energy. results this study suggest that spectral changes induced by can accelerate appearance
Recently, progress has been made in fabricating diamond-based scintillators with integrated rare-earth luminescent particles.
Study of the CaF 2 -YF 3 system by co-precipitation from aqueous nitrate solutions revealed formation Ca 1-x YxF 2+x solid solution precipitate containing up to 20 mol.% yttrium fluoride (x ≤ 0.2).A higher calcium ratio in starting caused additional precipitation orthorhombic β-YF nanophase elongated along b axis.Cubic (H O)Y F 10 phase was also formed (SSG Fm3m, a = 11.60 Å, KY structural type).
Efficient luminophores SrF 2 :Yb:Er were synthesized using different fluorinating agents, such as ammonium fluoride, sodium fluoride and potassium under the same synthesis conditions by co-precipitation from aqueous solution technique.
We synthesized powders of single-phase solid solutions Sr0.925–xBaxEu0.075F2.075 (x = 0.00, 0.20, 0.25, 0.30, 0.35 and 0.40) by a precipitation technique from nitrate aqueous solutions. The lattice parameters increase linearly as the barium content increases. recorded significant in X-ray luminescence intensity europium at increasing content. Upon content, strong 5D0 → 7F1 band increases exponentially, we observed blue red shifts position bands for 7F4, respectively
Single-phase samples of the Ba1−xCexF2+x solid solution (x = 0.3–0.4) were synthesized by directional crystallization in form single crystals and co-precipitation from aqueous nitrate solutions using potassium fluoride as a fluorinating agent nanopowders. The cathodoluminescence pressed powder was studied comparison with BaF2: Ce 250–460 nm (2.7–5 eV) spectral range upon excitation an electron accelerator. spectra revealed wide band 3.0–4.0 eV, which consists two typical components Ce3+...