Rare earth metal oxide semiconductors (REMOSs), rare earth sulphides, rare earth hydroxides, and their composites are currently the most investigated rare earth based nanomaterials. Environmentally safe, cost-effective, and scalable synthetic techniques can be used to make rare-earth based nanomaterials with substantial electrochemical …
The emergence of energy crisis and greenhouse effect has prompted people to develop energy storage equipment with excellent performance. Supercapacitors (SCs), also known as electrochemical capacitors, are widely studied for their high power density, fast charge and discharge and long cycle life. Rare earth
The aquosity acrylic acid energy storage luminous coating of the present invention has the advantages of no toxicity, no harm and environmental protection and has strong irradiance brightness after irradiated by natural light, lamp light, etc. Irradiance persistence ...
The present invention provides an energy-stored luminescence agen of luminous paint and its preparation method. The grain size of rare earth silicate or rare earth aluminate adopted by said invention is in the nano-grade range, and the surface of the rare earth silicate or rare earth aluminate is covered with a layer of water-proof layer.
From XPS it was noted that the 5d energy levels of rare earth ions occurs in close proximity to conduction band minima and 4f-energy levels were found above valance band maxima. It was evident from EPR measurement carried out for SrAl 2 O 4 :Eu 2+ that there is a decrease in the Eu 2+ ions concentration after UV excitation and it …
The present invention relates to a coated alkaline earth metal aluminate luminescent material activated by rare earth and a preparing technology thereof. The coated luminescent material is composed of a coating layer and a luminescent base body. The technology ...
The attapulgite energy storage luminous paint consists of purified attapulgite, strontium aluminate, nitrodope, banana oil, rutile type titanium dioxide and simethicone. The attapulgite energy storage luminous paint has the characteristics of tough painting film, strong adhesive force, high weather resistance, remarkable luminous effect, stable …
The invention discloses a rare-earth phosphate noctilucence powder coating. The coating is prepared from, by weight, 60-70 parts of basis resin, 10-20 parts of fillers, 10-15 parts of curing agents, 2-5 parts of auxiliaries and 5-10 parts of rare-earth phosphate. All the ...
The deposit contains ≥5.5% REO (rare earth oxides) and they are hosted in carbonatite dikes of about 10 cm wide (Wall and Mariano, 1996). LREE minerals such as bastnäsite, parisite, and synchysite have been reported from the Amba Dongar carbonatite complex, Gujarat ( Doroshkevich et al., 2009 ).
Therefore, rare earth (RE) doped phosphors are in the focus of current research activities and have been successfully applied in field emission displays (FEDs), luminescent paints, interior decoration, 3D displays technology, tri-color lamps, emergency lighting, safety indications, white light-emitting devices and agriculture field [ 13, 14 ].
2. Electroluminescence: Emission by recombination of electrons and holes under the influence of an electric field. 3. Radioluminescence: Luminescence that results from bombardment of the materials by various particles other than light, such as electrons, alpha particles (ions), X-rays, γ-rays, etc. 4.
Mechanoluminescence (ML) and long-afterglow (LAG) luminescence are usually studied independently and applied in different fields. SrAl2O4:Eu(II)/Dy(III) (SAOED) is a well-known long-afterglow and elastico-mechanoluminescent material that emits bright green visible light through absorption of photon energy, followed by naturally thermal …
Trivalent rare earth ions such as Sc 3+, Y 3+, La 3+, and Lu 3+ possess the stable, empty, or filled state, so they are optically inert ions and cannot show the photoactive behavior. Gd 3+ has half-empty 4f shell and produces a very stable 8 S 7/2 ground state with excitation energy higher than 32,000 cm −1, so the emission of Gd 3+ …
This chapter introduces the two types of rare earth luminescent nanomaterials: Upconversion nanoparticles (UCNPs) and downconversion nanoparticles (DCNPs). The overview will discuss the development, mechanism, composition, synthesis, characterization, UC emission tuning, and application of UCNPs.
The hardness of energy storage self-luminous plastics was between 10–100HA, which was meeting the requirements of medium hardness plastics, and could be further applied to luminous labels. The uniformity of the plastic was not affected by the addition of edible pigments, and the daytime color effect of the energy-storing self …
Abstract. The rare earth hydrogen storage alloy was coated with the same contents of carbon particles using sucrose, glucose, pitch, and chitosan as carbon sources, and compared with the samples of uncoated and mechanically mixed with the carbon powder. The results show that the maximum discharge capacity (C max ), high-rate …
Here, the emission peak at 520 nm originate from the 5d electron energy level of rare earth Eu 2+, this energy level can form many metastable energy levels with different trap depths. Moreover, previous literature found that different trap depths can absorb photons with corresponding energy to generate multiple continuous absorption …
Abstract. The upconversion (UC) luminescent materials typically refer to the materials doped with rare earth (RE) ions or transition metal ions as the luminescence centers, among which the lanthanides ions possess superior UC efficiency. UC luminescence (UCL) is a kind of anti-Stokes process, which absorbs two or more photons …
Even in full cells, the benefits brought by the rare earth oxide coating could still be maintained and a high energy density of 262 Wh kg −1 could be realized. The findings here bring new opportunities to make high-voltage high-nickel low-cobalt materials as practical cathodes to further boost the energy density of lithium-ion batteries.
In 2017, Song et al. successfully incorporated various rare earth ions (Ce 3+, Sm 3+, Eu 3+, Tb 3+, Dy 3+, Er 3+, and Yb 3+) into CsPbCl 3 perovskite nanocrystals. They also observed the quantum cutting effect induced by defect states, facilitated by the doping of Yb 3+ .