43 results about "Quantum cutting" patented technology

The invention discloses a material having cooperative frequency light conversion performance, and a preparation method and application thereof. The material having cooperative frequency light conversion performance has the molecular formula: YxYby(sigma Ln)zF3, wherein x is not less than 0 but less than 1, y is more than 0 but less than 1, z is more than 0 but not more than 0.50, Ln is any one or more than one of the rare earth elements including Ce, Tm, Er, Ho, Dy, Tb, Gd, Eu, Sm, Nd and Pr. The preparation method of the material having cooperative frequency light conversion performance is any one of the group consisting of conventional high-temperature solid phase method, hydrothermal synthesis method and co-precipitation method. The fluoride material having cooperative frequency light conversion performance according to the invention realizes the combination of two mechanisms, i.e. upper conversion and quantum cutting lower conversion, effectively converts ultraviolet and infrared lights into a visible light at certain frequency simultaneously while the reinforcement twice as much as the intensity of the visible light at the frequency is obtained, and has the advantages of low cost, simple and convenient synthesis method and batch production.

The invention discloses an application of down-conversion luminescent material on dye-sensitized solar cells, which covers down-conversion luminescent material doped by nano particles with particle size of 5 to 50nm and rare earth taking phosphate, silicate and vanadate with a core-shell structure as a substrate on the surface of the dye-sensitized solar cell, dopes the down-conversion luminescent material into a nano TiO2, nano ZnO or SnO2 semiconductor material porous membrane to prepare a nano semiconductor photoelectrode with down-conversion function or disperses the down-conversion luminescent material in the electrolyte of the dye-sensitized solar cell. The invention utilizes the down-conversion luminescent material to convert ultraviolet light into visible light, thus not only solving the problem of instability of a solar cell caused by the ultraviolet light, but also absorbing an ultraviolet spectrum by the quantum cutting technology to emit the visible light so as to cause the cell to utilize sunlight to the maximum extent, and improve the photoelectric conversion efficiency and the performance stability of the cell.

The invention discloses a near-infrared quantum cutting transparent film and a preparation method thereof and belongs to the field of solid luminescence materials. The raw materials of the film include Y2O3, Bi2O3 and Yb2O3; the mole fraction of the Bi2O3 is 0.25-1% and the mole fraction of the Yb2O3 is 0.5-5%. The preparation method comprises the following steps of: adding Bi2O3 powder and Yb2O3 powder to Y2O3 powder, ball-milling and mixing, drying and then calcinating at the temperature of 1200 DEG C for 12h and pressing into ceramic targets by using a hot pressing method; introducing oxygen by using a silicon wafer or quartz as a substrate through a laser pulse deposition method, wherein the temperature of the substrate is 400-800 DEG C, the distance between target bases is 5-8 cm, the working pressure is 0.5-10 Pa and the laser energy is 100-400 mJ/pulse. When the film is excited by the ultraviolet light, the efficient near-infrared quantum cutting down-conversion luminescence can be realized; and the heating effect of silicon solar cells is expected to be reduced and the photoelectric conversion efficiency of the cells is increased.

The present invention relates to light emitting, display and scintillation material technology, and is especially one kind of light-emitting Pr doped tungstate material and its use. The light-emitting Pr doped tungstate material may be in monocrystal, powder or glass form. By means of the quantum cutting of Pr3+ ion and the energy transfer between tungstate radical and Pr3+ ion, one photon in deep ultraviolet area or in even short wavelength area is converted into two visible photons for human eye and CCD to sense, so as to realize quantum cutting to the 490-650 nm visible light area in the total quantum efficiency over 100 %. The light-emitting Pr doped tungstate material is used as the ultraviolet and even short wavelength ray excited light emitting material and the scintillation material in short wavelength photon detector and high energy particle detector.

The invention relates to the technical field of fluorescent powder production, and discloses a near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and a preparation method thereof. The near-infrared quantum cutting fluorescent powder has a chemical formula as follows: LaBO3:Ce<3+>(1%),Yb<3+>(x%), wherein the x is not less than 2 and not more than 3. According to the near-infrared quantum cutting fluorescent powder, when each ultraviolet photon is absorbed, a Ce<3+>-Yb<3+> ion pair can emit two near-infrared photons through cooperation energy transmission, thus emitting 980 nm near infrared light. The near-infrared quantum cutting fluorescent powder is advantageous in that silicon solar cell spectrum absorption scope can be widened, and therefore the silicon solar cell conversion efficiency can be increased.

The invention discloses a solar-blind ultraviolet light detecting device, which uses the quantum tailoring technology to complete the wavelength conversion and photon number amplification function ofprobe light. The quantum-cut fluorescent glass in an integrating sphere absorbs 200 nm to 280 nm of solar-blind ultraviolet photons, and is stimulated to radiate 2 to 3 times the number of long-wavelength photons; an exit window end of the integrating sphere is connected to a photomultiplier tube of an active device, the output current of the photomultiplier tube is proportional to the number of the received photons, and the sensitivity to the visible band light is 2 to 10 times that of the solar-blind ultraviolet light. The filtering effect of a filter arranged on an incident window of the integrating sphere can strictly limit the detection wavelength range, and can multiply the sensitivity of detection of solar-blind ultraviolet light.

The invention provides a tungstate near infrared quantum cutting material and a preparation method and an application thereof, and the chemical composition formula of the quantum cutting material is Ca0.99-xWO4:0.01Nd3+, xYb3+, wherein Ca0.99-xWO4 is a substrate; Nd3+ and Yb3+ are doped rare earth ions; x is the molar quantity of the doped rare earth ion Yb3+, and 0.01<=x<=0.3. The preparation method of the quantum cutting material adopts a traditional high temperature solid phase calcining method to synthesize the tungstate near infrared quantum cutting material. The tungstate near infrared quantum cutting material can be excited by visible light of 300-700 nm, and emit high-intensity near infrared light within a range of 900-1500 nm; the light within the wave band can be effectively absorbed by silicon-based solar energy cells, and has calculated quantum efficiency of up to 181%. The tungstate near infrared quantum cutting material is applicable to the preparation of solar energy cells.

The invention relates to an application of a single rare earth infrared first-order quantum cutting in a solar cell. The single rare earth is an Er <3+> ion or a Tm <3+> ion which exists in a quantum cutting layer on a light incident surface of the solar cell; and infrared quantum cutting of a three-photon or four-photon excited by light ultraviolet and visible light is realized.

The invention discloses a transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting. The glass ceramic comprises the following components expressed in mole percent: 30 to 50 mol% of SiO2, 20 to 35 mol% of Al2O3, 5 to 20 mol% of CaCO3, 5 to 20 mol% of NaF, 9.6 to 14.5 mol% of CaF2, 0.1 to 1.0 mol% of EuF3 and 0 to 2 mol% of YbF3. A sample is prepared by using a melt quenching process and subsequent heat treatment; a preparation method for the transparent glass ceramic is simple, produces no pollution and costs little. Coupling of the transparent glass ceramic with a silicon solar cell can hopefully reduce the thermalization effect of the silicon solar cell and improve photoelectric conversion efficiency of the cell.

The invention relates to a preparation method of a downconversion fluorescent material, which comprises the following steps: 1, selecting fluorescent powder which has a chemical general formula shown in the specification or preparing raw materials of the fluorescent powder; 2, adding powder containing Yb<3+> into the fluorescent powder; 3, evenly mixing and stirring; and 4, sintering to form the downconversion fluorescent material which has a chemical general formula shown in the specification. According to the invention, the quantum cutting effect can be achieved, and the quantum efficiency can exceed 100%.

A quantum tailoring photovoltaic module. It is mainly to solve the problem of low efficiency of existing photovoltaic modules. The packaging film contains rare earth elements with quantum tailoring effect, such as adding BaF2, rhenium Re3+, ytterbium Yb3+ ions, etc. to the EVA film, which can improve the photoelectric conversion efficiency of the cell. Mainly used for solar cell power generation.

The invention provides a Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material. A composition general formula of the luminescent material is Y3Al5O12:xBi<3+>, yNd<3+>, zYb<3+>, wherein x is greater than or equal to 0.5*10<-2> and less than or equal to 1*10<-2>, y is greater than or equal to 0.5*10<-2> and less than or equal to 2*10<-2> and z is greater than or equal to 1*10<-2> and less than or equal to 10*10<-2>. According to the Bi-Nd-Yb co-doped YAG high-efficiency and wide-spectrum quantum cutting luminescent material provided by the invention, Nd<3+>-Yb<3+> co-doping belongs to two-step energy transmission and has relatively high energy conversion efficiency; Bi<3+> in the luminescent material can be used for effectively expanding an absorption section of Nd<3+> through a sensitization effect; sunlight is subjected to broadband absorption so that high-efficiency and wide-spectrum conversion type near-infrared quantum cutting is realized; finally, the sunlight is sufficiently utilized and the conversion efficiency of a crystalline silicon solar cell is improved.

The invention discloses a fluoroaluminate near-infrared quantum cutting material, and a preparation method and application thereof. The fluoroaluminate near-infrared quantum cutting material has a chemical formula: Sr3(0.99-x)AlO4F: 0.01Ce<3+> and xYb<3+> (x is not less than 0 and not more than 0.1). The preparation method for the fluoroaluminate near-infrared quantum cutting material comprises the followings steps of: weighing a strontium raw material, an aluminium raw material, a cerium raw material and a ytterbium raw material according to the molar ratio in the chemical formula; and grinding each material and mixing uniformly, then heating to 1200 DEG C at the speed of 600 DEG C/h under the CO reducing atmosphere, keeping the constant temperature of 1200 DEG C for 4 h, and cooling to obtain the powdered fluoroaluminate near-infrared quantum cutting material. The fluoroaluminate near-infrared quantum cutting material disclosed by the invention has the advantages of high luminous intensity, good stability, high quantum efficiency and environment-friendliness.

The invention provides a gold nano array substrate and a preparation method thereof, and a composite structure of the gold nano array substrate and a near-infrared quantum cutting luminescent material, and a preparation method thereof. According to the invention, a gold nano array substrate with a single-mode, narrow-linewidth and high-quality factor surface lattice resonance peak is designed, onthe basis, a composite structure of the array substrate and a near-infrared quantum cutting luminescent material is constructed, and highly localized surface lattice resonance is utilized to enhance three-photon near-infrared quantum cutting luminescence of a specific wavelength; and the preparation process is simple, the operation is convenient, the cost is low, an efficient solar cell light conversion sheet can be provided, the photoelectric conversion efficiency of the solar cell is improved, and the solar cell light conversion sheet is suitable for popularization.

The invention discloses a Tm<3+> single-doped three-photon infrared quantum cutting microcrystalline glass as well as a preparation method and an application thereof. The microcrystalline glass is formed with LaF3 nanocrystal-containing oxofluorogermanate transparent microcrystalline glass as a matrix and Tm<3+> as activating agent ions, and the composition, in a molar ratio, of the microcrystalline glass is 50GeO2-20Al2O3-15LaF3-15LiF-xTmF3, wherein x is greater than or equal to 0.05 and less than or equal to 1.00. During preparation, GeO2, Al2O3, LaF3, LiF and TmF3 are taken as raw materials, and weighing and proportioning the raw materials according to the nominal composition 50GeO2-20Al2O3-15LaF3-15LiF-xTmF3 in the molar ratio, wherein x is greater than or equal or 0.05 and less than or equal to 1.00, and then taking the method of melt quenching in combination with subsequent heat treatment. The microcrystalline glass is capable of effectively absorbing 455-485nm blue light photons to excite the Tm<3+> ions to the energy state 1G4, and also capable of emitting three infrared photos in succession with 3H4 and 3F4 as intermediate energy states. The quantum efficiency of the Tm<3+> single-doped three-photon infrared quantum cutting microcrystalline glass is calculated within the range from 1.59 to 1.61.

The invention discloses transparent glass ceramics with quantum cutting luminescence characteristics and a preparation method and purposes thereof. The glass ceramics comprises the following components: 40 to 60mol percent of SiO2, 10 to 30mol percent of Al2O3, 5 to 25mol percent of TbF3, 0 to 15mol percent of NaF, 0 to 15mol percent of LiF, 0.01 to 5mol percent of YbF3, less than 0.5mol percent of MSO4, less than 0.02mol percent of Fe, and M refers to Mg, Ca, Ba or Sr. The glass ceramics has the following microstructure characteristic that: TbF3 nanocrystallines which are doped with rare earth and is an orthogonal structure are uniformly distributed in a glass substrate. The glass ceramic material can be excited by blue light to realize converting and giving off light under the high-efficiency near infrared quantum cutting. By being coupled with a silicon solar cell, the transparent glass ceramics is expected to reduce the heating effect of the solar cell and improve the photoelectric conversion efficiency of the cell.

The invention relates to a crystalline silicon battery assembly containing a quantum cutting coating. A layer of perovskite quantum dot material with a light down-conversion function is deposited on the surface of the crystalline silicon assembly or the top packaging glass of the crystalline silicon assembly. The absorption visible light (550 nm-560 nm) which cannot be absorbed by the crystallinesilicon assembly is down converted into the infrared light which can be absorbed by the crystalline silicon assembly, so that the absorption of the crystalline silicon assembly to the infrared light is increased, and the energy conversion efficiency of the crystalline silicon assembly is improved by about 10%. The invention further discloses a preparation method of the crystalline silicon batteryassembly containing the quantum cutting coating, and the preparation method is simple in preparation process and suitable for mass production.

The invention relates to an under-light conversion layer for a silicon solar cell and a manufacturing method of the under-light conversion layer. Firstly, a rare earth organic-inorganic hybrid near-infrared quantum cutting nano material is prepared and is evenly dispersed in a transparent polymer, and the under-light conversion layer for a silicon solar cell is prepared by means of a spin-coating method or a dip-coating method. The rare earth organic-inorganic hybrid near-infrared quantum cutting nano material in the conversion layer has a large light absorption molar coefficient and a wide absorption band, comprises an inorganic matrix which protects cations at the luminescence center from luminescence quenching of a non-radiative passivating source, and is compatible with high-molecular polymers. The rare earth organic-inorganic hybrid near-infrared quantum cutting nano material can effectively absorb short wavelength photons with poor cell spectrum response in sun light and emit near-infrared photons with good silicon solar cell spectrum response, so that silicon solar cell spectrum response can be improved, energy loss of a silicon solar cell caused by spectrum mismatch can be reduced, and the photoelectric conversion efficiency of the silicon solar cell can be improved.

The invention relates to a solar cell backboard with a down-conversion function, and the backboard comprises an inner layer film, a first adhesive layer, a base layer film, a second adhesive layer and an outer layer film which are arranged in sequence; the inner layer film is a PEVE film layer with a double-layer structure, the PEVE film layer comprises a PEVE film fluorescent layer and a PEVE film reflective layer, the PEVE film fluorescent layer is doped with a rare earth compound with a down-conversion function, which is converted into near-infrared light. The inner layer film is arranged to be the PEVE film layer of the double-layer structure, the PEVE film layer comprises the PEVE film fluorescent layer doped with the rare earth compound with the down-conversion effect and the PEVE film reflective layer, and due to the fact that the rare earth compound fluorescent agent with the quantum cutting effect is added into the PEVE film fluorescent layer, high-energy ultraviolet light can be absorbed; high-energy ultraviolet light rays are converted into low-energy near-infrared light which can be absorbed by the silicon cell in a quantum cutting mode, so degradation damage of the photovoltaic back plate caused by irradiation of the ultraviolet light rays is avoided, and the power generation efficiency of the silicon cell is also improved.

The invention belongs to the technical field of solar cell preparation, and particularly relates to a preparation method of a quantum cutting coating, a solar cell, an assembly and a preparation method. The method comprises the following steps: mixing a down-conversion material with organic glue, coating the surface of a glass substrate with the mixture, and curing to obtain the quantum cutting coating. The patterned quantum cutting coating is prepared on the glass substrate creatively by adopting an organic glue pre-curing mode, so that the quantum cutting coating does not move relative to a glue film in the subsequent laminating process, the uniformity of the film layer is improved, and the problems that in the prior art, due to the fact that the quantum cutting coating is prepared by adopting an organic solvent, the coating is not uniform, and the quality of the film layer is poor are solved. And the conversion efficiency of the assembly is influenced.