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73 results about "Pulse laser irradiation" patented technology
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Method and apparatus for nanometer-scale focusing and patterning of ultra-low emittance, multi-MeV proton and ion beams from a laser ion diode
InactiveUS6852985B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsLow emittanceGrating
Methods and apparatus for focusing proton and ion beams within the profile of the beam envelope of an ultra-low emittance, charge neutralized emission to create a pattern without focusing the entire beam envelope or rastering. In one implementation, a method for use with laser accelerated ion beams comprises the steps: irradiating a surface of a target with pulsed laser irradiation to produce an electron plasma emission on a non-irradiated surface of the target, the electron plasma emission producing an ion beam emission on the non-irradiated surface, the ion beam emission having a beam envelope; and focusing ions of the ion beam emission into a plurality of component beams within the beam envelope as a result of the shape of the non-irradiated surface of the target.
Owner:GENERAL ATOMICS
Optical component and method of manufacture of optical component
InactiveUS7405883B2Easy to manufactureIncrease freedomOptical fibre with graded refractive index core/claddingDiffusing elementsLow-pass filterRefractive index
An optical component or optical low-pass filter has two or more regions demarcated by differences in refractive indexes, in which a region having a refractive index different from the refractive index of the continuous region with the largest volume among the two or more regions is formed in the interior of a transparent material. This optical component or optical low-pass filter has regions with different refractive indexes formed in the interior by pulsed laser irradiation or focused irradiation of the transparent material.
Owner:OHARA
Semitransparent medium radiation characteristic measuring method based on pulse laser irradiation
ActiveCN103472036ASimple setting with few parametersHigh speedScattering properties measurementsTransmissivity measurementsBlack bodyLaser light
The invention relates to a semitransparent medium radiation characteristic measuring method based on pulse laser irradiation. The problem that an existing semitransparent medium radiation parameter measuring method based on transmission and reflection radiation signal measuring is complex, low in speed and bad in accuracy is solved. A laser light source irradiates the surface of one side of a semitransparent medium to be measured, black body coating layers are evenly arranged on the two sides of the semitransparent medium to be measured in a coating mode, and on the surface of one side of the semitransparent medium with the black body coating layers evenly coated, a thermocouple thermodetector is used for measuring and recording changing of temperature of the two surfaces of the medium along with time. According to the temperature on the two sides changing along with time, and the absorbing coefficient and the scattering coefficient of the semitransparent medium to be measured are obtained through an inverse problem algorithm. The semitransparent medium radiation characteristic measuring method is suitable for a plurality of fields such as aerospace, military, energy, chemical engineering, biology medical treatment and atmospheric sciences.
Owner:HARBIN INST OF TECH
SnO2/graphene composite material as well as preparation method and application thereof
InactiveCN111640925AHigh reactivityLarge specific surface areaNegative electrodesSecondary cellsMetallic foilFreeze-drying
The invention discloses a SnO2 / graphene composite material as well as a preparation method and application thereof, and belongs to the technical field of new energy materials. The preparation method comprises the steps of taking a metal Sn foil as a target material and deionized water as a solvent, and preparing a SnOx colloidal solution by adopting a liquid-phase pulse laser irradiation technology; and dropwise adding the SnOx colloidal solution into the graphene oxide solution, uniformly mixing and dispersing, carrying out hydrothermal reaction, and carrying out freeze drying on the productto obtain a SnO2 / graphene composite material. According to the SnO2 / graphene composite material prepared by the invention, SnOx and graphene oxide are subjected to an in-situ oxidation-reduction reaction in a hydrothermal process, so that uniform and tight anchoring of covalent bonding of ultrafine SnO2 quantum dots on a reduced graphene oxide lamellar wall is realized; and the porous structure ofthe reduced graphene oxide can also be maintained when SnO2 quantum dots are highly loaded.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for improving solar cell efficiency and preparing high-efficiency solar cell
InactiveCN102280526AImprove junction characteristicsImprove efficiencyFinal product manufactureLaser beam welding apparatusPulse laser irradiationSemiconductor
The invention discloses a method for improving the efficiency of a solar cell. The method is to irradiate the doped region of the solar cell with a pulsed laser, so that the impurities in the doped region form supersaturated replacement doping and are activated to reduce the gap The amount of doping can improve the quality of the semiconductor junction, reduce the recombination of carriers, increase the short-circuit current and open-circuit voltage, and finally achieve the purpose of improving the efficiency of solar cells.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Optical component and method of manufacture of optical component
InactiveUS20060119956A1Easy to manufactureIncrease freedomOptical fibre with graded refractive index core/claddingDiffusing elementsLow-pass filterRefractive index
An optical component or optical low-pass filter has two or more regions demarcated by differences in refractive indexes, in which a region having a refractive index different from the refractive index of the continuous region with the largest volume among the two or more regions is formed in the interior of a transparent material. This optical component or optical low-pass filter has regions with different refractive indexes formed in the interior by pulsed laser irradiation or focused irradiation of the transparent material.
Owner:OHARA
Method for regulating and controlling oxygen defects of cerium dioxide nano material by pulse laser irradiation in liquid phase
ActiveCN111003724AMild conditionsEfficient and fast regulation processMaterial nanotechnologyCerium oxides/hydroxidesFreeze-dryingCerium(IV) oxide
The invention discloses a method for regulating and controlling oxygen defects of a cerium dioxide nano material by pulse laser irradiation in a liquid phase, and the method comprises the following steps: dispersing CeO2 nanosheet powder in a solvent to prepare a 1mg / mL turbid liquid; wherein the solvent is at least one of water, methanol, ethanol or acetone; while stirring the turbid liquid, irradiating the turbid liquid for 5-60 minutes by adopting pulse laser with the wavelength of 355 nm or 532 nm, the pulse frequency of 20 Hz and the monopulse energy of 10-120 mJ; carrying out centrifugaltreatment, cleaning precipitates obtained by the centrifugal treatment by adopting deionized water, and then carrying out freeze drying to obtain the cerium dioxide nano material with reduced oxygendefects. The method is simple, safe, mild in condition, efficient and rapid in regulation and control process and environmentally friendly, other impurities are not introduced, and the pure and high-performance CeO2-x nano material with reduced oxygen defects can be obtained.
Owner:合肥中科纳普新材料有限公司
High-speed DDR single event effect evaluation system and method based on FPGA
PendingCN111444662AValid testEfficient StatisticsCAD circuit designComputer hardwarePulse laser irradiation
The invention relates to a high-speed DDR4 single event effect evaluation system and method based on an FPGA. The high-speed DDR4 single event effect evaluation system comprises a DDR4 to be tested, ahigh-energy irradiation experiment terminal or pulse laser irradiation platform and a single event test system. A DDR4 active region to be tested is located in the center of the high-energy irradiation experiment terminal or the pulse laser irradiation platform, and the DDR4 to be tested is in real-time communication with the single-particle test system; the lower computer system of the single particle test system is used for performing read-write operation on the DDR4 to be tested according to an instruction sent by the upper computer system and sending read-back data of the DDR4 to be tested to the upper computer system; and the upper computer system is used for issuing an instruction, carrying out read-write operation on the to-be-tested DRR4 in real time, carrying out read-back verification on written data, and discriminating single-particle soft errors, thereby realizing testing of the single-particle effect of the to-be-tested DRR4. The method can be widely applied to the fieldof single event effect testing.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Online monitoring device for surface hardness of 3D printing part in forming process and method
PendingCN110763715AGuaranteed validityAvoid the phenomenon that the hardness does not meet the standardMaterial analysis using wave/particle radiation3d printOptical spectrometer
The invention belongs to the technical field of 3D printing equipment detection and discloses an online monitoring device for the surface hardness of a 3D printing part in a forming process. The device comprises a workbench, a laser, a spectrograph, a light path device, a reflector, an electric control displacement device, a computer and a support. The electric control displacement device, the laser and the support are sequentially arranged on the workbench, the laser is arranged below the reflector, the light path device is arranged on one side of the electric control displacement device, andthe computer is arranged above the workbench. The invention further discloses a detection method. The device is mounted in a forming chamber of 3D printing equipment, the pulse laser irradiation canbe performed on a formed part of the part in real time to generate plasma, plasma spectrum data are collected to evaluate the surface hardness of the formed part, a condition that the overall surfacehardness of the 3D printing part meets a design requirement is ensured through online real-time hardness detection, and the phenomenon that the hardness does not reach a standard due to unpredictablefactors in the forming process is avoided.
Owner:FUJIAN UNIV OF TECH
Laser-assisted positive electrode interface layer construction method
ActiveCN113937252AAvoid time costReduce energy consumptionSecondary cellsPositive electrodesHeat stabilityLasing wavelength
The invention relates to a laser-assisted positive electrode interface layer construction method, which is characterized in that a specific precursor solution is decomposed on the surface of an electrode and deposited on the surface of the electrode through pulse laser irradiation, electrolyte decomposition and interface side reaction are inhibited, and the cycling stability is improved. The method is characterized in that an additive in a precursor solution is induced by pulse laser to be decomposed on the surface of a positive electrode to realize construction of a positive electrode protection layer, wherein the pulse laser power is 20-200 mJ cm<-2>, the electrode area corresponding to the use amount of the precursor solution is 20 [mu] L<-1> mL cm<-2>, and the laser wavelength is 1064 cm<-1>. Due to locality of laser heating, the additive with relatively good thermal stability can be decomposed on the surface of the electrode plate without damaging the electrode structure, so that the electrode is protected. The construction method for the positive electrode protection layer can be used for large-scale production, and is simple to operate and low in cost.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for improving quality of proton beam in interaction of laser and target
The invention relates to a method for improving the quality of a proton beam in the interaction of laser and a target. The method comprises the following steps: 1, pre-pulse laser being positively incident on the front surface of a metal target, and heating an irradiated area into plasma; 2, performing pre-pulse laser irradiation, the forward laser I21 being used as a main pulse, emitting forwardly on the front surface of the ionized metal target; 3, irradiating reverse laser I22 from a target back to the back surface of the target in the direction opposite to the forward laser I21; wherein the incident time of the reverse laser light falls behind the incident time of the forward laser light by delta t from the back of the target to the back surface of the target, the value range of deltat is 4-10 fs, the intensity I22 of the reverse laser light I22 being equal to a I21, and the value range of a being 0.1-0.6; when the reverse laser meets the condition that a is equal to 0.2, and whendelta t is equal to 8fs, forward expansion of hot electrons on the back of the target can be inhibited by the prime power of the reverse laser, so that the electron cloud set is distributed at a specific position near the surface of the back of the target, the strength of a sheath electric field on the back of the target is improved to be optimal, the energy of protons is improved to be optimal,and the divergence angle of the protons is reduced.
Owner:ZHENGZHOU UNIVERSITY OF AERONAUTICS
Processing and analyzing system and method of mass spectrum device
PendingCN113745090AAccurate measurementTime-of-flight spectrometersSamples introduction/extractionData acquisitionEngineering
The invention discloses a processing and analyzing system of a mass spectrum device. The processing and analyzing system comprises a sample injection system, a sample ionization system, an ion detector, a data acquisition card, a control panel and analysis software, the sample injection system comprises a sample injection cavity and a main body cavity, and a sample target is arranged at the position of the sample cavity; the sample ionization system comprises a vacuum system and an ion source, and the vacuum system is used for vacuumizing a vacuum area; the ion detector is used for detecting flight time of ions with different mass-to-charge ratios; the data acquisition card is used for acquiring and converting an electric signal output by the ion detector and transmitting the electric signal to the control panel; the analysis software is installed on a processor, and the processor receives data transmitted by the control panel and analyzes the data through the analysis software. According to the vacuum system, the pressure intensity in a vacuum area can reach 3*10<-4> Pa or below, under high-pulse laser irradiation, a sample is effectively ionized, the detection limit reaches 1 fmol / ul, and the quality detection accuracy is as follows: the precision of an internal standard method is 150 ppm, and the precision of an external standard method is 200 ppm.
Owner:深圳泰莱生物科技有限公司 +1
Joining carbon laminates using pulsed laser irradiation
ActiveUS20200290293A1Improve accuracyDefect and stressLayered productsVehicle componentsSurface patternAdhesive
A method for bonding two elements, the method including receiving first and second elements, the first element being a composite material; applying a laser-based treatment to a surface of the first element to obtain a treated surface; patterning the treated surface to have plural trenches; applying an adhesive to one of the first and second elements; and joining the first element to the second element so that the adhesive is between the first and second elements.
Owner:UNIV DELLA CALABRIA +1
Method for coloring substrate of capacitive touch screen
ActiveCN104375723ANot easy to fall offImprove permeabilityInksInput/output processes for data processingCooking & bakingEngineering
The invention provides a method for coloring a substrate of a capacitive touch screen. The method for coloring the substrate of the capacitive touch screen comprises the following steps that a hydrographics transfer film is flat laid on the water surface; an activating agent is sprayed on the surface of the hydrographics transfer film, wherein the activating agent comprises, by weight, 20 parts to 25 parts of diethylene glycol monoethyl ether, 15 parts to 20 parts of N'N-carbonyldiimidazole, 40 parts to 50 parts of xylene and 5 parts to 10 parts of n-butyl alcohol; polishing, pulse laser irradiation and baking are conducted on the substrate of the capacitive touch screen in sequence, then the substrate of the capacitive touch screen is immersed in water, printing ink in the hydrographics transfer film is transferred to the surface of the substrate of the capacitive touch screen under the action of water pressure, and cleaning and drying are conducted. According to the method, the hydrographics transfer printing method is used for coloring the substrate of the capacitive touch screen, it is guaranteed that the thickness of a formed coating is small, the stability is high, falling is unlikely to happen, the technology is simple, and reliability is high.
Owner:FUJIAN FEIYANG OPTRONICS
Pulse laser irradiation wide bandgap power device
ActiveUS12392816B1Semiconductor operation lifetime testingContactless testingTemperature controlControl system
The present invention discloses an experimental apparatus and a test method for a pulse laser irradiation wide bandgap power device. The apparatus includes an optical path coupling system, a circuit test system, a temperature control system, and an interaction control system. According to the present invention, irradiation sensitive region locating, irradiation transient current tests, irradiation sensitive condition tests, and irradiation degradation tests for the wide bandgap power device are implemented, and advantages of convenience in experiments, simple operation, automated tests, comprehensive and accurate test results, and the like are achieved.
Owner:NANJING UNIV
Perovskite solar cell with cysteine-silver cluster target implanted perovskite active layer
PendingCN120733665AMaterial nanotechnologyTransportation and packagingElectrical batterySolar battery
The invention belongs to the technical field of solar cells, and particularly relates to a perovskite solar cell with cysteine-silver clusters implanted into a perovskite active layer in a targeted mode, a cysteine-silver cluster colloidal solution is prepared by adopting a liquid-phase pulse laser irradiation technology, the cysteine-silver clusters serve as an additive and are implanted into the perovskite solution, and the perovskite active layer is prepared. And sequentially spin-coating a hole transport layer, a perovskite layer and an electron transport layer, and finally evaporating a metal electrode to prepare the perovskite solar cell with the cysteine-silver cluster target implanted perovskite active layer. The cysteine-silver cluster is implanted into the perovskite solution, and the smaller critical dimension of the cysteine-silver cluster can be used as a nucleation site, so that the growth of perovskite crystals is regulated and controlled, the defects of the perovskite thin film are passivated, the residual stress of the thin film is released, the formation of gradient energy levels of the perovskite layer and the electron transport layer is promoted, and the extraction and transmission of electrons are improved; the perovskite solar cell with higher efficiency is obtained, the implantation mode is convenient, and the preparation process is simple.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Pulse laser irradiation experimental device
ActiveCN120334703ASemiconductor operation lifetime testingContactless testingControl systemRefractive index
The invention relates to a pulse laser irradiation experimental device. Comprising an optical parameter measurement platform, an optical path coupling module, a photoelectric test module, an electrical test platform, a first control system and a second control system, the first control system is used for fitting the elliptic polarization state change parameters with a scanning model to obtain the refractive index and the extinction coefficient of the single-layer film; the second control system is used for inputting the refractive index, the extinction coefficient, the reflectivity and the transmissivity of the thin film into a device incidence model to calculate effective pulse laser energy when pulse laser with different wavelengths penetrates through each layer of thin film to reach an active region in the to-be-measured wide bandgap power device, and obtaining an equivalent heavy ion LET value according to the effective pulse laser energy; and the light path coupling module, the photoelectric test module and the electrical test platform are controlled to carry out closed-loop adjustment on pulse laser energy. According to the invention, accurate control and adjustment of pulse laser energy are realized.
Owner:NANJING UNIV
Method and system for amorphizing metal material by adopting ultrafast pulse laser
The invention relates to a method and system for amorphizing a metal material by adopting ultrafast pulse laser, and belongs to the technical field of ultrafast pulse laser application. Firstly, an ultrafast laser pulse sequence is focused on a metal crystal in water through an objective lens, an ultrafast pulse laser irradiation area of the metal crystal is melted by regulating and controlling the number and energy flux of ultrafast laser pulses incident on the metal crystal, and rapidly cooling and quenching are carried out to prepare amorphous metal. According to the method and the system,the single pulse energy incident into the metal crystal material is strictly controlled by adjusting a precise attenuation wheel, so that metal is rapidly melted and rapidly cooled, and therefore, thedegree of amorphization can be controlled. The cooling speed of the metal can reach 1012-1013K / s and is faster than that of a conventional processing means, and the new method and the related systemfor realizing the amorphization of the metal are provided. According to the method, the mechanical property and the corrosion resistance of the material are more optimized, so that the amorphous single metal has a wider application prospect.
Owner:TSINGHUA UNIV
Preparation method of organic-inorganic composite microcapsule, obtained product and application
The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.
Owner:QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Method of pulsed laser irradiation with reduced thermal damage
Optical energy for example, ultra-short laser beam pulses are delivered to a substrate by applying a temporal group 17 of optical pulses 16 to a region of the substrate 24. The temporal group 17 which
Owner:UNIV OF SOUTHAMPTON
Pulse laser-based over-focus scanning optical microscopic imaging device and method
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Electrolysis method for efficiently recovering copper from electroplating waste liquid / waste mud
PendingCN121321096APhotography auxillary processesElectrolysis componentsChemical industryHigh concentration
The invention relates to the technical field of metallurgy and chemical engineering, and particularly discloses an electrolysis method for efficiently recovering copper from electroplating waste liquid / waste mud, which specifically comprises the following steps: copper leaching, purification and acid regulation, complexing iron removal, electrodeposition copper deposition and photocatalytic air flotation treatment. Wherein in the electrodeposition copper deposition stage, through the synergistic effect of a pulse power supply, pulse laser irradiation and a rotating cathode, the rotating cathode continuously conveys high-concentration copper ions to a cathode interface through the convection effect; the pulsed power supply reduces an electric crystallization nucleation energy barrier in cooperation with laser irradiation while increasing the deposition rate, and improves the copper deposition compactness. And high-speed and high-efficiency deposition of copper and high density and high purity of a cathode product are realized through cooperation of the three components. And in the photocatalytic air flotation treatment stage, a trace amount of residual copper in the copper-poor liquid is efficiently enriched through a bismuth tungstate photocatalytic reduction and new copper reagent selective complexing air flotation separation technology, and the total recovery rate of copper is increased.
Owner:WENZHOU KERUI ENVIRONMENTAL RESOURCES UTILIZATION CO LTD
A pulsed laser irradiation experimental device
ActiveCN120334703BSemiconductor operation lifetime testingContactless testingControl systemRefractive index
The present invention relates to a pulsed laser irradiation experimental device. It comprises an optical parameter measurement platform, an optical coupling module, an optoelectronic test module, an electrical test platform, and a first control system and a second control system. The first control system is used to fit the ellipsometric state change parameters with a scanning model to obtain the refractive index and extinction coefficient of a single-layer thin film. The second control system is used to input the refractive index, extinction coefficient, reflectivity, and transmittance of the thin film into a device incident model to calculate the effective pulsed laser energy of pulsed lasers of different wavelengths when they pass through each layer of thin film and reach the active region in a wide bandgap power device to be tested. The equivalent heavy ion LET value is obtained based on the effective pulsed laser energy, and the optical coupling module, optoelectronic test module, and electrical test platform are controlled to perform closed-loop regulation of the pulsed laser energy. The present invention achieves accurate control and regulation of pulsed laser energy.
Owner:NANJING UNIV
Oxyferric chloride microsheets loaded with noble metal nanoparticles and preparation method thereof
InactiveCN105251519BLarge specific surface areaHigh catalytic degradation efficiencyPhysical/chemical process catalystsWater/sewage treatment by oxidationPt elementFerric Compounds
The invention discloses an oxyferric chloride microsheet loaded with noble metal nanoparticles and a preparation method thereof. Microsheets have a length of 5-50 μm, a width of 2-10 μm, and a thickness of 0.2-1 μm, and are loaded with noble metal nanoparticles with a particle size of 10-120 nm, wherein the noble metal is gold, or platinum, or silver ;Methods First place the noble metal target in the ferric chloride solution under stirring, and then use laser irradiation with a wavelength of 532nm or 1064nm, a repetition frequency of 1-20Hz, a pulse width of 5-15ns, and a power of 40-120mJ / pulse The noble metal target is used for at least 1 min to obtain a mixed colloidal solution, and then the mixed colloidal solution is sequentially subjected to solid-liquid separation, washing and drying to obtain the target product. It has a higher performance of Fenton's catalytic degradation of sewage, and is extremely easy to be widely commercially applied to the catalytic degradation of pollutants in aqueous solution.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
A simulation method and system for the temperature field and stress field of a material irradiated by short-pulse laser
ActiveCN119905186BDesign optimisation/simulationConstraint-based CADNetwork modelMechanical engineering
The present invention belongs to the technical field of the interaction between laser and matter, and relates to a simulation method and system for the temperature field and stress field of a material irradiated by short-pulse laser. The simulation method includes: determining simulation parameters, including short-pulse laser irradiation parameters and material property parameters; constructing a thermo-mechanical coupling transient model of the material, and determining the boundary conditions of the heat transfer physical field and the solid mechanics physical field of the model; performing grid division on the thermo-mechanical coupling transient model, and configuring solver parameters; specifically: inputting the short-pulse laser pulse width and the short-pulse laser frequency into a pre-trained linear neural network model, and calculating to obtain the solver parameters; applying the solver to solve the thermo-mechanical coupling transient model to obtain the temperature field and stress field distribution of the material at different irradiation times. The simulation method of the present invention can comprehensively and accurately capture the complex transient physical process of the material under the action of short-pulse laser.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
A special-shaped porous biomass-based nano-activated carbon-graphene composite adsorption material
ActiveCN116889861BOther chemical processesDispersed particle separationActivated carbonBiomass carbon
The present invention discloses a special-shaped porous biomass-based nano-activated carbon-graphene composite adsorption material. A carbonized and activated biomass carbon source and graphene oxide are dispersed in a solvent to obtain a mixed solution, and a binder is added thereto. The mixed solution is used as a liquid target and subjected to pulsed laser irradiation under continuous stirring to ablate the liquid target. After the ablation, the material is centrifuged and washed to obtain a special-shaped porous biomass-based nano-activated carbon-graphene composite adsorption material. The preparation process of the present invention is simple, and only laser irradiation / ablation technology is required to obtain a graphene and activated carbon composite adsorption material with good performance; and in the prepared special-shaped porous biomass-based nano-activated carbon-graphene composite adsorption material, the activated carbon and graphene are tightly combined and uniformly dispersed on the graphene, and the morphology and size of the activated carbon can be controlled.
Owner:JINAN GUOKE MEDICAL TECH DEV CO LTD
Chip irradiation damage identification system and method based on pulse laser cooperative scanning
The invention provides a chip irradiation damage identification system and method based on pulse laser cooperative scanning. The system comprises a pulse laser output module and a cooperative control module. The pulse laser output module is used for coupling laser light paths output by the multiple paths of pulse laser light sources into a single laser light path; the system comprises a pulse laser irradiation state and a damage identification state, the cooperative control module is used for switching the working state of the system, when the working state is switched to the pulse laser irradiation state, the pulse laser output module is started, and the displacement table is controlled to drive the sample table for placing the chip to move, so that the chip moves within a set scanning range at set scanning precision; and when the damage identification state is switched to, the electromagnetic shielding cover and the high-sensitivity CCD camera are started, bias voltage is applied to the chip, the light emitting condition of the chip is identified, and the irradiation sensitive points of the chip are recorded. According to the invention, the damage distribution condition of the chip before and after pulse laser irradiation can be efficiently obtained.
Owner:NANJING UNIV +1
Preparation method of silicon solar cell with coplanar electrode
The invention discloses a preparation method of a silicon solar cell with a coplanar electrode, which comprises the following steps of: epitaxially growing an N-type silicon buffer layer, a P-type SiGe absorption layer with gradually reduced Si component and a P-type Si covering layer on an N-type silicon substrate through an MOCVD (Metal Organic Chemical Vapor Deposition) technology, then evaporating a layer of Zn metal film on the surface of a sample, and carrying out P-type heavy doping on the Si covering layer through pulse laser irradiation, evaporating a Ti / Al metal layer on the surface of the sample to form P-type electrode metal; the preparation method comprises the following steps: preparing a silicon substrate, forming a finger electrode region through photoetching, etching to the silicon substrate region by adopting ICP (Inductively Coupled Plasma), evaporating a Ti / Al metal layer to form N-type electrode metal, and annealing in a nitrogen atmosphere to form P-type ohmic contact and N-type ohmic contact to obtain the silicon solar cell. The silicon solar cell prepared by the invention has the advantages of low series resistance, low heating, high absorption efficiency and the like.
Owner:FUZHOU UNIV
A method for supporting small-size noble metals on a molybdenum carbide carrier
The application discloses a kind of liquid-phase laser preparation methods of molybdenum carbide carrier load metal composite material, first based on liquid-phase pulse laser ablation technology in acetone ablation elemental Ag or Au target material, obtain the Ag or Au nanoparticle of uniform dispersion with 1-2 layers carbon layer coating, the process metal nanoparticle size distribution is uniform and adjustable.Then utilize pulse laser irradiation technology to make oxide MoO3 powder in high carbon reduction liquid phase environment (acetone) in situ carbonization change into MoC nanoparticle.Finally, using 355nm wavelength laser irradiation metal nanoparticle and MoC mixed liquid can prepare Ag@MoC or Au@MoC etc. series composite materials.The method improves the traditional metal doped molybdenum carbide process, without adding any other surfactant, stabilizer and other chemical reagents, avoid the generation of other impurity products.Operation is simple, green and efficient, and strong universality.
Owner:HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
Method for detecting unwanted interface charge of mercury cadmium telluride thin film photovoltaic device
The invention discloses a method for detecting harmful interface charges of mercury cadmium telluride thin-film photovoltaic devices. The method uses a beam of ultrafast pulsed laser light with photon energy greater than the band gap of the tested device to back-irradiate the HgCdTe device, and uses a digital oscilloscope to measure the two phases of the photovoltaic device. The evolution relationship between the transient photovoltaic signal between electrodes and time, according to the interface charge-induced electric field measured by the external circuit and the photo-generated electromotive force formed by the pn junction electric field are separated in the time dimension, and the photo-generated electromotive force formed by the interface charge-induced electric field and the effective The identification of the photoelectromotive force formed by the built-in electric field of the metallurgical pn junction can easily obtain the information of the interface charge that has a great influence on the photoelectric response of the device. This is a convenient, rapid and non-destructive identification method, which is of great significance for improving device performance, improving device stability, and guiding people to explore new devices.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI