32results about How to "Avoid recombination" patented technology

The invention provides a manufacturing method of a back contact solar cell and the back contact solar cell, and belongs to the technical field of solar cells. The manufacturing method of the back contact solar cell comprises the steps that a semiconductor substrate is provided, the semiconductor substrate is provided with a first surface and a second surface which are opposite, the first surface is a textured surface or a plane, and the second surface is a plane; and a first carrier collection region, a second carrier collection region and an isolation region between the first carrier collection region and the second carrier collection region are arranged on the second surface of the semiconductor substrate.

The invention discloses a near-infrared light mediated heterogeneous composite photocatalyst as well as a preparation method and application thereof, the heterogeneous composite photocatalyst is an up-conversion luminescent material loaded semiconductor material, and can realize up-conversion luminescent catalysis under the irradiation of 980nm near-infrared light; the up-conversion luminescent material is rare earth ion doped fluoride nanoparticles, fluoride is one or two of yttrium fluoride and sodium yttrium tetrafluoride, the doped rare earth ions comprise rare earth luminescent center ions and light absorption ions, the luminescent center ions comprise one of Er < 3 + >, Tm < 3 + >, Tb < 3 + > and Pr < 3 + >, and the light absorption ions comprise Yb < 3 + >; the semiconductor material is of a heterojunction structure which is tightly formed by Co3O4 quantum dots and g-C3N4 nanosheets. The up-conversion nanoparticles are synthesized by adopting a simple hydrothermal method and are loaded on the g-CN nanosheets modified by the CoO quantum dots, and the obtained composite material can effectively convert near-infrared light into visible green light, so that generation of photocatalytic reaction species is increased, and the up-conversion nanoparticles are recycled and reused for multiple times without inactivation.

The invention belongs to the technical field of photocatalysts, and particularly discloses a CoMo6 / Fe3O4 (at) ZnO composite material and a preparation method and application thereof.The photocatalytic mechanism of the prepared CoMo6 / Fe3O4 (at) ZnO composite material is as follows: after the composite material CoMo6 / Fe3O4 (at) CeO2 is excited by light, photo-induced electrons on CoMo6 are transferred to the surface of Fe3O4 (at) ZnO, meanwhile, photo-induced holes absorb an electron donor H2O on the surface of POM polyanions to react to generate. OH, and the CoMo6 / Fe3O4 (at) ZnO composite material is obtained. The. OH free radical with strong oxidation capability oxidizes eosin B to generate oxidation products such as CO2 and the like. In the experiment, a small amount of electrons absorb an electron acceptor O2 and reduce the electron acceptor O2 to generate. O2 <->, and the two free radicals act at the same time to promote the photocatalytic reaction. When a magnetic field is added outside, the oxidation capacity and rate of. OH are also accelerated, so that the degradation rate of eosin B is improved; the highest degradation rate on an eosin B dye can reach 92.21%; after an external magnetic field is applied, the degradation rate is obviously accelerated, and the reaction is almost complete 40 minutes after illumination is started.

The invention provides a preparation method of an integrally-formed graphene micro-channel liquid cooling device. Compared with the prior art, the integrally-formed high-heat-conductivity graphene film is adopted as a micro-channel heat sink material, the compounding process of graphene and traditional metal copper, metal aluminum, silicon and other materials is avoided, and the advantage of high heat conductivity of graphene is fully played; and the graphene micro-channel is integrally formed through laser ablation of the pattern or mold imprinting, accurate machining of the complex micro-channel can be achieved, the process is simple, and the potential of large-scale production is achieved.

The invention discloses an MOF (Metal Organic Framework) derived NiS / ZnIn2S4 composite material and a preparation method and application thereof, the MOF derived NiS / ZnIn2S4 composite material is a rope grape-shaped material which is formed by compounding spiral ZnIn2S4 and NiS and has a coupling heterogeneous interface, NiS is prepared by taking Ni-MOF as a precursor through vulcanization and calcination; the spiral ZnIn2S4 is obtained by taking polyvinylpyrrolidone as a guiding agent and serine as a template through hydrothermal synthesis. The Ni-MOF of a microsphere structure is adopted as a precursor, richer active sites are provided for NiS, the hydrogen evolution rate is increased, a heterogeneous interface of a three-dimensional material constructed between NiS and ZnIn2S4 changes the transmission path of electrons, and the structure can remarkably enhance the photocatalytic hydrogen evolution reaction efficiency.

The invention relates to a photoelectrochemical urea degradation photoanode based on a bismuth vanadate semiconductor film and an electrode system thereof. The photoanode comprises a BiVO4 light absorption layer arranged on a transparent conductive substrate, a hole transport layer arranged on the BiVO4 light absorption layer and a Co-Ci cocatalyst layer arranged on the hole transport layer, the BiVO4 light absorption layer is excited by light to generate electron hole pairs, holes enter electrolyte under the combined action of extraction of the NiOBix hole transport layer and external bias voltage to carry out urea degradation half reaction, and meanwhile, the Co-Ci cocatalyst plays a role in improving surface reaction kinetics and reducing overpotential of urea oxidation reaction, so that the degradation efficiency of urea is improved. The photoanode has stronger carrier separation and migration capability and higher working stability, and the efficiency and stability of urea degradation are improved.

The present invention discloses a yeast peptide-hydroxytyrosol complex with high ROS capture ability and its preparation method and application. The yeast peptide-hydroxytyrosol complex contains hydroxytyrosol and yeast peptide, and the yeast peptide is a peptide with a molecular weight greater than or equal to 1kDa and less than 3kDa produced by hydrolysis of yeast protein; the preparation method of the yeast peptide-hydroxytyrosol complex with high ROS capture ability, the yeast peptide and hydroxytyrosol are dispersed in a low ionic strength PBS buffer respectively, and then the yeast peptide dispersion and the hydroxytyrosol dispersion are mixed; the application of the complex with high ROS capture ability in the manufacture of antioxidant drugs. The yeast peptide-hydroxytyrosol complex provided by the present invention has high ROS capture performance, has higher free radical and peroxide scavenging ability than using hydroxytyrosol or yeast peptide alone, and shows excellent application potential in the fields of food and medicine.

The present invention provides a method for synthesizing a nitrogen-doped tungsten trioxide complete photocatalyst for water splitting. Catalysts of different shapes are obtained within different ranges of the molar ratio of the tungsten precursor to hydroxylamine hydrochloride. The band structure of nitrogen-doped tungsten trioxide is regulated by adjusting the content of the N atom dopant, and the hierarchical structure morphology is controlled to increase the number of active sites and the diffusion and mass transfer capacity of water molecules. The synthesized four different types of nitrogen-doped tungsten trioxide complete photocatalysts for water splitting can effectively meet different requirements for the photocatalytic water splitting rate. Compared with the prior art, the method provided by the present invention significantly improves the solar energy to hydrogen (STH) conversion efficiency of the catalyst for complete photocatalytic water splitting, and the maximum conversion efficiency value can reach 3.8%, and reduces the cost of catalyst materials, which has practical significance for reducing the cost of green hydrogen production. The method provided by the present invention is suitable for large-scale preparation of complete photocatalytic water splitting catalysts.

The application discloses a kind of Pt nanoparticle load Fe-based MOF photocatalyst and its preparation method and application, belong to environmental energy technical field.The preparation method disclosed in the application uses 2-amino terephthalic acid, FeCl3·6H2O and aqueous solution of chloroplatinic acid hexahydrate as raw material, through hydrothermal reaction, Pt nanoparticle is dispersed in situ and loaded NH2-MIL-101 (Fe), reduces interface charge transfer resistance, inhibits the recombination of photo-generated carriers, to further improve the photocatalytic nitrogen fixation activity, using the synergistic effect of NH2-MIL-101 (Fe) composite photocatalyst containing Pt nanoparticle to achieve the purpose of improving the yield of photocatalytic conversion of nitrogen to ammonia, significantly solve the high energy consumption and environmental pollution problem of traditional industrial nitrogen fixation Haber-Bosch method.

The invention provides a solar cell and a photovoltaic module. The solar cell comprises a silicon substrate, a doped semiconductor layer, an anti-reflection layer and an electrode, the electrode comprises a seed layer and a transmission layer; the doped semiconductor layer is arranged on at least one surface of the silicon substrate; an anti-reflection layer is arranged in at least partial region of one side, deviating from the silicon substrate, of the doped semiconductor layer; the surface of the doped semiconductor layer comprises a target region without an anti-reflection layer; the seed layer is arranged on the side, away from the silicon substrate, of the doped semiconductor layer and at least covers the target area, and the transmission layer is arranged on the side, away from the doped semiconductor layer, of the seed layer; the height of the position in the edge region of the seed layer is greater than the height of the position, deviating from the edge region, in the seed layer. According to the design, the blocking effect of the seed layer on the transmission layer can be improved, and the electrical performance of the solar cell is ensured.

The invention relates to the technical field of nano composite materials, in particular to a preparation method of an In2O3 / ZnCdS / Pt composite material for photocatalytic hydrogen evolution, which comprises the following steps: preparing hollow rod-shaped In2O3 by using MIL-68 as a precursor, and then loading ZnCdS nanoparticles and Pt clusters on the hollow rod-shaped In2O3 to successfully prepare the In2O3 / ZnCdS / Pt composite material. The prepared In2O3 / ZnCdS / Pt composite material is applied to photocatalytic hydrogen production; the In2O3 / ZnCdS / Pt composite material prepared by the preparation method disclosed by the invention shows excellent performance when being applied to photocatalytic hydrogen evolution. Wherein In2O3 and Pt are used as double promoters, so that the photocatalytic activity is efficiently improved, and the recombination of electron-hole pairs is inhibited by the construction of heterojunction.

The invention discloses an organic light-emitting compound and an organic electroluminescent device thereof, the compound is used as a bipolar main body material, and an electron donor unit D (Donat), an electron acceptor unit A (Aceppt) and a large steric hindrance construction unit are introduced, so that the transmission of current carriers can be effectively balanced, excitons can be uniformly distributed, and the light-emitting efficiency is improved. The recombination of carriers at an interface is avoided, and the quenching of triplet state-triplet state under high exciton concentration is reduced, so that the performance and the stability of the device are improved.

The invention discloses a novel material for improving a perovskite film, a perovskite solar cell and a preparation method. The novel material is applied between an electron transport layer and a perovskite light absorption layer in a perovskite solar cell, the novel material is 1, 4-bis (3, 6-bis (4-(3, 6-dialkoxy-9H-carbazole-9-yl) phenyl)-9H-carbazole-9-yl) benzene, and two alkyl groups in the 3, 6-dialkoxy-9H-carbazole-9-yl) benzene can be the same or different. The novel material provided by the invention is arranged between an electron transport layer and a perovskite light absorption layer in a perovskite solar cell, and is beneficial to promoting formation of larger perovskite crystal grains and effectively reducing the surface roughness of the perovskite light absorption layer, so that the electron transport stability, the filling factor and the photoelectric conversion efficiency can be improved.

The invention discloses a Pt nanoparticle loaded Fe-based MOF photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of environmental energy. According to the preparation method disclosed by the invention, 2-aminoterephthalic acid, FeCl3. 6H2O and a chloroplatinic acid hexahydrate aqueous solution are adopted as raw materials, and Pt nanoparticles are dispersed and loaded on NH2-MIL-101 (Fe) in situ through a hydrothermal reaction, so that the interface charge transfer resistance is reduced, the recombination of photon-generated carriers is inhibited, and the photocatalytic nitrogen fixation activity is further improved; the purpose of improving the yield of ammonia synthesis through photocatalytic conversion of nitrogen is achieved through the synergistic effect of the NH2-MIL-101 (Fe) composite photocatalyst containing Pt nanoparticles, and the problems of high energy consumption and environmental pollution of a traditional industrial nitrogen fixation Hayer-Bosch method are remarkably solved.

The present invention discloses a pixel unit and a manufacturing method thereof and a display device, comprising a substrate, a pixel defining layer, a first electrode, an organic layer, and a second electrode; the pixel defining layer and the first electrode are located on one side of the substrate, and the pixel defining layer defines a pixel region; the organic layer is formed in the pixel region and is located on the first electrode; the second electrode is formed on the organic layer; the pixel defining layer comprises at least one groove; at least one oblique side of the groove comprises a first portion away from one side of the substrate and a second portion located between the first portion and the substrate, and the slope angle of the second portion is greater than the slope angle of the first portion. The present invention isolates the organic layers of adjacent pixel units by providing a groove on the pixel defining layer, and when the organic layer is evaporated, the organic layer is isolated in the groove, and is not easy to be covered in steps, that is, it is not easy to have a climbing effect, so as to prevent the carriers on the first electrode from moving to the non-pixel region, thereby preventing the positive charge from being recombined with the electrons in the non-pixel region.

The invention discloses a triethylamine sensor of a carnosine-perylene diimide supramolecular material constructed based on a self-assembly method and a preparation method and application of the triethylamine sensor in the field of organic semiconductor sensors, and a carnosine-perylene diimide derivative has hydrophilic and hydrophobic amphiphilic and donor-acceptor structures and molecular chirality, and can be used for preparing a triethylamine sensor of a carnosine-perylene diimide supramolecular material. The prepared self-assembly material is dripped on the surface of ITO glass, and a sensor is formed after drying, and the sensor has acute photoelectric responsiveness. The photoelectric sensor prepared from the supramolecular material constructed by a self-assembly method can detect trace triethylamine in a liquid environment, the detection limit is as low as 11.8 ppm, and the photoelectric sensor has the advantages of simple preparation process, good stability, high sensitivity and capability of detecting at room temperature, and is suitable for mass production.

The invention relates to the technical field of photoelectricity, in particular to a laminated solar cell and a preparation method thereof, a power generation device and a power utilization device. The laminated solar cell comprises a top cell, a bottom cell and a middle connecting layer arranged between the top cell and the bottom cell, the middle connecting layer comprises a transparent conductive oxide layer and a doped conductive oxide layer which are stacked, the transparent conductive oxide layer is arranged close to the bottom cell, and the doped conductive oxide layer is arranged close to the top cell; the doped conductive oxide layer is doped with a rare earth element.

This invention belongs to the field of nanocomposite material preparation and application technology, and discloses a method for preparing and applying a dendritic ternary SrCO3-TiO2 / CdS composite material. First, SrCO3-TiO2 nanoparticles are synthesized using a simple hydrothermal one-pot method with tetrabutyl titanate and Sr(NO3)2 as raw materials. These nanoparticles are then dispersed in deionized water to form a suspension. Finally, a dendritic ternary SrCO3-TiO2 / CdS composite material is prepared using an in-situ hydrothermal growth method. The dendritic ternary SrCO3-TiO2 / CdS composite material prepared by this invention can be used to produce hydrogen peroxide under visible light and simultaneously degrade oxytetracycline. The dendritic ternary SrCO3-TiO2 / CdS composite material prepared by this invention forms a unique dendritic structure by combining SrCO3-TiO2 composite particles with CdS. By utilizing the synergistic effect among the three, the transport and separation of photogenerated electron pairs at the interface are accelerated, and their recombination is effectively inhibited, thereby improving the catalytic activity of the dendritic ternary SrCO3-TiO2 / CdS composite material. It has broad application prospects in the synthesis of green chemicals and water pollution treatment.

The invention provides a conjugated coordination polymer / ionic liquid composite material and a preparation method and application thereof.The preparation method comprises the steps that metal salt, ligand and ionic liquid serve as reactant raw materials and are ultrasonically dispersed in water respectively and mixed to be uniform to obtain a reaction precursor, then ammonia water is added to promote coordination of nickel salt and ligand to obtain a conjugated coordination polymer, and the conjugated coordination polymer / ionic liquid composite material is obtained; strong electron interaction is formed between the ionic liquid and the conjugated coordination polymer, and finally the conjugated coordination polymer / ionic liquid composite material is obtained. The positive ions of the ionic liquid in the obtained composite material are dispersed, mixed and tightly combined with the conjugated coordination polymer, so that the construction of a hydrophobic surface microenvironment can be realized, and the electrocatalytic activity and the selectivity of the hydrophobic surface microenvironment are improved.

The utility model provides a door and window connecting structure. The door and window connecting structure comprises a decoration assembly, a window frame and an installation assembly. A first inserting block is arranged on the window frame; the decoration assembly is mounted on the mounting assembly, a first opening is formed in the mounting assembly, and a first clamping part and a second clamping part are arranged on the mounting assembly; the first inserting block is inserted into the first opening, the first clamping part and the second clamping part are both connected with the first inserting block in a clamped mode, and the mounting assembly, the first clamping part and the second clamping part are matched to be used for fixing the first inserting block. The problems that a traditional aluminum-wood combined door and window is high in cost, poor in installation effect and the like are solved.

The present invention discloses a method for preparing a cadmium telluride detector with separated electron and hole transmission channels, comprising: providing a substrate, coating a photoresist mask layer on both sides of the substrate; providing a mask plate, the mask plate having an exposure window, using the exposure window to expose the to-be-doped region on both sides of the substrate; injecting doping ions into the to-be-doped regions on both sides of the substrate by an ion implantation device, so as to construct an N-type electron transmission channel in the substrate, forming a periodic PN structure. The present invention constructs an N-type electron transmission channel that penetrates both sides in a P-type cadmium telluride crystal by a double-sided ion implantation method, so that the transmission of electrons and the transmission of holes are separated in space, so as to effectively avoid the problem of carrier recombination, weaken the influence of carrier recombination and hole tailing effect on the attenuation constant, and improve the image quality of the detector.

The invention discloses a SmVO4 / HMOR composite photocatalytic material and a preparation method and application thereof.The preparation method comprises the steps that samarium oxide is put into a beaker, a nitric acid solution is added in the stirring state, samarium nitrate mixed liquor is obtained after the samarium oxide is dissolved through heating, the samarium nitrate mixed liquor is dried, and Sm (NO3) 36H2O is obtained; the preparation method comprises the following steps: mixing a Sm (NO3) 36H2O aqueous solution with hydrogen mordenite, stirring at 80 DEG C for 60 minutes, adding an NH4VO3 solution to form a reaction solution, adjusting the pH value of the reaction solution to 7 by using ammonia water, reacting for 2 hours, filtering, taking a solid, and calcining for 2 hours to obtain the SmVO4 / HMOR composite photocatalytic material. According to the invention, highly dispersed SmVO4 nanoparticles are prepared on the surface of HMOR through a precipitation method, and the SmVO4 / HMOR composite photocatalytic material with high photocatalytic activity is synthesized; the HMOR serving as the carrier solves the problem of agglomeration of the SmVO4 nano-particles, the HMOR serving as the carrier has excellent supporting performance and stability, the SmVO4 nano-particles are kept firm on the surface of the HMOR, and the prepared photocatalytic material has cycling stability.

The invention discloses a preparation method of a silicon carbide MOSFET device, and relates to the technical field of semiconductors. Comprising an N + Sub layer, an N-Drift layer, an N + region with the doping concentration of 1E17-5E18cm <-2 >, a CSL layer, a gate oxide layer, a Poly layer, an isolation dielectric layer and a front electrode metal layer which are sequentially arranged from bottom to top, a plurality of P + regions extending downwards are arranged on the top surface of the N + region; the doping concentration of the P + region is 3E17-1E19cm <-2 >; a heavily-doped N + region and a heavily-doped P + region are formed at the bottom of a P-body region in a planar gate SiC MOSFET, so that a hole of a parasitic PN junction body diode is cut off in the N + region in the middle of the P + region in the follow current process of the device and cannot move to a Drift layer, thereby preventing the hole from being compounded with electrons of the Drift layer, reducing the bipolar degradation effect, and improving the long-term stable use of the device.

The invention discloses a zeolite-based photocatalytic material with cadmium sulfide nanoflowers and nanoparticles coexisting on the surface and a preparation method and application thereof.The preparation method includes the steps that HMOR serves as a carrier, CdS nanoparticles grow on HMOR zeolite, growth and distribution of the CdS nanoparticles of two phase structures on the surfaces of the HMOR zeolite are achieved under the action of an HMOR electric field, the content of ammonia water in a system is controlled, and the photocatalytic material is prepared. Cadmium ions and a sulfur source react on the surface of HMOR, the zeolite-based photocatalytic material with cadmium sulfide nanoflowers and nanoparticles coexisting on the surface is prepared, phase heterojunctions between cubic-phase CdS and hexagonal-phase CdS can effectively promote separation of photo-induced electron-hole pairs, the CdS nanoparticles and HMOR can generate a synergistic effect, methylene blue is subjected to photocatalytic degradation, and the photocatalytic effect is good. The removal efficiency of methylene blue is improved. HMOR is used as an electron acceptor, can accelerate the transfer efficiency of photoelectrons, inhibit the recombination of charges and improve the photocatalytic efficiency, and has good environmental protection benefits and economic benefits.

The invention belongs to the field of discharge synergistic catalysts for waste gas treatment, and provides a catalyst for plasma synergistic catalytic degradation of organic waste gas and a preparation method of the catalyst. According to the present invention, the strontium titanate is adopted as the high dielectric constant material substrate, and the bismuth vanadate is introduced to improve the overall catalytic effect, such that the organic waste gas is not completely decomposed, and the part of the product is subjected to the polymerization reaction on the catalyst surface so as to form the carbon deposition catalyst, and the catalyst use efficiency is reduced; the surface plasma resonance effect is enhanced through photodeposition of silver nanoparticles; strong oxidizing species in the photocatalysis process can effectively decompose carbon deposition, the service life of the catalyst is prolonged, meanwhile, due to the high dielectric constant of SrTiO3 and the electric field enhancement effect of BiVO4, the synergistic effect between photocatalysis and plasma catalysis is more remarkable, and the overall catalysis efficiency is improved.

The invention discloses a CeO2 / ZnMn2O4Z type heterojunction photocatalyst as well as a preparation method and application of the CeO2 / ZnMn2O4Z type heterojunction photocatalyst. The CeO2 / ZnMn2O4 Z type heterojunction photocatalyst is prepared from CeO2 and ZnMn2O4, wherein the mass ratio of the CeO2 to the ZnMn2O4 is (0.25 to 1) to 1. The CeO2 / ZnMn2O4Z type heterojunction photocatalyst is prepared by the following two steps: firstly, preparing long-strip-shaped ZnMn2O4 by adopting a coprecipitation-calcination method, then adding a cerous nitrate solution to uniformly disperse the long-strip-shaped ZnMn2O4, obtaining a precipitate mixture under the precipitation action of ammonia water, and finally performing pyrolysis to obtain the CeO2 / ZnMn2O4Z type heterojunction photocatalyst. The catalyst is provided with a Z-type heterojunction, separation of photon-generated carriers is promoted, the recombination process of the photon-generated carriers is effectively inhibited, and the catalyst has high photocatalytic degradation efficiency and reaction stability on tannic acid under simulated sunlight illumination.

The invention discloses a CAU-17 / BiOBr composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: by taking CAU-17 as a matrix, adding a Bi < 3 + > source, enabling Bi < 3 + > to be uniformly adsorbed on the surface of the CAU-17, then adding a Br source, enabling generated BiOBr to grow on the CAU-17 in situ through solvothermal reaction, and fixing the BiOBr on a framework of the CAU-17, so as to obtain the CAU-17 / BiOBr composite photocatalyst. The structure of the catalyst is a nanorod-shaped structure, and a CAU-17 nanorod is uniformly coated with a BiOBr nanosheet. The preparation method of the catalyst comprises the following steps: (1) preparing CAU-17; and (2) preparation of the CAU-17 / BiOBr. In the prepared catalyst, CAU-17 is in close contact with a BiOBr interface, separation of photo-induced electron-hole pairs on the interface is accelerated, and the specific surface area is increased, so that recombination of carriers at the interface due to non-close contact of a heterogeneous interface is overcome, and the photocatalytic activity of degrading organic dye is remarkably enhanced; the photocatalyst has good photocatalytic degradation capability on RhB and CIP, and the removal rates of the RhB and the CIP are 99.44% and 97.46% respectively.

The invention discloses a composite heterojunction photocatalytic coating as well as a preparation method and application thereof, and relates to the technical field of environment-friendly coatings for buildings. According to the composite heterojunction photocatalytic coating and the preparation method and application thereof, BiOC1 generates rich surface oxygen vacancies under light induction, impurity energy levels can be formed in band gaps, the visible light absorption capacity is promoted, photo-induced electrons can be captured and promoted to be transferred to the surface of a photocatalyst, and therefore photon-generated carrier recombination is inhibited, and the photocatalytic performance of the photocatalyst is improved. Meanwhile, surface oxygen vacancies generated by light induction can efficiently promote hole (h < + >) oxidation and generate more active species such as superoxide free radicals O < 2-> to promote degradation of organic pollutants, and heterojunction is constructed by using Cu0, so that the light absorption range of BiOCl can be widened, the photocatalytic efficiency of the catalyst is further improved, and the formaldehyde degradation performance of the coating is improved.

The application relates to the technical field of semiconductor photoelectric devices, and particularly relates to a nanocrystal detection chip capable of perceiving multi-spectrum (covering 300 nm-15 mu m). By adopting a solution processing type nanocrystal thin film, rigid dependence on expensive single crystal infrared epitaxial wafers such as indium gallium arsenide (InGaAs) and indium antimony arsenide (InAsSb) of a traditional infrared detector is effectively broken, a patterned nanocrystal filter layer is prepared on an independent transparent optical substrate, a multi-band spectral modulation array is constructed through multiple photoetchings, and high-precision vertical heterojunction integration is realized with a bottom photoreceptive pixel. By utilizing the band tunable characteristics of nanocrystal materials, the physical band gap limitation of a traditional silicon-based sensor is broken, and full-spectrum photoelectric detection response from ultraviolet, visible light to medium-long wave infrared (300 nm-15 mu m) is realized. The application forms an in-situ physical barrier through a vertical heterojunction integration structure, and at the same time of completing micron-level spectral spectral modulation, reliable physical isolation and chemical protection are provided for the fragile nanocrystal active layer.

The present invention belongs to the field of perovskite quantum dots, and relates to a method for preparing a composite material of perovskite quantum dots / precious metal nanoparticles. The composite material has good photocatalytic activity and can degrade about 69% of Sudan III within 5 hours. It can be used as a new photocatalyst for degrading Sudan III. The synthesis method proposed by the present invention is to first reduce AuX on the surface of CsX nanoparticles, the precursor of perovskite quantum dots, so as to deposit Au, and then react CsX with Pb(OA)2 to generate a perovskite quantum dot / Au composite material. The traditional method is to first synthesize perovskite quantum dots and then deposit Au. The method proposed by the present invention can avoid the perovskite quantum dots and Au caused by the traditional method. + ions and avoid the production of by-products (such as Cs2Au2Br6), which is of great significance for the synthesis and photocatalytic applications of quantum dots.