77results about How to "Suitable for large area preparation" patented technology

The invention discloses perovskite solar cell conductive carbon paste which comprises organic solvents, binders and conductive filling materials. The conductive carbon paste further comprises inorganic additives. The inorganic additives are ZrO2 or NiO powder. By mass percent, the conductive carbon paste comprises 6%-15% of binders, 14%-20% of conductive filling materials and 3%-5% of inorganic additives. The invention further discloses a carbon counter electrode for a perovskite solar cell. The carbon counter electrode is prepared and acquired by adopting the above-mentioned conductive carbon paste in a screen printing means. The invention further discloses the perovskite solar cell comprising the above-mentioned carbon counter electrode. A method of preparing the conductive carbon paste is further disclosed. The conductive carbon paste which does not make a perovskite film corroded further increases the photoelectric conversion efficiency.

The invention discloses a flexible pressure-temperature integrated film array sensor sensitive element and a preparation method thereof. The pressure sensing function and the temperature sensing function are integrated by utilizing a piezoelectric effect and a pyroelectric effect of a flexible ferroelectric film, and the sensitive element comprises a flexible substrate, a functional film assemblyand a thermal management film assembly. In the method, an insulating layer and a lower electrode are sequentially deposited on a flexible substrate, a wire is connected, a flexible ferroelectric thinfilm is deposited and an insulating groove is etched, an upper electrode is deposited on the flexible ferroelectric thin film, the wire is connected, a thermal control layer, a thermal conductive layer and an infrared reflective layer are sequentially deposited, and finally the sensitive element is polarized and tested through the wire. The sensitive element of the invention realizes the integration of the pressure sensing function and the temperature sensing function on a single sensitive element, and has high integration level and simple use structure, is suitable for large-area preparation,suitable for plane, curved surface, special-shaped surface and other structures, high adaptability, and has the advantages of shock resistance, strong vibration ability, high bionic degree, high reliability and the like.

The invention provides a method for preparing a graphene oxide sensor. The method comprises the following specific steps: (1) dispersing graphene oxide in a solvent, and forming stable graphene oxide dispersion liquid; (2) performing surface functionalization treatment on a metal nanowire material; (3) adding the metal nanowire subjected to surface functionalization treatment in the step (2) into the graphene oxide dispersion liquid in the step (1), uniformly mixing so as to form a mixed solution of graphene oxide and metal nanowire; (4) carrying out stirring reaction on the mixed solution in the step (3) at the temperature of 30-200 DEG C for 1-300 minutes so as to form a graphene oxide coated metal nanowire structure, wherein a continuous current path is not formed between the metal nanowires; and (5) by taking the graphene oxide coated metal nanowire structure in the step (4) as a sensitive material of the sensor, preparing the graphene oxide sensor. The method contributes to improving the sensing characteristics of the device.

The invention discloses a method for preparing a super-hydrophobic surface with an ultra-critical CO2 rapid expansion method. The method comprises the following steps of: activating nano-silica with hydrochloric acid, filtering, drying, adding absolute ethanol, adding distilled water, adding two kinds of coupling agents containing fluorine and double bonds, washing a product, filtering and dryingto obtain nano-silica particles containing double bonds; adding the nano-silica particles containing double bonds into an ultra-critical CO2 reaction kettle, stirring, and spraying onto a water-basedpolyurethane paint surface which is end-capped with double bonds and is added with an initiator; and drying, grafting the nano-silica particles onto a polyurethane coating surface to form a stable structure to obtain a super-hydrophobic surface. A process used in the method is environmentally-friendly, the ultra-critical CO2 is a nontoxic, non-flammable and environmentally-friendly solvent, the solvent which quickly expands in a fluid and solute particles are easy to separate rapidly and completely, and no solvent is left in the particles; and the preparation efficiency is high, the method issuitable for large-area preparation, and high film coating stability and high scratch resistance are achieved.

The invention relates to a ZnSe nanowire and a preparation method and an application thereof. The ZnSe nanowire is grown along the crystal orientation of the <100>. The ZnSe nanowire is provided with a sphalerite structure, the average diameter is 20 nm-80 nm, the length is 0.5 [mu]m-10 [mu]m, the size is uniform, the crystallinity is good, and the ZnSe nanowire has no structural defects such as a stacking fault. According to the ZnSe nanowire and the preparation method and the application thereof, ZnSe powder servers as pre-reaction materials, gold serves as a catalyst, and the ZnSe nanowire growing is obtained through growth on FTO conductive glass or a SnO2 single crystal substrate by a chemical vapor deposition method. The nanowire can be used for constructing solar batteries, photodetectors, nanometer lasers and the like, performance is especially good in the aspect of hydrogen production through solar photoelectrocatalysis decomposition of water, and good application prospects are achieved.

The invention discloses a preparation method of an Al-Doped ZnO film, which comprises the following steps of: adding AZO nano particles in a medium; ultrasonically processing a solution for 10-30 minutes to obtain uniform and dispersive nano particle seriflux; adding a coupling agent and a photoinitiator in the seriflux; after adding the coupling agent, carrying out ultrasonic treatment for 0.5-8 hours; spreading AZO nano particle seriflux on glass by using a pulling method or a spinning method and irradiating by ultraviolet light; and then carrying out heat treatment to obtain the ZAO film. The invention does not need vacuum equipment or high temperature, has simple structure, and is suitable for large-scale production.

The invention discloses a fluoropolymer/nano SiO2 superhydrophobic coating layer and a preparation method thereof. The preparation of the superhydrophobic coating layer includes the following steps: (1) adding trifluoroethyl methacrylate and perfluoroalkylethyl acrylate into a solvent a according to the molar ratio of 1:0.01-1:100; with azodiisobutyronitrile as an initiator, carrying out free radical solution polymerization; and repeatedly dissolving and precipitating the polymer prepared from the reaction, and then drying, to obtain a fluoropolymer; (2) dissolving the fluoropolymer in a solvent b, to obtain a polymer solution; adding nano SiO2 into the polymer solution, making the content of the nano SiO2 be 1-10 wt%, carrying out ultrasonic treatment, spin-coating on a substrate, and drying to form the superhydrophobic coating layer. The preparation method of the fluoropolymer/nano SiO2 superhydrophobic coating layer is simple, and is suitable for large area preparation; and the prepared superhydrophobic coating layer has the advantages of high interfacial strength, good thermal stability and strong corrosion resistance, and has a broad application prospect.

The invention provides a method for preparing a vanadic oxide film growing along c-axis with simple equipment and process. The method comprises the following steps: (1) preparing sol by using vanadyl acetylacetonate as a raw material; (2) forming a film on a cleaned substrate material by using the sol as coating solution and by using a pulling coating method or a spin coating method; and (3) carrying out thermal treatment in an oxygen-containing atmosphere. The method has the advantages of simple process, large-area preparation, low preparation cost and the like. The prepared vanadic oxide film growing along c-axis has single orientation, contributes to the insertion and extraction of ions and can improve the performance of the cathode of a lithium ion battery and an electrochromic device.

The invention relates to an inclined U-shaped chiral structure and a preparation method thereof, in particular to the field of micro-nano photonics structures. The structure comprises a substrate anda plurality of chiral units periodically arranged on the substrate, each chiral unit comprises a first rectangular strip, a second rectangular strip, a third rectangular strip and a protruding part, the first rectangular strip, the second rectangular strip and the third rectangular strip form a U-shaped structure, and the protruding part is arranged on the side, away from the substrate, of the third rectangular strip. Under the excitation of incident circular polarized light, a combined dipole is formed on the protruding part and the third rectangular strip, and due to the fact that the dipoleis not parallel to the oscillation path of the dipole on the first rectangular strip and the oscillation path of the dipole on the second rectangular strip, the phase difference between structures iscaused, the phase difference between the dipoles of the structure can be changed by flexibly controlling the thickness and the shape of the protruding part, so that a flexible and controllable chiralsignal is generated, and a new mechanism is provided for the generation of the chiral signal.

The invention discloses a visual self-driven ultraviolet photoelectric detector and a preparation method thereof. The visual self-driven ultraviolet photoelectric detector is composed of a titanium dioxide nanotube array with the titanium sheet acting as the substrate, potassium chloride electrolyte and Prussian blue with FTO conductive glass acting as the substrate. In the system, the titanium dioxide nanotube array acts as a photo-anode and the Prussian blue film acts as a counter electrode. The Prussian blue has excellent optical modulation characteristic so that the Prussian blue electrode can be used as an electrochromic display screen to realize visualization for ultraviolet light detection. Compared with the conventional ultraviolet light detector, the visual self-driven ultraviolet photoelectric detector has the advantages that (1) naked-eye visualization can be realized; (2) the detector is self-driven without external bias voltage; (3) the response time is short; (4) the sensitivity is high; and (5) the preparation cost is low, the technology is simple and the environment is friendly.

The invention provides a super-hydrophobic surface with a self-driven water collection function and a preparation method thereof. According to the preparation method, microspheres with micron sizes are assembled into a single-layer microsphere array, gaps of the single-layer microsphere array are filled with magnetic nanoparticles, and a binary assembly template is formed; under the action of an external magnetic field, resin is sprayed on the surface of the binary assembly template, so that the resin mixed with the magnetic nanoparticles directionally grows into columnar microarray structures; and lubricating liquid is infiltrated into gaps of the columnar microarray structures, and the super-hydrophobic surface with the self-driven water collection function is formed. By means of the mode, the magnetic nanoparticles can be regularly arranged by utilizing the single-layer microsphere array, so that the resin is driven to directionally grow into the columnar microarray structures whichare independent of each other and are regularly and orderly arranged; and liquid drops in the air are spontaneously gathered, fused and bounced by utilizing the synergistic effect between the capillary effect difference generated by the distance between adjacent columnar structures in the columnar microarray and the lubricating liquid, so that a self-driven water collection function is realized.

The invention relates to a firework-shaped nano-ZnO photocatalyst prepared based on a one-step calcination method and a method thereof. An existing micron-grade bar-shaped ZnO preparation technology is rigor and complex in condition, the purity of products is low, the performance is poor, or high-purity metal zinc is adopted as raw materials, and the cost is high. According to the firework-shaped nano-ZnO photocatalyst based on the one-step calcination method and the method thereof, zinc acetate dehydrate is placed in a ceramic crucible at the volume ratio of (1-3):60, then the ceramic crucible is covered with a crucible cover and is placed in a furnace chamber of a box type resistance furnace, heating calcination is conducted, the temperature is gradually reduced to the indoor temperature, and then firework-shaped nano-ZnO self-assembled by nano-bars with the length of 1-8 micrometer and the diameter of 10-80 nm is formed on the crucible wall. According to the firework-shaped nano-ZnO photocatalyst prepared based on the one-step calcination method and the method thereof, the zinc acetate dehydrate serves as a zinc source, the one-step calcination method is adopted to obtain the firework-shaped nano-ZnO photocatalyst which is low in cost, uniform in size and good in photocatalytic activity under the action of visible light, the purity of products is high, the preparation system is stable, the method is suitable for large-area preparation, and technical supports are provided for industrially producing the high-purity nano-ZnO photocatalyst.

The invention relates to a directional emission organic semiconductor light emitting diode array based on metal nano electrodes and preparation thereof, and belongs to the technical field organic optoelectronics and nanophotonics. On a glass substrate, a photoresist nano grating is utilized to serve as a template, nano-scale organic light emitting diodes parallel to the located inclined planes areprepared on the inclined planes at the same side of each convex grid line of the nano grating, and the nano-scale organic light emitting diode includes an anode layer Au, a hole transport layer PEDOT: PSS, an organic light emitting layer F8BT film, an electron transport layer LiF and a cathode Al which are sequentially laminated outward from the side surface of the convex grid line. The inclinedorganic light emitting diodes are formed on the nano grating structure, and all of the organic light emitting diodes form an array structure. The device achieves the working mode of end emission and obtains the directional emission nano OLED (Organic Light Emitting Diode) array.

The invention discloses a photoelectric detector for a paper-based material and a solution method for preparing the photoelectric detector. The near ultraviolet light detector based on the SnO2: Si/SnO2: Ga homojunction structure is prepared through a solution method. The prepared SnO2: Si thin film and SnO2: Ga thin film both show a strong absorption effect on near ultraviolet light concentratednear 410 nm. When the detector is converted from a dark environment to a near ultraviolet irradiation environment, the current of the detector is greatly converted, the current is increased by two orders of magnitudes, and excellent near ultraviolet sensitivity is shown. Meanwhile, tests find that the detector has weak response to red light concentrated near 630 nm and yellow light distributed at550-700 nm, the response current can be ignored compared with the current under purple light irradiation, and the detector shows good anti-interference performance. The method has advantages and potential in application of photoelectric detectors (money counters and the like) made of paper-based materials.

The invention discloses a color carbon fiber thermal management device with structural color gradient and a preparation method, and belongs to the field of color thermal management devices. The structural color carbon fiber material is composed of a carbon fiber material serving as an inner core and a one-dimensional photonic crystal film which wraps the surface of the carbon fiber material and has a gradient structure. By controlling the thickness of a sputtered film layer, the structural color carbon fiber cloth with different colors such as blue, green, orange and purple red is obtained. The columnar structure of the carbon fiber material and the property of directional deposition of sputtering on the curved surface of the carbon fiber generate periodic gradient of a photonic structure,so that gradient-changing structural color is provided. The carbon fiber material has good electrical conductivity and thermal conductivity, so that the carbon fiber material has the characteristic of low-voltage driving electric heating, the temperature of a heater can reach about 52 DEG C at a low voltage of 2.5 V, and the carbon fiber material has good cycling thermal stability. Therefore, thedevice can be greatly applied to the field of color flexible fabric thermal management.

The invention belongs to the technical field of super hydrophobic material preparation, and relates to low-density polyethylene super hydrophobic sheets/containers with controllable rolling angle and a preparation method thereof. The preparation method comprises the steps: firstly, carrying out mold pressing of low-density polyethylene granules into 10 [mu]m-2 cm low-density polyethylene sheets by a plate vulcanizing machine; overlaying 2-4 low-density polyethylene sheets together in a mold with the plate vulcanizing machine; then cooling the together-overlaid low-density polyethylene sheets to room temperature, or transferring to a curved-surface mold to be laminated with the curved-surface mold and then cooling to room temperature, stripping the together-overlaid low-density polyethylene sheets better with hands, an iron tong or a universal testing machine, and thus obtaining the low-density polyethylene super hydrophobic sheets/containers. The method is simple and feasible, scientific in principle, simple to operate, low in preparation cost and friendly to environment; and the prepared super hydrophobic sheets/containers have quite high water contact angle and have controllable rolling angle.

The invention belongs to the technical field of super-hydrophobic material preparation and relates to a preparation method of a polypropylene super-hydrophobic surface with the rolling angle controllable. The preparation method comprises the steps that a polypropylene aggregate mold is pressed into polypropylene sheets with the thickness being 10 micrometers to 2 centimeters through a press vulcanizer; 2-4 layers of the polypropylene sheets are stacked and pressed together in a die through the press vulcanizer; then the stacked and pressed polypropylene sheets are cooled to indoor temperature or transferred onto a curved die and attached to the curved die and then cooled to the indoor temperature; and finally the stacked and pressed polypropylene sheets are stripped by hands, pincers or a universal testing machine, and the polypropylene super-hydrophobic surface with the rolling angle controllable is obtained. The method is simple and feasible, the principle is scientific, the operation is easy and convenient, the preparation cost is low, the environmental friendliness is achieved, the prepared super-hydrophobic sheets and a container are quite high in contact angle, and the rolling angle is controllable.

The invention discloses a preparing device of a carbon nano tube thin film and a method. The device comprises a container main body (1), a buffering clapboard (4) and a solvent guiding-out part (5), wherein the buffering clapboard (4) is located at the lower portion of the container main body (1), and the solvent guiding-out part (5) is communicated with the interior of the container main body (1)through a through hole in the side wall of the container main body (1) and extends to the outside of the container main body (1). Meanwhile, the invention discloses the method for adopting the devicefor preparing the sequentially-arranged carbon nano tube thin film. By means of the device and the method, the liquid level descending speed can be controlled by controlling the length of a semipermeable pipeline, and thus the self-assembly speed of carbon nano tubes on the surface of a matrix is controlled. The preparing device and the method have the advantages that the liquid level descends steadily, the structure is simple, the cost is low, and the carbon nano tube thin film is suitable for large-area preparation.

The invention discloses a method for a carbon nanotube film. The method comprises the steps that a dispersant is added to a carbon nanotube solution and dispersed, and then a tackifier is added therein; sufficient stirring and dispersion are carried out; and acquired printing paste is loaded into a print head ink cartridge. The printing paste is added to the print ink cartridge, and then a print head is moved along a substrate. The moving direction of the print head is parallel to the substrate. The substrate is dried under vacuum. The film prepared by the method is uniform, and a large-areafilm can be prepared.

The invention relates to an electrochemical driving type color-changing and deformation double-response actuator and a preparation method thereof. The actuator takes polyvinylidene fluoride gel electrolyte containing lithium salt as a middle layer, and color-changing and deformation double-network structure films are arranged on the two sides of the middle layer; wherein the color-changing deformation double-network structure thin film is a single-wall carbon nanotube conducting layer loaded with a vanadium pentoxide nanowire. The compound has good optical performance and actuating performance, and is high in conversion rate and good in flexibility, so that the compound has wide application prospects in the fields of sensing, anti-counterfeiting, fabric display, camouflage and even military industry.

The invention discloses a hybrid solar cell based on the integration of multiple heterojunction properties and a preparation method thereof, A solar cell comprises an organic blend heterojunction filmcomposed of an anode, a TiO2 nano-structure film and a CdS nano-structure film, an organic conjugated polymer and an organic conjugated small molecule, an inorganic hole transport layer and a cathodedeposited on a glass substrate in this order. As that battery of the invention realize the inorganic flat-plate heterojunction, the performance integration of hybrid plate heterojunction and organicheterojunction, It overcomes the bottleneck of hybrid solar cells composed of TiO2 nanostructured thin films and pure organic conjugated polymers, has laminated structure, simple preparation method ofkey materials and devices, low equipment requirements, and is very suitable for large-scale preparation. the hybrid solar cell has great application value in the field of low-cost thin film solar cells.

The invention provides a radiation refrigeration surface based on a fiber array and a preparation method and application of the radiation refrigeration surface. The radiation refrigeration surface based on the fiber array comprises a bottom adhesive layer and a top fiber array structure. And the bottom adhesive layer is prepared from the following raw materials: a polymer matrix, inorganic filler particles and a curing agent. The radiation refrigeration surface based on the fiber array provided by the invention has a series of advantages of high sunlight reflectivity, high mid-infrared emissivity, strong adhesive force with a substrate and the like, and has excellent radiation refrigeration performance. The radiation refrigeration surface based on the fiber array can be used for building outer walls, thermal control mechanisms and the like to adjust the internal temperature of the building outer walls, the thermal control mechanisms and the like. In addition, the radiation refrigeration surface based on the fiber array is simple in preparation process, low in cost and suitable for large-area production and preparation.