63results about How to "Increase light absorption area" patented technology

The invention discloses a solar-grade silicon wafer being cut by a diamond wire and a cutting method thereof. A mono-crystalline silicon square rod is cut by a diamond wire. The cutting method comprises the following steps that: the mono-crystalline silicon square rod which is formed by squaring, grinding and sharpening a mono-crystalline silicon circular rod, the mono-crystalline silicon square rod is fixed on a resin strip through an adhesive bar, the resin strip is fixed on an adhesive plate, then the adhesive plate and the mono-crystalline silicon square rod are collectively placed into a working cabin to be preheated, cutting liquid is circulated in the working cabin to work, then the diamond cutting is performed, the cut mono-crystalline silicon wafer is inversely arranged on a degumming device to degum, and the mono-crystalline silicon wafer is washed by ultrasonic and then is centrifugally dehydrated. Due to the adoption of the cutting method, the photoelectric conversion efficiency and the cutting efficiency of the mono-crystalline silicon wafer can be improved, a silicon wafer with the thickness of 140 to 200 micrometers can be produced, the qualification rate of the product can reach more than 98 percent; and silicon powder is recyclable, so valuable silicon resource can be saved, and the environment-friendly production can be really realized during the production process.

The invention relates to a preparation method of a material, specifically to a preparation method of a seawater desalination material based on polyurethane foam. The invention aims to solve the problem of low desalination efficiency of seawater desalination material prepared by utilizing conventional photothermal conversion methods. The preparation method comprises the following steps: 1, preparing an ammonium persulfate solution and an aniline solution; 2, preparing polyaniline powder; 3, preparing a polyaniline solution; 4, preparing a polyvinyl alcohol solution; 5, preparing a crude productof the seawater desalination material based on the polyurethane foam; and 6, carrying out optimization treatment to obtain the seawater desalination material based on the polyurethane foam. The prepared seawater desalination material can fully utilize the pore diameter structure of a polyurethane foam material and the nano-channel of a polyvinyl alcohol gel, effectively reduces latent heat of evaporation of water, and greatly improves sea water desalination efficiency. The seawater desalination material has a high seawater evaporation rate (2.0 kg/m<2>/h) and high desalination efficiency (99.9%), which is increased by 25% compared with traditional photothermal conversion seawater desalination materials.

The invention provides an array substrate, a manufacturing method of the array substrate, a flat panel detector and an imaging device, and relates to the field of photoelectric technology. The influence of manufacturing process of a photoelectric converter on the TFT performance can be reduced. The array substrate comprises a substrate, a plurality of low-temperature polycrystalline silicon TFT arranged on the substrate in an array, and a photoelectric converter connected with source electrodes or drain electrodes of the TFT, wherein the source electrode or the drain electrode of each TFT comprises a first conducting layer close to one side of the photoelectric converter, and the material constituting the first conducting layer is corrosion resistant in a composition process of the photoelectric converter. The array substrate is used for preparing the flat panel detector.

The invention relates to an aluminum-plastic solar heat collector. A shell is enclosed into a flat box body by a hollow frame, a transparent cover plate positioned at a light-receiving surface and connected with the hollow frame and a bottom plate positioned at the backlight surface and connected with the hollow frame, wherein the transparent cover plate is one to two layers of polycarbonate membrane; the inner core of the hollow frame is hidden with a water transmission pipeline along the length direction; the water transmission pipeline is communicated with a heat absorbing pipe in the shelland a water inlet and a water outlet at the side surface of the hollow frame; the heat absorbing pipes are a row of parallel aluminium alloy pipes, the cross section thereof are shaped as an ellipseand the long shaft thereof is parallel to the transparent cover plate; the heat absorbing pipe is externally wrapped with an aluminium foil coated with a selective heat absorbing coating; and the twoends of the heat absorbing pipe are respectively communicated with the water transmission pipeline of the hollow frame. The aluminum-plastic solar heat collector solves the technical problems that thetraditional solar heat collector has high cost and undesirable heat efficiency, is hard to be fused with the building structure and the building shape and has influence to large-scale application.

The invention provides a high-performance foam metal-based photothermal conversion film, a preparation method thereof and a double-layer evaporation structure for solar steam generation. The high-performance foam metal-based photothermal conversion film is a CuO@CF or CuO/Ag@CF photothermal conversion film, the CuO@CF or CuO/Ag@CF photothermal conversion film and melamine foam form the double-layer evaporation structure for solar steam generation, then downward conduction heat loss from a solar absorber to underlying water occurring in a single layer evaporation system is reduced, and evaporation efficiency is further improved; and compared with a traditional pure noble metal material film, the CuO/Ag@CF photothermal conversion film has lower cost.

The invention discloses a method for the surface regulation of a silicon material for solar cells. In the method, photoetching and mask film technology and alkaline wet-method corrosion technology are combined, a layer of mask film is deposited on the surface of silicon before the alkaline wet-method corrosion of the surface of the silicon, and the film layer on the surface of the silicon is patterned by a mask film pattern to make the corrosion of the surface of the silicon selectable and controllable. While performing the alkaline wet-method corrosion of the surface of the silicon to increase the light absorption area of the surface of the silicon, the method ensures the uniformity and regularity of the surface of the silicon. The method has the advantages of controllable operation, simplicity, easy implementation, high repeatability and easy large-scale production application.

The invention discloses a preparation method of a thorn-ball photochromic MoO3 thin film. The preparation method comprises the following steps: (1) preparing a 0.05-3mol/L molybdate liquor; (2) adding a formaldehyde liquor to the molybdate liquor, adjusting the pH of the liquor by a pH adjustor to 0.8-1.5, and stirring and homogenizing in dark light; (3) transferring the homogenized reaction liquor to a reaction container, and placing a clean transparent conductive oxide crystal substrate for hydrothermal reaction; (4) after hydrothermal reaction, cooling to reaction system to room temperature, taking out the crystal substrate plated with film from the container for hydrothermal reaction, and washing with water and alcohol and drying to prepare the thorn-ball photochromic MoO3 thin film. The MoO3 thin film prepared by the invention can generate a good photochromic effect under a condition of a low power excitation light source, and the photochromic performance of the MoO3 thin film is improved.

The invention provides a perovskite-based thin film solar cell. The solar cell comprises a transparent electrode layer, an electron transmission layer, a perovskite light absorption layer, a hole transmission layer and a metal electrode layer, wherein the perovskite light absorption layer is provided with a first surface and a second surface, the first surface and the second surface are provided with a plurality of convex-concave parts, and a cross section of each convex-concave part is an isosceles triangle with a top angle being 150 degrees. In the perovskite-based thin film solar cell, contact surfaces among the perovskite light absorption layer, the electron transmission layer and the hole transmission layer are of convex-concave structures, and thus, the light absorption area of the perovskite light absorption layer is expanded; since a surface of the light absorption layer is an isosceles triangle with an angle being an obtuse angle, more light rays can be reflected, so that sunlight absorption quantity is further improved, and the efficiency of power generation from light is effectively improved; and meanwhile, the transmission area of electrons and holes which are generatedby the light absorption layer is expanded, the transmission efficiency of the electrons and the holes which are generated by the light absorption layer is improved, so that the stability of a currentand a battery is improved.

The invention belongs to the technical field of photocatalysts, and discloses a two-dimensional ZnS/ZnO/ZnS nanosheet photocatalyst and a preparation method thereof. The nanosheet is a sandwich structure formed by sequential arrangement of a ZnS layer, a ZnO layer and a ZnS layer, the nanosheet has a thickness of 5-10 nm and a lateral dimension of 1-10 [mu]m; the outermost ZnS layer has a thickness of 1-2 atomic layers; as a photocatalyst, the nanosheet has a band gap of 2.6-2.8 eV; and the preparation method comprises the steps of performing thermal evaporation on zinc powder in a gas phase,utilizing a carbon disulfide or sulfur dioxide active gas to obtain a nanosheet template, and performing oxidizing annealing to obtain the ZnS/ZnO/ZnS nanosheet. Compared with other ZnO nano materials, the two-dimensional ZnS/ZnO/ZnS nanosheet provided by the invention has the sandwich structure, and has a smaller band gap and a thinner thickness as a photocatalyst; and in addition, the preparation method provided by the invention has a simple process, smart design and low costs, and is safe and controllable.

The invention relates to a method for accelerating sun-dried salt making by a hydrophilic material and a device. The device comprises a buoyancy layer, a water supply layer and a light absorption layer, wherein the buoyancy layer is cylindrical, the water supply layer wraps the periphery of the buoyancy layer, the light absorption layer wraps the periphery of the water supply layer, and thus, a device body can be cylindrical; and both the water supply layer and the light absorption layer have hydrophilicity. According to the method and the device, the device achieves rapid sun-dried salt making through accelerating moisture evaporation by using a hydrophilic optothermal material. The device is cylindrical, and one face, located above a water surface, of the device is arc-shaped, so that the surface of the device can be thoroughly irradiated by sunlight from various angles, and the light absorption area is increased. Heat is generated and is conducted to the surface of the water supplylayer after the light absorption layer absorbs light energy, so that a layer of water film between the light absorption layer and the water supply layer is heated, and the flash evaporation of moisture is achieved.

A touch module with photovoltaic conversion function includes a touch zone and a non-touch zone. The touch zone includes a first clear substrate, a second clear substrate and a photovoltaic conversion unit. The first clear substrate has opposite first and second sides, and the second clear substrate has opposite third and fourth sides. A first and a second touch electrode layer are provided on the second side and the third side, respectively; and the photovoltaic conversion unit is provided on the first side of the first clear substrate. By providing the photovoltaic conversion unit in the touch zone of the touch module, the photovoltaic conversion unit can have increased light-absorption areas to enable conversion of light into more electric current and accordingly, enable a touch device using the touch module to have extended standby and operation time.

The invention discloses a method for immobilizing a photocatalyst on a flexible fiber substrate, and belongs to a photocatalysis technology. The method comprises the steps of adding a solvent into a photocatalyst and a silicon dioxide binder to prepare a catalyst turbid liquid; coating a flexible fiber substrate with the catalyst turbid liquid, and conducting drying to obtain a photocatalyst-loaded precursor; and soaking the photocatalyst-loaded precursor in an alkaline solution, and conducting drying to obtain the target product loaded photocatalyst, wherein the loading capacity of the photocatalyst is 0.2-1.6 mg/cm<2>. Compared with other loading methods, the method has the advantages that high-temperature treatment is not needed, the silicon dioxide binder and the flexible fiber substrate are adopted, the photocatalyst can be stably loaded on the carrier only by drying, the bonding effect is good, the operation is simple and convenient, the equipment requirement is low, the cost islow, and the loaded photocatalyst can be prepared on a large scale; the photocatalytic activity is high, and the photocatalyst has better reutilization performance in an alkaline reaction solution; and the selected flexible carrier material is convenient for other treatment, stable in performance and wide in application range.

The invention provides an electric power assisted bicycle with flexible solar panel power generation. The electric power assisted bicycle comprises a solar absorber cover, storage box, control switchand USB charging hole. A bicycle frame is disposed on the bicycle body; a front wheel is fixed on the front bottom bolt of the frame, and a handlebar is welded and fixed on a top side of the frame rotating shaft on the upper side of the front wheel, and a control switch is fixed on one side of the handlebar; a storage box is welded to the front side of the beam of the frame; a rear wheel is fixedto the bottom bolt of the frame; a storage box is fixedly disposed on the upper frame of the rear wheel; the upper side of the storage box is fixedly mounted with a solar absorption cover through a fixing frame. The electric power assisted bicycle with flexible solar panel power generation is provided with a solar absorption cover designed in a rotating laminated structure of curved pieces. The rotatable switch can be stored and used, which facilitates the storage and use of the solar absorption cover, thereby effectively increasing the adjustment performance.

A touch device with photovoltaic conversion function includes a main body divided into a touch zone and a non-touch zone located immediately around the touch zone. A photovoltaic conversion layer is provided on a top of the touch zone. By providing the photovoltaic conversion layer on the top of the touch zone of the touch device, the photovoltaic conversion layer can have an increased light-absorption area to enable conversion of more light into more electric current for use by the touch device and accordingly, enable the touch device to have extended standby and operation time.

A diamond comb-shaped thin film solar panel comprises an electric appliance function box and thin film solar cell layers. A transparent substrate is arranged in a corrugated shape on a diamond one-piece supporting frame, the two sides of the substrate are covered with the thin film solar cell layers, a bottom plate is arranged at the bottom of the supporting frame, the thin film solar cell layers are arranged on the bottom plate, a frame is arranged on the periphery of the bottom plate, and the frame is covered with a top light-transmitting plate. In this way, the photovoltaic effect produced by the situation that the thin film solar cell layers absorb the top light photoemission is increased, and the diamond comb-shaped three-dimensional light absorption area of the corrugated-shaped substrate is increased, and light absorption conversion is larger than 39%. According to the diamond comb-shaped thin film solar panel, by means the process structure of three-dimensional space, the light absorption area of the thin-film solar cell is effectively increased, and the light-energy conversion efficiency is improved. The diamond comb-shaped thin film solar panel is convenient to assemble, maintain and replace in an integral mode and convenient to use due to the fact that local replacement further can be achieved, thereby having high commercial popularization value.