8results about How to "Improve light absorption" patented technology

The invention discloses a preparation method of a D-mannitol-melamine foam composite solid-solid phase change material. The preparation method comprises the following steps: cutting melamine foam MF into small blocks; placing the melamine foam sample cut into blocks on a porcelain boat in a quartz tube of a tubular resistance furnace, carbonizing in a nitrogen atmosphere, and cooling to room temperature after carbonization is finished; adding the carbonized melamine foam CF block into molten D-mannitol DM, and carrying out vacuum impregnation in a vacuum drying oven; and taking out the impregnated sample, heating the sample on a heating plate, and removing redundant mannitol on the surface to obtain the D-mannitol-melamine foam. The prepared DM / CF composite material has excellent shape stability, leakage, loss or form out-of-control of the phase change material in the phase change process can be avoided, the safety and reliability of the material are guaranteed, and potential application prospects are provided for the fields of solar energy utilization, industrial waste heat recovery and the like.

The invention discloses a laminated solar cell module, a method for improving the photoelectric conversion efficiency of the laminated solar cell module and application of the laminated solar cell module. The laminated solar cell module comprises a first cell used for absorbing first wave band light in incident light; the third battery is used for absorbing third wave band light formed from the first installation site, and the first battery and the third battery are sequentially arranged in a stacked mode; or the first battery is used for absorbing the first wave band light in the incident light; the fourth battery is used for absorbing fourth wave band light formed from the second installation site, the first battery and the fourth battery are sequentially stacked, and the third wave band light is different from the fourth wave band light. According to the laminated solar cell module provided by the invention, solar spectrum can be absorbed more sufficiently, incident light in the light incoming direction can be fully absorbed, reflected light can also be fully absorbed, and the photoelectric conversion efficiency of the cell module is improved.

The utility model belongs to solar heating technology field, specifically disclose a box body light -concentrating type solar medium temperature heat collector, the utility model discloses a sealed box body of one side glass cover, the bottom and the side surface of box body are equipped with heat preservation layer, be equipped with upper flow collecting pipe and lower flow collecting pipe in the box body, be equipped with at least two fin heat absorption unit between heat preservation layer and glass cover, the both ends of fin heat absorption unit are connected with the upper flow collecting pipe and lower flow collecting pipe of the intercommunication box body respectively, fin heat absorption unit includes fin adsorption pipe and reflector, and fin adsorption pipe sets up at the light -concentration of reflector surface. The utility model discloses the synergistic effect of metal light -concentrating structure and straight -through type flow channel design, can realize the stable output of medium temperature, improve the pressure intensity of system output, improved the reliability of medium temperature pressure bearing. The utility model can be widely applied to the light -heat conversion field of solar energy.

The application discloses a phase change microcapsule composite heat storage material with photocatalytic characteristics and a preparation method thereof. The phase change microcapsule composite heat storage material has a whole core-shell structure, paraffin as a core, crystalline TiO2 with photocatalytic characteristics as a shell wall coated on the surface of the paraffin, and nano-titanium nitride and carbon nanotube composite blended photothermal conversion particles as core-shell modification materials uniformly attached to the surface of the TiO2. The phase change microcapsule composite heat storage material has a stable core-shell structure, full-spectrum solar photothermal conversion capacity, and effectively improves the coating rate, the thermal conductivity and the photocatalytic efficiency, retains the thermal properties of paraffin and inhibits leakage and corrosion.

The application discloses a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a plurality of cell pieces and an interconnecting piece. The plurality of cell pieces are arranged along a first direction, and the interconnecting piece is arranged on the cell pieces and electrically connected to adjacent cell pieces. A plurality of spaced-apart conductive connecting layers are arranged between the interconnecting piece and the cell pieces, and the interconnecting piece is electrically connected to the cell pieces through the conductive connecting layers. At least part of the positions between the interconnecting piece and the cell pieces are provided with gaps between two adjacent conductive connecting layers. In this way, stray light can be irradiated into the gaps and reflected multiple times on the surface of the cell pieces and the surface of the interconnecting piece, so that resonance enhancement is generated to be absorbed by the cell pieces, thereby increasing the light absorption rate of the cell pieces. In addition, the photovoltaic module structure of the application can be realized by optimizing the local structure of the photovoltaic module based on the existing process, without introducing new equipment and new materials, and without increasing the product cost.

A photodetector and its formation method are disclosed. The photodetector includes: a substrate; a light transmission layer located on the substrate, the light transmission layer extending along the light propagation direction and perpendicular to the light propagation direction, the light transmission layer including a light absorption region; a light absorption layer located on the light transmission layer of the light absorption region; a first doped region located in the light transmission layer on the side of the light absorption region; and a second doped layer located on the light absorption layer, and on the side perpendicular to the light propagation direction, at least one side of the second doped layer protrudes outward relative to the light absorption layer, the doping type of the second doped layer being opposite to that of the first doped region. This invention is beneficial for improving the bandwidth and responsivity of the photodetector.

This invention belongs to the field of photo-evaporation desalination of water, specifically relating to a composite photoevaporator for photo-evaporation desalination and its preparation method. Carbon nanotubes, which possess excellent light absorption and water transport capabilities, are dispersed in biomass materials. Simultaneously, a layer of copper acetate is sprayed onto the surface of the biomass materials containing carbon nanotubes, forming copper particles after carbonization. The photoevaporator prepared by this invention combines metal, carbon nanotubes, and biomass materials, exhibiting contrasting hydrophilic and hydrophobic properties and strong salt resistance.

This invention relates to a pyrrolopyrrole organic small molecule photothermal material with high photothermal conversion efficiency, its preparation method, and its application. The invention belongs to the field of organic small molecule photothermal materials. It aims to solve the problems of poor thermal stability and low photothermal conversion efficiency in existing photothermal materials. Preparation method: BrDPPBr, R-boronate, potassium carbonate, and a high-boiling-point solvent are mixed, then heated, and a phosphine compound is added. The mixture is heated and stirred continuously. After the reaction, it is cooled to room temperature, and then pure water is added to precipitate the solid. The solid is then recrystallized and purified to obtain the pyrrolopyrrole organic small molecule photothermal material. Application: It is used for water evaporation. This invention relates to pyrrolopyrrole organic small molecule photothermal materials with high photothermal conversion efficiency, their preparation, and their applications.