7 results about "Pyroelectricity" patented technology

The utility model discloses an intelligent control circuit of a household electrical appliance circuit board, which relates to the technical field of household electrical appliance circuit boards and comprises a power supply module used for electric energy conversion processing and power supply; the human body induction module is used for performing human body pyroelectric induction and controlling the power supply control module to perform electric energy transmission work when inducting a human body; the trigger control module is used for controlling the delay control module to carry out delay work when the duration of sensing the human body exceeds the timing time; the delay control module is used for setting delay time and performing delay control on power supply work of the power supply control module; and the power supply control module is used for controlling electric energy transmission and supplying power to the household appliance circuit board connected with the household appliance circuit board module. The intelligent control circuit of the household electrical appliance circuit board can improve the self-starting intelligence of the household electrical appliance circuit board and reduce the energy loss of the household electrical appliance circuit board.

The invention belongs to the related technical field of flexible pyroelectric materials, and particularly relates to a thermoforming method for improving ferroelectric polarization and pyroelectricity and a product. The method comprises the following steps: spreading polyvinylidene fluoride-tetrafluoroethylene polymer powder with a ferroelectric phase on a substrate; and heating the powder to a molten state, applying pressure to the polyvinylidene fluoride-tetrafluoroethylene polymer in the molten state, maintaining the pressure for a period of time, cooling, and releasing the pressure to obtain the required film. The invention also discloses a product prepared by the method. According to the invention, the problem that the existing P (VDF-TFE) copolymer is difficult to realize application due to low pyroelectric property is solved.

The invention belongs to the technical field of semiconductor photoelectric device processes, and particularly relates to a graphene-lithium tantalate transistor long-wave infrared detector and a preparation method thereof. The infrared detector comprises a substrate, a lithium tantalate film, a graphene layer, a source metal electrode, a drain metal electrode and a passivation layer, wherein the lithium tantalate film is located on the substrate; the source metal electrode and the drain metal electrode are arranged on the lithium tantalate film, a graphene layer is arranged on the lithium tantalate film between the source metal electrode and the drain metal electrode, and a passivation layer is arranged on the graphene layer. Graphene is introduced to a lithium tantalate film to form a ferroelectric field effect transistor structure, a vertical heterostructure of a silicon substrate, the lithium tantalate film and a graphene channel is constructed, and the excellent conductivity of graphene and the pyroelectric characteristic of lithium tantalate are utilized; the signal reading and amplifying capability and the pyroelectric response characteristic of the detector are remarkably improved, and an infrared detection unit device with high sensitivity and quick response capability is successfully prepared.

The application discloses a Td-WTe2 / 1T'-MoTe2 heterojunction device for room-temperature photoelectric detection and a preparation method and application thereof. The heterojunction device is composed of Td-WTe2 and 1T'-MoTe2, and the two are connected through interlayer van der Waals force in an overlapping area. When light irradiates the overlapping area or a neighboring area thereof, a photo-thermal-electric response can be generated due to the difference in Seebeck coefficients of the two. The application provides a device scheme for realizing room-temperature photoelectric detection by utilizing the difference in thermoelectric properties of two specific materials without relying on a traditional semiconductor depletion region or an asymmetric light irradiation condition, and has the advantages of room-temperature operation, self-power supply, near-infrared response and fast response, and has important value in the field of photoelectric detection.

The invention discloses a liquid-like surface large particle multi-type solid-liquid control method based on a pyroelectric effect. The method comprises the following steps: step 1, pretreating a pyroelectric wafer material; step 2, performing liquid phase modification on the pyroelectric wafer; step 3, preparing a photo-thermal response material; step 4, operating platform combination; step 5, directional control of liquid drops; and step 6, performing directional control on the solid particles. The control platform designed by the invention is formed by combining three layers of materials in a blocking manner, the preparation process is simple, the solid-liquid control operation method is simple and convenient, and the production cost is relatively low. According to the control platform, a liquid-like surface and a pyroelectric material are combined, on the basis that the friction force between a solid and the surface of the platform is greatly reduced on the liquid-like surface, local charge gradient is generated on the surface by means of the response mechanism of the pyroelectric material, and direct control over the solid material is achieved under the action of dielectrophoretic force; the innovative microfluidic platform and solid control mode greatly widen the practical application of the technical field of microfluidic.

The application belongs to the technical field of semiconductor photoelectric device process, and particularly relates to a graphene-lithium tantalate transistor long-wave infrared detector and a preparation method thereof. The infrared detector comprises a substrate, a lithium tantalate film, a graphene layer, a source metal electrode, a drain metal electrode and a passivation layer; the lithium tantalate film is located on the substrate; the source metal electrode and the drain metal electrode are arranged on the lithium tantalate film; the graphene layer is arranged on the lithium tantalate film between the source metal electrode and the drain metal electrode; and the passivation layer is arranged on the graphene layer. The application introduces graphene into the lithium tantalate film to form a ferroelectric field effect transistor structure, constructs a vertical heterostructure of "silicon substrate-lithium tantalate film-graphene channel", utilizes the excellent conductivity of graphene and the pyroelectricity of lithium tantalate, significantly improves the signal reading and amplification capacity and the pyroelectricity response characteristic of the detector, and successfully prepares an infrared detection unit device with high sensitivity and rapid response capacity.

This invention provides Na 0.5 Bi 0.5 The application of TiO3 materials in the catalytic degradation of organic pollutants; this invention discovers that Na… 0.5 Bi 0.5 TiO3 materials possess pyroelectric properties and exhibit spontaneous polarization dependent on temperature oscillations. This allows them to generate polarized charge carriers, thereby catalyzing the degradation of organic pollutants through pyroelectricity. The thermal energy generated by temperature fluctuations is efficiently converted into chemical energy, enabling the degradation of pollutants under conditions of temperature variation in darkness, natural nighttime temperature differences, and natural daytime temperature differences under illumination.