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6 results about "Photovoltaic effect" patented technology
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The photovoltaic effect is the creation of voltage and electric current in a material upon exposure to light. It is a physical and chemical phenomenon. The photovoltaic effect is closely related to the photoelectric effect. In either case, light is absorbed, causing excitation of an electron or other charge carrier to a higher-energy state. The main distinction is that the term photoelectric effect is now usually used when the electron is ejected out of the material (usually into a vacuum) and photovoltaic effect used when the excited charge carrier is still contained within the material. In either case, an electric potential (or voltage) is produced by the separation of charges, and the light has to have a sufficient energy to overcome the potential barrier for excitation. The physical essence of the difference is usually that photoelectric emission separates the charges by ballistic conduction and photovoltaic emission separates them by diffusion, but some "hot carrier" photovoltaic device concepts blur this distinction.
A reflective vest with warning lights
ActiveCN224268379UImprove the magnetic effectImprove comfortProtective garmentBattery chargePhotovoltaic effect
This application relates to the field of vest technology, disclosing a reflective warning vest, including a vest, an arc-shaped magnetic plate, a magnetic base, a warning light, a magnetic plate, a photovoltaic panel, a storage battery, and a control box. In use, in dimly lit environments at night, the warning light can be activated via the control box to serve as a warning, making it easily observable and alerting others to avoid the area. During this time, the storage battery continuously consumes its charge. In well-lit environments during the day, the photovoltaic panel utilizes the photovoltaic effect at the semiconductor interface to directly convert solar energy into electrical energy, which is then stored in the storage battery to charge it. This compensates for the nighttime power consumption and enables automatic battery charging. Therefore, there is no need to repeatedly remove and recharge the battery, saving time and effort and offering the advantage of ease of use.
Owner:HEILONGJIANG PROVINCE DONGFANGHONG FORESTRY BUREAU CO LTD GUARDIAN CLOTHING BRANCH
Bipolar response dual-color detector, method of making and use thereof
The application discloses a dual-color detector with bipolar response, a preparation method and application thereof. The detector comprises a first light absorption layer capable of absorbing light in a first wavelength domain and forming photo-generated carriers based on a photovoltaic effect; a second light absorption layer capable of absorbing light in a second wavelength domain and forming photo-generated carriers based on a photothermoelectric effect, the second light absorption layer cooperating with the first light absorption layer to form a pn heterojunction; a first electrode in electrical contact with the first light absorption layer, and the first electrode being spaced apart from the second light absorption layer; and a second electrode in electrical contact with the second light absorption layer. The dual-color detector has the advantages of high integration, bipolar response, low energy consumption, simple operation, high accuracy, and great significance for simplifying the design of an optical communication system and realizing an efficient signal modulation scheme.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Indium sulfide / copper sulfide heterojunction porous sphere broadband photoelectric detection material and preparation method and application thereof
This invention belongs to the field of photoelectric detection material preparation technology, specifically relating to an indium sulfide / copper sulfide heterojunction porous spherical broadband photoelectric detection material, its preparation method, and its application. An indium source and a copper source precursor are added to an aqueous solution of a hydroxyethyl ionic liquid and stirred until homogeneous. Then, a sulfur source is added and stirred until homogeneous. A hydrothermal reaction is then carried out at 140-220 °C. After the reaction, the mixture is centrifuged and washed, and the resulting precipitate is dried under vacuum. The indium sulfide / copper sulfide heterojunction prepared by this invention has a porous spherical structure. This porous sphere is formed by the self-assembly of two-dimensional nanosheets with a thickness of approximately 20-500 nm. The diameter of the entire porous sphere is approximately 4.5-15 μm, and its surface and interior are distributed with macropores of 50 nm-2 μm. This porous spherical structure has a high specific surface area, abundant surface states and defect energy levels, and can generate a significant photovoltaic effect under zero bias voltage, achieving broadband, fast, and sensitive photoelectric detection from the ultraviolet, visible, to near-infrared range.
Owner:HENAN UNIV OF SCI & TECH
A ferroelectric photovoltaic device based on the shielding effect regulated by a dielectric insulating layer and its fabrication method.
This invention discloses a ferroelectric photovoltaic device and its fabrication method based on the shielding effect regulated by a dielectric insulating layer, belonging to the field of ferroelectric photovoltaic device technology. The ferroelectric photovoltaic device based on the shielding effect regulated by a dielectric insulating layer comprises, from bottom to top, a substrate, a bottom electrode layer, a dielectric insulating layer, a photoelectric ferroelectric functional layer, and a top electrode layer; the dielectric insulating layer is an Al2O3 layer; the photoelectric ferroelectric functional layer is a hexagonal LuMnO3 single crystal layer. This invention utilizes the high dielectric constant Al2O3 dielectric insulating layer to form a mirror shield against external free charges, weakening the compensation of interface induced charges on the ferroelectric residual polarization, thereby regulating the ferroelectric depolarization field and thus controlling the photovoltaic effect; simultaneously, the dielectric insulating layer can effectively block carrier injection, suppress leakage current, reduce dark current, and thus increase the photoelectric response of the device.
Owner:GUANGDONG UNIV OF TECH
A building coating material, its preparation method and application
This application relates to the field of building materials technology, and more particularly to a building coating material, its preparation method, and its application. A building coating material is provided, comprising a filler with selective reflectivity, a photoluminescent material, a polymer emulsion, additives, and water. The addition of the selectively reflective filler results in a coating with high reflectivity only within its spectral response band, enhancing the intensity of incident solar radiation and improving the power conversion efficiency of BiPV. Combined with the photoluminescent material, the photoluminescent material re-emits photons of specific wavelengths absorbed by the selectively reflective filler within the visible range, generating a photovoltaic effect, improving energy conversion efficiency, and simultaneously achieving effective radiative cooling. Therefore, the obtained building coating material is suitable for a wider range of building types and surfaces, possessing significant market potential and practical usability.
Owner:THE HONG KONG POLYTECHNIC UNIV
Self-powered humidity sensing device based on lateral photovoltaic effect and detection method
This invention discloses a self-powered humidity sensing device and detection method based on the transverse photovoltaic effect. This invention relates to the fields of photoelectric sensing technology and environmental parameter detection technology. Based on the transverse photovoltaic effect and combined with the humidity-sensitive characteristics of conductive polymers, the transverse photovoltaic voltage is modulated by ambient humidity, enabling self-powered humidity detection without a bias power supply. This constructs a novel passive humidity detection method. The advantages of this invention are: by combining the transverse photovoltaic effect and the humidity-sensitive characteristics of conductive polymers, the transverse photovoltaic voltage generated by the conductive polymer film under non-uniform illumination is used as the sensing signal for humidity detection. No external bias power supply or complex driving circuitry is required; self-powered humidity signal detection can be directly achieved, compared to traditional resistive and capacitive humidity sensors.
Owner:FUDAN UNIVERSITY