197 results about "Solar energy conversion efficiency" patented technology

A dye-sensitized solar cell including ZnO nanowire arrays grown of a flat substrate for harvesting solar energy is integrated with a piezoelectric nanogenerator for harvesting ultrasonic wave energy. The two energy harvesting approaches work simultaneously or individually and can be integrated in parallel or serial for raising the output current, voltage or power, respectively. A solar cell employs an optical fiber and semiconductor nanowires grown around the fiber. A p-n junction based design, organic-inorganic heterojunction, or a dye-sensitized structure is built at the surfaces of the nanowires. Light entering the fiber from a tip propagates through the fiber until it enters a nanowire where it reaches a photovoltaic element. Light entering the fiber cannot escape until it interacts with a photovoltaic element, thereby increasing the solar conversion efficiency. The fiber can transmit light, while the nanowires around the fibers increase the surface area of light exposure.

A solar power management system is provided for managing electric energy conversion by a photovoltaic cell module, supplying the converted electric energy to an external load, and storing the converted electric energy in a battery. The solar power management system comprises a multiphase maximum power tracking (MPT) module, a charging circuit, and a voltage conversion module. The multiphase MPT module regulates output current of the photovoltaic cell module to output maximum power within the high limit thereof and obtain improved solar energy conversion efficiency. The voltage conversion module converts the electric energy generated by the photovoltaic cell module into different voltage formats, such as 5.6V DC, 1.0V DC, 0.6˜0.3V DC low voltage, or −1.2V DC negative voltage, to meet different external load requirements. The solar power management system has simple circuitry and can be configured as a system on chip (SoC) at reduced cost while provides very wide applications.

Photocatalytic water splitting is employed as a method to directly obtain clean hydrogen from solar radiation by using hybrid nanoparticles with metallic cores and semiconductor photocatalytic shells. Efficient unassisted overall photocatalytic splitting of water is based on resonant absorption from surface plasmon in metal core / semiconductor shell hybrid nanoparticles, which can extend the absorption spectra further towards the visible-near infrared range, thus dramatically increasing the solar energy conversion efficiency. When used in combination with scintillator nanoparticles, the hybrid photocatalytic nanoparticles can be used for conversion of nuclear energy into hydrogen.

A dye-sensitized solar cell including ZnO nanowire arrays grown of a flat substrate for harvesting solar energy is integrated with a piezoelectric nanogenerator for harvesting ultrasonic wave energy. The two energy harvesting approaches work simultaneously or individually and can be integrated in parallel or serial for raising the output current, voltage or power, respectively. A solar cell employs an optical fiber and semiconductor nanowires grown around the fiber. A p-n junction based design, organic-inorganic heterojunction, or a dye-sensitized structure is built at the surfaces of the nanowires. Light entering the fiber from a tip propagates through the fiber until it enters a nanowire where it reaches a photovoltaic element. Light entering the fiber cannot escape until it interacts with a photovoltaic element, thereby increasing the solar conversion efficiency. The fiber can transmit light, while the nanowires around the fibers increase the surface area of light exposure.

Novel Semiconducting photovoltaic polymers with conjugated units that provide improved solar conversion efficiency that can be used in electro-optical and electric devices. The polymers exhibit increased solar conversion efficiency in solar devices.

The field of the invention relates to minimization of resistive loss of solar panels in order to achieve maximum solar energy conversion efficiency, extracting more electricity power from available solar irradiance. Schemes are designed to take advantage of the geometrical and mechanical configurations of back contact solar cells to make better electrical contacts and connections so as to achieve maximum solar energy conversion efficiency and better power extraction.

Novel Semiconducting photovoltaic polymers with conjugated units that provide improved solar conversion efficiency that can be used in electro-optical and electric devices. The polymers exhibit increased solar conversion efficiency in solar devices.

A dye-sensitized solar cell including ZnO nanowire arrays grown of a flat substrate for harvesting solar energy is integrated with a piezoelectric nanogenerator for harvesting ultrasonic wave energy. The two energy harvesting approaches work simultaneously or individually and can be integrated in parallel or serial for raising the output current, voltage or power, respectively. A solar cell employs an optical fiber and semiconductor nanowires grown around the fiber. A p-n junction based design, organic-inorganic heterojunction, or a dye-sensitized structure is built at the surfaces of the nanowires. Light entering the fiber from a tip propagates through the fiber until it enters a nanowire where it reaches a photovoltaic element. Light entering the fiber cannot escape until it interacts with a photovoltaic element, thereby increasing the solar conversion efficiency. The fiber can transmit light, while the nanowires around the fibers increase the surface area of light exposure.

The present invention discloses a wood drying method by using solar energy, comprising the steps of: putting the wood to be dried in a drying cabinet (8); supplying heat to the drying cabinet; and stopping the supply of heat when the temperature T2 of the drying cabinet (8) is higher than the setting drying temperature of the wood to dry the wood under the setting drying temperature. The movable drying device by using solar energy has stable running, constant drying temperature and continuous drying function with lower power consumption, higher solar energy conversion efficiency and good drying quality, thereby reducing the drying cost.

The invention discloses a method for manufacturing a double-layer solar energy printing screen. The method for manufacturing the double-layer solar energy printing screen comprises the steps that: S1: a first-layer solar energy screen is manufactured by laser or etching, wherein an opening graph of the solar energy screen is carved on a certain thickness of metal plate in a hollowing manner by utilizing a laser cutting process or an etching process; S2: the screen is preprocessed, wherein processing procedures of oil removing, acid washing, water scrubbing, and abrasive blasting are carried out on the metal plate obtained from the step S1; and S3: a second screen is manufactured by electroforming, wherein a photosensitive film layer is uniformly pasted on the surface of the metal plate, graphic areas are exposed and developed, and thus the photosensitive film of a non-graphics areas are removed, the developed metal plate is put in an electroforming groove to be electroformed, and then a film stripping and cleaning process is carried out, so that manufacture of the double-layer solar energy printing screen is accomplished. According to the double-layer solar energy printing screen provided by the invention, a smooth solar-battery electrode fine grid line can be printed, good current collection and transmission capability are achieved, and the solar energy conversion efficiency is improved effectively.

The invention discloses a porphyrin organic small molecular photovoltaic material and a preparation method thereof. The disclosed porphyrin organic small molecular photovoltaic material adopts a porphyrin ring as a framework, one radical is in each of four meso-position positions of the porphyrin ring, wherein two radicals are acceptor units, and the other two radicals are aromatic substituted radicals. The invention further discloses the preparation method of the above porphyrin organic small molecular photovoltaic material. Pyrrole is used as a primary reaction material, then subjected to a series of simple reactions, and finally coupled with different acceptor units under the catalysis of palladium to obtain the porphyrin organic small molecular photovoltaic material. Compared with the prior art, the porphyrin organic small molecular photovoltaic material, disclosed by the invention, is improved in the ability to absorb light, intramolecular electric charge transmission performance and Pi-Pi stacking of molecules in a film forming state; the film forming performance of the material is improved, an organic photovoltaic battery prepared by using the material and adopting a solution processing method has better device performance, and the highest conversion rate of solar energy reaches 7.2 percent, so that the porphyrin organic small molecular photovoltaic material has a very important application prospect in solar batteries.

The present invention provides a mounting unit for solar panels that simplifies the complexity of storage, transit and in-field installation of solar electric generation systems. According to one embodiment, the mounting unit comprises a top panel, a bottom panel and a pair of panel guides, each formed integral with and adjacent to an opposing side of the top panel. Each panel guide includes a horizontal portion for supporting a solar panel and a vertical portion for providing an air channel between a bottom surface of the solar panel and an upper surface of the top panel. The air channel enables natural convection to cool the solar panel and optionally a power conversion device used within the system, thereby improving the solar conversion efficiency of the system. An improved method for installing a solar electric generation system is also provided herein.

The invention relates to an independent photovoltaic power generation railway power supply control system and a control method thereof and aims to solve the problems that equipment with special requirements such as large impact load and communication signal highly-stable load exists in railway electric equipment, solar photovoltaic power generation is largely influenced by environments, and low solar energy conversion efficiency and power insufficiency of a power supply system commonly exist in a photovoltaic power generation system. Solar radiation energy is collected and converted into direct-current electric energy, a storage battery pack is charged after conversion, the direct-current electric energy is converted into alternating-current electric energy for loads, load working voltage and current information monitored by a working state collector and environment information monitored by a environment illuminance collector and a environment temperature collector are transmitted to an energy accumulation system controller, and the information is logically processed to control a charging conversion module and an inversion conversion module. The independent photovoltaic power generation railway power supply control system has the advantages that the system adjusts, controls and outputs continuous and stable electric energy according railway load operation states and environmental conditions, electric energy quality and efficiency of photovoltaic power generation are increased, and the continuity and stability of power supply transmission are guaranteed.

The invention provides method and compositions to minimize the chlorophyll antenna size of photosynthesis by decreasing TLA1 gene expression, thereby improving solar conversion efficiencies and photosynthetic productivity in plants, e.g., green microalgae, under bright sunlight conditions.

Disclosed is a method of manufacturing the photoactive layer of organic photovoltaic cells using aerosol jet printing. The photoactive layer of the organic photovoltaic cell has high crystallinity and is easily formed into a multilayer structure, thus simplifying the process of manufacturing the organic photovoltaic cells. The solar power conversion efficiency of the organic photovoltaic cells including the photoactive layer is increased, thus facilitating the production of environmentally friendly energy.

The invention provides method and compositions to minimize the chlorophyll antenna size of photosynthesis by decreasing TLA2 gene expression, thereby improving solar conversion efficiencies and photosynthetic productivity in green microalgae, under bright sunlight conditions.

The invention relates to a processing method of a silicon chip reworked after screen printing. The method comprises the following steps: cleaning the silicon chip by adopting alcohol mixed with terpineol; then putting the silicon chip in hydrochloric acid with the mass percent concentration of 3-8% and immersing for 1-3 hours; then removing the residual hydrochloric acid on the surface of the silicon chip by utilizing de-ionized water; and finally putting the wetted silicon chip into alcohol for soaking and dehydration. By adopting the method provided by the invention, the problem of aluminum being residual on the surface of the silicon chip of the screen printing reworked chip in the treating process can be reduced, the generation of rejected products is reduced, and the solar conversion efficiency of the silicon chip is improved.

The invention discloses a glass photovoltaic building material component and a preparation method thereof. The glass photovoltaic building material component is formed by carrying out hot pressing ona fluorine plastic film, a first resin-based composite film material, a first EVA, a solar battery string, a second resin-based composite film material, and a piece of glass by a lamination machine. The component having characteristics of high power generation efficiency, high long-term reliability, long service life, and good safety performance not only has good glass-curtain-wall thermal insulation, sound insulation, ultraviolet-proof, and fragmented falling prevention performances but also can realize the high solar energy conversion efficiency of crystalline silicon and high-stability lighting and power generation performances. Meanwhile, the beautiful arc and the single large-dimension component are realized during the manufacturing process. The glass photovoltaic building material component is especially suitable for the complex-hook-surface-included building like a curved wall, a lighting roof, an agricultural greenhouse, a sun room, a parking shed, and a waiting hall.

The invention aims to provide a solar energy photovoltaic device of a vacuum glass tube. Solar energy optical to electrical material is arranged and processed in the vacuum layer of the vacuum glass tube to convert solar energy into electric energy; after the vacuum glass tube is sealed, the vacuum glass tube can be directly used and does not need to be packaged so as to lower the cost of the existing optical to electrical material; meanwhile, fluid or a heat pipe can be arranged in the cavity of a vacuum glass tube transmitting device to control the temperature of the solar energy optical to electrical material, so that the solar energy optical to electrical material can always keep high-efficiency conversion effect, and heat energy is comprehensively utilized after being transferred by the fluid or the heat pipe, and thus, solar energy generation and temperature control are realized, solar energy conversion efficiency is improved, and solar energy heat is comprehensively and integrally utilized. In order to improve solar energy utilization efficiency, a solar energy mirror is arranged out of the device to focus solar energy, i.e. reflect, refract, project solar energy, and in order to reduce heat waste, an insulating layer is added out of the device.

The invention discloses a cool storage temperature reduction type solar module aiming at providing a photovoltaic generating equipment which makes use of a natural temperature differential source to reduce working temperature of a solar cell and whose solar conversion efficiency is higher than that of common solar module; the cool storage temperature reduction type solar module comprises a solar cell packaging module, a cooling medium container which takes the packaging module as an upper closed surface, a cooling medium contained in the cooling medium container, an attemperator which can automatically open and close and surrounds the cooling medium container. The cool storage temperature reduction type solar module of the invention automatically opens the attemperator in the night so that the cooling medium and nighttime atmosphere exchange heat to reduce temperature close to daily minimum temperature of atmosphere, and closes the attemperator in daytime and reduces heat exchange with outside so that a natural temperature differential cooling capacity stored by the cooling medium is effectively used for reducing temperature of the solar cell, and can mostly cause the actual solar conversion efficiency of the solar cell to increase more than 10% according to the field experimentation result.

The invention discloses a self-cleaning solar heat collection tube. The tube comprises a left support plate and a right support plate which are arranged in parallel, wherein the left support plate andthe right support plate are of round structures, and a heat collection tube body is arranged on the side walls, close to each other, of the left support plate and the right support plate. The tube has the advantages that a heat absorption plate is used for absorbing solar energy and converts the solar energy into heat, a heat conduction rod and a heat conduction plate are used for conducting theheat to low-boiling-point evaporation liquid, the evaporation liquid reaches the boiling point and is evaporated and vaporized, an arc-shaped sliding plug and an inner magnet are pushed to do circularmotion around the heat collection tube, an outer magnet is attracted to drive a movable plate to move synchronously, a cleaning scraping brush is driven to scrape dust adhered to the surface of the heat collection tube, dust is gradually collected and forms block dirt and falls down, so that the surface of the heat collection tube is cleaned; and when the temperature is lowered, the low-boiling-point evaporation liquid is liquefied to enable the cleaning scraping brush to reversely rotate to perform cleaning again, so that the cleanliness of the surface of the heat collection tube is guaranteed, and the solar energy conversion efficiency of the heat collection tube is improved.

The invention discloses a system and a method for jointly producing energy by means of solar photocatalysis and medium and low-temperature thermal chemistry by the aid of spectrum frequency division, and belongs to the technical field of solar full spectra. The technical scheme mainly includes that a spectrum frequency divider is arranged right above a groove type reflecting mirror; solar energy with different spectra can be redistributed by the spectrum frequency divider, the solar spectra can be separated from one another at the wavelengths of 750 nm, sunlight with the wavelengths shorter than 750 nm is transmitted into a solar photocatalysis device for preparing hydrogen, sunlight with the wavelengths longer than 750 nm is transmitted to a low-temperature heat exchanger and a medium and low-temperature thermal chemical reaction device to provide heat energy required by heat absorption reaction, and the low-temperature heat exchanger and the medium and low-temperature thermal chemical reaction device are communicated with each other via pipelines to form circuits. The system and the method have the advantages that photocatalysis-medium and low-temperature thermal chemistry are jointly used, and accordingly waste heat can be recycled; each solar spectrum can be divided into two portions by the aid of spectrum frequency division technologies, accordingly, the hydrogen can be prepared by means of solar photocatalysis, the medium and low-temperature thermal chemistry can be efficiently utilized, energy can be saved, and the solar conversion efficiency can be improved.

Disclosed is a method for improving solar energy conversion efficiency of a metal oxide semiconductor photocatalyst, which includes rapidly performing hydrogenation and nitrogenation of a metal oxide semiconductor material through an H2 / N2 mixed gas plasma treatment in a single process at room temperature, so as to enhance photocatalytic energy conversion efficiency. Specifically, disclosed is a treatment technique in which a plasma ball formed by controlling a mixing ratio of hydrogen gas to nitrogen gas in a range of 1:1 to 1:3 contacts with a surface of a metal oxide material, such that a great amount of oxygen vacancy and nitrogen elements are introduced in the surface of the metal oxide material to improve electron-hole pairs transfer ability thereof and decrease a size of the band-gap. A catalyst including the metal oxide material directly converts the solar energy into a compound by photocatalytic hydrogen generation and CO2 conversion.

A solar power management system is provided for managing electric energy conversion by a photovoltaic cell module, supplying the converted electric energy to an external load, and storing the converted electric energy in a battery. The solar power management system comprises a multiphase maximum power tracking (MPT) module, a charging circuit, and a voltage conversion module. The multiphase MPT module regulates output current of the photovoltaic cell module to output maximum power within the high limit thereof and obtain improved solar energy conversion efficiency. The voltage conversion module converts the electric energy generated by the photovoltaic cell module into different voltage formats, such as 5.6V DC, 1.0V DC, 0.6˜0.3V DC low voltage, or −1.2V DC negative voltage, to meet different external load requirements. The solar power management system has simple circuitry and can be configured as a system on chip (SoC) at reduced cost while provides very wide applications.

The invention discloses a photothermal conversion material and application thereof in seawater desalination and salt recovery, and belongs to the technical field of material chemistry and solar energy conversion. The photothermal conversion film material comprises a glass fiber film, wherein a compact polyaniline layer and a porous honeycomb cobalt-nickel sulfide are sequentially grown on the surface of glass fiber in situ. Simulated seawater containing different salt concentrations is in contact with a metal sulfide-based photothermal conversion film material, and the photo-thermal conversion material is irradiated by set light, so that the metal sulfide-based photothermal conversion material performs photothermal conversion and generates heat energy, water in the seawater is promoted to evaporate, salt crystals are deposited on the surface of the photothermal film in a salt ring form, and continuous and efficient seawater desalination treatment and salt recovery are realized. The bimetallic sulfide photothermal conversion film material has the advantages of high specific surface area, high light absorptivity, high weather resistance and high solar energy conversion efficiency, and long-acting solar energy desalination can be realized due to the unique structural design of the bimetallic sulfide photothermal conversion film material.

The invention relates to the technical field of photovoltaic and discloses a photovoltaic support control method and system. The method comprises following steps of: according to bearing force of a photovoltaic support in a preset environment, setting an environment parameter preset value; acquiring environment parameters in the environment where the photovoltaic support is located; judging whether the environment parameters are smaller than the environment parameter preset value so as to obtain a first judgment result; and controlling the photovoltaic support to finish actions according to the first judgment result. According to the invention, by acquiring environment information of the environment where the photovoltaic support is located, the photovoltaic support is enabled to change actions according to change of the external environment, so the photovoltaic support is suitable for various kinds of application environments; an objective of adaptively adjust the inclined angle in different environments is achieved; and survival ability of the photovoltaic support and solar energy conversion efficiency are improved.

The invention relates to a manufacturing method of a film material for solar cell panels, in particular to a manufacturing method of a film material for solar cells. The film material comprises a substrate layer (1), a template film layer (2) and a semiconductor film layer (3) from bottom to top, wherein the substrate layer (1) is sheet metal, ceramic or glass in a non-crystalline or polycrystalline structure; the template film layer (2) is in a crystallographic biaxial texture structure and is prepared by an inclined substrate deposition method; and the semiconductor film layer (3) is prepared by physical vapor deposition or chemical vapor deposition, is formed by epitaxial growth of the template film layer, is in a crystallographic biaxial texture structure, and is in a photovoltaic conversion structure formed by connecting one or a plurality of P-N joints in series. In the invention, the thickness of the semiconductor layer for solar cells is only 1-10 micrometers, thereby saving 98% of silicon semiconductor materials; compared with non-crystalline solar cells, the solar conversion efficiency can be improved by 12%; the invention has the advantages of simple equipment, high efficiency and low cost; and the template film layer (2) has a certain roughness, sunlight can be fully absorbed, and the absorption efficiency and the conversion efficiency of the solar cells can be improved.

A continuous thin film deposition apparatus that includes a remote plasma source. The source forms a plasma from a precursor and delivers a modified form of the plasma as a charge-depleted deposition medium to a deposition apparatus for formation of a thin film material. The thin film may be formed on a continuous web or other moving substrate. The charge-depleted deposition medium may be formed within the remote plasma source and delivered to an operatively coupled deposition apparatus or the charge-depleted deposition medium may form as the plasma exits the remote plasma source. The initial plasma is formed within the remote plasma source and includes a distribution of charged species (electrons and ions). The charge-depleted deposition medium contains a reduced concentration of the charged species and permits deposition of thin film materials having lower defect concentration. In one embodiment, the thin film material is a solar material and the lower defect concentration provides a higher solar conversion efficiency.

The invention provides a preparation method of a graphene oxide-based porous photo-thermal material capable of efficiently generating solar steam. The preparation method comprises the following steps: S1, preparing graphene oxide by a hummers method; S2, preparing a directionally arranged graphene oxide-based porous photo-thermal material; and S3, preparing a hydrophilic and oleophobic graphene oxide-based porous photo-thermal material. According to the invention, directional freezing and simple carbonization are taken as main means, and a synthesis method of the graphene oxide-based porous photo-thermal material which can efficiently generate solar steam and has aligned channels and oleophobicity is introduced; the invention further provides the application in seawater desalination and (oil-containing or dye-containing) wastewater purification treatment; and the graphene oxide-based porous photo-thermal material disclosed by the invention has relatively high solar energy conversion efficiency and excellent salt resistance and pollution resistance, and has a certain practical application value in the aspects of seawater desalination and (oil-containing and dye-containing) wastewater purification treatment in the future.