366 results about "Photoelectric conversion efficiency" patented technology

The application discloses a perovskite solar cell passivated by a sulfur-containing passivation agent, and a passivation layer is formed on an APbX3 peroviskite film by using the sulfur-containing passivation agent. 2+ S in the sulfur-containing passivation agent interacts with the weakly acidic Pb as a Lewis base, and H in the passivation molecule can form a hydrogen bond with the nearby iodide to further strengthen the interaction, reduce the surface defect density of the APbX3 peroviskite film, improve the interface energy level matching between the peroviskite and the charge transport layer, reduce the environmental resistance of the peroviskite solar cell, and greatly improve the photoelectric conversion efficiency and stability of the APbX3 peroviskite solar cell.

This invention provides a low-temperature sintering silver paste for solar cells, its sintering method, and its application. The low-temperature sintering silver paste comprises: 70 wt.%–90 wt.% micro / nano silver powder, 5 wt.%–20 wt.% organic carrier, and 1 wt.%–10 wt.% Ni-based coated glass powder; wherein the micro / nano silver powder comprises 60 wt.%–80 wt.% micron-sized silver spheres with a particle size of 1–3 μm and 20 wt.%–40 wt.% nano-sized silver spheres with a particle size of 20–80 nm; the Ni-based coated glass powder consists of Bi-B-Si glass powder and a magnetic Ni-based alloy coating layer coated with the Bi-B-Si glass powder. This invention introduces micro-nano silver powder and Ni-based coated glass powder into the silver paste. The Ni-based alloy coating layer is magnetic, which enhances the magnetic properties of the glass powder. By combining micro-nano silver powder with electromagnetic field composite sintering technology, the silver paste is rapidly and densely sintered at a lower temperature, which effectively improves electrode conductivity, reduces contact resistance, and enhances contact performance with the silicon substrate, thereby improving photoelectric conversion efficiency and shortening sintering time.

This utility model discloses a plug-in type solar-powered multifunctional courtyard light pole, including a light pole body and a lighting fixture. The light pole body has mounting positions arranged in a circular array around its perimeter, and solar panels are plugged into these positions via a plug-in structure to accommodate multi-faceted lighting at different times of day. The lighting fixture is mounted on top of the light pole body via a connecting flange, providing nighttime illumination. This utility model concentrates solar panels onto the light pole in a plug-in manner, adapting to multi-faceted lighting at different times of day, enhancing photoelectric conversion efficiency, and is suitable for urban secondary roads, park trails, residential areas, campuses, etc.

This invention belongs to the field of perovskite solar cell technology, specifically providing a method for preparing a perovskite thin film, comprising: A) depositing a lead-containing precursor film on a pretreated substrate; B) subjecting the lead-containing precursor film to a first reaction in a liquid environment of an organic ammonium salt to form a pre-converted film; C) placing the pre-converted film in a vapor environment of an organic ammonium salt to a second reaction to form a perovskite thin film. This invention first utilizes a low-concentration liquid-phase reaction to construct a porous initial conversion layer, avoiding the "shell effect," and then utilizes the excellent permeability of gas phase molecules to achieve complete and uniform conversion of the precursor film from the inside out. The resulting perovskite thin film has no PbI2 residue, large grain size, and high coverage. Solar cell devices based on this film show an absolute increase in photoelectric conversion efficiency of over 1.5%, batch repeatability improvement of over 40%, and significantly enhanced operational stability.

The application discloses a perovskite solar cell based on a 4-carboxyphenylhydrazine hydrochloride modified hole transport layer. A co-self-assembly monolayer is constructed by adding 0.05-0.20 mg / mL of 4-carboxyphenylhydrazine hydrochloride to a Ph-4PACz solution, and the co-assembly behavior of the 4-carboxyphenylhydrazine hydrochloride and the Ph-4PACz is utilized to inhibit the pi-pi stacking aggregation of rigid conjugated groups, repair the long-range ordered charge transport channel in the molecular layer, improve the hole extraction and transport characteristics, and at the same time, the 4-carboxyphenylhydrazine hydrochloride can synergistically passivate the uncoordinated Pb 2+ defects and deep energy level Pb 0 defects, reduce the interface non-radiative recombination loss, and improve the perovskite thin film crystallization quality. The application synchronously optimizes the charge transport characteristics and the interface passivation effect, significantly improves the photoelectric conversion efficiency and the device stability of the perovskite solar cell, and has certain guiding significance for manufacturing large-area perovskite solar cells.

The application provides a perovskite solar cell, a photovoltaic module, an electric device and a power generation device. The perovskite solar cell comprises a first electrode, a composite perovskite layer and a second electrode; the composite perovskite layer is arranged between the first electrode and the second electrode; the composite perovskite layer comprises a perovskite material and an organic compound; the organic compound comprises anions and cations; and the cations of the organic compound have structures shown in formula (1) or (2). The perovskite solar cell has high photoelectric conversion efficiency.

This invention relates to a perovskite solar cell doped with a disulfonic acid-based functionalized ionic liquid and its preparation method. By doping a perovskite precursor solution with a disulfonic acid-based functionalized ionic liquid, this invention effectively controls the crystallization process of perovskite, reduces lead iodide residue, and prepares a perovskite film with better crystallinity, larger and more uniform grain size, and a smoother surface, thereby improving the stability of the perovskite film. Furthermore, the presence of disulfonic acid groups in the ionic liquid anchors uncoordinated Pb ions, inhibits ion migration, and passivates defect states in the perovskite material, significantly improving the quality of the perovskite film and thus enhancing the photoelectric conversion efficiency and long-term stability of the solar cell. Simultaneously, after perovskite film formation, the ionic liquid is mainly distributed at the upper and lower interfaces, achieving synergistic passivation of the two interfaces of the perovskite film, further improving the photoelectric conversion efficiency and long-term stability of the solar cell.

This invention discloses an amino compound containing a carbazole derivative and its synthesis method, as well as a perovskite solar cell and its preparation method, belonging to the field of solar cell technology. The general chemical formula of the amino compound of this invention is as follows: Wherein: R1 is a straight-chain alkyl group, with 3 to 4 carbon atoms; R2 is a straight-chain alkyl group, with 3 to 4 carbon atoms. Based on the introduction of long-chain alkyl groups and carbazole groups, both water and oxygen barrier properties and electron transport capabilities can be improved simultaneously, thereby enhancing the stability and photoelectric conversion efficiency of perovskite solar cells and solving the problem of poor stability in existing perovskite systems.

This invention relates to the field of battery technology and discloses a solar cell structure, comprising, in sequence: a conductive substrate, a hole transport layer, an active layer, an electron transport layer, and a back electrode layer. The back electrode layer includes a functional layer, a main conductive layer, and a protective layer stacked sequentially, wherein the functional layer is located between the main conductive layer and the electron transport layer; the main conductive layer is a conductive metal layer used for charge transport; the functional layer is used to prevent metal ions in the main conductive layer from migrating towards the electron transport layer; and the protective layer is a dense layer used to protect the main conductive layer. This invention utilizes the protective layer to protect the main conductive layer, preventing corrosion and maintaining its chemical stability. The main conductive layer, being a conductive metal layer, can construct low-loss carrier channels. The functional layer can prevent metal ions in the main conductive layer from migrating towards the electron transport layer, reducing contact resistance and significantly improving the photoelectric conversion efficiency and lifespan of the solar cell structure.

The embodiment of the present application relates to the photovoltaic field, and provides a back contact solar cell, a preparation method thereof, a laminated cell and a photovoltaic module. The back contact solar cell comprises: a substrate comprising opposite front and back surfaces, the back surface comprising a first region and a second region; a tunneling oxide layer, a first doped polysilicon layer and a first passivation structure which are stacked on the first region, the first passivation structure comprising a first porous layer, the first porous layer having a plurality of pores; a hydrogenated silicon oxide structure, a doped conductive layer and a transparent conductive layer which are stacked on the second region, the doped conductive layer being different from the first doped polysilicon layer in doping type; a first electrode located on a side of the first passivation structure away from the first doped polysilicon layer and electrically connected with the first doped polysilicon layer; and a second electrode located on a side of the transparent conductive layer away from the doped conductive layer and electrically connected with the doped conductive layer. The solar cell provided by the embodiment of the present application can at least improve the photoelectric conversion efficiency of the solar cell.

The application provides a perovskite / crystalline silicon laminated solar cell preparation method, a cell and application. The body heterojunction film layer obtained by mixing N-type SAM and P-type SAM is used as a core tunneling layer, the performance of the tunneling layer is precisely optimized, the defects of a traditional technical solution are effectively solved, the photoelectric conversion efficiency and stability of a device are improved, and the perovskite / crystalline silicon laminated solar cell prepared by the method can be well applied to the field of space photovoltaics.

The application discloses a solar cell and a photovoltaic device, an electric device and a power generation device. The solar cell comprises a first electrode and a first charge transport layer. The first electrode comprises a first metal oxide layer, a second metal oxide layer, a metal layer and metal nanoparticles. The metal layer is arranged between the first metal oxide layer and the second metal oxide layer. The metal nanoparticles are located between the second metal oxide layer and the first charge transport layer. The application utilizes the metal nanoparticles to improve the photoelectric conversion efficiency of the solar cell.

The application relates to the field of solar cells, in particular to a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a conductive substrate, a hole transport layer, a perovskite active layer, a passivation layer, an electron transport layer and a back electrode which are sequentially stacked; the material of the perovskite active layer comprises SAM material, ionic liquid and perovskite material; the SAM material comprises a carbazole self-assembled monolayer material containing amino and / or phosphonic acid groups; the ionic liquid contains BF4 ‑ anions and pyridine cations. The application aims at the problem that a single passivation technology in the prior perovskite solar cell cannot simultaneously solve the problems of bulk phase and interface defects, and provides a multifunctional SAM material and ionic liquid blended perovskite solar cell preparation method, a bulk phase-interface continuous passivation network is constructed, a double-stage passivation effect is realized, and the photoelectric conversion efficiency and long-term stability of the cell are significantly improved.

This application relates to the field of solar cell technology, and more particularly to a perovskite solar cell and its fabrication method, as well as a photovoltaic module. The fabrication method of the perovskite solar cell includes: a first carrier transport layer disposed on a surface of a conductive substrate; forming a perovskite thin film by depositing a perovskite precursor solution on the surface of the first carrier transport layer; during the film formation process, a protective gas is introduced into the environment, the gas flow of which forms an acute angle with the surface of the first carrier transport layer. This protective gas protects the environmental atmosphere during the perovskite thin film fabrication process, accelerates the evaporation of volatile solvents, reduces organic solvent residue, and forms a continuous and uniformly thick large-area perovskite thin film, thereby improving the photoelectric conversion efficiency and stability of the perovskite solar cell device and promoting the industrialization of perovskite solar cells.

The embodiments of the present application provide a silicon wafer, a silicon rod, a cell, and a cell assembly. At least one surface of the silicon wafer is provided with a plurality of stripes; the stripes extend with reference to a first direction, and the plurality of stripes are arranged at intervals in a second direction; the peak-to-valley height difference Rt of the surface profile of the middle region of the surface satisfies: 2 μm ≤ Rt ≤ 8.5 μm; the first direction is the extension direction of a first side edge of the silicon wafer, and the second direction is the extension direction of a second side edge of the silicon wafer; and the middle region refers to a region at least L / 3 away from the first side edge of the silicon wafer in the second direction, wherein L is the length of the second side edge. The flatness of the surface of the silicon wafer is relatively uniform, which can improve the photoelectric conversion efficiency of a cell to which the silicon wafer is applied.

The embodiment of the present application provides an IBC battery aluminum paste and an IBC battery, wherein the IBC battery aluminum paste provided by the embodiment of the present application comprises an organic additive, boron powder, aluminum powder, gallium powder, glass powder and an organic binder. By adding gallium powder in the aluminum paste, because the gallium element has etching effect and high density, it is faster than aluminum to drop to the silicon surface in the sintering process, so that the Ga-Si contact probability is increased, the contact resistance of the paste and the battery is reduced, and a high open circuit voltage can be maintained. At the same time, because part of the aluminum powder is replaced by gallium, the content of aluminum is reduced, which is beneficial to reducing the side effect of Al, so that the Al-Si reaction is weakened, the formed aluminum silicon corrosion pit is shallow, the recombination is reduced, so as to improve the open circuit voltage and the photoelectric conversion efficiency of the battery. Therefore, the problem that the existing IBC battery aluminum paste is easy to form metal recombination in the cooling process after being sintered into a positive electrode grid line, resulting in the decrease of the open circuit voltage and the photoelectric conversion efficiency of the battery piece is solved.

The application provides a perovskite solar cell, a photovoltaic module, an electric device and a power generation device. The perovskite solar cell comprises a first electrode, a composite perovskite layer and a second electrode; the composite perovskite layer is arranged between the first electrode and the second electrode; the composite perovskite layer comprises a perovskite material and a piperazine derivative, the piperazine derivative comprises anions and cations, and the cations of the organic compound have the structure shown in formula (1). The perovskite solar cell has high photoelectric conversion efficiency.

This invention relates to the field of photovoltaic technology, and discloses a frame, a photovoltaic module, and a photovoltaic system. The frame, used in a photovoltaic module, includes a frame body and a support member. The frame body extends along a first direction and includes a side plate and a bottom plate. The bottom plate forms a limiting fit with the backlight surface of a laminate along a second direction. The side plate is perpendicular to the bottom plate along the second direction, and the side of the side plate away from the bottom plate is bent towards the laminate to form a flange. The flange forms a limiting fit with the laminate along a third direction. The side plate and the bottom plate together enclose a receiving space with the laminate, and the receiving space is filled with a flexible fixing member. The support member extends along the first direction and is connected to the side of the bottom plate away from the laminate. This frame can prevent dust accumulation on the light-receiving surface of the laminate, avoiding dust obstructing the solar cells in the laminate, thereby ensuring the photoelectric conversion efficiency and power generation stability of the photovoltaic module.

The present application relates to the technical field of photovoltaic devices, and discloses a multi-source energy storage type photovoltaic energy-saving mushroom house heat pump drying device, which comprises a mushroom house, a heat pump and an energy storage device arranged on the left side of the mushroom house, and further comprises a cleaning part, a cleaning part and a vibration part; the cleaning part is installed on the mushroom house; the cleaning part is arranged on the mushroom house; the vibration part is installed on the top of the mushroom house; the cleaning part comprises a cleaning assembly and a collecting assembly; the cleaning assembly and the collecting assembly are arranged on the mushroom house; the cleaning assembly comprises a fixing block, an adjusting plate, a photovoltaic panel, a triangular block group one, a motor one and a screw rod. The present application solves the problem that the existing photovoltaic energy-saving mushroom house heat pump drying device is in the open air for a long time, and the photovoltaic panel is easily covered with dust and other impurities, which will cause the photoelectric conversion efficiency of the photovoltaic panel to decrease significantly, thereby affecting the power generation capacity of the whole device and the economy of the drying operation.

The invention discloses an integrated photovoltaic curtain wall system, and relates to the technical field of photovoltaic curtain walls. The system comprises a supporting frame, the supporting frame comprises a plurality of stand columns installed on a building main body structure and a plurality of supporting arms fixed to the stand columns, the stand columns are arranged at equal intervals, the supporting arms are perpendicular to the stand columns, and the supporting arms are arranged along the stand columns at equal intervals; the photovoltaic assembly comprises a first keel, a second keel connected to the lower end of the first keel and a photovoltaic panel installed on the first keel, and the outer end of the first keel and the outer end of the second keel are connected to the vertically adjacent supporting arms respectively. The lower portion of the first keel and the upper portion of the second keel incline in the direction away from the building main body structure. The heat dissipation effect of the photovoltaic panel is improved in a high-temperature environment in summer, the photoelectric conversion efficiency of the photovoltaic panel is improved, and meanwhile, the influence of high-temperature air gathered at the rear part of the photovoltaic panel on the room temperature of the internal space of a building can be reduced.

The present application relates to a kind of perovskite solar cells and its passivation method, the electron blocking layer is made of acyl chloride group derivative, on the one hand, the carbonyl group in acyl chloride group can be coordinated with the Pb 2+ Ion forms Lewis acid-base pair, thereby significantly reduce the defect state density of perovskite surface.Let go of group Cl ‑ Ion can increase the grain size of perovskite, improve the crystalline quality of perovskite layer.In addition, acyl chloride group and perovskite component reaction generates electron blocking layer cesium acetate, reduces the charge recombination at interface, while it can promote energy level gradient arrangement, effectively improve the separation and extraction capacity of carrier, successfully improve the photoelectric conversion efficiency and stability of carbon-based hole-free all-inorganic perovskite solar cell, and significantly reduce the hysteresis effect.The present application process is simple and has universality, is conducive to promoting the commercialization of perovskite, has wide market demand and application prospect.

The application discloses a perovskite solar cell and a preparation method thereof, a photovoltaic module, an electric device and a power generation device. The perovskite solar cell comprises a perovskite layer, a charge transport layer and a functional layer between the perovskite layer and the charge transport layer; the functional layer comprises M2O3 and MF3, wherein M represents a trivalent inorganic cation; the perovskite layer comprises a perovskite type metal halide containing a divalent inorganic cation; and the perovskite layer further comprises fluoride ions and trivalent inorganic cations. The perovskite solar cell provided by the application has high photoelectric conversion efficiency.

The application discloses a kind of high double-side rate silver paste for solar TopCon back fine grid, belong to solar cell technical field.The silver paste is by micron, submicron, nanometer spherical silver powder, glass powder, organic dispersant, thixotropic agent, silicone oil, organic solvent, titanate additive and organic carrier according to specific ratio composition.By adding 0.4%~0.7% titanate additive, cooperate with multistage silver powder grading and low corrosion glass powder system, effectively solve the narrow line width printing easy to block net, virtual printing broken grid problem, reduce the poly layer corrosion and carrier recombination of silicon wafer.The silver paste printing stability, grid line height-width ratio is optimal, light transmittance is good, can significantly improve the double-side rate of battery and photoelectric conversion efficiency, provides high-performance back fine grid conductive paste scheme for N-type high-efficiency photovoltaic cell.

The application relates to the field of photovoltaic technology and discloses a passivated contact solar cell and a preparation method thereof. The preparation method comprises the following steps: providing a substrate layer with opposite first and second surfaces; forming an oxide layer on the first surface of the substrate layer; performing laser sintering treatment on the surface of the oxide layer; forming a first doped layer on the oxide layer after the laser sintering treatment; forming a second doped layer on the second surface of the substrate layer; forming a first electrode connected with the first doped layer on the first surface side of the substrate layer; and forming a second electrode connected with the second doped layer on the second surface side of the substrate layer. In the application, the laser sintering treatment on the oxide layer realizes accurate optimization of the surface of the oxide layer, improves the surface and interface characteristics, further reduces the surface recombination rate of the oxide layer and the substrate layer and the first doped layer, improves the carrier lifetime, and thus the photoelectric conversion efficiency and stability of the cell are improved, and the power generation efficiency is improved.

The utility model discloses a photovoltaic inverter and system for cadmium telluride glass power generation in a building integrated photovoltaics (BIPV), and relates to the technical field of cadmium telluride photovoltaic power generation, the photovoltaic inverter is electrically connected with unique cadmium telluride glass, and the photovoltaic inverter comprises a stabilizing circuit; a conversion circuit; and a control circuit. According to the utility model, each piece of cadmium telluride glass is provided with the photovoltaic inverter, and the photovoltaic inverter is utilized to carry out disturbance adjustment on the photoelectric conversion efficiency of the cadmium telluride glass according to the photoelectric conversion efficiency of the cadmium telluride glass by collecting the real-time working state of the cadmium telluride glass; the cadmium telluride glass can meet the maximum photoelectric conversion output of the cadmium telluride glass, then can meet the power generation requirement and the energy storage requirement of building photovoltaic integration, and effectively improves the photoelectric conversion efficiency of the cadmium telluride glass. The defect that a traditional high-power photovoltaic inverter cannot meet the power generation processing requirement of cadmium telluride glass in the prior art is effectively overcome.

The present application relates to a kind of high efficient stable perovskite solar cell based on chlorophyll derivative and preparation method thereof, belong to perovskite solar cell technical field.Solve the problem that the photoelectric conversion efficiency and stability of existing perovskite solar cell still need to be further improved.The perovskite solar cell of the present application includes transparent conductive glass anode, hole transport layer, chlorophyll derivative lower layer containing trifluoroacetate and central copper ion, perovskite layer, chlorophyll derivative upper layer containing trifluoroacetate and central copper ion, electron transport layer, hole blocking layer and metal cathode in turn from bottom to top.The present application sets up chlorophyll derivative layer as interface modification layer by being arranged in the upper and lower of perovskite layer, and by selecting suitable chlorophyll derivative containing trifluoroacetate and central copper ion as chlorophyll derivative layer material, further improve the photoelectric conversion efficiency and stability of perovskite solar cell, and its photoelectric conversion efficiency is as high as 26.34%.

The application discloses a low-temperature conductive paste and application thereof. The low-temperature conductive paste comprises silver-coated copper powder 68-88%, spherical silver powder 2-20%, organic binder 2-5%, auxiliary agent 0.5-2.5% and solvent 2-6%, and the total silver content is 6-33%; the silver-coated copper powder comprises a copper core and a silver layer coated on the outer surface of the copper core, and the ratio of the grain size of the copper core to the average particle size D50 is 0.015-0.4. The copper core grain boundary of the silver-coated copper powder is moderate, the silver layer is continuous and dense, and the silver-coated copper powder has good sintering activity and conductivity during low-temperature solidification. The low-temperature conductive paste is printed on a heterojunction cell sheet, and conductive grid lines are formed through low-temperature solidification, so that the photoelectric conversion efficiency is 0.03-0.1% higher than that of traditional silver-coated copper paste, long-term reliability is excellent, and the low-temperature conductive paste is suitable for low-silver-content photovoltaic conductive paste.

This invention discloses a MIL-100(Fe)-CdS-sodium alginate composite film for long-term photocathode protection in seawater environments and its preparation method, belonging to the field of photocathode protection technology. The method includes the following steps: cleaning conductive glass; growing a MIL-100(Fe) thin film on the conductive glass using a hydrothermal method; growing a MIL-100(Fe)-CdS composite film on the surface of the MIL-100(Fe) thin film using a dip-coating method; and growing sodium alginate (SA) hydrogel on the surface of the MIL-100(Fe)-CdS using an in-situ drop-coating method. This invention utilizes the heterojunction of MIL-100(Fe) and CdS, and uses a loaded sodium alginate hydrogel as a protective layer, solving the problem of severe photoelectric conversion efficiency degradation in existing photoanodes during long-term seawater immersion. After coupling with a metal, the current generated under illumination causes cathodic polarization of the metal, and the hydrogel layer delays the loss of active materials. The synergistic effect of these two factors results in long-term stable photochemical cathodic protection performance in seawater environments.

The application relates to the technical field of solar cells, in particular to a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell provided by the embodiment of the application comprises a buffer layer, the buffer layer is arranged between an electrode structure and a carrier functional layer, and the buffer layer comprises a polyethylene imine derivative. The long-chain structure of the polyethylene imine derivative can physically block high-energy particles in a sputtering process, significantly reduce the physical damage to an organic charge transport layer and a perovskite active layer of an underlying layer, eliminate the negative influence of transparent electrode preparation, improve the transmission and extraction of electrons in the perovskite solar cell, improve the photoelectric conversion efficiency and stability of the perovskite solar cell, and reduce the photoelectric conversion efficiency decay rate.