243results about How to "Improve photoelectric conversion efficiency" patented technology

This invention discloses an integrated pump source and system. The integrated pump source includes: a pump source for generating pump light; multiple collimating lens groups, each corresponding to a light source module, for collimating the pump light emitted by the corresponding light source module; a beam splitter disposed in the output light path of at least one of the collimating lens group, focusing lens, and reflector, for splitting at least one of the output light to form a first-level pump light and a second-level pump light; a reflector disposed in the output light path of the collimating lens group and / or the beam splitter, for deflecting and guiding at least a portion of the output light; a focusing lens disposed in the output light path of the reflector and / or the beam splitter, for focusing the output light; a first output pigtail for receiving the focused first-level pump light and outputting it outward; and a second output pigtail for receiving the focused second-level pump light and outputting it outward.

This utility model discloses a BIPV module based on crystalline silicon heterojunction solar cells, including a light-transmitting first support plate group, a battery module, and a light-transmitting or opaque second support plate group. The battery module includes multiple battery strings arranged side by side and parallel to each other. Each battery string has an insulating layer on its edge wall near the adjacent battery string. The first support plate group, the battery module, and the second support plate group are stacked in sequence. This design can flexibly adjust the spacing between battery strings and the module size, improve photovoltaic conversion efficiency, and is flexible and reliable in use.

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 utility model relates to a solar cell. The solar cell includes: a substrate; the grid lines are fixedly arranged on the substrate; and a plurality of attachment blocks, the plurality of attachment blocks are fixedly arranged on two sides of the grid line in a staggered manner along the length direction of the grid line, and the plurality of attachment blocks are fixedly arranged on the substrate. The adhesion blocks arranged on the two sides of the grid line of the solar cell in a staggered manner can enhance the fixing strength of the grid line on the substrate, so that the grid line is not easy to fall off from the substrate, the conductivity of the grid line is improved, and the photoelectric conversion efficiency of the solar cell is improved.

The invention discloses a perovskite solar cell and a preparation method thereof, a laminated solar cell, a cell module and an electric device. The perovskite solar cell comprises a perovskite active layer, and the perovskite active layer comprises a perovskite structure substance and alkali metal fluorate. The perovskite active layer in the perovskite solar cell is doped with alkali metal fluorate, so that directional growth of perovskite grains can be effectively promoted, grain boundary defects of the perovskite active layer are reduced, bulk phase defects are passivated, non-radiative recombination of the perovskite active layer is reduced, and the photoelectric conversion efficiency of the perovskite solar cell is obviously improved. And moreover, a lattice structure can be effectively strengthened, material decomposition is inhibited, lattice vacancies are filled, external erosion is blocked, and ion migration is inhibited, so that the long-term stability of the perovskite solar cell is obviously improved. The laminated solar cell, the cell assembly and the electric device all comprise perovskite solar cells.

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.

This invention discloses a glass powder for the main grid paste of TOPCon crystalline silicon solar cells and its preparation method. The glass powder is obtained by mixing glass frits A and B obtained after cold rolling at a mass ratio of 1.5 to 2:1, followed by secondary melting and cold rolling. Glass frit A includes PbO, SiO2, B2O3, Li2O, Na2O, etc., and glass frit B includes Bi2O3, SiO2, AgNO3, B2O3, Li2O, Na2O, etc. Distilled water is added to glass frit B during the batching process to fully combine AgNO3 with other oxides, and the mixture is dried to a viscous state before sintering. During the sintering process, laser-enhanced contact optimization technology is used to reduce AgO in the glass to silver microcrystals, thereby improving the electrical performance of the main grid lines. The printed solar cells exhibit reduced damp heat decay, resulting in high module reliability and improved photoelectric conversion efficiency while ensuring high welding tensile strength. The resulting glass powder does not excessively etch the silicon nitride and aluminum oxide passivation layers, and the prepared slurry can be sintered at 650-800℃, which can meet the requirements of the front and back main grid electrodes of TOPCon batteries.

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 invention provides a multi-component thin film evaporation film thickness monitoring and adjusting device and method and application, the multi-component thin film evaporation film thickness monitoring and adjusting device comprises a conveying module used for conveying a substrate so as to deposit a film layer on the moving substrate through a first evaporation source and a second evaporation source, the conveying module is provided with a position sensing module, and the position sensing module is used for sensing the position of the film layer on the moving substrate through the first evaporation source and the second evaporation source; a trigger signal is generated when the substrate enters the set area; the first film thickness monitoring module is used for acquiring the deposition speed of the first evaporation source and the thickness of a film layer deposited on the substrate; the second film thickness monitoring module is used for acquiring a reflection spectrum of the second evaporation source in a set area; and the control module is used for obtaining the film thickness according to the reflection spectrum of the second evaporation source through an inversion algorithm, and independently feeding back and controlling the real-time evaporation working condition. The thickness of materials with different evaporation rates is subjected to differential parallel monitoring, a closed-loop feedback system is formed, the film thickness monitoring accuracy is improved, and long-time operation of monitoring work is guaranteed.

The invention provides a crystalline silicon substrate processing method, a perovskite laminated solar cell and a photovoltaic module, and the processing method comprises the steps: providing a crystalline silicon substrate with line marks on the surface, and carrying out the first corrosion processing of the line marks through a first mixed solution containing HF, HCl and an ozone solution, and carrying out second corrosion treatment on the crystalline silicon substrate by using a second mixed solution containing NaOH, H2O2 and a texturing additive, carrying out texturing treatment on the crystalline silicon substrate by using a NaOH solution, and forming a textured structure formed by a plurality of pyramid micro-unit structures on the surface of the crystalline silicon substrate. According to the processing method, the height of the line marks on the surface of the crystalline silicon substrate can be effectively reduced to the level suitable for perovskite film forming, a uniform suede structure is formed, the film forming quality of a perovskite film layer is improved, and the photoelectric conversion efficiency and reliability of the perovskite laminated solar cell are improved.

The utility model relates to a photovoltaic assembly comprising a cell string, the cell string comprises a plurality of slice cells, and the cutting surface of each slice cell is provided with a passivation layer; the photovoltaic module further comprises a plurality of light conversion films, the light conversion films are arranged on the sides of the passivation layers of the slice battery pieces, and the side edges of the light conversion films extend to the surfaces of the slice battery pieces to cover the passivation layers. The light conversion film of the photovoltaic assembly is used for covering the passivation layer, so that the damage of ultraviolet light to the passivation layer is greatly reduced, the ultraviolet resistance of the passivation treatment part of the sliced battery piece is improved, the power of the photovoltaic assembly is increased, and the service life of the photovoltaic assembly is prolonged.

The invention discloses a hole transport layer and a preparation method thereof, a perovskite solar cell and an electric device, and belongs to the technical field of solar cells. The first solvent with the boiling point being 200-300 DEG C and the alcohol solvent with the boiling point being 55-85 DEG C are adopted as the composite solvent of the hole transport layer precursor solution to adjust the solvent evaporation rate and the SAM film layer state, the electric field with the specific direction and intensity is applied to promote SAM molecules to be directionally arranged, and the orientation of the SAM molecules can be adjusted and controlled from top to bottom; the continuity and uniformity of the hole transport layer are improved, the coverage rate of SAM molecules on the substrate is effectively improved, the photoelectric conversion efficiency of the device is improved, and the consistency of large-area assembly preparation is favorably realized.

The embodiment of the utility model discloses a solar cell, a cell assembly and a photovoltaic system. The solar cell comprises a silicon substrate and an electrode arranged on one side of the silicon substrate, and the electrode comprises a seed layer, a first metal layer and a second metal layer which are sequentially stacked in the direction away from the silicon substrate; the width of the first metal layer is larger than that of the seed layer in the width direction of the electrode. According to the embodiment of the utility model, the photoelectric conversion efficiency of the solar cell can be improved.

This invention discloses a perovskite thin film with surface defect passivation and a method for passivating surface defects in a perovskite thin film. The method includes the following steps: Step 1, taking 0.430~0.530 g PbI2, 0.170~0.190 g FAI, 0.075~0.085 g PbBr2, 0.015~0.025 g MABr and 0.015~0.020 g CsI, and dispersing them while stirring in a mixed solvent of 800 mL N,N-dimethylformamide and 200 mL dimethyl sulfoxide to prepare a perovskite precursor solution; Step 2, adding LiF to an organic solvent to prepare a solution with a concentration of 0.05~35 mmol L. ‑1 Additive solution A; Step 3: Uniformly drop-coat the perovskite precursor solution onto the FTO conductive glass substrate, and turn on the spin coater to coat it into a perovskite thin film; Step 4: In the last 10 seconds before the spin coater stops rotating, rapidly drop additive solution A onto the surface of the perovskite thin film, anneal it under an argon atmosphere, and after drying, obtain a perovskite thin film with passivated surface defects, which improves the solar energy utilization rate of the perovskite thin film, thereby improving the photoelectric conversion efficiency and stability of the perovskite solar cell.

The invention relates to the field of organic photoelectric materials, in particular to an organic compound, a mixture and an organic photovoltaic device. The invention provides an organic compound as shown in a general formula (I), the compound has a large conjugate plane, and is beneficial to delocalization of electrons and improvement of the glass transition temperature; meanwhile, close packing like linear molecules is inhibited by the three-dimensional structure, so that excessive crystallization is inhibited; finally, the structure of three electron-withdrawing end groups of the organic compound provided by the invention provides a multi-dimensional electron transport channel, improves the electron mobility and inhibits recombination. Therefore, when the compound is used as an acceptor material to be applied to an organic photovoltaic device, excellent photoelectric conversion efficiency is shown.

This invention relates to a tandem solar cell, its fabrication method, and its application. The tandem solar cell comprises a top layer of perovskite cells and a bottom layer of back contact cells stacked sequentially from top to bottom. The perovskite cells include a front glass layer, a first passivation layer, a perovskite composite layer, and a second passivation layer stacked sequentially from top to bottom. The perovskite composite layer includes at least two polar perovskite regions and perovskite electrodes disposed on both sides of each polar perovskite region in a first direction. The back contact cells include a back glass layer, a back electrode layer, and a crystalline silicon layer stacked sequentially from bottom to top. In the solar cell provided by this invention, the perovskite composite layer of the perovskite cell is designed with a specific structure using polar perovskite and perovskite electrodes to form a built-in electric field, driving the directional movement of electron-hole pairs to generate current. Combined with the introduction of the back contact cells, more solar radiation is received, thus improving the performance of the tandem solar cell.

The invention provides a preparation method of a tin-doped scaly nano gallium oxide thin film solar blind ultraviolet photoelectric detector. The preparation method comprises the following steps: carrying out cleaning pretreatment on a single crystal GaN substrate; depositing an Au thin film on the pretreated single crystal GaN substrate to serve as a catalyst layer; the preparation method comprises the following steps: mixing Ga2O3, diamond and SnO2 powder according to a certain mass ratio to prepare a precursor; putting the single crystal GaN substrate deposited with the Au thin film and a precursor into a CVD furnace, and growing according to preset gas flow, pressure intensity, reaction temperature and reaction time to obtain a tin-doped scaly nano gallium oxide thin film; and respectively preparing electrodes on the surface of the tin-doped scaly nano gallium oxide thin film and the surface of the GaN substrate by adopting a radio frequency magnetron sputtering method. The conductivity of the thin film is improved through tin doping, the specific surface area and light absorption are increased through the scaly nanostructure, high-performance deep ultraviolet photoelectric detection is achieved, and the technical problem that in the prior art, the dark current of a device is high is solved.

The invention relates to a perovskite solar cell. The perovskite solar cell comprises a perovskite light absorption layer and a light-emitting passivation layer arranged on the surface of the perovskite light absorption layer, and the light-emitting passivation layer has a zero-dimensional perovskite structure. The light-emitting passivation layer with the zero-dimensional perovskite structure has excellent environmental stability and is beneficial to protecting the perovskite light absorption layer, so that the environmental stability of the solar cell is improved, the high photoluminescence quantum yield of the light-emitting passivation layer is beneficial to reducing non-radiative recombination of current carriers, the efficiency of the solar cell is improved, and the service life of the solar cell is prolonged. Moreover, the introduction of the light-emitting passivation layer can prolong the service life of carriers of the solar cell, prolongs the transmission time of the carriers, and improves the photoelectric conversion efficiency of the solar cell.

The invention relates to the technical field of luminescent materials, in particular to a red fluorescent material, a preparation method and application thereof, a lower transfer layer and preparation of the lower transfer layer, the red fluorescent material has a chemical formula of K < 0.5 > La < 0.5 > Sr Mg < 1-x > (W < 1-y > Tey) < 1-z > O6: zMn < 4 + >, xLu < 3 + >, wherein 0 lt; x is less than or equal to 0.1, 0lt; y is less than or equal to 0.5, 0lt; and z < = 0.05. The material can be excited by visible light and near ultraviolet in sunlight and can emit red light at the same time, namely sunlight in the wavelength range of 300-600 nm is converted into dark red light in the wavelength range of 600-800 nm, the problem that a silicon-based solar cell is poor in short-wavelength photoelectric conversion efficiency is solved, and the photoelectric conversion efficiency of the silicon-based solar cell is improved.

The application discloses a kind of CsPbX3 quantum dot self-assembly film and its preparation method and application, method includes steps: step 1, preparation CsPbX3 quantum dot colloid solution, wherein: X is I or Br;Step 2, CsPbX3 quantum dot colloid solution is dropped in the liquid surface of polar solvent, and form spreaded film;Step 3, after the solvent volatilization in CsPbX3 quantum dot colloid solution, clean substrate is horizontally attached to the surface of film and stays 3~5 s, substrate is lifted, film is transferred to the surface of substrate, dry, and obtain CsPbX3 quantum dot self-assembly film.The application effectively improves the packing order of quantum dot, and improves the photoelectric performance of quantum dot film.

This application provides a photovoltaic component, including: a color steel tile; a photovoltaic module, including a laminate and a frame, the frame being fixed to the back surface of the laminate; a clamp, including a clamping part for clamping the color steel tile along a first direction; and a fixing member along a second direction, one end of the fixing member being connected to the clamping part and the other end being connected to the frame, to fix the photovoltaic module to the color steel tile; the first direction and the second direction are perpendicular to each other. The photovoltaic component of this application can improve the photoelectric conversion efficiency of the photovoltaic module, thereby increasing the output power of the photovoltaic component. The fixing member connecting the clamp and the photovoltaic module along the second direction allows the photovoltaic module to be adapted to color steel tiles of different widths, providing high flexibility and increasing the installed capacity of photovoltaic modules per unit area, thus contributing to increasing the power generation capacity of the photovoltaic component.

This invention provides a photovoltaic encapsulating film, its preparation method, and its application. The photovoltaic encapsulating film of this invention comprises a first encapsulating film layer and a second encapsulating film layer stacked sequentially. The first encapsulating film layer comprises a matrix resin and an anti-potential-induced degradation agent package. The second encapsulating film layer comprises a matrix resin and a composite reflective system, wherein the composite reflective system comprises a modified high-refractive-index pigment and hollow microspheres. The modified high-refractive-index pigment comprises titanium dioxide with a coating layer, wherein the coating layer is an inorganic-organic composite coating layer. The first encapsulating film layer is configured to directly contact a solar cell. The photovoltaic encapsulating film of this invention possesses both high resistance to potential-induced degradation and high light reflectivity, which can improve the photoelectric conversion efficiency and lifespan of photovoltaic modules when used in photovoltaic modules.

The application provides a photovoltaic module and a photovoltaic system, relates to the field of photovoltaic facilities, and aims at the problem that the existing multi-fragment photovoltaic module appears stress concentration due to the middle busbar and the outgoing line design. The application introduces an insulation jumper to sequentially connect a plurality of power generation units, cooperates with the busbar leading-out end and the busbar belt at the long side end, changes the traditional current leading-out path, transfers the outgoing line and the collection structure originally concentrated in the middle part of the module to the edge of the module, thereby avoiding the process requirement of punching holes in the middle part of the glass and a large number of busbar interweaving and overlapping, releasing the space in the middle part of the module, reducing the structural obstruction to the back cell, and helping to improve the overall photoelectric conversion efficiency of the module. The application solves the stress concentration phenomenon in the middle part and reduces the risk of hidden cracking or breaking of the module in the process of carrying, installation and operation.

This invention relates to the field of wearable electronic device technology, specifically disclosing a partitioned, double-sided, skin-contact, sweat-wicking hybrid energy harvesting armband and its manufacturing method. The armband includes a flexible strip substrate, an organic photovoltaic (PV) power generation unit, a polymer thermoelectric power generation unit, a skin-contact thermal interface layer, a cold-end heat dissipation structure, and a circuit integration module. The PV power generation unit and the polymer thermoelectric power generation unit are partitioned and mounted on the same flexible strip substrate. Microstructured channels are pre-set within the skin-contact thermal interface layer to guide sweat and reduce contact thermal resistance. A process route is adopted where the organic PV is first fabricated and encapsulated with high barrier properties, followed by the printing of the polymer thermoelectric power generation unit. A porous fabric or fin array heat dissipation structure is integrated at the cold end of the polymer thermoelectric power generation unit. This invention can improve photoelectric conversion efficiency, stabilize operating temperature difference, reduce contact thermal resistance, increase manufacturing yield, enhance output power, and improve wearing comfort.

The present invention addresses the problem of providing a photoelectric conversion element with improved photoelectric conversion efficiency. To solve this problem, the present invention is a photoelectric conversion element (1) having a first electrode (7), a second electrode (3), and a photoelectric conversion layer (5) disposed between the first electrode (7) and the second electrode (3) and comprising a crystal having a perovskite structure, wherein a charge transport layer (6) is disposed between the photoelectric conversion layer (5) and the first electrode (7), and the charge transport layer (6) is formed on the surface of the photoelectric conversion layer (5) by charge transport particles and an insulating resin.

The application relates to the technical field of solar cells, in particular to a laminated solar cell. Embodiments of the application provide a laminated solar cell, which comprises, from the front surface to the back surface, a perovskite top cell, an interface layer and a crystalline silicon bottom cell which are sequentially stacked; the crystalline silicon bottom cell comprises, from the front surface to the back surface, a first passivation layer, a second passivation layer, a silicon substrate, a silicon oxide layer, a doped polycrystalline silicon layer, a transparent conductive layer and a back surface metal electrode which are sequentially stacked; the first passivation layer comprises at least one of a doped amorphous silicon layer, a doped nanocrystalline silicon layer or a doped microcrystalline silicon layer; and the second passivation layer is an intrinsic amorphous silicon layer. The laminated solar cell provided by the application has almost no parasitic absorption in the wavelength range of more than 750 nm, so that the laminated solar cell has good passivation effect and current gain, and the photoelectric conversion efficiency of the laminated solar cell is improved.

The application discloses a method for preparing a perovskite cell by modifying an electronic transmission layer with a natural organic molecule, and relates to the technical field of photovoltaic devices. The technical scheme is as follows: tin dioxide solution is mixed with ectoine, and after ultrasonic treatment, a mixed solution of tin dioxide and ectoine is obtained by filtration; an ITO transparent conductive glass substrate which is cleaned and dried is subjected to ozone treatment, and then an Ec-SnO2 electronic transmission layer is deposited on the treated ITO substrate; a perovskite precursor solution is prepared, a perovskite thin film is prepared on the ITO substrate by using a spin coating method, and then is transferred to a heating table to perform annealing; a hole transmission layer is spin-coated on the perovskite thin film; finally, a silver electrode is deposited on the hole transmission layer by using a thermal evaporation technology. The method significantly improves the photoelectric conversion efficiency and stability of the perovskite solar cell, and the manufacturing process is simple and has low difficulty.

The embodiment of the invention provides a slit coating system and a slit coating method, the system comprises a base table, a coating area is arranged on the surface of the base table, the coating area comprises a first temperature control area and a second temperature control area, and the second temperature control area is arranged around the first temperature control area; the coating head is arranged above the base station; the control unit is used for controlling the temperature of the first temperature control area and the temperature of the second temperature control area to be a first target temperature when the coating head coats the substrate borne on the base table; and after the coating head coats the substrate, the temperature of the first temperature control area is controlled to be the second target temperature, or the temperature of the second temperature control area is controlled to be the third target temperature, so that the uniformity of the functional film layer formed based on the slit coating process is improved.

This invention provides an organic eutectic material with a controllable charge-transfer exciton diffusion coefficient and its preparation method. The molecular formula of this organic eutectic material is (TSB). x (TSB-Br) 1‑x (TCNB)2, wherein TSB is trans-1,2-stilbene, TSB-Br is trans-4-bromostilbene, TCNB is 1,2,4,5-phenylenetetraacetonitrile, and x is the proportion of TSB molecules. The organic eutectic material prepared by this invention has a regular morphology, high crystallinity, and exhibits both strong and delayed fluorescence emission, with continuously tunable diffusion coefficients for singlet and triplet charge-transfer excitons. The preparation method described in this invention has advantages such as low raw material cost, mild conditions, and simple operation. The prepared (TSB)2... x (TSB-Br) 1‑x (TCNB)2 organic eutectic materials have potential applications in fields such as imaging, photoelectric conversion, and spintronics.

This application relates to perovskite solar cells, their fabrication methods, and electrical devices. The perovskite solar cell of this application comprises a first hole transport layer, a second hole transport layer, and a perovskite layer stacked together, with the second hole transport layer located between the first hole transport layer and the perovskite layer. The material of the first hole transport layer includes nickel oxide; the raw materials of the second hole transport layer include self-assembled monolayer materials and additives; the additives include ester compounds having phosphate groups and multiple alkenyl groups. The perovskite solar cell of this application can solve the problem of insufficient passivation of nickel oxide surface defects by self-assembled monolayer materials, thereby simultaneously achieving high photoelectric conversion efficiency and device stability.