32results about How to "Improve FF" patented technology

A solar cell includes a p-n structure having a first conductive semiconductor substrate, a second conductive semiconductor layer formed on the first conductive semiconductor substrate and having a conduction opposite to the first conductive semiconductor substrate, and a p-n junction formed at an interface between the first conductive semiconductor substrate and the second conductive semiconductor layer; a passivated layer formed on the second conductive semiconductor layer and composed of silicon oxynitride with a refractive index of 1.45 to 1.70; an anti-reflection film formed on the passivated layer and composed of silicon nitride; a front electrode connected to the second conductive semiconductor layer with passing through a part of the passivated layer and the anti-reflection film and exposed outward; and a rear electrode formed at an opposite side to the front electrode with the first conductive semiconductor substrate being interposed therebetween to be connected to the first conductive semiconductor substrate.

The invention discloses a PERC solar cell structure and a preparation process thereof. The PERC solar cell structure comprises a cell piece body. A SiO2 layer, an anti-reflection layer and an AlOx layer are successively deposited / grown on the front surface of the cell piece body. An AlOx layer and a SiNx layer are successively deposited on the back surface of the cell piece body. On the basis of a conventional PERC cell preparation process, a surface oxidation doping process is used. In addition, the PERC battery process is adjusted. A unique surface passivation layer deposition process is also used. The beneficial effect of the preparation process is that effective doping in an oxidation process improves the surface impurity concentration of the cell, improves the FF of the cell, compensate the deterioration of the FF due to the local contact on the back surface; and the adjustment of the PERC cell process solves edge electric leakage due to doping process so as to simply the process, thereby improving the conversion efficiency of the cell and providing a better hydrogenation effect for the subsequent photonic recovery process of the PERC battery so as to achieve anti-LID.

A conductive paste for solar cell electrodes with which high FF value can be obtained stably, and a method for producing a solar cell using the same are provided. The conductive paste is a conductive paste for solar cell electrodes which includes an organic binder, a solvent, conductive particles, glass frits, and (A) a substance which changes into a gas at a temperature in the range of 150 to 800 DEG C, and a metal oxide, (B) an organometallic compound and a metal oxide, or (C) a compound containing Al, Ga, In or Tl.

Provided is a substrate for a thin-film photoelectric conversion device which makes it possible to produce the device having improved characteristics at low cost and high productivity. The substrate includes a transparent base member, with a transparent underlying layer and a transparent electrode layer successively stacked on one main surface of the transparent base member. The underlying layer includes transparent insulating fine particles and transparent binder, and the particles are dispersed to cover the one main surface with a coverage factor of particles ranging from 30% or more to less than 80%. An antireflection layer is provided on the other main surface of the transparent base. The antireflection layer includes transparent insulating fine particles and transparent binder, and the particles are dispersed to cover the other main surface with a coverage factor greater than the underlying layer. The transparent electrode layer contains zinc oxide deposited by low-pressure CVD method.

In order to improve photoelectric conversion properties of a silicon-based thin-film photoelectric converter to which a conductive SiOx layer is inserted to obtain an optical confinement effect, the silicon-based thin-film photoelectric converter according to the present invention includes an i-type photoelectric conversion layer of hydrogenated amorphous silicon or an alloy thereof, an i-type buffer layer made of hydrogenated amorphous silicon, and an n-type Si1-xOx layer (x is 0.25-0.6) stacked successively, wherein the buffer layer has a higher hydrogen concentration at its interface with and as compared with the photoelectric conversion layer and has a thickness of at least 5 nm and at most 50 nm. Accordingly, generation of silicon crystal phase parts and reduction of resistivity are promoted in the n-type Si1-xOx layer, contact resistance at the interface is reduced, and FF of the photoelectric converter is improved, so that the photoelectric converter achieves improved properties.

The invention relates to the field of the design of positive electrodes of silicon solar cells, in particular to a positive electrode of a silicon solar cell designed according to the topology principle. The positive electrode comprises fine grid lines and main grid lines, wherein a plurality of fine grid lines on the front side of a cell film are in concentric circles and concentric circular arcs; and the distance between the adjacent fine grid lines is 2-3mm. In the grid line conduction structure of the silicon solar cell, which is designed by the invention, the topology rule is applied, and thus the distribution condition of the grid line conduction structure is changed, the transmission speed of electrons on the surface of the cell film is improved and the effective conduction of the electrons is improved.

The invention discloses a front silver paste of a graphene solar HJT battery and a preparation method thereof. The raw materials of the front silver paste include the following components: by weight percentage, 5-20% nano-silver powder, 70-90% flake silver powder, 2-10% organic vehicle, 0.1-5% organic additive, 0.1~1% graphene. Beneficial effects: (1) Nano-silver powder of a specific size is mixed with flake-shaped silver powder, and graphene is added to improve the morphology of the silver network, increase densification, and reduce resistivity during low-temperature curing. (2) On the basis of not changing the thixotropy of the front silver paste, modify the nano-silver powder and graphene to increase the dispersion of the substance, thereby increasing the stability of the silver paste; at the same time, through surface modification, the printability of the silver paste is improved, Increase the quality of the heterojunction of the solar cell and improve the photoelectric conversion efficiency.

The invention discloses a perylene imide polymer, the structural formula of which is as follows: wherein R is an alkyl group; X is one of H and F atoms. The peryleneimide polymer provided by the present invention takes peryleneimide and carbon-carbon triple bond as repeating units, and is prepared by Stille coupling reaction; the carbon-carbon triple bond exists in the polymer as a conjugated microunit In the chain, the π system of the polymer molecule can be effectively increased, and the content of peryleneimide in the polymer chain can be at a higher position; this is conducive to improving the electron mobility on the one hand, and on the other hand can weaken the molecular The aggregation leads to the increase of the fill factor; the molecule has a wider absorption spectrum than the ordinary D-A type molecule, and the introduction of the F atom also leads to the narrowing of the band gap of the polymer and broadens the absorption range; the polymer is in It has wide and strong absorption in the visible light region, and has higher short-circuit current than unfluorinated polymers, and has better solubility and is easy to process in solution.

A dye-sensitized solar cell formed by layering a conductive layer; a photoelectric conversion layer in which a dye is adsorbed in a porous semiconductor layer and the layer is filled with a carrier transporting material; and a counter electrode including only a counter electrode conductive layer or including a catalyst layer and a counter electrode conductive layer on a support made of a light transmitting material, in which the photoelectric conversion layer is brought into contact with the counter electrode; the porous semiconductor layer forming the photoelectric conversion layer has two or more layers with different light scattering properties; and the two or more porous semiconductor layers are layered in an order of from a layer with lower light scattering property to a layer with higher light scattering property from a light receiving face side of the dye-sensitized solar cell.

A process for preparing a passivated emitter rear contact solar cell, which includes the steps as follows: removing the damaged layer on the surface of the silicon wafer and at the same time polishing both surfaces, texturing, forming PN junction, etching, removing the glass impurity, depositing a passivation film on the back surface, depositing a passivating antireflective layer on the front surface, making local openings on the back surface, screen printing of metal paste on both the front surface and the back surface and sintering, in which the texturing step employs a catalytic metal etching approach, and the textured structure is a nanometer-level textured structure. The present invention has combined removing the damaged layer on the surface of the silicon wafer and polishing both the front and back surfaces into one single step, and thus has simplified the production process and reduced the production cost.