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Solar cell production process using net-knot-free printing

A technology of solar cell and preparation process, applied in screen printing machine, printing, printing machine and other directions, can solve the problems of printing disconnection, affecting printing paste, etc., and achieve finer and denser metal wires, reduce consumption, and reduce production. cost effect

Active Publication Date: 2017-05-17
TONGWEI SOLAR ENERGY CHENGDU CO LID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a solar cell preparation process without mesh printing to solve the problems in the prior art that the mesh formed by the warp and weft threads on the mesh cloth seriously affects the printing paste and causes printing disconnection and other bad problems

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] A solar cell preparation process without net-knot printing, using monocrystalline silicon wafers as raw materials, sequentially through alkali corrosion, acid cleaning to remove impurities, pure water re-cleaning, drying water, phosphorus oxychloride diffusion, phosphorus glass removal After insulation, thermal annealing, front silicon nitride coating, back electrode printing, back electrode drying, back electric field printing, and back electric field drying, positive electrode printing is performed. The composition of silver paste used in positive electrode printing is: silver powder 71% , graphene powder 12%, glass powder 2%, organic carrier 15%, described organic carrier is made of 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, plasticizer, and surfactant is Silicone resin and tributyl citrate, thixotropic agent is ethyl cellulose, plasticizer is tributyl citrate, 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, The ratio between the four...

Embodiment 2

[0027] A solar cell preparation process without net-knot printing, using monocrystalline silicon wafers as raw materials, sequentially through alkali corrosion, acid cleaning to remove impurities, pure water re-cleaning, drying water, phosphorus oxychloride diffusion, phosphorus glass removal After insulation, thermal annealing, front silicon nitride coating, back electrode printing, back electrode drying, back electric field printing, and back electric field drying, positive electrode printing is performed. The composition of silver paste used in positive electrode printing is: silver powder 75% , Graphene powder 10%, glass powder 3%, organic carrier 12%, described organic carrier is made of 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, plasticizer, and surfactant is Tributyl citrate and oleic acid, thixotropic agent is castor oil, plasticizer is tributyl citrate, 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, plasticizer The ratio between the f...

Embodiment 3

[0034] A solar cell preparation process without net-knot printing, using monocrystalline silicon wafers as raw materials, sequentially through alkali corrosion, acid cleaning to remove impurities, pure water re-cleaning, drying water, phosphorus oxychloride diffusion, phosphorus glass removal After insulation, thermal annealing, front silicon nitride coating, back electrode printing, back electrode drying, back electric field printing, and back electric field drying, positive electrode printing is performed. The composition of silver paste used in positive electrode printing is: silver powder 71% , graphene powder 12%, glass powder 2%, organic carrier 15%, described organic carrier is made of 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, plasticizer, and surfactant is Oleic acid, thixotropic agent is ethyl cellulose, plasticizer is tributyl citrate, 4,4'-dichlorodiphenyl sulfone, surfactant, thixotropic agent, and plasticizer. It is: 8:0.2:0.2:1.6, and the spec...

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PUM

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Abstract

The invention discloses a solar cell production process using net-knot-free printing and relates to the technical field of solar cell production. An anode is printed by a net-knot-free printing manner. The solar cell production process specifically includes the steps of firstly, preparing silver paste, to be more specific, stirring, by weight percentage, 70-75% of silver powder, 10-15% of graphene powder, 2-4% of glass powder and 12-15% of organic carrier in a stirring device at 85 DEG C for 10-12 hours; secondly, producing a screen, to be more specific, using a planar network structure integrally formed by 3D printing, and reserving printing down alignment space at positions needing line printing to obtain the printing screen; thirdly, printing, to be more specific, placing the printing screen obtained in the second step on a moving mechanism which parallelly moves relative to a printing bearing table, allowing a plane where the screen is located to be parallel with a plane where the printing bearing table is located, and printing with the silver paste obtained in the first step. The solar cell production process has the advantages that the production process is good in printing effect, and the problems that the printing paste is severely affected by net knots formed warps and wefts on screen cloth, and defects such as printing line breaking are caused in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of solar cell preparation, and more specifically relates to a solar cell preparation process without mesh printing. Background technique [0002] Solar cell, also known as "solar chip" or "photovoltaic cell", is a kind of photoelectric semiconductor sheet that uses sunlight to directly generate electricity. Generate current, which is called solar photovoltaic (Photovoltaic, abbreviated as PV) in physics, referred to as photovoltaic, its working principle is to use the photovoltaic effect to convert light energy into electrical energy, when the sun shines on the semiconductor P-N junction , forming a new hole-electron pair (V-E pair), under the action of the P-N junction electric field, holes flow from the N region to the P region, electrons flow from the P region to the N region, and a current is formed after the circuit is turned on. Because it is a solid semiconductor device that converts sunlight energy ...

Claims

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Application Information

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IPC IPC(8): H01B1/16H01B1/18H01B1/22H01B1/24H01L31/0224B41F15/36B41M1/12
CPCB41F15/36B41M1/12H01B1/16H01B1/18H01B1/22H01B1/24H01L31/022425Y02E10/50
Inventor 张冠纶曹韵国常青孙纤
Owner TONGWEI SOLAR ENERGY CHENGDU CO LID
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