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Glass powder and silver aluminum paste comprising glass powder and used on positive side of N-type double-sided solar cell

A technology for solar cells and glass powder, applied in the field of solar cells, can solve the problems of unsuitable use of low-temperature sintering paste, can not meet the requirements of low-temperature sintering, etc., and achieve the effects of increasing open voltage, small contact resistance, and reducing boron precipitation

Pending Publication Date: 2019-07-23
NANTONG T SUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) Reduce environmental pollution of conductive silver-aluminum paste: mainly focus on reducing the application of heavy metals such as Pb in the paste, such as the paste of Chinese patent CN201010294275.2, which uses environmentally friendly glass powder without harmful substances as a binder, which is environmentally friendly Type organic reagents are used as solvents and diluents, and the prepared silver-aluminum paste does not contain six substances prohibited by the EU RoHS directive (Pb, Cd, Hg, Cr(VI), polybrominated biphenyls PBB, polybrominated diphenyl ethers PBDE), and achieved true Environmental protection, but the paste is not suitable for the use of low-temperature sintering paste, and the glass frit that does not contain Pb is not suitable for the passivation layer SiN x sintering, can not meet the requirements of low temperature sintering

Method used

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  • Glass powder and silver aluminum paste comprising glass powder and used on positive side of N-type double-sided solar cell
  • Glass powder and silver aluminum paste comprising glass powder and used on positive side of N-type double-sided solar cell
  • Glass powder and silver aluminum paste comprising glass powder and used on positive side of N-type double-sided solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of glass powder, according to A1 formula in table 1, prepare glass powder, PbO, BiO, B 2 o 3 , SiO 2 、Al 2 o 3 and ZnO were weighed and prepared in proportion, and the compound of the main group I elements included 5% Na 2 Compound of O and 5% LiO, group II elements including 3% K 2 O, 3% CaO and 4% BaO, the compounds of the main group I elements and the compounds of the main group II elements are also weighed and prepared according to the proportion, and the above glass powder raw materials are placed in a crucible and mixed at room temperature Evenly, place the crucible carrying the glass powder raw material in a high-temperature furnace and heat it to 1100°C for 1 hour to melt into a uniform molten glass. The above-mentioned molten glass is quenched with deionized water to form irregular glass cullets. Put the above-mentioned glass cullets in a ball mill and pulverize them for 6 hours, and set the speed at 250r / min, sieve the above-mentioned ball-milled g...

Embodiment 2

[0030] A kind of glass powder, according to A2 formula in table 1, prepare glass powder, PbO, B 2 o 3 , SiO 2 、Al 2 o 3 and ZnO were weighed and prepared in proportion, and the oxides of the main group I elements included 5% LiCl and 5% Cs 2 O, compound of group II elements including 5% K 2 O and 5% CaO, the compound of the main group I element and the compound of the main group II element are also weighed and prepared according to the proportion, the above-mentioned glass powder raw material is placed in a crucible and mixed evenly at room temperature, and the loaded The crucible of glass powder raw material is placed in a high-temperature furnace and heated to 1100°C for 1 hour to melt into a uniform molten glass. The above-mentioned molten glass is quenched with deionized water to form irregular glass cullets. The above-mentioned glass cullets are Put it in a ball mill and grind it for 6 hours, set the speed at 250r / min, sieve the above-mentioned ball-milled glass powd...

Embodiment 3

[0033] A kind of glass powder, according to A3 formula in table 1, prepare glass powder, BiO, B 2 o 3 , SiO 2 、Al 2 o 3 and ZnO were weighed and prepared in proportion, in which the compound of the main group I elements included 5% K 2 O and 5% Cs 2 O, compounds of the main group II elements include 3% SrO, 3% MgCO 3 and 4% BaO, the compound of the I main group element and the compound of the II main group element are also weighed and prepared according to the proportion, the above glass powder raw material is placed in a crucible and mixed evenly at room temperature, and the glass Place the crucible of the powdered raw material in a high-temperature furnace and heat it to 1100°C for 1 hour to melt into a uniform molten glass. The above-mentioned molten glass is quenched with deionized water to form irregular glass cullets, and the above-mentioned glass cullets are placed in Pulverize in a ball mill for 6 hours, set the speed at 250r / min, sieve the ball-milled glass powd...

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Abstract

The invention discloses glass powder and silver aluminum paste which comprises the glass powder and used on the positive side of an N-type double-sided solar cell. The silver aluminum paste comprisesconductive silver powder, silicon aluminum alloy powder, the glass powder and an organic carrier, wherein the glass powder is prepared from the following components in percentage by weight: 0-50% of PbO, 0-50% of BiO, 5-15% B2O3, 8-9% of SiO2, 2-3% of Al2O3 and 5-15% of ZnO; the mass ratio of silicon to aluminum in the glass powder is (4-5) to 1; the content of the conductive silver powder is 80wt% to 90wt%; the conductive silver powder comprises nano silver powder and silver alloy powder in a mass ratio of 1 to (18-90). The glass powder not only guarantees the corrosiveness of SiNx, but alsodoes not cause relatively strong metallized composition. The silver aluminum paste prepared by using the glass powder solves the problem of the contradiction between contact resistance and open circuit voltage when the silver aluminum paste is printed on the positive side of an N-type crystalline silicon solar cell.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a glass powder and silver-aluminum paste for the front of an N-type double-sided solar cell comprising the glass powder. Background technique [0002] The goal that the field of solar cells has been pursuing is to improve conversion efficiency and reduce costs. At present, P-type crystalline silicon cells occupy an absolute share of the crystalline silicon cell market. Compared with conventional P-type single-crystalline silicon, N-type monocrystalline At the same time, the N-type single crystal module has the advantages of good weak light response and low temperature coefficient. Therefore, the N-type single crystal system has the dual advantages of high power generation and high reliability. With the introduction of new cell technologies and processes, the efficiency advantage of N-type monocrystalline cells will become more and more obvious, and the market share of N-ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00H01B1/22H01L31/0224
CPCC03C12/00H01L31/022425H01B1/22Y02E10/50C22C5/06C03C8/04C03C8/18C03C8/16C03C8/10C03C3/066C03C3/074B22F1/0545B22F1/052B22F1/09B22F1/103C22C1/0416C22C1/0466B22F1/10B22F2301/255B22F2302/45C03C3/072H01L31/0488
Inventor 朱鹏施赛杰郑金华
Owner NANTONG T SUN NEW ENERGY CO LTD
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