MWT cell, MWT cell hole filling slurry, frit and frit raw material composition

A technology of glass frit and composition, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor adhesion of conductive paste, and achieve the effects of no influence of steady-state leakage, small damage, and avoid falling off

Inactive Publication Date: 2021-02-19
DK ELECTRONICS MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present application is to provide a MWT battery, MWT battery filling paste, glass frit an

Method used

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  • MWT cell, MWT cell hole filling slurry, frit and frit raw material composition
  • MWT cell, MWT cell hole filling slurry, frit and frit raw material composition
  • MWT cell, MWT cell hole filling slurry, frit and frit raw material composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] This embodiment provides a glass frit of a MWT battery filling paste, a MWT battery filling paste, and a MWT battery.

[0075] The glass frit of MWT battery filling paste is mainly prepared through the following steps:

[0076] Raw materials are configured according to the following mass percentages: P 2 o 5 73.35%, CuO 4%, MgO 5.86%, CaO 7.99%, SiO 2 6.3% and K 2 O 2.5%.

[0077] Fully mix the weighed raw materials, put the mixed mixture into a platinum crucible, then put it into an electric furnace with a furnace temperature of 1300°C, and keep it warm for 1 hour; pour the melted glass liquid into a tablet press and press it into thin slices Then put the flake glass into a ball mill for ball milling; sieve the milled glass powder to obtain glass frit.

[0078] MWT battery hole filling slurry is mainly prepared through the following steps:

[0079] Raw materials are configured according to the following mass percentages: 8.8% organic vehicle, 88.5% silver powde...

Embodiment 2

[0087] Embodiment 2 also provides a MWT battery hole filling slurry and a MWT battery.

[0088] The difference between Example 2 and Example 1 lies in that the raw materials of the MWT battery hole filling slurry are different.

[0089] In Example 2, the raw materials of the MWT battery hole filling slurry mainly include the following components in terms of mass percentage:

[0090] The organic vehicle of 8.8%, the silver powder of 87.5%, the zinc powder of 1.5% and the glass frit of the embodiment 1 of 2.2% provide the MWT battery filling paste; Wherein, organic vehicle is the ethyl cellulose of 20wt%, 20wt% acrylic acid Resin, 40 wt% butyl carbitol, 20 wt% butyl carbitol acetate.

[0091] The MWT battery of this example is prepared by the same method as that of Example 1.

Embodiment 3

[0093] Embodiment 3 also provides a glass frit of a MWT battery hole filling paste, a MWT battery hole filling paste, and a MWT battery.

[0094] Please refer to Example 1, the difference between Example 3 and Example 1 is that the raw materials of the glass frit of the MWT battery filling paste are different;

[0095] In this embodiment, the raw materials of the glass frit of the MWT battery hole filling paste are configured according to the following mass percentages:

[0096] P 2 o 5 60%, CuO8%, MgO8%, CaO10%, SiO 2 8% and K 2 O 6%.

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Abstract

The invention relates to the field of metal perforated winding silicon solar cells, in particular to an MWT cell, MWT cell hole filling slurry, frit and frit raw material composition. The compositionfor preparing MWT cell hole filling slurry frit mainly comprises the following components in parts by weight: 60-80 parts of P2O5, 1-8 parts of CuO, 2-8 parts of MgO, 4-10 parts of CaO, 3-8 parts of SiO2 and 1-6 parts of K2O. The corrosion capability of the phosphate glass is weak, so that an over-etching phenomenon can be avoided, a PN junction is prevented from being damaged to cause electric leakage, and no influence is caused to steady-state electric leakage. CuO can effectively improve the wettability of the glass, so that a good tin soldering effect is achieved. When the frit prepared through mutual compatibility of all the substances is used for the MWT battery hole-pouring slurry, the adhesive force of the hole-pouring slurry can be improved, and the cured slurry is prevented fromfalling off.

Description

technical field [0001] The present application relates to the field of metal perforated silicon solar cells, in particular, to a MWT battery, a MWT battery filling paste, a glass frit, and a glass frit raw material composition. Background technique [0002] MWT cell is the abbreviation of metallization wrap-through (MWT) silicon solar cell. The MWT battery eliminates the main grid line of the front electrode through the technology of laser drilling and rear wiring. The back of the chip effectively reduces the shading of the front grid lines, improves the conversion efficiency, and reduces the consumption of silver paste and the loss of minority carrier recombination at the metal electrode-emitter interface. [0003] However, the hole-filling slurry in the prior art has the problem of poor adhesion after filling the holes, which leads to the problem of easy falling off. Contents of the invention [0004] The purpose of the embodiments of the present application is to prov...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/02245H01L31/18Y02E10/50
Inventor 裘慧广史卫利
Owner DK ELECTRONICS MATERIALS INC
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