High-performance crystalline silicon solar back field aluminum paste and preparation method thereof, and crystalline silicon solar cell prepared from high-performance crystalline silicon solar back field aluminum paste

A technology of back field aluminum paste and solar energy, applied in the field of solar cells, to achieve the effect of reducing warpage, good adhesion, and good adhesion

Inactive Publication Date: 2018-11-23
YANGZHOU XINJING PHOTOVOLTAIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a high-performance crystalline silicon solar back-field aluminum paste and its preparation method, and a crystalline silicon solar cell prepared therefrom, to solve the problems of strong adhesion, water boiling resistance, and no warping. The excellent physical properties and high photoelectric conversion rate of the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of high-performance crystalline silicon solar back field aluminum paste I

[0026] Step 1. Preparation of modified carbon nanotubes: Place the carbon nanotubes in a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, and the mass-volume ratio of the carbon nanotubes to the mixed acid solution is 1g:100ml , Ultrasonic treatment at 40 ℃ for 1h, then diluted with distilled water and centrifuged, the resulting precipitate was washed again with distilled water to neutral, the purified carbon nanotubes in the mass concentration of 10g / L SnCl 2 After sensitizing treatment in the solution for 30 minutes, rinse the sensitive carbon nanotubes with distilled water to neutrality, mix the sensitized carbon nanotubes with KOH at a mass ratio of 1:1, and activate them under N2 protection. The activated carbon nanotubes are washed with distilled water to neutrality and then dried, and finally the activated carbon ...

Embodiment 2

[0031] Example 2 Preparation of high-performance crystalline silicon solar back field aluminum paste II

[0032] Step 1. Preparation of modified carbon nanotubes: the carbon nanotubes are placed in a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, and the mass-volume ratio of the carbon nanotubes to the mixed acid solution is 3g:100ml , Ultrasonic treatment at 40 ℃ for 1h, then diluted with distilled water and centrifuged, the resulting precipitate was washed again with distilled water to neutral, the purified carbon nanotubes in the mass concentration of 10g / L SnCl 2 After sensitizing treatment in the solution for 30 minutes, rinse the sensitive carbon nanotubes with distilled water to neutrality, mix the sensitized carbon nanotubes with KOH at a mass ratio of 1:4, and activate them under N2 protection. The activated carbon nanotubes are washed with distilled water to neutrality and then dried, and finally the activated c...

Embodiment 3

[0037] Example 3 Preparation of high-performance crystalline silicon solar back field aluminum paste III

[0038] Step 1. Preparation of modified carbon nanotubes: Place the carbon nanotubes in a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, and the mass volume ratio of the carbon nanotubes to the mixed acid solution is 1.5g: 100ml, sonicated at 40℃ for 1h, then diluted with distilled water and centrifuged, the resulting precipitate was washed again with distilled water to neutrality, and the purified carbon nanotubes were in SnCl with a mass concentration of 10g / L 2 After sensitizing treatment in the solution for 30 minutes, rinse the sensitive carbon nanotubes with distilled water to neutrality, thoroughly mix the sensitized carbon nanotubes with KOH in a mass ratio of 1:2.5, and activate them under the protection of N2. The activated carbon nanotubes are washed with distilled water to neutrality and then dried, and fi...

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Abstract

The invention discloses high-performance crystalline silicon solar back field aluminum paste and a preparation method thereof, and a crystalline silicon solar cell prepared from the high-performance crystalline silicon solar back field aluminum paste. The high-performance crystalline silicon solar back field aluminum paste is prepared from compound aluminum powder, a modified carbon nanotube, glass frit and an organic binder, wherein the compound aluminum powder is prepared by mixing spherical aluminum powder with the mean grain sizes of 2 microns, 5 microns and 8 microns and magnesium powderwith the mean grain size of 4 microns at the mass ratio of 1:(1-5):(7.2-8.0):(1-2.5). Compared with the prior art, the high-performance crystalline silicon solar back field aluminum paste has the advantages that the aluminum powder with different mean grain sizes is compounded with the metal magnesium powder and contact between the aluminum paste and a textured silicon wafer is improved, so that reaction infiltration between aluminum liquid and the carbon nanotube is strengthened, a continuous compact coating is obtained from the carbon tube surface of the modified carbon nanotube, the wettability and the interface bonding force between the carbon nanotube and the aluminum liquid are improved and the high-performance crystalline silicon solar back field aluminum paste has high photoelectric conversion efficiency, good adhesive force, boiling resistance and low warp rate and has a broad application prospect.

Description

Technical field [0001] The invention relates to the technical field of solar cells, in particular to a high-performance crystalline silicon solar back field aluminum slurry and a preparation method thereof, and a crystalline silicon solar cell prepared therefrom. Background technique [0002] As a kind of green energy, solar cells have attracted more and more attention because of their inexhaustible, non-polluting, and not restricted by geographical resources. Therefore, in recent years, crystalline silicon solar cells have become the main solar photovoltaic power generation unit. Rapid development. Among them, the electronic aluminum paste for silicon solar cells is the main product in solar electronic pastes, and is usually called solar cell anode paste. It is used to form the back surface field of solar cells and also serves as the back field of solar cells. use. [0003] With the development trend of photovoltaic silicon cell industry towards large area, thinning, high efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/18H01B1/22H01B1/24H01B13/00H01L31/0224
CPCH01B1/16H01B1/18H01B1/22H01B1/24H01B13/00H01L31/022425Y02E10/50
Inventor 李超黄辉陈宝山夏平春徐芳唐军冯帅臣
Owner YANGZHOU XINJING PHOTOVOLTAIC TECH
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