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Front silver paste adapted to low temperature sintering of solar cell and preparation method of front silver paste

A solar cell and low-temperature sintering technology, which is applied in the field of solar cells, can solve problems such as limited effect and lower sintering temperature of paste, and achieve the effects of preventing diffusion, lowering sintering temperature, and good conductivity

Inactive Publication Date: 2017-06-23
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a limited effect on reducing the sintering temperature of the slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A front silver paste for solar cells suitable for low temperature sintering, including the following raw materials in mass percentage: 85% of spherical silver powder with particle size ≤ 5 microns, solvent: 3% butyl carbitol, 5% butyl carbitol acetate , Binder: ethyl cellulose 2%, cellulose acetate butyrate 3%, glass powder 1%, sintering aid: rhodium 1%.

[0024] A method for preparing a solar cell front silver paste suitable for low-temperature sintering, comprising the steps of:

[0025] (1) Nano-silver powder is prepared by DC arc plasma evaporation and coagulation method, the average particle size of the obtained silver powder is less than 100 nanometers, and every 3-10 silver powder particles form spherical aggregates;

[0026] (2) Put glass powder into the silver powder prepared in step (1), stir and mix at 1500r / min for 30min; then calcinate at 800°C for 60min to obtain clinker, put Immerse in a volume of solvent for 20 minutes, take out the clinker, calcinate i...

Embodiment 2

[0029] A solar cell front silver paste suitable for low temperature sintering, comprising the following raw materials in mass percentage: 83% of spherical silver powder with a particle size of ≤5 microns, solvent: 3% terpineol, 4% terpineol, binder: B Base cellulose 3%, hydroxymethyl cellulose 3%, glass powder 2%, sintering aid: ruthenium-containing compound 2%.

[0030] A method for preparing a solar cell front silver paste suitable for low-temperature sintering, comprising the steps of:

[0031] (1) Nano-silver powder is prepared by DC arc plasma evaporation and coagulation method, the average particle size of the obtained silver powder is less than 100 nanometers, and every 3-10 silver powder particles form spherical aggregates;

[0032] (2) Put glass powder into the silver powder prepared in step (1), stir and mix at 1800r / min for 15min; then calcinate at 700°C for 90min to obtain clinker, put Immerse in a volume of solvent for 10 minutes, take out the clinker, calcinate ...

Embodiment 3

[0035] A solar cell front silver paste suitable for low-temperature sintering, including the following raw materials in mass percentage: 80% of spherical silver powder with a particle size of ≤5 microns, solvent: 15% of butyl carbitol and butyl carbitol acetate, and viscose Caking agent: nitrocellulose, cellulose acetate butyrate 3%, glass powder 1%, sintering aid: iridium-containing compound 1%.

[0036] A method for preparing a solar cell front silver paste suitable for low-temperature sintering, comprising the steps of:

[0037] (1) Nano-silver powder is prepared by DC arc plasma evaporation and coagulation method, the average particle size of the obtained silver powder is less than 100 nanometers, and every 3-10 silver powder particles form spherical aggregates;

[0038] (2) Put glass powder into the silver powder prepared in step (1), stir and mix at 2000r / min for 15min; then calcinate at 700°C for 60min to obtain clinker, put Immerse in a volume of solvent for 10 minute...

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Abstract

The invention relates to a front silver paste adapted to low temperature sintering of a solar cell and a preparation method of the front silver paste, and belongs to the technical field of solar cells. The front silver paste comprises raw materials including 80-90% of spherical silver powder, 5-15% of a solvent, 3-10% of a binding agent, 1-3% of glass powder and 0-2% of a sintering aid by mass. The provided front silver paste of the solar cell is high in performance and is adapted to lower temperature sintering.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell front silver paste suitable for low-temperature sintering and a preparation method thereof. Background technique [0002] A solar cell is a semiconductor device that converts solar energy into electricity. Structurally, it includes a back electrode, a pn junction, an anti-reflection film and a front electrode. Among them, the front electrode is used to accept photo-excited electrons and output current to the outside. The quality of the front-side silver paste used to make the front electrode of the solar cell directly affects the series resistance of the solar cell and the light conversion efficiency of the cell, which constitutes a key technical point in the production of the solar cell. [0003] At present, the peak sintering temperature of the front silver paste for solar cells is 750-830°C, and the high sintering temperature indirectly requires that the bac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224
CPCH01B1/22H01B1/16H01B13/00H01L31/022425
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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