Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparing method for back side silver paste of crystalline silicon solar cells

A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve problems such as imperfect silver powder and back silver paste, high consumption, high pollution, etc., and achieve high photoelectric conversion efficiency, small surface pores, and few surface pores Effect

Inactive Publication Date: 2016-11-23
赵兰
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research and production of domestic silver powder and back silver paste are not perfect at present, unable to meet the huge needs of the market
At the same time, the high consumption and high pollution of traditional technology will also restrict the development of my country's solar cell industry.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing silver paste on the back side of a crystalline silicon solar cell, comprising the following steps:

[0018] Step 1, in parts by weight, take 5 parts of silver nitrate, 2 parts of sodium citrate, 1 part of xylene formaldehyde resin, 0.5 part of soybean lecithin, and 0.1 part of polyamide wax and add them to 10 parts of deionized water, and adjust the pH to 6.5, add 4 parts of glucose under stirring condition, react, filter and dry to obtain modified silver powder;

[0019] Step 2, in parts by weight, take 3 parts of magnesium sulfate, 2 parts of ammonium phosphate, 1 part of lithium hydroxide, 3 parts of metatitanic acid, 2 parts of potassium titanate whiskers, 1 part of titanate coupling agent, surface active 4 parts, smelting at 1200°C for 60 minutes, quenching the molten material in water, and crushing the block produced by quenching to obtain powder I;

[0020] Step 3, in parts by weight, mix powder I with 100 parts of carbon powder, sinter at...

Embodiment 2

[0025] A method for preparing silver paste on the back side of a crystalline silicon solar cell, comprising the following steps:

[0026] Step 1, in parts by weight, take 8 parts of silver nitrate, 3 parts of sodium citrate, 2 parts of xylene formaldehyde resin, 0.9 part of soybean lecithin, and 0.3 part of polyamide wax and add them to 14 parts of deionized water, adjust the pH to 7.0, add 5 parts of glucose under stirring conditions, react, filter and dry to obtain modified silver powder;

[0027] Step 2, in parts by weight, take 6 parts of magnesium sulfate, 4 parts of ammonium phosphate, 3 parts of lithium hydroxide, 5 parts of metatitanic acid, 5 parts of potassium titanate whiskers, 2 parts of titanate coupling agent, surface active 5 parts of the agent, smelted at 1200°C for 45 minutes, quenched the molten material in water, and crushed the block produced by quenching to obtain powder I;

[0028] Step 3, in parts by weight, mix powder I with 130 parts of carbon powder,...

Embodiment 3

[0033] A method for preparing silver paste on the back side of a crystalline silicon solar cell, comprising the following steps:

[0034] Step 1, in parts by weight, take 8 parts of silver nitrate, 3 parts of sodium citrate, 2 parts of xylene formaldehyde resin, 0.6 part of soybean lecithin, and 0.2 part of polyamide wax and add them to 13 parts of deionized water, adjust the pH to 7.5, add 5 parts of glucose under stirring condition, react, filter and dry to obtain modified silver powder;

[0035] Step 2, in parts by weight, take 6 parts of magnesium sulfate, 3 parts of ammonium phosphate, 2 parts of lithium hydroxide, 5 parts of metatitanic acid, 6 parts of potassium titanate whiskers, 3 parts of titanate coupling agent, surface active 5 parts of the agent, smelting at 1250°C for 50 minutes, quenching the molten material in water, and crushing the block produced by quenching to obtain powder I;

[0036] Step 3, in parts by weight, mix powder I with 120 parts of carbon powde...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a preparing method for back side silver paste of crystalline silicon solar cells. The preparing method comprises the steps that silver nitrate, sodium citrate, xylene formaldehyde resin, soybean lecithin and polyamide wax are added into deionized water, the pH is regulated, glucose is added, a reaction, filtering and drying are carried out, and modified silver powder is obtained; magnesium sulfate, ammonium phosphate, lithium hydroxide, metatitanic acid, potassium titanate whiskers, a titanate coupling agent and a surfactant are taken and smelted, molten materials are put into water for quenching, lumps generated in quenching are smashed, powder I is obtained and then mixed with carbon powder, sintering and cooling are carried out, grinding is carried out, and powder II is obtained; finally, the modified silver powder, obtained powder III, an organic solvent, a dispersing agent and chitosan are mixed and ground, and the silver paste is obtained. The silver paste is uniform, compact, high in adhesion and average photoelectric conversion efficiency and capable of being widely applied to preparation of high-performance solar cells, and few pores are formed in the surface and are small.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a method for preparing silver paste on the back of a crystalline silicon solar cell. Background technique [0002] With the depletion of petrochemical energy, the environmental pollution is aggravating. People have begun to invest more energy in the field of new energy in order to provide energy supply for the future. Solar energy is the preferred choice for future energy due to its huge stock and green and non-polluting. All countries in the world regard the research, development and utilization of solar energy as the top priority of the energy revolution, and the photovoltaic industry has become another new explosive development industry. Solar cells have been widely used in military, aerospace technology, industry, commerce, agriculture, communications, household appliances and other fields, opening up broad prospects for human beings to use solar energy on a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 不公告发明人
Owner 赵兰