Mixed electrode slurry for crystalline silicon solar cells

A technology of solar cells and mixed pastes, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve the problems of reducing battery conversion efficiency, reducing the melting temperature of aluminum powder, and increasing costs. Good economic benefits, improve electrical conductivity, and improve the effect of electrical conductivity

Inactive Publication Date: 2016-06-08
GUANGXI JIKUAN SOLAR ENERGY EQUIP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The use of this slurry can increase the thickness of the alloy layer and improve the ohmic contact. However, in this slurry, the silicon alloy powder and the functional conductive powder (i.e. aluminum powder) are only simply mechanically mixed, and the sintering will not

Method used

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  • Mixed electrode slurry for crystalline silicon solar cells

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Experimental program
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Example Embodiment

[0026] Example 1

[0027] First prepare lithium iron phosphate / carbon nanotube composites:

[0028] (1) First ultrasonically disperse 8g carbon nanotubes in a mixed solvent with a volume ratio of 450g ethanol and water of 1:1 to form a carbon nanotube dispersion;

[0029] (2) Add 20g lithium carbonate, 10g ferric nitrate, 8g lithium dihydrogen phosphate and 15g sucrose to the carbon nanotube dispersion respectively, heat and stir to form a slurry, cool to room temperature, ultrasonically disperse for 15min, and place in a vacuum drying box for 15h , then vacuumed and heated to 60°C until the solvent in the slurry was completely volatilized;

[0030] (3) Pre-sintering the composite material treated in step (2) in a muffle furnace at 350° C. for 6 hours, and then calcining at 750° C. for 6 hours to obtain the lithium iron phosphate / carbon nanotube composite material.

[0031] Then formulate glass powder and organic carrier, wherein the component of glass powder I is 5~15μmSiO ...

Example Embodiment

[0033] Example 2

[0034] First prepare lithium iron phosphate / carbon nanotube composites:

[0035] (1) First ultrasonically disperse 5g of carbon nanotubes in a mixed solvent with a volume ratio of 400g of ethanol and water of 1:1 to form a carbon nanotube dispersion;

[0036] (2) Add 25g lithium carbonate, 5g ferric nitrate, 5g lithium dihydrogen phosphate and 10g sucrose to the carbon nanotube dispersion respectively, heat and stir to form a slurry, cool to room temperature, ultrasonically disperse for 10min, and place in a vacuum drying box for 20h , then vacuum and heat to 50°C until the solvent in the slurry evaporates completely;

[0037] (3) Pre-sintering the composite material treated in step (2) in a muffle furnace at 300° C. for 7 hours, and then calcining at 700° C. for 5 hours to obtain the lithium iron phosphate / carbon nanotube composite material.

[0038] Then formulate glass powder and organic carrier, wherein the component of glass powder I is 5~15μmSiO 2 1...

Example Embodiment

[0040] Example 3

[0041] First prepare lithium iron phosphate / carbon nanotube composites:

[0042] (1) First, ultrasonically disperse 10 g of carbon nanotubes in a mixed solvent with a volume ratio of 500 g of ethanol and water of 1:1 to form a carbon nanotube dispersion;

[0043] (2) Add 20g lithium carbonate, 10g ferric nitrate, 10g lithium dihydrogen phosphate and 15g sucrose to the carbon nanotube dispersion respectively, heat and stir to form a slurry, cool to room temperature and ultrasonically disperse for 10min, then transfer to a vacuum drying box for 20h , then vacuum and heat to 50°C until the solvent in the slurry evaporates completely;

[0044] (3) Pre-sintering the composite material treated in step (2) in a muffle furnace at 300° C. for 7 hours, and then calcining at 700° C. for 5 hours to obtain the lithium iron phosphate / carbon nanotube composite material.

[0045] Then formulate glass powder and organic carrier, wherein the component of glass powder I is 5...

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Abstract

The invention belongs to a photocell electrode material and discloses a mixed electrode slurry for crystalline silicon solar cells. The mixed electrode slurry is prepared from, by weight, 40-60 parts of silver powder, 5-10 parts of zinc powder, 10-20 parts of silver coated nickel alloy powder, 1-5 parts of a lithium iron phosphate and carbon nanotube composite material, 1-8 parts of glass powder, 0.5-2 parts of a silane coupling agent, 10-15 parts of butyl carbitol acetate, 1-3 parts of zinc naphthenate, 0.1-0.5 part of hydroxymethyl cellulose and 0.25-1 part of hydrogenated castor oil. The invention further discloses a preparation method of the mixed electrode slurry. The mixed electrode slurry prepared by means of the preparation method does not contain lead, completely meets the requirements of environmental protection, is applied to the production of the solar cells and can form a strong attachment force on the surfaces of the solar cells, and the photoelectric conversion efficiency of the cells is high. In addition, the mixed electrode slurry is simple in process and low in cost and thus has a wide application prospect.

Description

technical field [0001] The invention relates to a photovoltaic cell electrode material, in particular to an electrode mixed slurry for a crystalline silicon solar cell. Background technique [0002] Solar cells can directly convert light energy into electrical energy, which is a way to effectively utilize solar energy and is also an important renewable and clean energy source. In the past ten years, in the rapidly developing photovoltaic industry, high efficiency and low cost have been the two main points of competition. As the most important solar cell material, crystalline silicon has occupied most of the photovoltaic market due to its high efficiency and stability. share. [0003] Crystalline silicon solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. When sunlight irradiates on the crystalline silicon semiconductor p-n junction, new hole-electron pairs are formed. Under the action o...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01L31/0224
CPCH01B1/22H01L31/022425Y02E10/50
Inventor 马昭键李正良谢刚邱秋燕陆俊行周帆陆翔黄灿胜周奖
Owner GUANGXI JIKUAN SOLAR ENERGY EQUIP
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