Preparation method of nano low-silver high-efficiency positive silver conductor paste for crystalline silicon solar energy

A technology of silver conductor paste and solar energy, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, semiconductor devices, electrical components, etc., and can solve the problem of affecting photoelectric conversion performance, high consumption of precious metal silver, and rough paste fineness, etc. Problems, to achieve the effect of improving photoelectric conversion efficiency, improving application performance, and enhancing adhesion

Inactive Publication Date: 2021-02-26
陕西彩虹新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the silver powder used by the positive silver has two disadvantages. One is that silver micropowder is mostly used, that is, the silver powder is mostly micron silver powder, and the fineness of the paste made is relatively rough, resulting in a thicker film layer during the printing process. Poor compactness produces holes, poor printing performance, and small line height-width

Method used

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  • Preparation method of nano low-silver high-efficiency positive silver conductor paste for crystalline silicon solar energy

Examples

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Effect test

Embodiment 1

[0028] A nanometer low-silver crystalline silicon-containing front-side silver conductor paste for solar energy and a preparation method thereof, the specific preparation of which is completed according to the following process steps:

[0029] First, slowly drop 500ml of saturated silver nitrate solution and PVP mixed solution into the sodium borohydride solution, and at the same time, stir in a 50°C water bath. Press and dry to obtain silver powder with a particle size of 5nm-10nm. Weigh 35g of the silver powder, then add 45g of polyester resin into 55g of n-butanol, and heat it at a constant temperature at 85°C until it is completely dissolved. Obtain organic carrier through filtration; Finally the nanometer silver powder of 35g is joined in the organic carrier of 55g, add 1g dispersion agent, add 2g nano zinc oxide, add the antifoaming agent of 1g, the thickening agent of 2g and the tensio-active agent of 2g, Add 2g of lead-free environmentally friendly self-made glass powd...

Embodiment 2

[0031] A nanometer low-silver crystalline silicon-containing front-side silver conductor paste for solar energy and a preparation method thereof, the specific preparation of which is completed according to the following process steps:

[0032] First, slowly add 500ml of saturated silver nitrate solution and PVP mixed solution into the sodium borohydride solution dropwise, and at the same time, stir in a water bath at 55°C. Press and dry to obtain silver powder with a particle size of 12nm-15nm. Weigh 40g of the silver powder, then add 50g of polyurethane resin to 50g of isoprene glycol, and heat it at a constant temperature at 88°C until it is completely dissolved. Obtain organic carrier through filtration; Finally the nano-silver powder of 40g is joined in the organic carrier of 47g, add 2g dispersant, add 3g nano-zinc oxide, add the defoamer of 1g and the thickening agent of 2g and the tensio-active agent of 2g, Add 3g of lead-free environmentally friendly self-made glass po...

Embodiment 3

[0034] A nanometer low silver-containing crystalline silicon solar energy back silver conductor paste and a preparation method thereof, the specific preparation of which is completed according to the following process steps:

[0035] First, slowly add 500ml of saturated silver nitrate solution and PVP mixed solution to the sodium borohydride solution dropwise, and at the same time, stir in a 60°C water bath. Press and dry to obtain silver powder with a particle size of 10nm-15nm. Weigh 45g of the silver powder, then add 60g of epoxy resin to 40g of diethylene glycol butyl ether acetate, and keep the temperature at 90°C Heat until completely dissolved, and filter to obtain an organic carrier; finally, add 45g of nano-silver powder to 37g of organic carrier, add 2g of dispersant, add 4g of nano-titanium dioxide, add 2g of defoamer, 3g of thickener and 3g of Surfactant, add 4g of lead-free environmental protection self-made glass powder, mix in a planetary or other mixer for 150 ...

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Abstract

The invention discloses a preparation method of nano low-silver high-efficiency positive silver conductor paste for crystalline silicon solar energy, and the method comprises the following steps: S1)preparing nano silver powder: dropwise adding a saturated silver nitrate and PVP mixed solution into a sodium borohydride solution, performing stirring in a water bath at 30-55 DEG C, performing centrifuging, performing washing with alcohol, and performing drying at a low temperature of 25-30 DEG C and a negative pressure to obtain the nano silver powder; adding a catalyst at 180 +/-5 DEG C for thermal decomposition to obtain silver powder with the particle size of 5-70nm; S2) preparing an organic carrier; S3) preparing nano-silver conductor paste. According to the method, self-made nano silver powder is used for replacing micron-sized silver powder in existing positive silver conductor paste, the microstructure of the silver conductor paste is changed due to reduction of the particle sizeof silver, and therefore the conductivity, the printing performance and the crystalline silicon substrate adhesion performance of the paste are changed, and printed conductor lines have the excellentheight-width ratio; the lines tend to be semitransparent, so that the light transmittance is improved, the photoelectric conversion efficiency is improved, and the application of the positive silverconductor paste in crystalliane silicon solar energy is greatly expanded.

Description

Technical field: [0001] The invention belongs to the field of electronic paste, and relates to a nanometer low-silver high-efficiency conductor paste and a preparation method thereof, in particular to a nanometer low-silver high-efficiency conductor paste suitable for the field of crystalline silicon solar photovoltaic manufacturing and a preparation method thereof. Background technique: [0002] At present, with the acceleration of the world's energy consumption, non-renewable energy has gradually decreased. Human beings are already developing wind energy, water energy, nuclear energy and solar energy. Among them, the development and utilization of solar energy is the most environmentally friendly, effective and resource-rich. Among them, the current major crystalline silicon solar photovoltaic projects are progressing most rapidly. Among them, the main components of the applied front silver paste include functional phase silver powder, inorganic binder (such as glass powde...

Claims

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Application Information

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IPC IPC(8): H01B1/16H01B1/22H01L31/0224
CPCH01B1/22H01B1/16H01L31/022466H01L31/022483
Inventor 杨欣樊钊锋王玉琪赵永志
Owner 陕西彩虹新材料有限公司
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