Low-temperature conductive silver paste for HIT solar cell and preparation method thereof

A technology for solar cells and conductive silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. Poor resin toughness and other problems, to achieve the effect of improving photoelectric conversion efficiency, high filling factor, and improving anti-aging

Active Publication Date: 2019-08-16
NANTONG T SUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention uses nano-silver wires with a long length, which is not conducive to printing, and the selected resin has poor toughness. Therefore, during curing, the resin shrinks and the paste cannot be in close contact with the substrate.

Method used

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  • Low-temperature conductive silver paste for HIT solar cell and preparation method thereof
  • Low-temperature conductive silver paste for HIT solar cell and preparation method thereof
  • Low-temperature conductive silver paste for HIT solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A low-temperature conductive silver paste for HIT solar cells, said low-temperature conductive silver paste is prepared from the following components according to mass percentage:

[0035]

[0036] Soak 2% novolac epoxy resin into 1% diethylene glycol butyl ether acetate according to the above formula, heat to 65° C., and keep it warm for 2 hours to obtain the first organic mixture;

[0037] Soak 0.4% dispersant in 1% diethylene glycol butyl ether acetate according to the proportion, heat to 25°C, keep warm and stir for 1.5h to obtain the second organic mixture;

[0038] At room temperature, the first organic mixture obtained in S1, the second organic mixture obtained in S2, 0.3% modified hydrogenated castor oil, 2% diethylene glycol butyl ether acetate, 0.7% hexahydromethyl Phthalic anhydride, 1% trimethylolpropane triglycidyl ether, 1% ionomer and 0.1% 2-ethyl-4 methylimidazole are mixed to obtain the third organic composition;

[0039] Finally, 27.6% of the parti...

Embodiment 2

[0041]A low-temperature conductive silver paste for HIT solar cells, characterized in that: the low-temperature conductive silver paste is prepared from the following components according to mass percentage:

[0042]

[0043] Soak 3% of the silicone-modified epoxy resin into 0.83% of diethylene glycol butyl ether acetate according to the above formula, heat to 50° C., and keep it warm for 3 hours to obtain the first organic mixture;

[0044] Soak 0.4% dispersant in 1% diethylene glycol butyl ether acetate according to the proportion, heat to 5°C, keep warm and stir for 3 hours to obtain the second organic mixture;

[0045] At room temperature, the first organic mixture obtained in S1, the second organic mixture obtained in S2, 0.507% polyamide wax, 1.5% diethylene glycol dibutyl ether, 0.7% trimethylhexamethylene Diamine, 1% ionomer, 1% trimethylolpropane triglycidyl ether, 1.363% epoxy toughening agent and 0.1% 2-undecylimidazole are mixed to obtain the third organic compo...

Embodiment 3

[0048] A low-temperature conductive silver paste for HIT solar cells, characterized in that: the low-temperature conductive silver paste is prepared from the following components according to mass percentage:

[0049]

[0050] Soak 2% polyurethane modified epoxy resin into 0.33% diethylene glycol butyl ether acetate according to the above formula, heat to 80° C., and keep it warm for 1 hour to obtain the first organic mixture;

[0051] Soak 0.4% dispersant in 1% diethylene glycol butyl ether acetate according to the proportion, heat to 45°C, keep warm and stir for 1 hour to obtain the second organic mixture;

[0052] At room temperature, the first organic mixture obtained in S1, the second organic mixture obtained in S2, 0.107% polyamide wax, 1% diethylene glycol dibutyl ether, 0.7% aminoethyl piperazine, 1 % ionomer, 2.363% epoxy toughening agent, 1% trimethylolpropane triglycidyl ether and 0.1% 2-undecyl imidazole are mixed to obtain the third organic composition;

[005...

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Abstract

The invention discloses a low-temperature conductive silver paste for an HIT solar cell and a preparation method thereof. The low-temperature conductive silver paste for the HIT solar cell is preparedby the following components including, by weight, 27 to 46 Parts of flake silver powder, 46 to 65 parts of spherical silver powder, 1.5 to 3.5 parts of thermosetting resin, 0.5 to 1.5 parts of reactive diluents, 2 to 4 parts of organic solvents, 0.65 to 0.75 part of curing agent, 0.05 to 0.15 part of imidazole curing accelerator, 0.35 to 0.45 part of dispersing agent, 0.01 to 0.6 parts of thixotropic agent, 0 to 2.4 parts of epoxy toughening agents and 0.5 to 1.5 parts of polymers, and the total composition is 100 parts. The low-temperature conductive silver paste prepared by using the formula of the invention can form a bond with a substrate and has good wettability to the substrate, therefore, the filling factor of the solar cell is improved, and the photoelectric conversion efficiencyof the solar cell is improved.

Description

technical field [0001] The invention relates to the field of polymer-based conductive materials, in particular to a low-temperature conductive silver paste for HIT solar cells and a preparation method thereof. Background technique [0002] HIT is the abbreviation of HeterojunctionwithIntrinsic Thin-layer, which means intrinsic thin film heterojunction. Because HIT has been applied for as a registered trademark by Sanyo Corporation of Japan, it is also called HJT or SHJ (SiliconHeterojunctionsolarcell). This type of solar cell was first successfully developed by Sanyo Corporation of Japan in 1990, when the conversion efficiency could reach 14.5% (4mm 2 battery), and later, with the continuous improvement of Sanyo, the conversion efficiency of Sanyo HIT battery reached 25.6% in 2015. [0003] There is a layer of transparent optical conductive film (TCO) on the surface of the heterojunction solar cell, but the volume resistivity of the TCO film is relatively large. In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50C08K2003/0806C08L63/00
Inventor 朱鹏汪元元陈芬
Owner NANTONG T SUN NEW ENERGY CO LTD
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