High-tensile strength anti-hidden cracking solar cell back side silver slurry and preparation method thereof
A solar cell, high-strength technology, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as short service life and silicon layer shedding, and achieve the effect of convenient sampling
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[0065] The preparation method of the high-strength anti-cracking solar cell back silver paste includes the following steps:
[0066] a. Preparation of glass powder: Weigh the raw materials of the glass powder according to the formula ratio, mix them evenly, dry them in an oven at 120-220℃ for 1-1.5h, and then preheat at 700-850℃ for 0.5-1.0h , Then smelt at 1000-1400°C for 1 hour, quench with deionized water, dry, and then ball mill for 5-10 hours, dry and sieving to obtain glass powder with an average particle size of less than 5μm; in step a, the glass powder is mixed Afterwards, it needs to be ground and dispersed until the color is uniform before drying;
[0067] b. Preparation of organic adhesive: After weighing the raw materials of the organic adhesive according to the formula ratio, after mixing them evenly, stir while heating in a mixer at a temperature of 90-160℃, and dissolve for 1.5-2.5h to obtain an organic adhesive. Mixture: In the preparation of organic binder in ste...
Example Embodiment
[0080] Example one of preparation method:
[0081] a. Preparation of glass powder: Weigh Bi 2 O 3 41.9%, CaO 8.2%, ZnO 16.8%, TiO 2 0.7%, Al 2 O 3 9.3%, SiO 2 6.6%, B 2 O 3 16.5%, mixed uniformly, dried in an oven at 165℃ for 1h, then preheated at 750℃ for 0.8h, then smelted at 1200℃ for 1h, quenched with deionized water, dried, then ball milled for 8h, dried After sieving, obtain glass powder with an average particle size of less than 5μm;
[0082] b. Preparation of organic binder: Weigh 8.5% of alcohol ester twelve, 65.8% of butyl carbitol acetate, 8.3% of ethyl cellulose, 12.3% of diethylene glycol butyl ether, and polyvinyl butyral 2.5%, sorbitan stearate 2.6%, after mixing uniformly, stir while heating in a mixer at a temperature of 120°C, and dissolve for 2h to obtain an organic binder;
[0083] c. Preparation of back silver paste: Pour 62.1% silver powder, 3.5% glass powder, 28% organic binder, 1.2% adhesion promoter, 1.2% additives and 4% additives into the vacuum mixer....
Example Embodiment
[0089] The second embodiment of the preparation method:
[0090] a. Preparation of glass powder: Weigh Bi 2 O 3 31.5%, CaO 11%, ZnO 18.8%, TiO 2 0.6%, Al 2 O 3 11.8%, SiO 2 9.8%, B 2 O 3 16.5%, mixed uniformly, dried in an oven at 165℃ for 1h, then preheated at 750℃ for 0.8h, then smelted at 1200℃ for 1h, quenched with deionized water, dried, then ball milled for 8h, dried After sieving, obtain glass powder with an average particle size of less than 5μm;
[0091] b. Preparation of organic adhesive: weigh 12.5% of alcohol ester 12, butyl carbitol acetate 55.6%, ethyl cellulose 8.8%, diethylene glycol butyl ether 16.3%, polyvinyl butyral 2.6%, 4.2% sorbitan stearate, after mixing uniformly, stir while heating in a mixer at a temperature of 120°C, dissolve for 2h to obtain an organic binder;
[0092] c. Preparation of back silver paste: Pour 58.8% of silver powder, 5.6% of glass powder, 29.7% of organic binder, 1.5% of adhesion promoter, 1.4% of additives and 3% of additives into...
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