Low-temperature silver paste for low-density HIT solar cell and preparation method thereof
A solar cell, low-density technology, used in circuits, electrical components, conductive materials dispersed in non-conductive inorganic materials, etc. , the effect of unit cost reduction
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Example Embodiment
[0025] Example 1
[0026] The preparation method of the low-temperature silver paste for low-density HIT solar cells of this embodiment is to accurately weigh 270 grams of bisphenol A epoxy resin and 80 grams of butyl glycidyl ether and mix them thoroughly, and continue to add 650 grams of silver paste under stirring conditions. Flaky low bulk density silver powder with an average particle size of 5um and a bulk density of 1.17 g / cm3. Stir at room temperature for 30 minutes to ensure that the silver powder is evenly dispersed in the epoxy resin, then add 4 grams of maleic anhydride and then disperse for 1 hour, and degas under low pressure to obtain a low-temperature silver paste for low-density HIT solar cells. The specific characteristics are as follows:
[0027] Viscosity: 152,500mPa.s
[0028] Adhesive strength: 7MPa (adhesive substrate is aluminum)
[0029] Density: 1.15 g / cm3
[0030] Curing speed: 12 minutes (120°C)
[0031] Volume resistivity: 2.6×10 -5 Ω.cm
[0...
Example Embodiment
[0036] Example 2
[0037] The preparation method of the low-temperature silver paste for low-density HIT solar cells of the present embodiment is to accurately weigh 280 grams of cyclopentadiene epoxy resin and 60 grams of ethyl acetate and fully mix them, and continue to add 700 grams of flakes under stirring conditions. Low bulk density silver powder, with an average particle size of 13um and a bulk density of 1.56 g / cm3. Stir at room temperature for 30 minutes to ensure that the silver powder is evenly dispersed in the epoxy resin, then add 3 grams of diethylenetriamine and disperse for 1 hour, and degas under low pressure to obtain a low-temperature silver paste for low-density HIT solar cells. The specific characteristics are as follows:
[0038] Viscosity: 230,000mPa.s
[0039] Adhesive strength: 9MPa (adhesive substrate is aluminum)
[0040] Density: 1.52 g / cm3
[0041] Curing speed: 20 minutes (120°C)
[0042] Volume resistivity: 1.8×10 -5 Ω.cm
[0043] Volume re...
Example Embodiment
[0045] Example 3
[0046] The preparation method of the low-temperature silver paste for low-density HIT solar cells of this embodiment is to accurately weigh 300 grams of glycerin epoxy resin and 50 grams of benzyl alcohol and mix them thoroughly, and continue to add 580 grams of needle-shaped low bulk density under stirring Silver powder has an average particle size of 7um and a bulk density of 1.33 grams per cubic centimeter. Stir at room temperature for 30 minutes to ensure that the silver powder is evenly dispersed in the epoxy resin, then add 3.5 grams of phthalic anhydride and then disperse for 1 hour, and degas under low pressure to obtain a low-temperature silver paste for low-density HIT solar cells. The specific characteristics are as follows:
[0047] Viscosity: 92,500mPa.s
[0048] Adhesive strength: 6MPa (adhesive substrate is aluminum)
[0049] Density: 1.28 g / cm3
[0050] Curing speed: 7 minutes (120°C)
[0051] Volume resistivity: 7.6×10 -5 Ω.cm
[0052]...
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