Conductive pastes and solar cells comprising the same
A technology of solar cells and conductive paste, applied in the field of conductive paste, can solve the problem of absorbing long-wavelength light and the like
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Embodiment 1
[0039] Paste filled with nano-silver flakes and nano-silver wires:
[0040] 20 grams of acrylic resin (company: DSM; model: NEO B890) was dissolved in 35 grams of N-methylpyrrolidone (NMP) and 15 grams of acetone, and stirred in air with a stirrer for 30 minutes until cooled to room temperature. Next, 30 grams of nano-silver flakes (length and width are 5 μm; thickness is about 70 nm), 10 grams of nano-silver wires (diameter is about 80-100 nm; length 10-25 μm), 0.5 grams of foam stabilizer (company: BYK; Model: BYK390) and 0.5 g of defoamer (company: BYK; model: BYK-WS) were added into the paste and stirred at a speed of 200 rpm for 30 minutes. The paste that has been stirred is moved to the rolling mill and carried out rolling and dispersing three times. The obtained paste was coated on the surface of a glass substrate, heated at 100° C. for 10 minutes, and shaped. The formed conductive layer was detected by a four-point probe, and its sheet resistance was 0.0054 ohm / sq. ...
Embodiment 2
[0042] 17 grams of ethyl cellulose (ethyl cellulose) was dissolved in 45 grams of terpineol (terpineol), and stirred with a stirrer in air for 30 minutes until cooled to room temperature. Next, 20 grams of nano-silver sheets (length and width are 5 μm; thickness is about 70 nm), 20 grams of nano-silver wires (diameter is about 80-100 nm; length 10-25 μm) and 0.4 grams of defoaming agent (company: BYK; Model: BYKetoh-OK) was added into the paste and kept stirring at 200rpm for 30 minutes. The paste that has been stirred is moved to the rolling mill and carried out rolling and dispersing three times. The obtained paste was coated on the surface of a glass substrate, heated at 100° C. for 10 minutes, and shaped. The formed conductive layer was detected by a four-point probe, and its sheet resistance was 0.0042 ohm / sq.
Embodiment 3
[0044] 20 grams of acrylic resin (company: DSM; model: NEO B890) was dissolved in 35 grams of N-methylpyrrolidone (NMP) and 15 grams of acetone, and stirred in air with a stirrer for 30 minutes until cooled to room temperature. Next, 35 grams of nano-silver flakes (length and width are 5 μm; thickness is about 70 nm), 5 grams of nano-silver wires (diameter is about 80-100 nm; length 10-25 μm), 0.5 grams of foam stabilizer (company: BYK; Model: BYK390) and 0.5 g of defoamer (company: BYK; model: BYK-WS) were added into the paste and stirred at a speed of 200 rpm for 30 minutes. The paste that has been stirred is moved to the rolling mill and carried out rolling and dispersing three times. The obtained paste was coated on the surface of a glass substrate, heated at 100° C. for 10 minutes, and shaped. The formed conductive layer was detected by a four-point probe, and its sheet resistance was 0.0417 ohm / sq.
[0045] In the embodiments of the present invention, non-diffraction n...
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