Conductive paste for positive electrode of solar cell as well as preparation method and application thereof
A technology for solar cells and conductive pastes, which is applied to equipment for manufacturing conductive/semiconductor layers, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc. The problems of sheet cutting process and tensile force can not meet the requirements, so as to avoid printing defects, improve printability and high battery conversion rate.
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[0054] Example 1
[0055] The conductive paste used in this embodiment adopts the following formula: 1.7% glass powder A, 1% glass powder B, 90% spherical silver powder, 2.2% organic vehicle, 3.65% diluent, 1.45% auxiliary agent, and its specific formula components As shown in Table 1.
[0056] The preparation method specifically includes the following steps:
[0057] A1) Preparation of glass powder A and glass powder B:
[0058] A11) According to the raw materials and proportions shown in Table 1, add TeO 2 , PbO, Bi 2 O 3 , SiO 2 , WO 3 , ZnO, Al 2 O 3 , B 2 O 3 , CaO, Na 2 O and MgO are mixed uniformly, heated, melted, cooled, ball milled, and sieved to obtain glass powder A. The D50 of the glass powder is preferably 1.8 μm.
[0059] A12) According to the raw materials and proportions shown in Table 1, add TeO 2 , Bi 2 O 3 , WO 3 , MgO, SiO 2 , Al 2 O 3 , Li 2 O, Na 2 O is mixed uniformly, heated, melted, cooled, ball milled, and sieved to obtain glass powder B. The D50 of the glass...
Example Embodiment
[0064] Example 2
[0065] The conductive paste used in this embodiment adopts the following formula: 2% glass powder A, 0.2% glass powder B, 92% spherical silver powder, 1.5% organic vehicle, 3% diluent, 1.3% auxiliary agent, and its specific formula components As shown in Table 1. The preparation method is basically the same as in Example 1, so it will not be described in detail.
Example Embodiment
[0066] Example 3
[0067] The conductive paste used in this embodiment adopts the following formula: 2.1% glass powder A, 0.5% glass powder B, 85% spherical silver powder, 6% organic carrier, 4.85% diluent, 1.55% auxiliary agent, and its specific formula components As shown in Table 1. The preparation method is basically the same as in Example 1, so it will not be described in detail.
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