Doping type solar cell front silver paste
A technology for solar cells and silver paste, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials. It can solve problems such as insufficient bonding and reduce sheet resistance, bonding performance and electrode The electrical properties are uniform and the bonding strength is enhanced.
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Embodiment 1~5
[0021] The present invention is a doped solar cell front silver paste. The components and weight percentages of the paste in Examples 1-5 are shown in Table 1.
[0022] Table 1:
[0023]
[0024] In embodiment 1~5, the tap density of silver powder is 4.5-5.5g / cm 3 , the average particle size is 1~3μm. The glass powder is a glass system of lanthanum, boron, and zinc, with an average particle size of 1-3 μm. The sintering accelerator is compound A(Zn(CH 3 (CH 2 ) 16 COO) 2 ), where A contains the element indium In.
[0025] In embodiment 1, the composition of glass powder and percentage by weight thereof are: La 2 o 3 0.5%, B 2 o 3 85%, Al 2 o 3 2%, ZnO2%, Na 2 O1%, LiO 2 3%, V 2 o 5 6% and P 2 o 5 0.5%. Compound A(Zn(CH 3 (CH 2 ) 16 COO) 2 ), A is elemental indium In, the compound A (Zn(CH 3 (CH 2 ) 16 COO) 2 ) is obtained by the following method: take zinc stearate Zn(CH 3 (CH 2 ) 16 COO) 2 Dissolve the raw materials in a solvent, add raw mate...
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