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A stylus-based adhesion tester was used to characterise the adhesion of metal fingers on silicon solar cells. The measured lateral force together with the failure modes of finger cut-off and dislodgment, were identified for screen-printed silver contacts and nickel/copper plated laser-doped selective emitter cells. In-situ images were recorded to visualise the dynamics of the adhesion testing process...
This paper describes a patterning and plated metallization process that can be used for bifacial heterojunction silicon solar cells. Patterning was achieved by inkjet printing a functional fluid onto a resist surface, the fluid being able to chemically inhibit resist cross-linking in a subsequent thermal process. Copper/tin plated fingers as narrow as 20μm were achieved on both surfaces of the cell...
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