Progress in fine-line metallization by co-extrusion printing on cast monosilicon PERC solar cells

Richter LP; Fischer G; Sylla L; Hentsche M; Steckemetz S; Muller M; Cobb CL; Solberg SE; Rao R; Elrod S; Palinginis P; Schneiderlochner E; Neuhaus DH

Solar Energy Materials and Solar Cells, Vol.142, 18-23, 2015

DOI10.1016/j.solmat.2015.05.023 Export Citation

Progress in fine-line metallization by co-extrusion printing on cast monosilicon PERC solar cells

Richter LP, Fischer G, Sylla L, Hentsche M, Steckemetz S, Muller M, Cobb CL, Solberg SE, Rao R, Elrod S, Palinginis P, Schneiderlochner E, Neuhaus DH

In this paper, we present our progress in co-extrusion printing for fine-line metallization. With this technique, 30 Am wide and 20 mu m tall front grid fingers are currently printed. Applied to industrial size cast silicon PERC solar cells, a world record conversion efficiency of 21.42% has been demonstrated. This result was achieved with a production-ready co-extrusion printer that runs at a throughput of 2700 wafers per hour. Furthermore, a printhead is presented that has been developed to enable co-extrusion printing on pseudo-square wafers. Finally the cost advantage of the technology is discussed. (C) 2015 Elsevier B.V. All rights reserved.

Keywords:Alternative metallization;Fine-line metallization;Co-extrusion;Dual print;Screen-print;Stencil print;Dispensing;High aspect ratio;Efficiency gain;Cast mono