Having continued to optimise its latest ‘Dual Print’ stencils and screens to provide fine-line front side silver contacts, DEK Solar, in conjunction with the Institute for Solar Energy Research Hamelin (ISFH) have reduced metallization silver cost to below US$0.01 per Wp, while achieving a 20.2% cell efficiency on a PERC solar cell.
The work was said to have been carried out last month at the ISFH facilities in Germany and utilized ISFH’s PERC cells, DEK Solar’s Eclipse metallization platform as well as its Dual Print screens and stencils, and optimized frontside silver metallization pastes from Heraeus.
Tom Falcon, DEK Solar’s Principal Engineer said, “Pushing the efficiency envelope without raising manufacturing costs isn’t just the ultimate objective of the PV industry; it’s a necessity. With this recent collaborative breakthrough, the efficiency-cost balance is now better than ever before.”
Brian Lau, director at DEK Solar added, “PERC solar cells are likely to be a dominant technology for solar cell architecture in the near future and DEK Solar, along with key industry partners, has already engineered a PERC metallization solution for next-generation high-efficiency, low-cost manufacturing which supports profitable growth for our customers.”
Previous work has resulted in 19.8% cell efficiencies with only 67.7mg of Ag per wafer. Increasing paste quantity only 7mg, resulted in the record conversion efficiencies, according to the company.