New developments in metallization processes and materials for c-Si solar cells, is pushing conversion efficiencies towards the 20% range, a significant driver in reducing the cost-per-watt and keeping c-Si technologies competitive with alternative technologies such as thin-film. PV-Tech discusses these trends and developments with Peter Brenner, Photovoltaics Global Marketing Manager, Microcircuit Materials at DuPont. Brenner discusses both evolutionary approaches as well as more advanced approaches to metallization, including selective emitters.