DuPont Microcircuit Materials (MCM) has introduced DuPont ‘Solamet PV701’ photovoltaic metallization paste. Solamet PV701 advanced product composition enables the manufacture of back contact cell designs delivering up to 0.4% greater conversion efficiency for solar cells of Metal Wrap Through (MWT) technology for back side interconnected silicon solar cell designs. It is part of the business roadmap of proposed technology options to help enable the industry goal for conversion efficiency of crystalline silicon (c-Si) solar cells beyond 20% by 2012.
The function of the back-side silver or silver-aluminum conductor is to act as the interconnect part of the second electrode in the solar cell. Key requirements in achieving improved cell efficiency, is to have a strong ohmic contact, while enabling good solder ability of back side interconnected silicon solar cell designs.
DuPont Solamet PV701 photovoltaic metallization paste is specifically developed as an enabler to provide up to 0.4% greater efficiency in MWT cell designs versus standard cell designs. MWT is a specialized cell structure that transfers the bus bars on the front side to the back side, reducing shading on the front side of the cell. The connections are made through holes in the silicon with the same composition as the bus bars. Employed as a via paste and p-contact metallization for back side tabbing interconnects, Solamet PV701 features excellent electrical contact to front side silver grid structures, high-mechanical strength, low shunting, high-line conductivity and outstanding solderability as a p-contact metallization.
P-contact metallization paste for Metal Wrap Through (MWT) technology for back side interconnected silicon solar cell designs.
DuPont Solamet photovoltaic metallizations are part of a broad and growing portfolio of products represented by DuPont Photovoltaic Solutions (DPVS), which connects science and technology from across the company on a global scale to help support the dramatic growth in the photovoltaic industry.
February 2011 onwards.