The photovoltaics unit of Heraeus has developed SOL9235H, a new front-side silver paste. The cadmium-free paste provides improved contact quality and aspect ratios on both mono- and multicrystalline wafers and a wide range of sheet resistance emitters, according to the company.
Customers who tested this new front-side paste during the development and scale-up phase reported increases of cell absolute output efficiencies in the 0.2% to 0.4% range – higher any other silver paste available on the market today, says Andy London, manager of the PV business unit at Heraeus.
‘The chemistry of SOL9235H enhances the etching of the anti-reflective coating and significantly improves the contact quality of the cell during the spike firing process,’ explains London. ‘The paste also provides a very high printed aspect ratio feature, which further boosts current density and fill factor of the cell.’
Heraeus: (610) 825-6050