With this combined printing and etching technology, the high phosphorous doping layer is selectively etched on to the cell and only maintained in those places where contacts are subsequently printed. For this purpose a wax mask is applied in inkjet printing. The utilisation concept of the selective emitter increases the efficiency of the solar cell by up to 0.8%.

Inline system for producing selective emitters with the aid of inkjet printing technologies.

• Cell efficiency increased by up to 0.8%
• Simple inline linking of the inkjet printer DoD ProSeries with downstream wet processes such as edge isolation and phosphorous glass etching
• Contact-free printing of the smallest design characteristics with high positioning accuracy.
• Excellent process stability at a throughput of 2,200 wafers/h