Laser Based Foil-Metallization for Industrial PERC Solar Cells

Abstract

In this contribution we present different results of our investigations regarding the use of aluminium foil as rear side metallization for solar cells with dielectric passivation and laser fired contacts (LFC). We benchmark this metallization technology against more state of the art approaches like local contact opening (LCO) or laser fired contact– both in combination with screen printed and fired aluminum paste. Therefore we compare the IV-data from solar cells, processed on industrial pilot line equipment. Thereby we report an efficiency of 20.5% on industrially sized wafers (A=238 cm2) outperforming the state of the art technologies.