Process optimization for edge passivation and high efficiency shingle heterojunction cells compatible with industry

Abstract

International audienceThe aim of this work is to provide optimization solutions for silicon heterojunction shingle solar (SHJ) cell edge passivation and make them more efficient, reliable and compatible with industry. From the ALD AlOx edge passivation solution successfully developed at CEA, the approach consist in investigating three ways of improvements: (i) the time spent between the separation process and the edge passivation treatment, (ii) the lower acceptable AlOx layer thickness and (iii) the capability of doing the AlOx edge passivation at the string level before PV module integration. This work is an update of the edge passivation solution developed at CEA