INVESTIGATIONS ON THE INFLUENCE OF DIFFERENT ANNEALING STEPS ON SILICON SOLAR CELLS WITH SILVER THICK FILM CONTACTS

摘要

With annealing steps being used to improve industrial silicon solar cells with screen printed front sidecontacts, detailed investigations on different annealing processes on solar cells are presented in this paper. The focusis on the impact of an annealing step on the front side contact. We examine the influence of annealing steps differingin duration and temperature on a variety of monocrystaliline and multicrystalline silicon solar cells. The main goal ofthis study is to clarify the front contact’s sensitivity to annealing steps. Amongst other we study the behaviour ofover- and under-fired silicon solar cells towards annealing. Further, long term behaviour of annealed solar cells isinvestigated. Characterisation includes illuminated and dark IV curves and contact resistance measurements.