Patent ID: 7935562
Filing Date: 2011-05-03
Classification: H01L,Y02E,Y02P

Abstract:
1. Method for annealing at least one photovoltaic cell comprising a substrate based on silicon with a first type of conductivity, a layer doped with a second type of conductivity produced in the substrate and forming a front face of the substrate, an antireflection layer produced on the front face of the substrate and forming a front face of the photovoltaic cell, at least one metallization on the front face of the photovoltaic cell and at least on metallization on a rear face of the substrate, which method comprising at least the steps of: a) a first annealing of the photovoltaic cell at a temperature between around 700° C. and 900° C., b) a successive second annealing of the photovoltaic cell at a temperature between around 200° C. and 500° C., at ambient pressure and in ambient air, and performed during a period of between around 10 seconds and 2 minutes, with hydrogen being diffused in the substrate during the process.