Patent ID: 8129613
Filing Date: 2012-03-06
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for forming a photovoltaic cell, the method comprising: implanting hydrogen and/or helium ions through a first surface of a monocrystalline semiconductor donor wafer to define a cleave plane, the donor wafer having a resistivity that is less than about 0.5 ohm-cm; cleaving a semiconductor lamina from the donor wafer at the cleave plane, wherein the lamina has a thickness less than about 20 microns; and completing fabrication of the photovoltaic cell, wherein a base region consists of the lamina, and the base region in combination with an emitter forms an active region of the photovoltaic cell, wherein resistivity of the base region is less than about 0.5 ohm-cm.