Patent ID: 9112070
Filing Date: 2015-08-18
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell comprising: a semiconductor substrate doped with a first conductive type impurity through which a via hole passing from a first surface of the semiconductor substrate to a second surface thereof facing the first surface is formed, wherein the first surface is a light receiving surface; upper and lower emitter layers respectively formed on upper and lower surfaces of the semiconductor substrate and doped with a second conductive type impurity that is different from the first conductive type impurity; current collecting layers formed on sidewalls of the via hole and doped with a higher concentration of the first conductive type impurity than that of the semiconductor substrate; a contact electrode extending from the first surface of the semiconductor substrate to the second surface thereof so as to fill the via hole; and upper and lower electrodes respectively contacting the upper and lower emitter layers.