Patent ID: 9112067
Filing Date: 2015-08-18
Classification: H01L,Y02E

Abstract:
1. A solar cell comprising: an insulating substrate; a metal film over and in direct contact with the insulating substrate; a copper (Cu) plating film over and in direct contact with the metal film; a seed film over and in direct contact with the Cu plating film; a barrier film over and in direct contact with the seed film; a photoelectric conversion layer over and in direct contact with the barrier film; an electrode layer over the photoelectric conversion layer; a first wiring over and in direct contact with the metal film, the first wiring does not overlap with the Cu plating film; and a second wiring over and in direct contact with the electrode layer, wherein the Cu plating film is formed by growth from the seed film, wherein the electrode layer is formed with a transparent conductive material, wherein the barrier film is one of titanium (Ti) film, tantalum nitride film, tantalum (Ta) film and tungsten (W) film, and wherein the photoelectric conversion layer is a single crystal silicon film wherein a thickness of the single crystal silicon film is larger than or equal to 50 nm and smaller than or equal to 200 nm.