Photovoltaic device

Abstract

A solar cell comprising: a first junction part having a first conductivity type first semiconductor film and a second conductivity type second semiconductor film formed on an upper surface of said first semiconductor film; and a second junction part having a first conductivity type third semiconductor film formed on an upper surface of said second semiconductor film and a second conductivity type fourth semiconductor formed on an upper surface of said third semiconductor film, said junction parts arranged from that having a larger forbidden band width along the direction of progress of light through said semiconductor layers, said first, second, third, and fourth semiconductor films being formed of single-crystalline filming; wherein an interlayer conductor prepared from a metal forming ohmic junctions with each of said junction parts and having a thickness capable of transmitting light therethrough is interposed between said first and second junction parts; and wherein said second semiconductor film arranged on one side of said interlayer conductor is different in crystal orientation from said third semiconductor film arranged on the other side of said interlayer conductor.

Dependencies are inferred from the claim text.