Patent ID: 7999177

Claim:
A solar cell structure, comprising: a substrate, a solar cell including a back electrode layer formed on an upper surface of said substrate, a photovoltaic layer formed on an upper surface of said back electrode layer, and a transparent conductive film layer formed on an upper surface of said photovoltaic layer, and an optical thin film in which a first silicon dioxide (SiO 2 ) layer, an aluminum oxide (Al 2 O 3 ) layer, a niobium pentoxide (Nb 2 O 5 ) layer, a magnesium fluoride (MgF2) layer, a niobium pentoxide (Nb 2 O 5 ) layer, and a second silicon dioxide (SiO 2 ) layer are formed directly on the transparent conductive film layer in the aforementioned order, wherein the aluminum oxide (Al 2 O 3 ) layer directly follows and contacts the first silicon dioxide layer.