| 摘要 |
PURPOSE:To improve efficiency, by providing an irregular structure on an Ti/ Ag/Ti layer, which is provided in the interface between an amorphous film and a stainless steel substrate, irregulary reflecting light, thereby lengthening the entire light path length to the length twice the thickness of the amorphous film. CONSTITUTION:On a stainless steel substrate 2, whose surface is finished in a mirror, Ti/Ag is evaporated by using an electron beam evaporation method at a room temperature. Thus the mirror surface substrate is obtained. The substrate is annealed at 300-800 deg.C, and Ti is evaporated. A Ti/Ag/Ti layer 3b having an irregular structure is prepared in this way. Light is scattered from the irregular structure of the amorphous solar battery, which has the Ti/Ag/Ti layer 3b having the irregular structure, which is obtained by annealing Ag. Therefore the length of the light path becomes long. Even if the thickness of an amorphous film is the same as that of the conventional device, the amount of light absorption is increased in comparison with the conventional device. Thus the conversion efficiency of the amorphous solar battery can be improved. The irregular structure of the Ti/Ag/Ti layer by the annealing can be readily realized by a relatively inexpensive, simple device. |
