Patent ID: 8921691
Filing Date: 2014-12-30
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell comprising: a substrate selected from a material selected from the group consisting of a heat resistant polyimide and a ceramic; a lower electrode layer; a photoelectric conversion layer having a chalcopyrite structure that includes a Group Ib element, a Group IIIb element and a Group VIb element; and an upper electrode layer, the lower electrode layer, the photoelectric conversion layer and the upper electrode layer being sequentially formed on top of the substrate; and a silicate layer provided between the substrate and the lower electrode layer, the silicate layer comprising Na an alkali metal derived from the silicate layer being diffused from the silicate layer to the photoelectric conversion layer via the lower electrode layer, the solar cell being formed substantially without incorporation of a precursor of the diffused alkali metal between the lower electrode layer and the photoelectric conversion layer or between the photoelectric conversion layer and the upper electrode layer.