Patent ID: 8709858
Filing Date: 2014-04-29
Classification: C23C,H01L,Y02E,Y02P,Y10T

Abstract:
1. A process for reducing or eliminating the band gap shift in the production of a photovoltaic system, said production process comprising: oligomerizing or polymerizing a mixture comprising a silane and a germanium compound to form a formulation comprising the silane, the germanium compound and a co-oligomerized product consisting of units of the silane and the germanium compound; coating a flat surface of a substrate with the formulation, wherein during the coating the formulation is in liquid form, to obtain a coated substrate, irradiating, thermally treating, or both irradiating and thermally treating the coated substrate to obtain an at least partially polymorphic layer comprising silicon and germanium on the flat surface of the substrate; wherein the germanium compound is of formula Ge wherein the silane is of formula (i) Si