Patent ID: 8883550

Claim:
A process for making a thin film solar cell on a substrate comprising: (a) providing a substrate; (b) depositing a bottom layer of a first ink onto the substrate, wherein the first ink contains one or more polymeric precursor compounds, wherein the polymeric precursor compounds have repeating units {M A (ER)(ER)} and {M B (ER)(ER)}, and wherein M A is a Group 11 atom, M B is a Group 13 atom, E is a chalcogen, and R is selected from alkyl, aryl, heteroaryl, alkenyl, amido, and silyl; (c) heating the bottom layer; (d) depositing a top layer of a second ink onto the bottom layer, wherein the second ink contains one or more metal atom chalcogenide inorganic source compounds; and (e) heating the top and bottom layers.