Patent ID: 8053029

Claim:
A method for fabricating a three-component CuInS 2 thin film comprising: (1) fabricating a copper thin film by depositing an asymmetric copper precursor selected from the group consisting of copper ethylbutyrylacetate of Formula 1 and copper ethylisobutyrylacetate of Formula 2 on a substrate by metal-organic chemical vapor deposition (MOCVD); and (2) fabricating a CuInS 2 thin film by depositing an indium-sulfur-containing precursor of Formula (3) on the surface of the copper thin film by metal-organic chemical vapor deposition (MOCVD), wherein the deposition of the indium-sulfur-containing precursor in the step (2) is carried out a substrate temperature of 350° C. to 430° C., the composition ratio of copper, indium and sulfur components contained in the CuInS 2 thin film is 1:1:2, and the thin film thickness is 0.25 to 5 μm.