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Copper Indium Gallium Selenium (CIGS) is one of high-performance solar cell among the other second generation of solar cell. The common method to fabricate CIGS solar cell use vacuum method such as evaporation, vapor transport deposition and electron-beam deposition that require high technology investment and expensive. The aim of this study is to investigate the synthesize of CIGS thin-film using a non-vacuum method as CIGS ink and coated by spin coating. The CIGS ink was synthesized by dissolving copper (II) acetylacetonate, gallium (III) acetylacetonate, and indium (III) acetylacetonate with oleylamine in a nitrogen atmosphere and then the solution was mixed with selenium and heated. The ITO substrate was coated by ZnO layer and then coated by CIGS using a spin coating method to make CIGS solar. The samples were characterized by XRD for crystal structure properties, SEM-EDX for morphology and chemical element analysis. The optical properties were performed by UV-Vis spectrometry. The results show that CIGS was successfully synthesized. The photoresponse and power conversion efficiency solar cell of the CIGS/ZnO film will be discussed.