TY - JFULL AU - Won Song and Bo-Ra Koo and Seok Eui Choi and Yong-Taeg Oh and Dong-Chan Shin PY - 2012/1/ TI - Optical and Structural Properties of a ZnS Buffer Layer Fabricated with Deposition Temperature of RF Magnetron Sputtering System T2 - International Journal of Materials and Metallurgical Engineering SP - 1223 EP - 1226 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/10172 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 72, 2012 N2 - Optical properties of sputter-deposited ZnS thin films were investigated as potential replacements for CBD(chemical bath deposition) CdS buffer layers in the application of CIGS solar cells. ZnS thin films were fabricated on glass substrates at RT, 150oC, 200oC, and 250oC with 50 sccm Ar gas using an RF magnetron sputtering system. The crystal structure of the thin film is found to be zinc blende (cubic) structure. Lattice parameter of ZnS is slightly larger than CdS on the plane and thus better matched with that of CIGS. Within a 400-800 nm wavelength region, the average transmittance was larger than 75%. When the deposition temperature of the thin film was increased, the blue shift phenomenon was enhanced. Band gap energy of the ZnS thin film tended to increase as the deposition temperature increased. ZnS thin film is a promising material system for the CIGS buffer layer, in terms of ease of processing, low cost, environmental friendliness, higher transparency, and electrical properties ER -