Abstract
Na-doped CuInSe_2 (CIS) thin films were prepared by using sodium compounds such as Na_2S and Na_2S_2O_3 on glass slide substrate. The samples have been deposited in a two-stage process. In the first stage, the precursors were evaporated on glass slide substrate by thermal evaporation method in vacuum chamber. The selenization , named the second stage , was performed inside a partially closed graphite box at 550 C for 30 min in argon atmosphere with elemental Se incorporation. The obtained Na-doped CuInSe_2 thin films showed the chalcopyrite structure with predominant growth in the (112) orientation. The lattice parameters have been evaluated from XRD patterns. The optical and electrical properties of the obtained films were also investigated.
