DENSE CHALCOPYRITE CuInSe2 THIN FILMS PREPARED WITH ETHANOL-BASED In2Se3-Cu+ INK

Here, we show a novel ink containing ethanol, In2Se3 nanosheets and Cu+ that can be used as the sol for filming by dip coating method. And pure chalcopyrite (CH) CuInSe2 (CIS) thin films were obtained when In2Se3 nanosheets with poor crystallinity as a component of the ink. We described the formation of the CH CIS films that exhibit (112)-orientation and dense structure without interspace. Hall measurement shows that the CIS film sintered at 550 degrees C has an electrical resistivity of 3.19 Omega.cm and carrier concentration of 2.63x10(17) cm(-3), which meet the requirements of high performance solar cell absorption layer.