| abstract |
The present invention relates to a method for preparing III-VI2 nanoparticles and a thin film of polycrystalline light absorber layers. The method for preparing I-III-VI2 nanoparticles comprises the steps of : (al) preparing a mixed solution by mixing each element from groups I, III and VI in the periodic table with a solvent; (a2) sonicating the mixed solution; (a3) separating the solvent from the sonicated mixed solution; and (a4) drying the product resulted from the above step (a3) to obtain nanoparticles. According to the present invention, it is possible to easily obtain a thin film of polycrystalline light absorber layers having a desired composition by synthesizing I-III-VI2 nanoparticle precursors having a uniform size through ultrasonic processing, fabricating a thin film and then treating it with heat. Additionally, since it is unnecessary to carry out a conventional deoxidization process, according to the present invention, it is possible to simplify the conventional fabrication process, thereby being expected to significantly reduce production cost. |