Materials Science Forum, Vol.449-4, 273-276, 2004
Synthesis of CuInSe2 and CulnGaSe(2) nanoparticles by solvothermal route
Chalcopyrite CulnSe(2) (CIS) and CuInGaSe2 (ClGS) nanoparticles were directly synthesized by a solvothemal route in art autoclave with alkylamine as a solvent. The rod-like CIS nanoparticles with widths of 5-10 nm and lengths of 10-30 nm were obtained at 180degreesC for 36 hour whereas spherical nanoparticles with diameter in the range of 10-80 nm were observed at 200-250degreesC for 36 hour. A morphology change from spherical to rod-like CIS nanoparticles was observed at 190degreesC as reaction time increased from 36 to 60 hour. The formation of the rod-like nanoparticles in diethylamine, without double N-chelation, was explained by the SLS (Solution-Liquid-Solid) mechanism. Spherical CIGS nanoparticles with diameter in the range of 30-80 nm were obtained in ethylenediamine at 280degreesC for 14 hour. The products were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution scanning electron microscopy (HRSEM).