Novel Route for the Preparation of CuSe and CuInSe 2 Nanoparticles

Good quality, close to mono-dispersed, nanoparticles of CuSe and CuInSe 2 have been prepared from thermolysis reactions in tri- n -octylphosphine oxide (TOPO). Bis(diethyldiselenocarbamato)-copper(II) ([Cu(Se 2 CNEt 2 ] ) 2 ») was used to prepare CuSe and TOPSe, CuCI and InCl 3 were reacted to form CuInSe 2 . HRTEM images showed that the particles have reasonable monodispersity and are crystalline. Clear lattice fringes were observed in single dots of CuInSe 2 ( ca. 4 nm) and CuSe ( ca. 16 nm). The particles are capped with TOPO and the SAED pattern showed cubic CuInSe 2 and hexagonal CuSe.