Nanocrystalline CuInS/sub 2/ and CuInSe/sub 2/ via low-temperature pyrolysis of single-source molecular precursors

Nanometer sized particles of the chalcopyrite compounds CuInS/sub 2/ and CuInSe/sub 2/ were synthesized by thermal decomposition of the molecular single-source precursors (PPh/sub 3/)/sub 2/CuIn(SEt)/sub 4/ and (PPh/sub 3/)/sub 2/CuIn(SePh)/sub 4/, respectively, in a non-coordinating solvent at temperatures below 300/spl deg/C. The nanoparticles range in size from 3-30 nm and are aggregated to form roughly spherical clusters of about 500 nm in diameter and can be deaggregated by capping with thiolated ligands. The nanoparticles are characterized by powder X-ray diffraction, scanning and tunneling electron microscopies, and optical spectroscopy.

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