The University of Western Ontario

Dave Love

Zhifeng Ding

Falong Jia

Daniel Vaccarello

Amy Tapley

Myong In Oh

A one-pot approach for preparing ArSH capped CuZnSnS, CuZnSn(SSe), CuSnS, CuInS, and CuIn(SSe)nanocrystals is provided. Examples involving reacting copper (II) acetylacetonate and indium chloride with thiourea and 2-mercapto-5-n-propylpyrimidine in the presence of an organic solvent are described. Monodispersed CuInS, nanocrystals having a size of about 100 nm were prepared. Examples involving reacting copper (II) acetylacetonate, zinc chloride, and tin chloride with thiourea and 2-mercapto-5-n-propylpyrimidine in the presence of an organic solvent are described. Monodispersed CuZnSnSnanocrystals having a size of about 2 nm were prepared. Nanociystals obtained were found to have excellent crystallinity, stoichiometry, and high collective photovoltaic activity without the need for postprocessing such as high temperature annihilation in a sulfur atmosphere.

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Orillia, Canada

Dave Love