Synthesis and Characterization of Fluorinated β-Ketoiminate Zinc Precursors and Their Utility in the AP-MOCVD Growth of ZnO:F

Abstract

A novel family of zinc bis(β-ketoiminate) complexes 2b-2h have been synthesized by reaction of the isolated free ligands 1a-h with dimethylzinc. The isolated zinc complexes were characterized by elemental analysis, NMR spectroscopy, and in the case of 2b-d and 2f-h, the molecular structures of the complexes were determined by single-crystal X-ray diffraction which reveals the compounds to be pseudo-octahedral six-coordinate, monomeric homoleptic complexes in the solid state. TG analysis showed complexes 2b-f all to have residual masses at 400 °C of 10 % or less, well below the value for ZnO and thus indicative of volatility. Of these systems 2b [Zn{MeC(O)CHC(NCH2CH2OMe)CF3}2] has been investigated for its utility in the AP-MOCVD growth of F-doped ZnO (ZnO:F) in the absence of additional oxidant at 400 °C on glass and silicon substrates.