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    Nanocomposite p-n Junction Polycarbazole CdSe/TiO2 Thin Films on ITO via Electrochemical Crosslinking

    Year: 2012

    Journal: Macromolecular Materials and Engineering 2012, 297 (9) pp 875-886, 20121211

    Authors: Antonio F. Frau, Yushin Park, Roderick B. Pernites, Rigoberto C. Advincula

    Organizations: Department of Chemistry and Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204-5003, USA; Case Western Reserve University, Department of Macromolecular Science and Engineering, 2100 Adelbert Road, Kent Hale Smith Bldg., Cleveland, Ohio 44106, USA

    The fabrication and characterization of a hybrid polymer p-n junction-type thin film via electropolymerization of NPs and a precursor polymer is described. Blends of TiO2 NPs, CdSe NCs, Cbz-COOH, and PVK were utilized to enable electrochemical deposition on ITO glass substrates. Spectroscopic, microscopic, and wetting measurements confirmed thin film fabrication. CV yielded a CPN nanocomposite with electropolymerized (i.e., crosslinked) carbazole units embedding CdSe NCs. Absorption and emission measurements confirmed a charge transfer mechanism between the crosslinked carbazole and the NCs resulting in a p-n junction-type thin film on ITO; with the observed quenching of CdSe NC emission. Several possible applications of such thin films are also discussed.