Titanium oxide nanoparticles (TiO2) were combined with polymethylthiophene (PMT), giving nanocomposites in core-shell structure via chemical polymerization. In this work, the current - voltage characteristics of sandwich cells composed from such nanocomposite have been studied. For these investigations films of nanocomposites were prepared by electrophoretic deposition (EPD). | Journal of Chemistry, Vol. 45 (6), P. 751 - 756, 2007 CURRENT - VOLTAGE CHARACTERISTICS OF POLYMETHYLTHIOPHENE/TiO2 NANOCOMPOSITE CELLS Received 8 November 2006 Vu Quoc Trung1, Thai Doan Tinh1, Tran Vinh Dieu2, Jiri Pfleger3 1 Faculty of Chemistry, Hanoi University of Education 2 Centre of Polymer Research, Hanoi University of Technology Institute of Macromolecular Chemistry, Czech Academy of Sciences 3 SUMMARY Titanium oxide nanoparticles (TiO2) were combined with polymethylthiophene (PMT), giving nanocomposites in core-shell structure via chemical polymerization. In this work, the current voltage characteristics of sandwich cells composed from such nanocomposite have been studied. For these investigations films of nanocomposites were prepared by electrophoretic deposition (EPD). I - INTRODUCTION II - EXPERIMENTAL Conducting polymer nanocomposites are rather prepared with interesting properties and application potentials [1 - 4]. Recently, such nanocomposites have been studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and photocurrent measurements [2 - 4]. In last paper, photoelectrochemical properties of PMT/TiO2 nanocomposite layers were reported [5]. The photocurrent spectra measured in electrolyte was performed at several bias potentials, discovering the separate photoelectrochemical signals from TiO2 (n-type semiconductor) and from PMT (p-type semiconductor). In sandwich cells, the photocurrent spectra showed the signals of p-n junction at 450 nm. In this work, current - voltage characteristics of such films are presented in order to study photoelectrical and electrical properties the cells fabricated from the PMT/TiO2 nanocomposites. 1. Preparation of PMT/TiO2 nanocomposites and sandwich cells Nanocomposites were prepared as described in Refs. [2 - 4]. The amount of PMT () in the composites was calculated from the data of the thermogravimetrical measurements (performed with a thermobalance, METTLER TG 50). For .
