Photoelectrochemical Polymerization of Thiophene on Self-Assembled RuL2(NCS)2/Di(3-Aminopropyl)Viologen on Indium Thin Oxide
Abstract:Polythiophene layers were formed on self-assembled monolayers (SAMs)/indium tin oxide (ITO) using photoelectrochemical polymerization. The SAMs on ITO was prepared using Ru(4,4′-dicarboxylic acid-2,2′-bipyridine)2 (NCS)2 and di(3-aminopropyl)viologen. The photoelectrochemically polymerized polythiophene layers on SAMs/ITO were characterized using UV-vis. absorption spectroscopy, atomic force microscopy, scanning electron microscopy, and cyclic voltammetry. The polymer layers have thickness of ∼360 nm, a dense surface morphology, optical gap of 2.38 eV, highest occupied molecular orbital of −5.2 eV and lowest unoccupied molecular orbital of −2.82 eV. In photoelectrochemical cells, the polythiophene on SAMs/ITO electrode showed a photocurrent of 5 A/cm2.
Document Type: Research Article
Publication date: May 1, 2011
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