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Title: A novel narrow band gap red light-emitting cyanovinylene polymer derived from 3,4-dialkoxy thiophene for optoelectronic applications
Authors: Manjunatha, M.G.
Adhikari, A.V.
Hegde, P.K.
Issue Date: 2010
Citation: Journal of Materials Science: Materials in Electronics, 2010, Vol.21, 8, pp.751-757
Abstract: A novel donor-acceptor type narrow band gap cyanovinylene poly{3,30-(3,4-ditetradecyloxythiene-2,5-diyl) bis[2-(thiophen-2-yl)prop-2- enenitrile]} has been designed and synthesized through multistep reactions. All the newly synthesized compounds were characterized by using FTIR and 1H NMR spectroscopy followed by elemental analyses. The polymer P is found to be thermally stable up to 300 C under nitrogen atmosphere. The optical and charge-transporting properties of the polymer were investigated by UV-visible, fluorescence emission spectroscopic and cyclic voltammetric studies. The monomer (M) emits intense green-light in solution state and the polymer (P) exhibited intense red-fluorescence both in solution and solid state. The fluorescence quantum yield of the polymer is determined to be 43%. Cyclic voltammetric studies reveal that the polymer possesses good charge carrying property. The electrochemical band-gap is estimated to be 1.8 eV. The studies reveal that the new cyanovinylene polymer P is a promising material for the development of efficient optoelectronic devices. Springer Science+Business Media, LLC 2009.
URI: 10.1007/s10854-009-9988-y
Appears in Collections:1. Journal Articles

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