Abstract
Photophysical and electrical properties of new synthesized 2,6-polyphenylquinolines (PPQs) containing an oxygen or phenylamine bridging group between quinoline cycles and, as an arylene radical, alkylated derivatives of carbazole or indolo[3,2-b]carbazole are studied. It is shown that the photosensitivity for new PPQs is 104–105 cm2/J and the photogeneration quantum yield of free carriers is as high as 0.15. Photophysical parameters increase with the phenylamine bridging group in place of the oxygen one and when using indolocarbazole instead of carbazole. It is found that a film of polyphenylquinoline containing an oxygen bridging group and an alkylcarbazole fragment in the polymer repeat unit exhibits “white” luminescence. Both electron and hole transport with a mobility of ∼10−6 cm2/(V s) are detected in films of all studied polymers. The conductivity value and type can be controlled by varying the chemical structure of the (oxygen or phenylamine) bridging group between PPQ cycles and by choosing carbazole or indolo[3,2-b]carbazole derivatives as an arylene radical.
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Original Russian Text © V.M. Svetlichnyi, E.L. Aleksandrova, L.A. Myagkova, N.V. Matyushina, T.N. Nekrasova, R.Yu. Smyslov, A.R. Tameev, S.N. Stepanenko, A.V. Vannikov, V.V. Kudryavtsev, 2011, published in Fizika i Tekhnika Poluprovodnikov, 2011, Vol. 45, No. 10, pp. 1392–1398.
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Svetlichnyi, V.M., Aleksandrova, E.L., Myagkova, L.A. et al. Photophysical and electrical properties of polyphenylquinolines containing carbazole or indolo[3,2-b]carbazole fragments as new optoelectronic materials. Semiconductors 45, 1339–1345 (2011). https://doi.org/10.1134/S1063782611100204
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DOI: https://doi.org/10.1134/S1063782611100204