On the electronic transport mechanism in thin films of some new poly(azomethine sulfone)s

• Published in: Acta materialia Vol. 55; no. 2; pp. 433 - 442
• Main Authors: Rusu, G.I., Airinei, A., Rusu, M., Prepeliţă, P., Marin, L., Cozan, V., Rusu, I.I.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2007; Elsevier Science
• Subjects: Absorption spectra; Applied sciences; Cross-disciplinary physics: materials science; rheology; Deposition; Electronic transport; Electronics; Exact sciences and technology; Materials science; Metals. Metallurgy; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Polymers; Resistivity; Spectra; Spin coating; Thin films; Transport; Thin films; Absorption spectra; Polymers; Electronic transport; Absorption; Electronics; Polymer; Application; Mechanism; Thin film
• ISSN: 1359-6454; 1873-2453
• DOI: 10.1016/j.actamat.2006.07.048

The studied polymers, poly(azomethine sulfone)s, were prepared by the reaction of bis(4-chlorophenyl)sulfone with a mixture of bisphenols: 2,2-bis( p-hydroxyphenyl)propane (bisphenol A) and 4,4′-bis(4-hydroxybenzylideneiminophenoxy)biphenyl in various molar ratios. The temperature dependences of the electrical conductivity and Seebeck coefficient of polymers were investigated using thin-film samples deposited from chloroform solutions (spin coating method) onto glass substrates. It was found that the respective polymers show typical semiconducting properties. Some correlations between these properties and the chemical structures of the polymers were established. The mechanism of electronic transport in the films studied is discussed. The study of optical absorption (in spectral range, 300–1400 nm) evidenced direct bandgaps ranged between 1.30 and 1.80 eV.