Polysilylenes: charge carrier transport and photogeneration

0189347 - UMCH-V 20033302 RIV NL eng J - Journal Article
Nešpůrek, Stanislav - Sworakowski, J. - Kadashchuk, A. - Toman, Petr
Polysilylenes: charge carrier transport and photogeneration.
Journal of Organometallic Chemistry. Roč. 685, 1-2 (2003), s. 269-279. ISSN 0022-328X. E-ISSN 1872-8561
R&D Projects: GA ČR GA202/01/0518
Institutional research plan: CEZ:AV0Z4050913
Keywords : polysilylenes * charge carrier transport * photogeneration
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.042, year: 2003

Charge carrier transport and photogeneration in polysilylenes, specifically in poly[methyl(phenyl)silylene], are discussed. Electronic properties are influenced by electron delocalization along the silicon backbone. A model of disordered polarons seems to be adequate to describe the charge carrier transport properties. Dissociation of ion pairs in external electric field, which can be described in terms of the Onsager theory of geminate recombination, seems to be the main mechanism of the free charge carrier photogeneration. Polar additives or polar side groups attached to the polymer backbone locally modify the ionization energy of the polymer segments and energy of electrostatic interactions of charge carriers and the dipoles. These changes result in the creation of local states for charge carriers and in the formation of a potential well structure.
Permanent Link: http://hdl.handle.net/11104/0085170