Polysilylenes: charge carrier transport and photogeneration

0189347 - UMCH-V 20033302 RIV NL eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA202/01/0518
Výzkumný záměr: CEZ:AV0Z4050913
Klíčová slova: polysilylenes * charge carrier transport * photogeneration
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.042, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0085170