|
|||||
|
|
High Pressure as a Tool for Characterizing Charge Carriers in a Conducting Polymer |
|
| Authors: | J Mikat I Orgzall HD Hochheimer |
| Institution: | 1. Physik kondensierter Materie , Universit?t Potsdam , Am Neuen Palais 10, Potsdam , 14469 , Germany;2. Deutsches zentrum für Luft- und Raumfahrt , Institut für Verkehrsforschung , Rutherfordstra?e 2, Berlin , D-12489 , Germany Phone: #49-30-67055-278 Fax: #49-30-67055-278 E-mail: juergen.mikat@dlr.de;3. Interdisziplin?res Forschungszentrum für Dünne Organische und Biochemische Schichten, Hochdrucklabor , Universit?t Potsdam , Postfach 601553, Potsdam , 14415 , Germany;4. Department of Physics , Colorado State University , Fort Collins , CO , 80523 , USA |
| Abstract: | A characteristic feature of conducting polymers is the existence of localized charge carriers. The localization process is closely related to the charge carrier-phonon interaction, which is a function of local molecular properties of the polymer chain on which the carriers are localized. Depending on this interaction in conducting polymers with a non-degenerate ground state singly charged polarons or doubly charged bipolarons may exist. It will be shown that high pressure is a useful tool for studying charge carrier properties by influencing the local molecular conformation. A transition between both types of charge carriers is observed in polypyrrole. |
| Keywords: | High Pressure Conducting Polymers Polypyrrole Raman Spectroscopy Polarons Bipolarons |