Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 33: Poster Tuesday: Ultrafast Processes 2
O 33.9: Poster
Dienstag, 6. September 2022, 11:00–13:00, P3
Ultra Fast Dynamics in Modified Thiophene based Conjugated Donor-Acaptor Organcic Polymers — •Tobias Reiker1,2, Carsten Winter1, Deb Kumar Bhowmick1,2, Nils Fabian Kleimeier1,2, Zitong Liu3, Deqing Zhang3, and Helmut Zacharias1,2 — 1Center for Soft Nanoscience, University of Münster, Germany — 2Physikalisches Institut, University of Münster, Germany — 3Institute of Chemistry, Chinese Academy of Science, Beijing, China
Thiophene-based polymers are promising candidates for solar cell, OLED or transistor applications. An internal donor - acceptor system is formed by coupling thiophene polymers with pyrrole chains. The charge transport behavior can be tuned by different alkyl side chains since they influence the electronic structure. A direct assessment of the intramolecular and intermolecular dynamics may guide synthesis routes. With pDPP4T, pDPP4T and pDPTTT we investigated the electronic dynamics of verified high hole-mobility organic semiconductors. Either the backbone or the side chains were modified. In contrast, another polymer pF8T2 with bi-thiophene in the backbone was used, but with fluorene instead of pyrrole as acceptor. These different molecular configurations are intended to provide insights into the change in electron configuration due to both backbone modification and intermolecular packing. We report results of temporally resolved photoemission studies on thiophene polymers on silicon substrates.