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O: Fachverband Oberflächenphysik
O 37: Poster: Ultrafast Electron Dynamics at Surface and Interfaces II
O 37.13: Poster
Tuesday, March 28, 2023, 18:00–20:00, P2/EG
Time Resolved Photoelectron Spectroscopy of Thiophen based Conjugated Donor Aceptor Polymers for Organic Photovoltaic — •Tobias Reiker1, Pradny Phanse1, Nils Fabian Kleimeier1, Zitong Liu2, Adrian Urban1, Deqing Zhang2, and Helmut Zacharias1 — 1Center for Soft Nanoscience, University of Münster, Germany — 2Institute 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. We report results of temporally resolved photoemission studies on thiophene polymers on silicon substrates. The charge transport behaviour can be tuned by different alkyl side chains since they influence the electronic structure and aggregation. A direct assessment of the intramolecular and intermolecular dynamics may guide synthesis routes. With pF8T2, pDPP4T, pDPP4T-1 and pDPTTT we investigated the electronic dynamics of high hole-mobility organic semiconductors. Either the backbone or the side chains were modified. With the blend of pDPP4T-1 and a Fullerene we compare the excitation dynamics of singe component und blended OPV. These different molecular configurations are intended to provide insights into the change in electron configuration due to both backbone modification and intermolecular packing.