Recently, donor-acceptor polymers have attracted much attention as their alternating electron-rich and poor units result in a low-bandgap energy, and large spatial extent of the exciton wavefunction. Experimentally, the impact these units have on charge generation in thin films of mixed-phase polymer blends is not well known. Polymer films of mixed-phase are of particular interest as the increase in the number of interfaces creates the opportunity for an increase in charge separation and recombination events. In this work, we will report on the photogeneration in polymer thin films of bithiophene diketopyrrolopyrrole octylthiolthiophene benzodithiophene (ThDPP-OSThBDT): fullerene using 2D photocurrent spectroscopy. These studies will illustrate quantitatively the effectiveness of charge generation and migration in this material systems.

Photogeneration in donor-acceptor polymers blends

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.