Erlangen 2018 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 4: Photochemistry
MO 4.4: Vortrag
Montag, 5. März 2018, 14:45–15:00, PA 1.150
Fluorescence studies on photosensitizers based on thermally activated delayed fluorescence (TADF) dyes — •Ayla Päpcke1, Henrik Junge2, Stefan Lochbrunner1, Matthias Beller2, and Shu-Ping Luo3 — 1Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23, 18059 Rostock — 2Leibniz-Institut für Katalyse an der Universität Rostock e.V. — 3State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
As a result of the increasing scarcity of fossil fuels renewable energy fuels generated with the help of solar energy become a focus in current research. Photosensitizers responsible for the absorption of sun light play here a key role. In water reduction systems thermally activated delayed fluorescence (TADF) dyes can be used as efficient organic sensitizers. After an absorption event the water reduction catalyst (WRC) has to remove an electron from the excited singlet state of the TADF dye. The WRC acts as a mediator transferring the electron to protons in the water generating free hydrogen in a final step. Applying time resolved and stationary fluorescence measurements to the TADF dyes in the presence and absence of the WRC we investigate, if the proposed reaction scheme is indeed operational, and characterize the efficiency of the photo induced electron transfer steps.