Photophysics of Charge Transfer Complexes Formed by Tetracene and Strong Acceptors
Source abstract
Abstract
Organic charge transfer complexes (CTCs) with near-infrared absorption received growing interest in the past years, but the details of their photophysics, especially in thin films, remain largely unknown. We combined experimental and computational methods to thoroughly investigate and compare CTCs formed by tetracene with 2,2′-(perfluoronaphthalene-2,6-diylidene)dimalononitrile and 2,3,5,6-tetrafluoro-7,7,8,8,-tetracyanoquinodimethane, respectively. Using ultrafast transient absorption spectroscopy, the photophysics of these small bandgap CTCs was revealed, which is dominated by a sub-picosecond relaxation of the excitons back to the ground state. In equimolar blends, tetracene singlet fission is suppressed while in blends with excess of tetracene reduced lifetimes of tetracene, singlet and triplet excitons were found.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Photochemistry and Electron Transfer Studies · Organic Electronics and Photovoltaics · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
Carl von Ossietzky Universität Oldenburg, Institute of Physics, Carl-von-Ossietzky-Straße 9, 26129 Oldenburg, Germany
Humboldt-Universität zu Berlin, Physics Department and IRIS Adlershof, Zum Großen Windkanal 6, 12489 Berlin, Germany
Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
Centre for Advanced Materials, Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
Funding
Bundesministerium f?r Bildung und Forschung · Deutsche Forschungsgemeinschaft · State of Lower Saxony
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