Photophysics of Charge Transfer Complexes Formed by Tetracene and Strong Acceptors
- Christoph P. TheurerChristoph P. TheurerInstitut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, GermanyMore by Christoph P. Theurer
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- Ana M. ValenciaAna M. ValenciaCarl von Ossietzky Universität Oldenburg, Institute of Physics, Carl-von-Ossietzky-Straße 9, 26129 Oldenburg, GermanyHumboldt-Universität zu Berlin, Physics Department and IRIS Adlershof, Zum Großen Windkanal 6, 12489 Berlin, GermanyMore by Ana M. Valencia
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- Julian HauschJulian HauschInstitut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, GermanyMore by Julian Hausch
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- Clemens ZeiserClemens ZeiserInstitut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, GermanyMore by Clemens Zeiser
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- Vipilan SivanesanVipilan SivanesanPhysikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, GermanyMore by Vipilan Sivanesan
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- Caterina Cocchi*Caterina Cocchi*E-mail: [email protected]Carl von Ossietzky Universität Oldenburg, Institute of Physics, Carl-von-Ossietzky-Straße 9, 26129 Oldenburg, GermanyHumboldt-Universität zu Berlin, Physics Department and IRIS Adlershof, Zum Großen Windkanal 6, 12489 Berlin, GermanyMore by Caterina Cocchi
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- Petra TegederPetra TegederPhysikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, GermanyCentre for Advanced Materials, Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, GermanyMore by Petra Tegeder
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- Katharina Broch*Katharina Broch*E-mail: [email protected]Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, GermanyMore by Katharina Broch
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.
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