Evidence for Anisotropic Electronic Coupling of Charge Transfer States in Weakly Interacting Organic Semiconductor Mixtures
| Autor: | Thomas Zechel, Theresa Linderl, Eduard Meister, Paul Beyer, Valentina Belova, Oleg Konovalov, Alexander Hinderhofer, Marina Gerhard, Alexander Gerlach, Andreas Opitz, Reinhard Scholz, Alexander Generalov, Wolfgang Brütting, Tino Meisel, Ana Sofia Anselmo, Martin Koch, Stefan Schmidt, Marc Uwe Halbich, Frank Schreiber |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Exciton Intermolecular force 02 engineering and technology General Chemistry Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Molecular physics Catalysis 0104 chemical sciences Organic semiconductor Coupling (physics) chemistry.chemical_compound Colloid and Surface Chemistry Diindenoperylene Atomic physics 0210 nano-technology Anisotropy Ground state |
| Zdroj: | Journal of the American Chemical Society. 139:8474-8486 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | We present a comprehensive investigation of the charge-transfer (CT) effect in weakly interacting organic semiconductor mixtures. The donor–acceptor pair diindenoperylene (DIP) and N,N′-bis(2-ethylhexyl)-1,7-dicyanoperylene-3,4/9,10-bis(dicarboxyimide) (PDIR–CN2) has been chosen as a model system. A wide range of experimental methods was used in order to characterize the structural, optical, electronic, and device properties of the intermolecular interactions. By detailed analysis, we demonstrate that the partial CT in this weakly interacting mixture does not have a strong effect on the ground state and does not generate a hybrid orbital. We also find a strong CT transition in light absorption as well as in photo- and electroluminescence. By using different layer sequences and compositions, we are able to distinguish electronic coupling in-plane vs out-of-plane and, thus, characterize the anisotropy of the CT state. Finally, we discuss the impact of CT exciton generation on charge-carrier transport and on... |
| Databáze: | OpenAIRE |
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