Buchumschlag

Adsorption Structures Affecting the Electronic Properties and Photoinduced Charge Transfer at Perylene-Based Molecular Interfaces

Perylene-based organic semiconductors are widely used in organic electronic devices. Here, we studied the ultrafast excited state dynamics after optical excitation at interfaces between the electron donor (D) diindenoperylene (DIP) and the electron acceptor (A) dicyano-perylene-bis(dicarboximide) (P...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Wirsing, Sara (VerfasserIn) , Hänsel, Marc (VerfasserIn) , Craciunescu, Luca (VerfasserIn) , Rein, Valentina (VerfasserIn) , Schreiber, Frank (VerfasserIn) , Broch, Katharina (VerfasserIn) , Engels, Bernd (VerfasserIn) , Tegeder, Petra (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: September 1, 2023
In: Chemistry
Year: 2023, Jahrgang: 18, Heft: 17
ISSN:1861-471X
DOI:10.1002/asia.202300386
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/asia.202300386
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/asia.202300386
Volltext
Verfasserangaben:Sara Wirsing, Marc Hänsel, Luca Craciunescu, Valentina Belova, Frank Schreiber, Katharina Broch, Bernd Engels, and Petra Tegeder
Beschreibung
Zusammenfassung:Perylene-based organic semiconductors are widely used in organic electronic devices. Here, we studied the ultrafast excited state dynamics after optical excitation at interfaces between the electron donor (D) diindenoperylene (DIP) and the electron acceptor (A) dicyano-perylene-bis(dicarboximide) (PDIR-CN2) using femtosecond time-resolved second harmonic generation (SHG) in combination with large scale quantum chemical calculations. Thereby, we varied in bilayer structures of DIP and PDIR-CN2 the interfacial molecular geometry. For an interfacial configuration which contains a edge-on geometry but also additional face-on domains an optically induced charge transfer (CT) is observed, which leads to a pronounced increase of the SHG signal intensity due to electric field induced second harmonic generation. The interfacial CT state decays within 7.5±0.7 ps, while the creation of hot CT states leads to a faster decay (5.3±0.2 ps). For the bilayer structures with mainly edge-on geometries interfacial CT formation is suppressed since π-π overlap perpendicular to the interface is missing. Our combined experimental and theoretical study provides important insights into D/A charge transfer properties, which is needed for the understanding of the interfacial photophysics of these molecules.
Beschreibung:Online veröffentlicht: 10 July 2023$p1-7$t7
Gesehen am 12.02.2024
Beschreibung:Online Resource
ISSN:1861-471X
DOI:10.1002/asia.202300386

Ähnliche Einträge