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DOI: 10.5445/IR/1000086793
Veröffentlicht am 22.10.2018

Anisotropic energy transfer in crystalline chromophore assemblies

Haldar, Ritesh; Jakoby, Marius; Mazel, Antoine; Zhang, Qiang; Welle, Alexander; Mohamed, Tawheed; Krolla, Peter; Wenzel, Wolfgang; Diring, Stéphane; Odobel, Fabrice; Richards, Bryce S.; Howard, Ian A.; Wöll, Christof

Abstract:
An ideal material for photon harvesting must allow control of the exciton diffusion length and directionality. This is necessary in order to guide excitons to a reaction center, where their energy can drive a desired process. To reach this goal both of the following are required; short- and long-range structural order in the material and a detailed understanding of the excitonic transport. Here we present a strategy to realize crystalline chromophore assemblies with bespoke architecture. We demonstrate this approach by assembling anthracene dibenzoic acid chromophore into a highly anisotropic, crystalline structure using a layer-by-layer process. We observe two different types of photoexcited states; one monomer-related, the other excimer-related. By incorporating energy-accepting chromophores in this crystalline assembly at different positions, we demonstrate the highly anisotropic motion of the excimer-related state along the [010] direction of the chromophore assembly. In contrast, this anisotropic effect is inefficient for the monomer-related excited state.


Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2041-1723
URN: urn:nbn:de:swb:90-867938
KITopen ID: 1000086793
HGF-Programm 43.22.01; LK 01
Erschienen in Nature Communications
Band 9
Heft 1
Seiten Article: 4332
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 18.10.2018
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