Femtosecond Transient Absorption Microscopy of Singlet Exciton Motion in Side-Chain Engineered Perylene-Diimide Thin Films
Raj Pandya, Richard Y. S. Chen, Qifei Gu, J.A. Gorman, Florian Auras, Jooyoung Sung, Richard H. Friend, Philipp Kukura, Christoph Schnedermann, Akshay Rao
Abstract
). A comparison between the different films suggests that the exciton transport in the studied materials is intricately linked to their nanoscale morphology, with PDI films that form large crystalline domains exhibiting the largest diffusion coefficients and transport lengths. Our study demonstrates the advantages of directly studying ultrafast transport properties at the nanometer length scale and highlights the need to examine nanoscale morphology when investigating exciton transport in organic as well as inorganic semiconductors.
Topics & Concepts
ExcitonFemtosecondMaterials scienceDiimidePeryleneUltrafast laser spectroscopyPhotoexcitationOrganic semiconductorPicosecondAbsorption (acoustics)Thin filmMicroscopyChemical physicsNanoscopic scaleSemiconductorOptoelectronicsNanostructureMolecular physicsNanotechnologyOpticsChemistryCondensed matter physicsPhysicsAtomic physicsFluorescenceComposite materialExcited stateLaserAdvanced Fluorescence Microscopy TechniquesOrganic Electronics and PhotovoltaicsPhotochemistry and Electron Transfer Studies