Morphological and Electronic Control of Interfacial Charge Transfer in 2D Transition Metal Dichalcogenide Hybrids
Source abstract
Abstract
Interfacial charge-transfer (ICT) hybrids including transition metal dichalcogenides (TMDs) and phthalocyanines were synthesized and thoroughly characterized. The amount of noncovalently immobilized phthalocyanines per liquid-phase exfoliated (LPE) TMD flake increased exponentially with decreasing flake thickness. Steady-state spectroscopy revealed strong ground-state electronic coupling, evidenced by the emergence of distinct ICT bands. This allowed us to quantify ICT interactions in TMDs using a Mulliken-Hush approach. Also, strong excited-state electronic coupling led to significant quenching of phthalocyanine-centered fluorescence. Ultrafast transient absorption spectroscopy confirmed the formation of charge-separated states with lifetimes on the order of hundreds of picoseconds. These lifetimes remained largely unaffected by the number of TMD layers, underscoring the predominant role of surface-centered ICT interactions. Interestingly, depending on the relative alignment of electronic energy levels at the phthalocyanine/TMD interface, bidirectional charge transfer was also observed.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · 2D Materials and Applications · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Friedrich-Alexander-Universität Erlangen-Nürnberg FAU Profile Center Solar Department of Chemistry and Pharmacy Interdisciplinary Center for Molecular Materials (ICMM), Egerlandstr. 3, 91058 Erlangen, Germany
Friedrich-Alexander-Universität Erlangen-Nürnberg, Computer Chemistry Center, Nägelsbachstraße 25, 91052 Erlangen, Germany
Friedrich-Alexander-Universität Erlangen-Nürnberg, Institute of Micro- and Nanostructure Research (IMN) and Center for Nanoanalysis and Electron Microscopy (CENEM), Cauerstr. 3, 91058 Erlangen, Germany
LAQV-REQUIMTE and Department of Chemistry
University of Aveiro
Kassel University, Physical Chemistry of Nanomaterials, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
Funding
Deutsche Forschungsgemeinschaft · Minist?rio da Ci?ncia, Tecnologia e Ensino Superior · Universidade de Aveiro · Funda??o para a Ci?ncia e a Tecnologia
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