Morphological and Electronic Control of Interfacial Charge Transfer in 2D Transition Metal Dichalcogenide Hybrids

Mack E, Cadranel A, Guldi DM, Harrer E, Zhou X, Wu M, Lourenço LM, Zahn D, Spiecker E, Backes C, Guldi DM (2025)

Publication Language: English

Publication Type: Journal article

Publication year: 2025

Journal

ACS nano American Chemical Society

Book Volume: 19

Pages Range: 28576-28587

Journal Issue: 31

DOI: 10.1021/acsnano.5c07850

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.

Authors with CRIS profile

Elena Mack Graduiertenkolleg 2861/1 - Planare Kohlenstoffgitter Alejandro Cadranel Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Elias Harrer Sonderforschungsbereich 1719: ChemPrint -- Gedruckte Halbleiter der nächsten Generation: Ingenieurskunst auf atomarer Ebene mittels molekularer Oberflächenchemie (ChemPrint) Xin Zhou Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Mingjian Wu Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Dirk Zahn Professur für Theoretische Chemie Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Additional Organisation(s)

Nanoanalysis and Electron Microscopy (CENEM) Computer-Chemie-Centrum (CCC) Molecular Materials (ICMM)

Involved external institutions

University of Aveiro / Universidade de Aveiro PT Portugal (PT) Universität Kassel DE Germany (DE)

How to cite

APA:

Mack, E., Cadranel, A., Guldi, D.M., Harrer, E., Zhou, X., Wu, M.,... Guldi, D.M. (2025). Morphological and Electronic Control of Interfacial Charge Transfer in 2D Transition Metal Dichalcogenide Hybrids. ACS nano, 19(31), 28576-28587. https://doi.org/10.1021/acsnano.5c07850

MLA:

Mack, Elena, et al. "Morphological and Electronic Control of Interfacial Charge Transfer in 2D Transition Metal Dichalcogenide Hybrids." ACS nano 19.31 (2025): 28576-28587.

BibTeX: Download