Resonant Energy Transfer Dynamics between Colloidal InP Quantum Dots and Monolayer Molybdenum Disulfide

International Journal of Physics | Vol. 13, No. 2, February 2022 | pp. 9–16

DOI: 10.46882/2022/IJP/000142

Research Article

Title: Resonant Energy Transfer Dynamics between Colloidal InP Quantum Dots and Monolayer Molybdenum Disulfide

Names of Authors: T. H. Nguyen¹, M. G. Richter²

Authors’ Affiliations:
¹ Department of Physics, Vietnam National University, Hanoi, Vietnam
² Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany

Abstract: Hybrid zero-dimensional and two-dimensional semiconductor assemblies provide new pathways for designing light-harvesting architectures, field-effect transistors, and highly sensitive photodetectors. This paper evaluates the non-radiative Förster resonant energy transfer (FRET) dynamics between colloidal indium phosphide (InP) core-shell quantum dots and monolayer molybdenum disulfide (MoS₂). The hybrid thin-film interfaces were prepared via sequential spin-coating routines onto quartz substrates. We carried out steady-state photoluminescence and time-resolved single-photon counting tracks at an operating room temperature of 300 K. The experimental measurements reveal a strong 80.0% quenching of the quantum dot photoluminescence yield when layered onto the MoS₂ sheet. Concurrently, the average exciton lifetime of the InP quantum dots decreased from 5.8 ns down to 1.15 ns. This lifetime shortening yields a calculated FRET efficiency of 80.1% with an energy transfer rate of 0.70 ns⁻¹. The donor-acceptor separation thickness was estimated to be 4.0 nm using the standard Förster model. Spectral overlap maps verify that energy migration is governed by the crossover between quantum dot emission and the MoS₂ exciton absorption profiles, facilitating near-field sensitization.

Keywords: Quantum dots; molybdenum disulfide; resonant energy transfer; fluorescence lifetime; hybrid nanostructures; optoelectronics

Manuscript Timeline: Received: November 02, 2021; Revised: December 18, 2021; Accepted: January 11, 2022; Published: February 15, 2022

Citation: Nguyen, T. H., & Richter, M. G. (2022). Resonant Energy Transfer Dynamics between Colloidal InP Quantum Dots and Monolayer Molybdenum Disulfide. International Journal of Physics, 13(2), 9–16.

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