International Journal of Physics | Vol. 15, No. 1, January 2024 | pp. 1–8
DOI: 10.46882/2024/IJP/000165
Research Article
Title: Resonant Energy Transfer Kinetic Profiles between Quantum Dots and Graphene Monolayers
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 low-dimensional semiconductor frameworks combine zero-dimensional and two-dimensional characteristics to enable advanced light-harvesting systems, nanoscale optical pathways, and highly adaptive optoelectronic switches. This paper evaluates non-radiative Förster resonant energy transfer (FRET) dynamics between colloidal cadmium selenide (CdSe) quantum dots and pristine chemical vapor deposition graphene monolayers. The hybrid interfaces were fabricated via sequential layer deposition routines onto high-purity quartz substrates. We performed steady-state photoluminescence and time-resolved single-photon counting tracks at an operating temperature of 300 K. The experimental measurements reveal a profound 84.0% quenching of the quantum dot photoluminescence emission when phase-coupled to the graphene sheets. Concurrently, the average fluorescence lifetime of the CdSe quantum dots decreased from 5.2 ns down to 0.83 ns. This lifetime shortening yields a calculated FRET efficiency of 84.0% with a corresponding energy migration rate of 1.01 ns⁻¹. The donor-acceptor boundary separation distance was determined to be 3.6 nm using the standard mathematical equations of the Förster model. These rapid near-field energy dynamics provide core physical data for designing hyper-sensitive thin-film photodetectors.
Keywords: Quantum dots; graphene; resonant energy transfer; fluorescence lifetime; hybrid nanostructures; optoelectronics
Manuscript Timeline: Received: October 12, 2023; Revised: November 24, 2023; Accepted: December 15, 2023; Published: January 15, 2024
Citation: Nguyen, T. H., & Richter, M. G. (2024). Resonant Energy Transfer Kinetic Profiles between Quantum Dots and Graphene Monolayers. International Journal of Physics, 15(1), 1–8.
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