Issue 36, 2023

A plasmonic hetero-structure using charge transfer effect improved LSPR for enhanced up-conversion luminescence

Abstract

Local surface plasmon resonance (LSPR) offers exciting prospects for optical signal amplification. In this study, we designed a composite hetero-structure of Au and defective MoS2 (Au/D-MoS2) for a charge transfer type LSPR modulator. D-MoS2 produces strong defect plasma absorption in the visible and near-infrared optical regions and injects a large number of its generated electrons into the composite Au nanoparticles via surface charge transfer under near-infrared laser excitation, enabling strong plasmon resonance in the Au nanoparticles. As a result, the NaYF4:Yb–Er nanoparticles are effectively modulated in their luminescence intensity by the dual coupling enhancement effect of the MoS2 nanoparticles plasmon resonant excitation field and the Au nanoparticles plasmon resonant emission field under near-infrared excitation. Due to the strong LSPR induced electric field, a maximum enhancement factor of 15-fold in the luminescence intensity is achieved. This intelligent approach enables efficient modulation of NaYF4:Yb–Er in terms of both excitation and emission field enhancement, opening a new avenue to enhance the intensity of up-conversion luminescence.

Graphical abstract: A plasmonic hetero-structure using charge transfer effect improved LSPR for enhanced up-conversion luminescence

  • This article is part of the themed collection: #MyFirstJMCC

Supplementary files

Article information

Article type
Paper
Submitted
15 6 2023
Accepted
20 8 2023
First published
21 8 2023

J. Mater. Chem. C, 2023,11, 12337-12347

A plasmonic hetero-structure using charge transfer effect improved LSPR for enhanced up-conversion luminescence

J. Xu, Y. Zhang, J. Yan, Y. Wu, Y. Xu, Y. Liao, Y. Yang, D. Zhou, Q. Wang and J. Qiu, J. Mater. Chem. C, 2023, 11, 12337 DOI: 10.1039/D3TC02081A

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