Gap surface plasmon-enhanced photoluminescence from upconversion nanoparticle-sensitized perovskite quantum dots in a metal-insulator-metal configuration under NIR excitation
Journal
Journal of Materials Chemistry C
Journal Volume
10
Journal Issue
2
Pages
532-541
Date Issued
2022
Author(s)
Abstract
Very high luminescence enhancement of perovskite quantum dots (PeQDs) is achieved under near-infrared excitation through sensitization by upconversion nanoparticles (UCNPs) and localized surface plasmon (LSP) coupling. To overcome the low quantum yield of UCNPs, the plasmonic effect is exploited through a metal-insulator-metal (MIM) configuration. Here, Au nanorods (AuNRs) on a UCNPs/PeQDs (UP) layer supported by a Ag film (AuNRs-UCNPs/PeQDs-Ag film, or MUPM) configuration using UCNPs and PeQDs of similar sizes as the insulator layer is reported for the first time. Despite the thin thickness of the UP layer, we observed strong green emission from the PeQDs under 980 nm excitation, indicating high energy transfer efficiency. Furthermore, by capping AuNRs with amphiphilic diblock copolymers, photoluminescence quenching is suppressed. An overall 29-fold upconversion enhancement is achieved for the green emission in the MUPM compared with a UCNPs/PeQDs-glass owing to the strongly localized electric field from gap surface plasmons and the coupling of the longitudinal LSP resonance band of AuNRs with the excitation of UCNPs. This study provides a novel pathway to prepare a highly efficient and effective emissive device based on MIM configurations using UCNPs and PeQDs, which can be expanded to serve as a generalized platform in a wide range of optoelectronic applications. ? 2022 The Royal Society of Chemistry.
Subjects
Electric excitation
Electric fields
Energy transfer
Excited states
Infrared devices
Metal insulator boundaries
Metal nanoparticles
Metals
MIM devices
Nanocrystals
Nanorods
Photoluminescence
Semiconductor insulator boundaries
Semiconductor quantum dots
Ag films
Au nano rods
Gap surface plasmons
Green emissions
Localized surface plasmon
Luminescence enhancements
Near-infrared excitation
NIR excitation
Sensitisation
Upconversion nanoparticles
Perovskite
SDGs
Type
journal article