Electrically driven plasmon mediated energy transfer between ZnO microwires and Au nanoparticles

Abstract

Electrically driven energy transfer between the surface defect states of ZnO quadrilateral microwires (MWs) and localized surface plasmon polaritons has been realized by means of introducing Au nanoparticles (NPs). An electroluminescence device with green emission using ZnO quadrilateral MWs, was fabricated. Once the Au NPs are sputtered on the surfaces of the ZnO MWs, the electroluminescence of the ZnO MWs will shift from green to red. Meanwhile, dual emissions were observed by means of sputtering Au NPs on a single ZnO MW periodically. Due to the Au NPs, electrically driven plasmon mediated energy transfer can achieve the modulation of amplifying, or quenching the surface defect emission. The relevant dynamic process of the surface plasmon mode mediated energy transfer was investigated. This new energy transfer method potentially offers an approach of modification and recombination of the surface defect state excitations of wide bandgap semiconductor materials.

Enhanced Electroluminescence from ZnO Quantum Dot Light‐Emitting Diodes via Introducing Al2O3 Retarding Layer and Ag@ZnO Hybrid Nanodots

“…As is known, LSPs are the collective oscillations of electrons at the interfaces between metal nanoparticles and dielectrics (or semiconductors) excited by incident electromagnetic waves . When the energy of electron–hole pairs/excitons in a light emitter is close to the electron vibrational energy of metal LSPs, the energy could be resonantly coupled into the LSP modes and finally scattered into free space as radiation . The formation of such an additional recombination channel can improve the internal quantum efficiency (IQE) of LEDs.…”

Photoluminescent properties of electrochemically synthetized ZnO nanotubes

“…As can be seen, the PL spectra for the as-grown nanocolumns and nanotubes consist of two overlapping emission bands centred at 583 and 656 nm for as-grown nanocolumns and 591 and 667 for regenerated nanotubes. The emission bands centred at 583 and 591 nm belong to the region known as yellow emission for ZnO [25], while bands centred at 656 and 667 nm are usually labelled as red emission [26].…”

One Pot Synthesis of Au_ZnO Core‐Shell Nanoparticles Using a Zn Complex Acting as ZnO Precursor, Capping and Reducing Agent During the Formation of Au NPs

“…Also the optical properties of core‐shell nanoparticles consisting of ZnO shells grown on Ag and Au nanoparticle cores, by a solution method, have been investigated . Many other reports have highlighted the properties of the Au_ZnO system as tunable photodetector, catalyst and photocatalyst, field‐effect transistor, photoluminescent material, material for water splitting, for third order nonlinear optical properties, as diode for inverse I–V injection, for selective bio‐capture, for CO detection at room temperature, etc …”