Tailoring light emission properties of organic emitter by coupling to resonance-tuned silver nanoantenna arrays

Abstract

A convenient nanotechnique is reported to tailor the light emission properties of organic emitter poly͓2-methoxy-5-͑2Ј-ethyl-hexyloxy͒-p-phenylene vinylene͔ ͑MEH-PPV͒ by coupling to resonance-tuned silver nanoantenna arrays. It is revealed experimentally and theoretically that the enhanced photoluminescence from the MEH-PPV/silver nanoantenna complex may originate from the energy transfer effect in the surface plasmon resonance coupling between the MEH-PPV and silver nanocaps and from local electromagnetic field enhancement of nanogaps between the silver nanocaps in the background of the light-emitting MEH-PPV. The results are corroborated by the finite difference time domain simulation results.

Light-emitting diodes enhanced by localized surface plasmon resonance

“…Frequently used templates are often produced from porous anodic alumina [PAA] or by lithography techniques [41,63,64]. The advantage of this method is avoidance of chemical peel-off, thus making incorporation of metallic NPs into EL LEDs possible.…”

Fabrication of Si–Ag “wire-cap” nanostructures for metal-enhanced fluorescence

“…Experiments have confirmed the importance of overlapping between the localized surface plasmon resonance energy of the surface configuration and emission energy [1,6,7]. The type, shape, height, and density of the surface nanostructures determine the degree of enhancement [8].…”

“…To confirm, we try another method to remove the silver particles by HNO 3 and the outcome is almost the same as shown in (d). In fact, it has been demonstrated in our previous work that the PL efficiency of the MEH-PPV coupled silver nanostructures may originate from the energy transfer effect in the surface plasmon resonance coupling [7]. The plasmon resonance energy transfer process can occur through the dipole-dipole interaction between the resonating plasmon dipole in Ag caps and the MEH-PPV dipole.…”

Band-gap-dependent emissions from conjugated polymers coupled silver nanocap array

“…8 The enhanced emission properties have been observed in many hybrids of the conjugated polymers/metal nanostructures, which are caused by scattering or plasmon resonance energy transfer. [9][10][11] The surface-plasmon (SP) enhanced energy transfer has been applied to improve the organic LEDs if the SP-excitation wavelength is close to both the donor emission and the acceptor absorption peaks. 12 If the SP energy of a nanoscale metal matches the emitted photon energy of an organic emitter, the resonance coupling can lead to the energy transfer from the organic emitter to the nanoscale metal surface to result in the quenching of the emission from the organic emitter.…”

“…It has been found that the PL enhancement of an organic emitter is optimum in the hybrid prepared under this process condition. 9 In the paper, we selected two types of the conjugated polymers with different band gaps as the research objects. Regioregular poly [3-(2,5,8-trioxanonyl) thiophene] (P3TT) and poly(2,5-dioctyloxy-p-phenylene) (PPP) were prepared via Grignard metathesis (GRIM) polymerization.…”