Nanoparticle‐Enhanced Silver‐Nanowire Plasmonic Electrodes for High‐Performance Organic Optoelectronic Devices

Abstract

Improved performance in plasmonic organic solar cells (OSCs) and organic light-emitting diodes (OLEDs) via strong plasmon-coupling effects generated by aligned silver nanowire (AgNW) transparent electrodes decorated with core-shell silver-silica nanoparticles (Ag@SiO NPs) is demonstrated. NP-enhanced plasmonic AgNW (Ag@SiO NP-AgNW) electrodes enable substantially enhanced radiative emission and light absorption efficiency due to strong hybridized plasmon coupling between localized surface plasmons (LSPs) and propagating surface plasmon polaritons (SPPs) modes, which leads to improved device performance in organic optoelectronic devices (OODs). The discrete dipole approximation (DDA) calculation of the electric field verifies a strongly enhanced plasmon-coupling effect caused by decorating core-shell Ag@SiO NPs onto the AgNWs. Notably, an electroluminescence efficiency of 25.33 cd A (at 3.2 V) and a power efficiency of 25.14 lm W (3.0 V) in OLEDs, as well as a power conversion efficiency (PCE) value of 9.19% in OSCs are achieved using hybrid Ag@SiO NP-AgNW films. These are the highest values reported to date for optoelectronic devices based on AgNW electrodes. This work provides a new design platform to fabricate high-performance OODs, which can be further explored in various plasmonic and optoelectronic devices.

Surface Plasmonic‐Assisted Photocatalysis and Optoelectronic Devices with Noble Metal Nanocrystals: Design, Synthesis, and Applications

“…These have the capabilities to increase the light‐scattering electric field due to gap plasmon effect. Kim et al have improved the efficiency in OLEDs and plasmonic OSCs via plasmonic transparent electrodes relay on aligned Ag NW networks based on the core–shell Ag@SiO 2 NPs as shown in Figure . They gained an outstanding light efficiency of 25.33 cd A −1 (at 3.2 V), PCE of 9.19%, and power efficiency of 25.14 lm W −1 (3.0 V) in OLEDs.…”

“…b) OSCs using NP‐enhanced plasmonic AgNW electrodes. Reproduced with permission . Copyright 2018, Wiley‐VCH.…”

Toward High Efficiency Organic Light‐Emitting Diodes: Role of Nanoparticles

“…Similar core–shell structures with metallic core and silica shell have also been reported by other groups, such as Ag nanocubes coated with silica shell, [ 37 ] Ag nanoparticles coated with silica shell. [ 104 ]…”

Recent process of plasma effect in organic solar cells

“…Ag NWs networks generally have excellent light scattering and light capturing property as transparent electrodes and metal nanostructures. In order to overcome the disadvantages of short-circuit current or device https://engine.scichina.com/doi/10.1016/j.jechem.2020.04.060 performance deterioration originating from rough surface morphology and NW aggregation, some researchers modified the Ag NW network with core-shell silver-silica nanoparticles (Ag@SiO 2 NPs) as a transparent electrode and successfully obtained a PCE of 9.19% of OSCs [44]. Ag NPs can act as nanoantenna, coupling incident light into the delocalized surface plasmon polaritons (SPPs) on the NW surface as shown in Fig.…”