Silver-Nanowire-Based Localized-Surface-Plasmon-Assisted Transparent Conducting Electrode for High-Efficiency Light-Emitting Diode

Silver nanowire (Ag NWs) networks with high transparency and low resistivity are widely used as promising candidates for the replacement of indium tin oxide (ITO)-based transparent conducting oxides (TCOs) in light-emitting diodes (LEDs). However, LEDs with Ag NW electrodes are less efficient than t...

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Bibliographic Details
Published in:Applied sciences 2021-08, Vol.11 (16), p.7747
Main Authors: Kim, Ja-Yeon, Oh, Gwang-Geun, Kim, Eunjin, Kim, Hyeon-Seung, Hong, Gwangsik, Ryou, Jae-Hyun, Kwon, Min-Ki
Format: Article
Language:English
Subjects:
Contact resistance
Dipoles
Efficiency
Electric contacts
Electrical properties
Electrodes
Gallium nitrides
GaN
Indium
Light emitting diodes
light-emitting diode
Nanoparticles
Nanotechnology
Nanowires
Organic chemicals
Plasmons
Quantum efficiency
Silver
silver nanowire
Spectrum analysis
surface plasmon
Thickness
transparent conducting electrode
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Summary:Silver nanowire (Ag NWs) networks with high transparency and low resistivity are widely used as promising candidates for the replacement of indium tin oxide (ITO)-based transparent conducting oxides (TCOs) in light-emitting diodes (LEDs). However, LEDs with Ag NW electrodes are less efficient than those with ITO electrodes because of their low electrical properties, such as high contact resistance and strong absorption in the visible region. In this work, we tried to improve the efficiency of LEDs with transparent conducting electrodes of Ag NWs networks via localized surface plasmons (LSPs) by adopting silver nanoparticles. We studied the effect of the thickness of the p-GaN layer on surface plasmon coupling. When a 45 nm thick p-GaN layer was used, the internal quantum efficiency was improved by LSP coupling between a dipole of QW and Ag NW/NP, and the light extraction was improved because the NPs afforded a leakage mode and acted as scattering centers.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11167747