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

2021 ◽  
Vol 11 (16) ◽  
pp. 7747
Author(s):  
Ja-Yeon Kim ◽  
Gwang-Geun Oh ◽  
Eunjin Kim ◽  
Hyeon-Seung Kim ◽  
Gwangsik Hong ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Indium Tin Oxide ◽  
High Efficiency ◽  
Internal Quantum Efficiency ◽  
Visible Region ◽  
Silver Nanowire ◽  
Localized Surface Plasmon ◽  
Light Emitting ◽  
Transparent Conducting ◽  
Surface Plasmon Coupling

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.

scholarly journals Tuning the Resonant Frequency of a Surface Plasmon by Double-Metallic Ag/Au Nanoparticles for High-Efficiency Green Light-Emitting Diodes

2019 ◽  
Vol 9 (2) ◽  
pp. 305 ◽  
Author(s):  
Ryoya Mano ◽  
Dong-Pyo Han ◽  
Kengo Yamamoto ◽  
Seiji Ishimoto ◽  
Satoshi Kamiyama ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Green Light ◽  
Resonance Wavelength ◽  
Resonant Wavelength ◽  
Emission Wavelength ◽  
Light Emitting ◽  
Green Leds

Currently, the internal quantum efficiency (IQE) of GaInN-based green light-emitting diodes (LEDs) is still low. To overcome this problem, surface plasmon (SP)-enhanced LEDs have been intensively studied for the last 15 years. For an SP effect in green LEDs, Au and Ag are typically employed as the plasmonic materials. However, the resonance wavelength is determined by their material constants, which are theoretically fixed at ~537 nm for Au and ~437 nm for Ag. In this study, we aimed to tune the SP resonant wavelength using double-metallic nanoparticles (NPs) composed of Au and Ag to match the SP resonance wavelength to the LED emission wavelength to consequently improve the IQE of green LEDs. To form double-metallic NPs, Au/Ag multilayers were deposited on a GaN layer and then thermally annealed. We changed the thicknesses of the multilayers to control the Ag/Au ratio in the NPs. We show that the SP resonant wavelength could be tuned using our approach. We also demonstrate that the enhancement of the IQE in SP-enhanced LEDs was strongly dependent on the SP resonant wavelength. Finally, the highest IQE was achieved by matching the SP resonant wavelength to the LED emission wavelength.

Localized Surface Plasmon Coupled Light-Emitting Diodes With Buried and Surface Ag Nanoparticles

2014 ◽  
Vol 26 (17) ◽  
pp. 1699-1702 ◽  
Author(s):  
Chieh Hsieh ◽  
Yu-Feng Yao ◽  
Chia-Feng Chen ◽  
Pei-Ying Shih ◽  
Chun-Han Lin ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Ag Nanoparticles ◽  
Light Emitting Diodes ◽  
Localized Surface Plasmon ◽  
Light Emitting

Emission Enhancement of Light-Emitting Diode by Localized Surface Plasmon Induced by Ag Inserts in p-GaN and TiO2-Ag Grating

Plasmonics ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 1855-1860 ◽  
Author(s):  
Wenchao Li ◽  
Xiaopeng Sha ◽  
Zhiquan Li ◽  
Xiaoyun Meng ◽  
Erdan Gu
Keyword(s):  
Surface Plasmon ◽  
Light Emitting Diode ◽  
Localized Surface Plasmon ◽  
Light Emitting ◽  
Emission Enhancement

Self assembled silver nanowire mesh as top electrode for organic–inorganic hybrid solar cell

2014 ◽  
Vol 92 (7/8) ◽  
pp. 867-870 ◽  
Author(s):  
Ishwor Khatri ◽  
Qiming Liu ◽  
Ryo Ishikawa ◽  
Keiji Ueno ◽  
Hajime Shirai
Keyword(s):  
Solar Cell ◽  
Indium Tin Oxide ◽  
Optoelectronic Devices ◽  
Hybrid Solar Cell ◽  
Silver Nanowire ◽  
The Self ◽  
Device Performance ◽  
Transparent Conducting ◽  
Self Assembled ◽  
Bubble Template

We prepare transparent, selfassembled polygonal silver nanowire (AgNW) mesh by bubble template and use as top electrode for a poly (3,4ethylenedioxythiophene):poly(stylenesulfonate) (PEDOT:PSS)/n-Si hybrid solar cell. Devices were fabricated by pressing the self-assembled AgNW and ITO electrodes onto the surface of the PEDOT:PSS and device performances were compared. In identical transmittances of ITO and self-assembled AgNW (i.e., 87% transmittance at wavelength of 550 nm), the self-assembled AgNW mesh electrodes shows lower sheet resistance (8 Ω/square) with enhanced transparency in the ultraviolet and infrared regions. As a result, a device performance with an efficiency of 9.60% was obtained with the self-assembled electrode compared to 9.07% efficiency from the indium–tin oxide (ITO) electrode under 100 mW/cm2 of AM 1.5 illumination. This study suggests the potential application of a self-assembled AgNW electrode as the transparent conducting electrode for future optoelectronic devices.

scholarly journals Fabrication of Light Extraction Efficiency of Organic Light-Emitting Diodes with 3D Aspherical Microlens by Using Dry Etching Process

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Y. C. Chen ◽  
C. T. Pan ◽  
C. C. Hsieh ◽  
C. Y. Su ◽  
H. C. Wu ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Indium Tin Oxide ◽  
Extraction Efficiency ◽  
Internal Quantum Efficiency ◽  
Contrast Ratio ◽  
Dry Etching ◽  
Three Dimensions ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Organic Light

organic light-emitting diode (OLED) can enable a greater artificial contrast ratio and viewing angle compared to liquid crystal display (LCD) because OLED pixels directly emit light. There is a shortcoming that the internal quantum efficiency can reach values close to 100%, but about 80% light disperses because of the difference among the refractive indices of the substrate, anode, indium tin oxide (ITO) film, and air. In this paper, three dimensions aspherical microlens arrays (3D A-MLAs) with substrate modifications are developed to simulate the optical luminous field by using FRED software. This study modified parameters of 3D A-MLAs such as the diameter, fill-factor, aspect ratio, dry etching parameters, and electroforming rates of microlens to improve the extraction efficiency of the OLED. In dry etching, not only the aspect ratio with better extraction rate can be obtained by reactive ion etching (RIE) dry etching, but also an undercutting phenomenon can be avoided. The dimensions of 3D A-MLAs can be accurately controlled in the electroforming process used to make a nickel-cobalt (Ni-Co) metal mold to achieve the designed dimensions. According to the measured results, the average luminance efficacy of the OLEDs with 3D A-MLAs can be enhanced.

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