Hybrid ITO transparent conductive electrodes embedded with Pt nanoclusters for enhanced output efficiency of GaN-based light-emitting diodes

Gil, Youngun; Kim, Hyunsoo

doi:10.1016/j.tsf.2016.02.041

Cited by 9 publications

(8 citation statements)

References 27 publications

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“…Manufacturing of ITO thin films needs precious raw materials and expensive tools, which limits their compatibility with mass production and low-cost devices [3]. Although alternatives for transparent conductive film are available, such as zinc-doped indium oxide, gallium-doped zinc oxide, and aluminum-doped zinc oxide [4], due to its excellent electrical characteristics and high transparency, ITO is still the best candidate for the organic semiconductor components at present [6][7][8][9][10][11]. However, the natural brittle characteristic of ITO thin film results in damage after mechanical bending, and causes challenges for implementation in flexible organic optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Conductive Characteristics of Indium Tin Oxide Thin Film on Polymeric Substrate under Long-Term Static Deformation

Tran

Lin

2018

Coatings

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The objective of this study is to investigate the effect of long-term static bending on the conductive characteristics of indium tin oxide (ITO) thin film in flexible optoelectronics. Two types of substrate are considered, namely ITO on polyethylene naphthalate (ITO/PEN) and ITO on polyethylene terephthalate (ITO/PET). Electrical properties of the ITO/PEN and ITO/PET sheets are measured in situ under static bending at various radii of curvature. Experimental results indicate that no significant change in electrical resistance of the ITO/PEN and ITO/PET sheets is found for compressive bending after 1000 h at a curvature radius of 10 mm or larger. However, the ITO/PEN and ITO/PET sheets are seriously damaged under a tensile bending of 10 mm radius and 5 mm radius, respectively. The given ITO/PET sheet exhibits a greater resistance to long-term mechanical bending than the ITO/PEN one, which is attributed to the effect of stiffness and thickness of substrate. As the given PET substrate has a lower stiffness and thickness than the PEN one, ITO thin film in the ITO/PET sheet has a smaller stress given a bending radius. Consequently, a smaller extent of change in the electrical conductance of ITO thin film is found in the ITO/PET sheet.

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Section: Introductionmentioning

confidence: 99%

Conductive Characteristics of Indium Tin Oxide Thin Film on Polymeric Substrate under Long-Term Static Deformation

Tran

Lin

2018

Coatings

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“…1–6 Especially, Pt NPs offer high catalytic capacity, conductivity and excellent optical properties and thus been widely applied in various applications. 7–15 For instance, the Pt NPs decorated Si nanowire (SNW)-based solar cells with an improved energy conversion efficiency of 8.1%, substantively higher than SNW without the Pt NPs. 9 Furthermore, the hybrid electrodes fabricated by embedding Pt nanoclusters on GaN produced relatively higher optical transmittance (90%), which resulted in the significantly enhanced output efficiency of GaN-based LEDs.…”

Section: Introductionmentioning

confidence: 99%

“…9 Furthermore, the hybrid electrodes fabricated by embedding Pt nanoclusters on GaN produced relatively higher optical transmittance (90%), which resulted in the significantly enhanced output efficiency of GaN-based LEDs. 10 Likewise, because of the excellent catalytic property, the Pt NPs deposited on wide-bandgap semiconductor have demonstrated outstanding performances in various reactions such as hydrogenation of ethane and oxygen reduction. 11 At the same time, GaN have been applied in various device applications including LEDs, electronics, and catalysis due to the wide bandgap, good electric conductivity, high electron mobility and excellent chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Determination of growth regimes of Pt nanostructures on GaN (0001) based on the control of Pt thickness and annealing time: Morphological evolution of Pt nanostructures from the nanoparticles, nanoclusters to porous network

Pandey

Sui

Kunwar

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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Pt nanostructures are applicable in various applications such as sensors, solar cells, light emitting devices and catalysis and only slight changes in their configuration, density and size can induce significant changes in their properties and thus the functionality in the related applications. In this paper, the systematical evolution of Pt nanostructures such as nanoparticles, nanoclusters and porous network on GaN (0001) is demonstrated by the systematic thermal annealing of Pt thin films based on the combinational effects such as thermal dewetting, Volmer-Weber growth model and coalescence growth. In particular, small dome-shaped self-assembled Pt nanoparticles with relatively smaller deposition amount (<2 nm) and wiggly Pt nanoclusters between 3 and 5 nm are formed based on the Volmer-Weber growth model and the partial coalescence of Pt nanoparticles, respectively. Between 10 and 30 nm, the growth of Pt nanoclusters is observed and eventually with the increased Pt thickness range between 40 and 100 nm, nanoclusters gradually develop into the porous Pt network by connecting neighboring structures owing to the enhanced coalescence growth. Meanwhile, along with the annealing time variation between 0 and 3600 s, the rate of dewetting is increased and as a result, the evolution of densely packed to separated nanoclusters is formed. In addition, the optical properties of corresponding Pt nanostructures demonstrate that the photoluminescence and Raman intensity are reduced along with the evolution of the surface coverage of Pt nanostructures, whereas the average reflectance is significantly enhanced accordingly at the same time.

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“…In these electronic devices, transparent electrodes, which transmit visible light and possess conductivity, are important components. At present, an ITO thin film is the most frequently used as a material for a transparent conductive film [12]- [15]. However, because an ITO thin film contains indium, rare metal, depletion and price rise of the resource have been at issue.…”

Section: Introductionmentioning

confidence: 99%

Characteristics Improvement of PEDOT:PSS Transparent Conductive Film Prepared by Ink-Jet Printing

Nitta¹,

Kawahara²,

Miyata³

2016

AMPC

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Recently, a high-performance and low-priced transparent conductive film has been expected to be developed because flexible devices produced using organic materials have been actively studied. An indium tin oxide (ITO) thin film, which has been generally used as a material for a transparent conductive film, has problems, such as fragility to bending stress and depletion of the resource. The present study used poly(3, 4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS), an organic electroconductive material, and examined the improvement in the resistance value and visible light transmittance of a transparent conductive film produced using the ink-jet method. In previous studies, we reported that, to improve the resistance value and visible light transmittance of a thin film, it was effective to clean the film substrate with ultraviolet/ozone (UV/O3) treatment, anneal the film after it was deposited on the substance, and dip the annealed film into a polar solvent. Focusing on the thin film processing between printing operations, the present study improved resistance value and visible light transmittance by examining both the application methods of a polar solvent and the annealing time between printing operations. As a result, the resistance value and visible light transmittance of a PEDOT:PSS thin film were 390.4 Ω and 86.6%, respectively. This film was obtained by applying a polar solvent and performing annealing for 30 min between printing operations. The printing was performed three times.

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Hybrid ITO transparent conductive electrodes embedded with Pt nanoclusters for enhanced output efficiency of GaN-based light-emitting diodes

Cited by 9 publications

References 27 publications

Conductive Characteristics of Indium Tin Oxide Thin Film on Polymeric Substrate under Long-Term Static Deformation

Conductive Characteristics of Indium Tin Oxide Thin Film on Polymeric Substrate under Long-Term Static Deformation

Determination of growth regimes of Pt nanostructures on GaN (0001) based on the control of Pt thickness and annealing time: Morphological evolution of Pt nanostructures from the nanoparticles, nanoclusters to porous network

Characteristics Improvement of PEDOT:PSS Transparent Conductive Film Prepared by Ink-Jet Printing

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