Characteristics of ITO films deposited on a PET substrate under various deposition conditions

Lee, Jung Rak; Lee, Dong Yeop; Kim, Do Geun; Lee, Gun Hwan; Kim, Jae Won; Song, Pung Keun

doi:10.3365/met.mat.2008.12.745

Cited by 23 publications

(8 citation statements)

References 12 publications

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“…It is important to note that the nanocomposites with low HDI-GO content display R s values close to those reported for ITO films coated onto plastic substrates, such as polyethylene terephthalate (PET) [46], hence, they are well suited to use as transparent conductive electrodes in conventional panel displays, solar cells, touch panels, and so forth. Further, R s values obtained herein for HDI-GO concentrations in the range of 0.5–5 wt % are lower than those reported for solution processed PEDTO:PSS/rGO films (2 × 10 2 –2 × 10 3 Ω/sq) [47,48] or PEDOT:PSS/CNT films (≥500 Ω/sq) [40], which showed higher sheet resistance than the neat polymer, attributed to the poor nanocomposite quality due to non-homogenous dispersion of the CNTs or the r-GO sheets within the conducting PEDOT:PSS matrix.…”

Section: Resultssupporting

confidence: 56%

High-Performance PEDOT:PSS/Hexamethylene Diisocyanate-Functionalized Graphene Oxide Nanocomposites: Preparation and Properties

2018

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Graphene oxide (GO) has emerged as an ideal filler to reinforce polymeric matrices owing to its large specific surface area, transparency, flexibility, and very high mechanical strength. Nonetheless, functionalization is required to improve its solubility in common solvents and expand its practical uses. In this work, hexamethylene diisocyanate (HDI)-functionalized GO (HDI-GO) has been used as filler of a conductive polymer matrix, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The nanocomposites have been prepared via a simple solution casting method, and have been characterized by scanning electron microscopy (SEM), UV–Vis and Raman spectroscopies, X-ray diffraction (XRD), thermogravimetric analysis (TGA), tensile tests, and four-point probe measurements to get information about how the HDI-GO functionalization degree (FD) and the HDI-GO concentration in the nanocomposite influence the final properties. SEM analysis showed a very homogenous dispersion of the HDI-GO nanosheets with the highest FD within the matrix, and the Raman spectra revealed the existence of very strong HDI-GO-PEDOT:PSS interactions. A gradual improvement in thermal stability was found with increasing HDI-GO concentration, with only a small loss in transparency. A reduction in the sheet resistance of PEDOT:PSS was found at low HDI-GO contents, whilst increasing moderately at the highest loading tested. The nanocomposites showed a good combination of stiffness, strength, ductility, and toughness. The optimum balance of properties was attained for samples incorporating 2 and 5 wt % HDI-GO with the highest FD. These solution-processed nanocomposites show considerably improved performance compared to conventional PEDOT:PSS nanocomposites filled with raw GO, and are highly suitable for applications in various fields, including flexible electronics, thermoelectric devices, and solar energy applications.

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Section: Resultssupporting

confidence: 56%

High-Performance PEDOT:PSS/Hexamethylene Diisocyanate-Functionalized Graphene Oxide Nanocomposites: Preparation and Properties

2018

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“…This can be rationalized considering that HDI-GO 6, with a higher FD, is more homogeneously dispersed within the matrix, and interacts more strongly with the PANI chains, thus favoring the formation of a more interpenetrated network, and consequently conductive paths, hence lower sheet resistance. It is interesting to note that the nanocomposites with high HDI-GO content exhibit R s values close to those reported for ITO films coated onto plastic substrates, such as polyethylene terephthalate (PET) [46], hence, they are good candidates to be used as transparent conductive electrodes in conventional panel displays, solar cells, touch panels, and so forth.…”

Section: Resultssupporting

confidence: 55%

The Effect of Hexamethylene Diisocyanate-Modified Graphene Oxide as a Nanofiller Material on the Properties of Conductive Polyaniline

et al. 2019

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Conducting polymers like polyaniline (PANI) have gained a lot of interest due to their outstanding electrical and optoelectronic properties combined with their low cost and easy synthesis. To further exploit the performance of PANI, carbon-based nanomaterials like graphene, graphene oxide (GO) and their derivatives can be incorporated in a PANI matrix. In this study, hexamethylene diisocyanate-modified GO (HDI-GO) nanosheets with two different functionalization degrees have been used as nanofillers to develop high-performance PANI/HDI-GO nanocomposites via in situ polymerization of aniline in the presence of HDI-GO followed by ultrasonication and solution casting. The influence of the HDI-GO concentration and functionalization degree on the nanocomposite properties has been examined by scanning electron microscopy (SEM), Raman spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), tensile tests, zeta potential and four-point probe measurements. SEM analysis demonstrated a homogenous dispersion of the HDI-GO nanosheets that were coated by the matrix particles during the in situ polymerization. Raman spectra revealed the existence of very strong PANI-HDI-GO interactions via π-π stacking, H-bonding, and hydrophobic and electrostatic charge-transfer complexes. A steady enhancement in thermal stability and electrical conductivity was found with increasing nanofiller concentration, the improvements being higher with increasing HDI-GO functionalization level. The nanocomposites showed a very good combination of rigidity, strength, ductility and toughness, and the best equilibrium of properties was attained at 5 wt % HDI-GO. The method developed herein opens up a versatile route to prepare multifunctional graphene-based nanocomposites with conductive polymers for a broad range of applications including flexible electronics and organic solar cells.

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“…Also, we previously reported that the properties of ITO films are determined directly by the sputtering power, total gas pressure, and distance between the target and substrate. 3) In this study, therefore, as an extension to our previous work, we report the effect of the substrate temperature on the properties of ITO films deposited on poly(ethylene terephthalate) (PET) substrates.…”

Section: Introductionmentioning

confidence: 91%

“…It is considered that the surface migration of the sputtered atoms was associated with the adhesion strength of the films, which strongly affects their mechanical properties. 3,7) The difference in the adhesion strength between the unheated and heated ITO films can be evaluated by the scratch test.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Indium-tin-oxide (ITO) films, a representative transparent conducting oxide (TCO), are generally used as transparent electrodes for various applications, such as flat panel displays (FPDs), flexible displays and solar cells, due to their low resistivity and high transmittance in the visible light region. [1][2][3][4] Generally, it is well known that the optical, electrical and mechanical properties, microstructure, and surface morphology of ITO films are very important factors for various applications. 2) It was reported that these properties of ITO films are closely related to the processing method and deposition conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Substrate Temperature on Properties of Indium–Tin-Oxide Films Deposited on Poly(ethylene terephthalate) Substrate by DC Magnetron Sputtering

Lee¹,

Lee

Song³

2009

jjap

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Indium-tin-oxide (ITO) films were successfully deposited on poly(ethylene terephthalate) (PET) substrates at various temperatures by DC magnetron sputtering. The influence of the substrate temperature on the electrical, structural, mechanical and optical properties and surface morphology was investigated. The optimum electrical, optical and mechanical properties were obtained for the films deposited at a substrate temperature of 70 C, which was attributed to the enhancement of the surface migration of the sputtered atoms arriving at the substrate surface. On the other hand, the average roughness was increased due to the structural change from amorphous to polycrystalline. However, the electrical and mechanical properties of the films were degraded at temperatures higher than 70 C. This result could be due to the thermal damage incurred by the PET substrate during the sputtering process.

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Characteristics of ITO films deposited on a PET substrate under various deposition conditions

Cited by 23 publications

References 12 publications

High-Performance PEDOT:PSS/Hexamethylene Diisocyanate-Functionalized Graphene Oxide Nanocomposites: Preparation and Properties

High-Performance PEDOT:PSS/Hexamethylene Diisocyanate-Functionalized Graphene Oxide Nanocomposites: Preparation and Properties

The Effect of Hexamethylene Diisocyanate-Modified Graphene Oxide as a Nanofiller Material on the Properties of Conductive Polyaniline

Effect of Substrate Temperature on Properties of Indium–Tin-Oxide Films Deposited on Poly(ethylene terephthalate) Substrate by DC Magnetron Sputtering

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