Hybrid film of single-layer graphene and carbon nanotube as transparent conductive electrode for organic light emitting diode

Kumar, Pradeep; Woon, Kai Lin; Wong, WH; Saheed, Mohamed Shuaib Mohamed; Burhanudin, Zainal Arif

doi:10.1016/j.synthmet.2019.116186

Cited by 23 publications

(21 citation statements)

References 41 publications

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“…In the sensor's architecture, sensing material plays a very crucial role in responding to the gas molecules. As a sensing material, several pristine and composite materials such as zinc oxide (ZnO) [5], tin oxide (SnO2) [6], titanium dioxide (TiO2) [7], polyaniline (PANI) [8], carbon nanotubes (CNTs) [9], graphene [10] and ZnO-CuO [11] have been widely investigated. Among these sensing materials, graphene has attracted the research community due to its unique properties at room temperature for instance, large surface area (2630 m 2 g −1 ) for molecular adsorption, outstanding thermal (~5000 W.m -1 .k -1 ) and electrical conductivity (up to 6000 S.cm -1 ) and high carrier mobility of 1.5 × 10 5 cm 2 /Vs [12].…”

Section: Introductionmentioning

confidence: 99%

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Gupta

Athirah

Hawari

2020

IJEECS

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<span>Volatile organic compounds (VOCs) affect our daily life through their emission from very common sources such as plants, building materials, paints, pesticides, and fossil fuel burning. The detection of VOCs at room temperature is a prime requirement. The graphene-based gas sensor has the potential to detect these VOC gases due to its attractive features such as high mobility and large surface area. In this work, a graphene-derivative is prepared as a sensing material in order to detect acetone. The thin film of graphene-derivative is prepared by a drop-cast method on a quartz crystal microbalance (QCM) sensor followed by drying in the room environment conditions. The prepared graphene-derivative and thin films are characterized structurally and morphologically by standard microscopic techniques such as FESEM, EDX, and Raman spectroscopy. The electrical parameters such as mobility and resistivity are measured using Hall-effect measurements at room temperature. The response and recovery time of the graphene-derivative based 10 MHz QCM sensor are found to be 23 s and 20 s, respectively. This highly sensitive graphene-based gas sensor with good reversibility can be employed for human health and environment safety applications. </span>

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Section: Introductionmentioning

confidence: 99%

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Gupta

Athirah

Hawari

2020

IJEECS

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“…ITO-based electrodes are too stiff for the development of flexible OLEDs [ 25 ]. The graphene is also considered an alternative material to ITO due to excellent electrical conductively, transparency, and chemical and thermal stability [ 26 ]. Graphene and doped graphene, such as transparent electrode [ 27 ], with nanowire [ 28 ], CNTs, and SWCNTs [ 29 ], have also been studied with improved LEDs performance in term of current spreading enhancement [ 30 ] and ohmic contact formation with reduced growth temperature [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

A Review on Graphene-Based Light Emitting Functional Devices

et al. 2020

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In recent years, the field of nanophotonics has progressively developed. However, constant demand for the development of new light source still exists at the nanometric scale. Light emissions from graphene-based active materials can provide a leading platform for the development of two dimensional (2-D), flexible, thin, and robust light-emitting sources. The exceptional structure of Dirac’s electrons in graphene, massless fermions, and the linear dispersion relationship with ultra-wideband plasmon and tunable surface polarities allows numerous applications in optoelectronics and plasmonics. In this article, we present a comprehensive review of recent developments in graphene-based light-emitting devices. Light emissions from graphene-based devices have been evaluated with different aspects, such as thermal emission, electroluminescence, and plasmons assisted emission. Theoretical investigations, along with experimental demonstration in the development of graphene-based light-emitting devices, have also been reviewed and discussed. Moreover, the graphene-based light-emitting devices are also addressed from the perspective of future applications, such as optical modulators, optical interconnects, and optical sensing. Finally, this review provides a comprehensive discussion on current technological issues and challenges related to the potential applications of emerging graphene-based light-emitting devices.

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“…Owing to its very high volume–exposure ratio, a small amount of the graphene-based material enriched with the high surface area can provide ample active sites for high adsorption of the analyte gas molecules [ 23 , 24 ]. The derivative of graphene—reduced graphene oxide (rGO)—has also attracted much research attention in various application including catalysts [ 25 ], bio/gas sensors [ 26 , 27 ], electronic devices, and transparent electrodes [ 28 ], due to its facile implementation and outstanding properties such as hydrophilic nature, low-cost production, tunable optical band gap, and large surface area with high catalytic reactivity.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Reduced Graphene Oxide Thin Films for Ultrahigh CO2 Gas Sensing Performance at Room Temperature

et al. 2021

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The demand for carbon dioxide (CO2) gas detection is increasing nowadays. However, its fast detection at room temperature (RT) is a major challenge. Graphene is found to be the most promising sensing material for RT detection, owing to its high surface area and electrical conductivity. In this work, we report a highly edge functionalized chemically synthesized reduced graphene oxide (rGO) thin films to achieve fast sensing response for CO2 gas at room temperature. The high amount of edge functional groups is prominent for the sorption of CO2 molecules. Initially, rGO is synthesized by reduction of GO using ascorbic acid (AA) as a reducing agent. Three different concentrations of rGO are prepared using three AA concentrations (25, 50, and 100 mg) to optimize the material properties such as functional groups and conductivity. Thin films of three different AA reduced rGO suspensions (AArGO25, AArGO50, AArGO100) are developed and later analyzed using standard FTIR, XRD, Raman, XPS, TEM, SEM, and four-point probe measurement techniques. We find that the highest edge functionality is achieved by the AArGO25 sample with a conductivity of ~1389 S/cm. The functionalized AArGO25 gas sensor shows recordable high sensing properties (response and recovery time) with good repeatability for CO2 at room temperature at 500 ppm and 50 ppm. Short response and recovery time of ~26 s and ~10 s, respectively, are achieved for 500 ppm CO2 gas with the sensitivity of ~50 Hz/µg. We believe that a highly functionalized AArGO CO2 gas sensor could be applicable for enhanced oil recovery, industrial and domestic safety applications.

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Hybrid film of single-layer graphene and carbon nanotube as transparent conductive electrode for organic light emitting diode

Cited by 23 publications

References 41 publications

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

A Review on Graphene-Based Light Emitting Functional Devices

Functionalized Reduced Graphene Oxide Thin Films for Ultrahigh CO2 Gas Sensing Performance at Room Temperature

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