Temperature and voltage dependent current–voltage behavior of single-walled carbon nanotube transparent conducting films

Zhang, Zechen; Wang, Tao; Wang, Yan; Yang, Hai-Jie; Da, Shi-Xun; Ding, Er‐Xiong; Liu, Juncheng; Pei, Yu; Fu, Yun-Qiao; Li, Xu; Pan, Huaizhong

doi:10.1016/j.apsusc.2015.08.023

Cited by 10 publications

(6 citation statements)

References 31 publications

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“…First, the removal of SDBS may explain this, as SDBS is a dispersant, that is, a non-conductive substance. H + provided by nitric acid is combined with sulfonic acid group in SDBS, which increases the hydrophilicity of SDBS, so most of the remaining SDBS can be washed away 40 , 45 , 46 . Second, it may be due to the removal of the by-product, SnO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The integrity of the films is well-maintained throughout the process, and it is suitable for flexible substrate and industrial large-scale operations. Nitric acid, a strong acid, can effectively remove the by-products from the reduction process and the dispersant needed for the dispersion of carbon nanotubes 40 , 45 , 46 . In addition, nitric acid also has N-doping effect on the rGO 42 – 44 .…”

Section: Introductionmentioning

confidence: 99%

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Bilayer and three dimensional conductive network composed by SnCl2 reduced rGO with CNTs and GO applied in transparent conductive films

Tian

Guo

Wang

et al. 2021

Sci Rep

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Graphene oxide (GO), reduced graphene oxide (rGO) and carbon nanotubes (CNTs) have their own advantages in electrical, optical, thermal and mechanical properties. An effective combination of these materials is ideal for preparing transparent conductive films to replace the traditional indium tin oxide films. At present, the preparation conditions of rGO are usually harsh and some of them have toxic effects. In this paper, an SnCl2/ethanol solution was selected as the reductant because it requires mild reaction conditions and no harmful products are produced. The whole process of rGO preparation was convenient, fast and environmentally friendly. Then, SEM, XPS, Raman, and XRD were used to verify the high reduction efficiency. CNTs were introduced to improve the film conductive property. The transmittance and sheet resistance were the criteria used to choose the reduction time and the content ratios of GO/CNT. Thanks to the post-treatment of nitric acid, not only the by-product (SnO2) and dispersant in the film are removed, but also the doping effect occurs, which are all conducive to reducing the sheet resistances of films. Ultimately, by combining rGO, GO and CNTs, transparent conductive films with a bilayer and three-dimensional structure were prepared, and they exhibited high transmittance and low sheet resistance (58.8 Ω/sq. at 83.45 T%, 47.5 Ω/sq. at 79.07 T%), with corresponding $${{\sigma_{dc} } \mathord{\left/ {\vphantom {{\sigma_{dc} } {\sigma_{opt} }}} \right. \kern-\nulldelimiterspace} {\sigma_{opt} }}$$ σ dc / σ opt values of 33.8 and 31.8, respectively. In addition, GO and rGO can modify the surface and reduce the film surface roughness. The transparent conductive films are expected to be used in photoelectric devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bilayer and three dimensional conductive network composed by SnCl2 reduced rGO with CNTs and GO applied in transparent conductive films

Tian

Guo

Wang

et al. 2021

Sci Rep

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“…Scientists are trying to replace ITO with alternate materials to reduce the cost of OLED devices. A range of materials have been investigated, including carbon nanotubes (CNTs) [6][7][8][9][10][11], graphene [12,13], graphene oxide (GO) [14][15][16], metallic silver nanowires (AgNWs) [17][18][19], polymeric materials [20][21][22][23][24], and mixtures of these materials [25][26][27][28]. Amongst the alternatives, polymeric materials and CNTs have been selected together, and one prepares TCFs by wet fabrication processes that prepare TCFs quickly with slight fluctuation in sheet resistance and are more suitable for large-scale industrial production conditions.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

et al. 2021

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Improved OLED systems have great potential for next-generation display applications. Carbon nanotubes (CNTs) and the conductive polymers poly (3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS) have attracted great interest for advanced applications, such as optoelectronic products. In this paper, the simultaneous enhancement of the conductivity, roughness, and adhesion properties of transparent conductive films with PEDOT: PSS/CNTs is reported. These films prepared by a simple spin-coating process were successfully used to produce high-performance organic light-emitting diodes (OLEDs) with an improved lifetime. Addition of PEDOT: PSS lowered the film sheet resistance and CNTs helped to enhance the stability and maintain the lifetime of the OLEDs. In addition, treatment with methanol and nitric acid changed the morphology of the polymer film, which led to greatly reduced sheet resistance, enhanced substrate adhesion, and reduced film roughness. The best performance of the film (PEDOT: PSS: CNT = 110: 1, W/W) was 100.34 Ω/sq.@ 90.1 T%. High transmittance, low sheet resistance, excellent adhesion, and low roughness (3.11 nm) were achieved synchronously. The fabricated OLED demonstrated a low minimum operating voltage (3 V) and could endure high voltage (20 V), at which its luminance reached 2973 cd/m2. Thus, the incorporation of CNTs within PEDOT: PSS electrodes has great potential for the improvement of the performance of OLED devices.

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“…This multifaceted seamless one-dimensional roll of a single layer of graphite (graphene) has revealed highly promising applications in future molecular electronics [10,11] over the last few decades. The remarkable electronic properties of these 1-D structures make them suitable for various applications in nanotechnology, optics, electronics, and other fields of materials science as chemical sensors [12][13][14][15][16][17][18][19] , actuators [20] , nano biomaterial [21,22] , conductive heating film [23,24] , conductive transparent electrode [25,26] , conductive nanoink [27] , nano device [28][29][30][31][32] , and display (backlight, flat lamp and field emitter) [32,33] etc. This has invoked interest in the experimentalists as well as theoreticians.…”

Section: Introductionmentioning

confidence: 99%

A theoretical study of (9, 0) Singlewalled Carbon Nanotubes using quantum mechanical techniques

Sharma¹,

Jaggi²

2021

CAN

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First principles simulation studies using the density functional theory have been performed on (9, 0) Zigzag Singlewalled Carbon Nanotube (SWCNT) to investigate its electronic, optical and thermodynamic properties using CASTEP (Cambridge Sequential Total Energy Package) and DFTB (Density Functional based Tight Binding) modules of the Material Studio Software version 7.0. Various functionals and sub-functionals available in the CASTEP Module (using Pulay Density Mixing treatment of electrons) and various eigen-solvers and smearing schemes available in the DFTB module (using smart algorithm) have been tried out to chalk out the electronic structure. The analytically deduced values of the band gap obtained were compared with the experimentally determined value reported in the literature. By comparison, combination of Anderson smearing scheme and standard diaogonalizer produced best results in DFTB module while in the CASTEP module, GGA (General Gradient approximation) functional with RPBE (Revised-perdew-Burke-Ernzerh) as Sub-functional was found to be the most consistent. These optimized parameters were then used to determine various electronic, optical and thermodynamic properties of (9, 0) Singlewalled Nanotube. (9, 0) Singlewalled Nanotube, which is extensively being used for sensing NH3, CH4 & NO2, has been picked up in particular as it is reported to exhibit a finite energy band gap in contrast to its expected metallic nature. The study is of utmost significance as it not only probes and validates the simulation route for predicting suitable properties of nanomaterials but also throws light on the comparative efficacy of the different approximation and rationalization quantum mechanical techniques used in simulation studies.

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Temperature and voltage dependent current–voltage behavior of single-walled carbon nanotube transparent conducting films

Cited by 10 publications

References 31 publications

Bilayer and three dimensional conductive network composed by SnCl2 reduced rGO with CNTs and GO applied in transparent conductive films

Bilayer and three dimensional conductive network composed by SnCl2 reduced rGO with CNTs and GO applied in transparent conductive films

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

A theoretical study of (9, 0) Singlewalled Carbon Nanotubes using quantum mechanical techniques

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