Low-temperature nanowelding ultrathin silver nanowire sandwiched between polydopamine-functionalized graphene and conjugated polymer for highly stable and flexible transparent electrodes

Miao, Jinlei; Chen, Sai; Liu, Haihui; Zhang, Xingxiang

doi:10.1016/j.cej.2018.03.144

Cited by 71 publications

(40 citation statements)

References 62 publications

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“…Since graphene was first prepared by Novoselov and Geim using micromechanical exfoliation of graphite [ 2 ], which is also called the ‘Scotch tape’ method [ 3 ], it has been fascinating to many researchers. Owing to its distinct mechanical, electronic, physical and thermal properties, widespread applications of graphene have been explored, such as transparent/flexible electrode [ 4 , 5 ], sensor [ 6 ], energy storage ( Figure 2 ) [ 7 ], composites [ 8 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

et al. 2018

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Graphene, a two-dimensional (2D) carbon nanomaterial, has attracted worldwide attention owing to its fascinating properties. One of critical bottlenecks on some important classes of applications, such as printed electronics, conductive coatings, and composite fillers, is the lack of industrial-scale methods to produce high-quality graphene in the form of liquid suspensions, inks, or dispersions. Since 2008, when liquid-phase exfoliation (LPE) of graphene via sonication was initiated, huge progress has been made in the past decade. This review highlights the latest progress on the successful preparation of graphene in various media, including organic solvents, ionic liquids, water/polymer or surfactant solutions, and some other green dispersants. The techniques of LPE, namely sonication, high-shear mixing, and microfluidization are reviewed subsequently. Moreover, several typical devices of high-shear mixing and exfoliation mechanisms are introduced in detail. Finally, we give perspectives on future research directions for the development of green exfoliation media and efficient techniques for producing high-quality graphene. This systematic exploratory study of LPE will potentially pave the way for the scalable production of graphene, which can be also applied to produce other 2D layered materials, such as BN, MoS2, WS2, etc.

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Section: Introductionmentioning

confidence: 99%

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

et al. 2018

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“…It can be seen that graphene was uniformly tiled on the SLD-AgNW network, and there were no obvious breakages or wrinkles of graphene. The uniform coverage of graphene may lead to the reduction of surface roughness [19]. In order to further quantify the variation of surface roughness, AFM images were captured for the SLD-AgNW films and the SLD-AgNW/G composite films, and the results are shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

“…The welding process creates effective connections between silver nanowires and reduces the relative height of the junctions as well [17]. A series of articles about welding methods for silver nanowires have been written [18,19,20], while capillary welding is a green and self-limiting welding method among them [21]. Furthermore, few research articles are about the direction in which welded silver nanowires combine with graphene.…”

Section: Introductionmentioning

confidence: 99%

High Brightness Organic Light-Emitting Diodes with Capillary-Welded Hybrid Diameter Silver Nanowire/Graphene Layers as Electrodes

Zhang

Wang

et al. 2019

Micromachines

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The development of silver nanowire electrodes is always limited due to some disadvantages, such as roughness, oxidative properties, and other disadvantages. In this research, a capillary-welded silver nanowire/graphene composite film was used as an electrode for organic light-emitting diode (OLED) devices. As an encapsulation layer, graphene reduced the surface roughness and the oxidation probability of silver nanowires. The composite electrode showed an excellent transmittance of 91.5% with low sheet resistant of 26.4 ohm/sq. The devices with the silver nanowire/graphene composite electrode emitted green electroluminescence at 516 nm, and the turn-on voltage was about 3.8 V. The maximum brightness was 50810 cd/cm2, which is higher than the indium tin oxide-based (ITO-based) devices with the same configuration. Finally, it was proved that the silver nanowire/graphene composite electrodes possessed better heat dissipation than the ITO-based ones under energization. In summary, it means that this novel silver nanowires/graphene electrode has great potential in OLED device applications.

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“…These wrinkles would cause the failure of optoelectronics when graphene is used as an electrode alone [22]. Unbelievable, when graphene is transferred to the AgNW network, some of the wrinkles occurred and wrapped around the AgNW tightly, increasing the surface contact area and enhancing adhesion [47]. Therefore, these wrinkles bond the graphene, the AgNW and the substrate together closely, which reduced the roughness of the composite electrode and increased the adhesion of the electrode to the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the two factors of sheet resistance and transmittance mutually restrict each other [47]. The figure of merit (FoM = σ DC σ OP ) was proposed to balance the transmittance and the sheet resistance as equation 4 [48], [49]:…”

Section: Resultsmentioning

confidence: 99%

Pseudo-Biological Highly Performance Transparent Electrodes Based on Capillary Force-Welded Hybrid AgNW Network

Wang

et al. 2019

IEEE Access

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Graphene/silver nanowire composite films have great potential as transparent conductive electrodes in the field of optoelectronic devices. So far, antioxidant and reducing the junction resistance are two major parameters in the silver nanowire electrode studies. In this paper, a pseudo-biological inspired structure for transparent electrodes was proposed by combining hybrid diameters silver nanowire network with the chemical vapor deposition-grown (CVD-grown) graphene as a passivation layer. Compared with the traditional structure, the silver nanowire network with this novel structure of human vascular tissue network greatly reduced the sheet resistance. An environmentally friendly liquid, deionized water, was selected for the generation of capillary forces at the liquid bridge, thereby improving the wire junction problem. After welding with the capillary force, the increase in the value of the figure of merit (FoM = σ DC σ OP) acted a pivotal part in improving conductivity with excellent optical performance. In addition, graphene was chosen as an encapsulation layer to protecting silver nanowires from oxidation while improving electrical properties. Compared with the silver nanowire films with a diameter of 20 nm, the σ DC σ OP of the graphene/silver nanowire composite film increased by 69.6 % with a sheet resistance of 26.4 /sq. More importantly, graphene is supposed to protect silver nanowires from oxidation and moisture, which makes the composite films promising as electrodes for underwater optoelectronic devices or a possible development in high humidity environments. INDEX TERMS Capillary force welding, graphene, hybrid diameters silver nanowire network, pseudo-biological structure.

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Low-temperature nanowelding ultrathin silver nanowire sandwiched between polydopamine-functionalized graphene and conjugated polymer for highly stable and flexible transparent electrodes

Cited by 71 publications

References 62 publications

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

High Brightness Organic Light-Emitting Diodes with Capillary-Welded Hybrid Diameter Silver Nanowire/Graphene Layers as Electrodes

Pseudo-Biological Highly Performance Transparent Electrodes Based on Capillary Force-Welded Hybrid AgNW Network

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