Highly reliable MoOx/Ag NW bilayer transparent conductive thin films fabricated by all solution process and transparent heater application

Song, Lijun; Qu, Shiru; Ma, Lijing; Yu, Shihui

doi:10.1016/j.optmat.2023.113676

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…Recently, AgNW-based transparent heaters have gained significant attention . The electrical stability of these electrodes is a critical factor in determining their overall robustness, especially when subjected to a high electric field, which induces high temperature through Joule heating.…”

Section: Resultsmentioning

confidence: 99%

One-Step Synthesis of Graphene-Covered Silver Nanowires with Enhanced Stability for Heating and Strain Sensing

Fan,

Kuo,

Yin

et al. 2024

ACS Appl. Mater. Interfaces

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Solution-processed silver nanowire (AgNW) networks have been considered as promising electrode candidates for next-generation electronic devices. However, they suffer from poor thermal and electrical stability and low mechanical properties, hindering their practical applications. In this work, graphene nanosheets are successfully introduced into AgNW via a facile onestep solvothermal process. Benefiting from increased conductive paths, the resultant AgNW/graphene films exhibit high electrical conductivity. More importantly, the interlocking NW morphology can be maintained under high temperature and applied voltage due to suppressed Ag migration, which is enabled by the introduction of graphene. This feature leads to enhanced thermal and electrical stability, making them suitable for use as transparent heaters. Furthermore, the composite films present excellent mechanical performance, and negligible resistance change is observed after 10 000 repeated bending cycles. To demonstrate their feasibility toward sensor applications, sandwiched strain sensors are designed, which can endure larger tensile strains and show higher sensitivity and repeatability compared with pure AgNW-based device. Furthermore, various hand gestures can be easily recognized by the resultant sensors based on unique combinations of sensing response. This work not only provides a low-cost method to realize large-scale synthesis of AgNW/graphene composites but also offers guidance to prepare high-performance electrodes for advanced electronics.

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Section: Resultsmentioning

confidence: 99%

One-Step Synthesis of Graphene-Covered Silver Nanowires with Enhanced Stability for Heating and Strain Sensing

Fan,

Kuo,

Yin

et al. 2024

ACS Appl. Mater. Interfaces

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“…To address the stability issue of AgNWs, protective coatings have been used in previous studies. These coatings include metal oxides (MoO x 35 WO x 36 NiO 37 ZnO and Al 2 O 3 38 ), metals (palladium (Pd) 39 , nickel (Ni) 26 gold (Au) 40 – 42 ), graphene 43 , 44 , and polymers. Though these coatings can improve chemical stability, they may have negative effects on optoelectronic properties due to their low electrical conductivity like most metal oxides and polymers.…”

Section: Introductionmentioning

confidence: 99%

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Gholami,

Tajabadi,

Taghavinia

et al. 2023

Sci Rep

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Silver nanowires (AgNWs) with a low diameter, high aspect ratio, stable suspension, and easy synthesis have recently attracted the optoelectronic industry as a low-cost alternative to indium tin oxide transparent conductive films. However, silver nanowires are not chemically stable, and their conductivity diminishes over time due to reactions with atmospheric components. This is a bottleneck for their wide industrial applications. In this study, we aim to address this issue by synthesizing silver nanowires with an average diameter of approximately 65 nm and a length of approximately 13 µm. The prepared Ag nanowires are then applied to fabricate transparent, flexible, and chemically stable conductive films. The fabrication includes spraying of silver nanowires suspension on a glass substrate followed by Dr. blade coating of polystyrene (PS) solution and delamination of the PS-AgNWs film. The resulting film exhibits an optimum sheet resistance of 24 Ω/□ and transmittance of 84%. To further enhance the stability of the transparent conductive film, the facial and scalable double pulse electrodeposition method is used for coating of gold on the exposed surface of the AgNWs embedded in PS. The final transparent film with gold coating demonstrates a remarkable stability under harsh conditions including long exposure to UV light and nitric acid solution. After 100 min of UV/Ozone treatment, the increase in sheet resistance of the optimal PS-AgNW@Au sample is 15.6 times lower than the samples without gold coating. In addition, the change in sheet resistance after 2000 bending cycles in the optimal PS-AgNW@Au electrode is measured and it showed an increase of only 22% of its initial sheet resistance indicating its good flexibility. The proposed electrode performs an excellent chemical stability, good conductivity, transparency, and flexibility that makes it a potential candidate for various optoelectronic devices.

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Selective Void Deposition by Continuous, Ultrathin Ag Film Enabled Stable, High‐Performance AgNWs‐Based Transparent Heaters

Thi,

Nguyen,

Patel

et al. 2024

Small

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Metallic nanowire‐based transparent conductors (MNTCs) are essential to various technologies, including displays, heat‐regulating windows, and photo‐communication. Hybrid configurations are primarily adopted to design stable, high‐functioning MNTCs. Although hybrid MNTCs enhance electrical performance, they often suffer from optical degradation due to losses associated with the hybrid layers. Highly conductive hybrid MNTCs with minimal reduction in transparency are achieved with AgNWs/Ag(O)/Al‐doped ZnO (AZO) design. The design provides a high visible light transmittance of 95.1%, representing a minimized optical loss of 3% compared to pristine AgNWs by optimizing optical interference between the AZO and Ag(O) layers. Furthermore, it allows for enhanced mobility of metallic nanowires by controlling the selective formation of conductive layers in the voids of the nanowire networks. The oxygen additive enables a continuous Ag ultrathin film of 6 nm in the macro‐voids of AgNWs system, corresponding to 25 times higher mobility for AgNWs/Ag(O)/AZO than that of sole AgNWs. The significant enhancement in the mobility of AgNWs/Ag(O)/AZO induces a reduction of sheet resistance of MNTCs by 73%. The AgNWs/Ag(O)/AZO, with an optimized sheet resistance of 24 Ω sq−1, is explored for transparent heater applications, demonstrating a fast thermal response with reliable stability, as evidenced by consistent high‐temperature profiles during prolonged operation.

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Highly reliable MoOx/Ag NW bilayer transparent conductive thin films fabricated by all solution process and transparent heater application

Cited by 6 publications

References 48 publications

One-Step Synthesis of Graphene-Covered Silver Nanowires with Enhanced Stability for Heating and Strain Sensing

One-Step Synthesis of Graphene-Covered Silver Nanowires with Enhanced Stability for Heating and Strain Sensing

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Selective Void Deposition by Continuous, Ultrathin Ag Film Enabled Stable, High‐Performance AgNWs‐Based Transparent Heaters

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