Fabrication Techniques for Curved Electronics on Arbitrary Surfaces

Wu, Hao; Tian, Yü; Luo, Haibo; Zhu, Hui; Duan, Yongqing

doi:10.1002/admt.202000093

Cited by 60 publications

(41 citation statements)

References 259 publications

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“…Such a press-free conformal-contact process will contribute to a formation technology of SWNT thin-film electrodes on variously shaped and/or fragile material substrates, and is necessary in the currently progressing curved electronics. [40,41] In addition, we propose a new solution-processable pre-doping technique by an acid treatment of PTFE@SWNTs using an aqueous solution of HNO 3 (Pathway 3 of Method C). In a typical case, the as-doped HNO 3 -SWNT thin film is successfully transferred from a toluene-wetted PTFE@HNO 3 -SWNT onto a PVK layer (Pathway 2 from 3 of Method C).…”

Section: Introductionmentioning

confidence: 99%

Solution‐Processed Chemically Non‐Destructive Filter Transfer of Carbon‐Nanotube Thin Films onto Arbitrary Materials

Ishizaki

Satoh

Ando

et al. 2021

Adv Materials Inter

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attention based on their unique properties such as flexibility, electrical and thermal conductivities, and enhanced p-type [6,9] and modified n-type [10] semiconductor characters. [2,11,12] In low-temperature solution-processable device technologies, such convenient and low energy-consuming processes have prompted exhaustive wide-field research. [13][14][15] Environmentally friendly aqueous dispersion solutions of single-walled CNTs (SWNTs) are industrially applicable; however, we suffer from dispersant molecules seriously insulating electrical communication on solution-processed SWNT film networks. Rinzler et al. overcame the drawback by a breakthrough filter-transfer method using a mixed cellulose ester (MCE) membrane. The filtrated ultra-thin SWNT films were transferred onto substrates by the dissolution removal of MCE (Figure 1, Method A). [16] Jin et al. reported that a floating method of a similarly filtrated SWNT thin film apart from MCE, and the as-floated SWNT film was picked up on a substrate (Method B). [17] See-through perovskite (PVK) solar cells have been successfully prepared using top-contact SWNT thin films [18,19] by a dry filter-transfer method using MCE membranes reported by Kauppinen et al. [20] Simply structured crystalline Si-SWNT heterojunction solar cells have been prepared by the solution-processed [21][22][23][24][25][26][27][28] and dry filter-transfer [29][30][31][32] methods with increasing photo-conversion efficiencies up to ≥17%. [25,31,33,34] See-through solar cells are indispensable for state-of-the-art tandem devices combined with crystalline Si solar cells driven by visible and near IR lights. [35,36] The stability of CNTs against chemical corrosion is a fascinating feature as a top-contact electrode on the PVK layers. The high-conductivity p-type semiconductor character of CNTs with the ≈5 eV work function realizes hole-transport layer-free PVK solar cells. [2,[37][38][39] Therefore, the discovery of a convenient solution-processable technology for preparing top-contact thin films of SWNTs using their aqueous dispersion solutions is key to achieving all solution-processed photovoltaic cells that exclude evaporated metal electrodes and expensive p-type organic semiconductors; however, PVK layers are sensitively decomposed by water, some hydrophilic solvents, and some dissolved chemicals. Furthermore, solution-processable p-type doping technologies of SWNT thin films are crucial Filter-transfer methods of single-walled carbon-nanotube (SWNT) thin films have been widely employed to fabricate state-of-the-art electronics and photonics devices with highly transparent and conductive electrodes; however, a challenge remains for all solution-processable technologies to overcome substrates' destruction due to their solvent incompatibility. Here, an advanced method of transferring SWNT thin films onto arbitrary material substrates by adopting chemically stable and flexible polytetrafluoroethylene (PTFE) membranes is reported. Filtrated SWNT thin films on PTFE membranes (PTFE@SWNTs) pres...

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Section: Introductionmentioning

confidence: 99%

Solution‐Processed Chemically Non‐Destructive Filter Transfer of Carbon‐Nanotube Thin Films onto Arbitrary Materials

Ishizaki

Satoh

Ando

et al. 2021

Adv Materials Inter

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show abstract

“…In addition, for both of the aforementioned two approaches, since the imagers were not stretched or compressed on the 3D surface, there was inevitably space between the retina‐like substrate and part of the devices in the imagers. [ 32 ] However, how this space issue will influence the image quality recorded by these retina‐like imagers has never been discussed.…”

Section: Retina‐like Imagersmentioning

confidence: 99%

Artificial Visual Electronics for Closed‐Loop Sensation/Action Systems

Jiang

Chen

et al. 2021

Advanced Intelligent Systems

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Artificial visual electronics that mimic the structure and function of human eyes can be a powerful tool to provide visual feedback in the closed‐loop sensation/action systems, which can be beneficial to achieve sophisticated functions in a precise and efficient way. Herein, how artificial visual electronics work in the closed‐loop sensation/action systems, mimicking the human eyes for human behaviors, followed by how artificial visual electronics are utilized in various fields are introduced. To fully mimic the human eyes, how to achieve the structural similarity of artificial visual electronics with eyeballs is highlighted, and focused on the key component, i.e., retina‐like 3D light‐detecting imagers. When combined with the machine‐learning method, such retina‐like 3D imagers are expected to significantly benefit the closed‐loop sensation/action systems.

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“…A variety of functional nanomaterials and innovative structures have facilitated enhanced performance of skin‐like sensors, including increased stretchability, sensitivity, response/recovery time, durability, and mechanical adaptability. [ 12–14 ] Hybrid advanced manufacturing strategies, such as 2D/3D printing, [ 15,16 ] laser processing, [ 17–20 ] or lithographic methods [ 21–23 ] enable macroscale flexible sensors to be utilized at rapid speeds. Nevertheless, one or two sensing units cannot satisfy the growing demand of IoTs applications.…”

Section: Introductionmentioning

confidence: 99%

Flexible Hybrid Sensor Systems with Feedback Functions

Takei

2020

Adv Funct Materials

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Skin‐like wearable sensors are regarded as key technologies toward home‐based healthcare, human–machine interfaces, robotics, prostheses, and enhanced augmented/virtual reality (AR/VR). Inspired by human somatosensory functions, artificial sensory feedback systems play vital roles in shaping interactions with complex environments and timely decision‐making. This study presents an overview of recent advances in feedback‐driven, closed‐loop skin‐inspired flexible sensor systems that make use of emerging functional nanomaterials and elaborate structures. Drawing on feedback solutions, four categories of sensor systems are highlighted, which include prosthesis‐ and AR/VR‐based human–machine interfaces, smartphone‐based approaches for point‐of‐care detection, and smart wearable displays for direct signal visualizations. Furthermore, the progress of machine learning on the reliable recognition of massive quantities of signals generated by flexible sensor networks is briefly discussed. The state‐of‐the‐art hybrid sensor techniques, along with other emerging strategies, will enable total sensory feedback loop systems to be developed for next‐generation electronic skins.

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Fabrication Techniques for Curved Electronics on Arbitrary Surfaces

Cited by 60 publications

References 259 publications

Solution‐Processed Chemically Non‐Destructive Filter Transfer of Carbon‐Nanotube Thin Films onto Arbitrary Materials

Solution‐Processed Chemically Non‐Destructive Filter Transfer of Carbon‐Nanotube Thin Films onto Arbitrary Materials

Artificial Visual Electronics for Closed‐Loop Sensation/Action Systems

Flexible Hybrid Sensor Systems with Feedback Functions

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