Recent progress in strain-engineered elastic platforms for stretchable thin-film devices

Cho, Hyeon; Lee, Byeongmoon; Jang, Dongju; Yoon, Jinsu; Chung, Seok; Hong, Yongtaek

doi:10.1039/d2mh00470d

Cited by 29 publications

(16 citation statements)

References 97 publications

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“…This mechanism is similar to the "rigid-islands" concept recently studied and utilized by researchers in stretchable electronics and displays to effectively alleviate strain stress. [6,39,40] The rigid islands are strategically placed, non-deformable regions in a stretchable device, designed to preserve the performance of electronic components, such as transistors, sensors, and other circuit elements. They protect these components from excessive strain that could potentially damage their delicate structures or compromise their electrical properties.…”

Section: Fabrication Of Single Conductive Fibers With Crack-controlle...mentioning

confidence: 99%

Strain‐Driven Negative Resistance Switching of Conductive Fibers with Adjustable Sensitivity for Wearable Healthcare Monitoring Systems with Near‐Zero Standby Power

et al. 2023

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Recently, one of the primary concerns in e‐textile‐based healthcare monitoring systems for chronic illness patients has been reducing wasted power consumption, as the system should be always‐on to capture diverse biochemical and physiological characteristics. However, the general conductive fibers, a major component of the existing wearable monitoring systems, have a positive gauge‐factor (GF) that increases electrical resistance when stretched, so that the systems have no choice but to consume power continuously. Herein, a twisted conductive‐fiber‐based negatively responsive switch‐type (NRS) strain‐sensor with an extremely high negative GF (resistance change ratio ≈ 3.9 × 108) that can significantly increase its conductivity from insulating to conducting properties is developed. To this end, a precision cracking technology is devised, which could induce a difference in the Young's modulus of the encapsulated layer on the fiber through selective ultraviolet‐irradiation treatment. Owing to this technology, the NRS strain‐sensors can allow for effective regulation of the mutual contact resistance under tensile strain while maintaining superior durability for over 5000 stretching cycles. For further practical demonstrations, three healthcare monitoring systems (E‐fitness pants, smart‐masks, and posture correction T‐shirts) with near‐zero standby power are also developed, which opens up advancements in electronic textiles by expanding the utilization range of fiber strain‐sensors.

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Section: Fabrication Of Single Conductive Fibers With Crack-controlle...mentioning

confidence: 99%

Strain‐Driven Negative Resistance Switching of Conductive Fibers with Adjustable Sensitivity for Wearable Healthcare Monitoring Systems with Near‐Zero Standby Power

et al. 2023

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“…across a range of advances for conformable stretchable electronic or robotic skins that use soft sensors and circuits. [1][2][3] The concept of soft electronics has been demonstrated in various applications, including a body-attachable bio-signal monitoring patch. 4,5 The excitement behind this development is rooted in the possibility that electronics and displays of mechanically deformable form factors soon may be freed from the constraints of conventional flexible or curved form factors.…”

Section: Soft Electronics Are Expected To Play a Key Rolementioning

confidence: 99%

Reconfigurable and Reusable Soft Modular Blocks Assembly

Yoon¹,

Kim²,

Hong³

2022

Information Display

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“…Recent developments in electronic devices have focused on realizing innovative form factors that can be freely bent, rolled, folded, or further stretched to be expanded or reduced to a size desired by a user and conformably contacted or attached to soft substrates such as skin. − Among them, the optoelectronic field made the most remarkable progress with the release of previously unseen flexible electronic devices such as foldable mobile phones, rollable TVs, and seamless tile displays based on new form factors. Furthermore, as the next form factor, stretchable or deformable optoelectronic devices have been actively studied in recent years. − For stretchable and deformable optoelectronic devices, it is essential to secure the stretchability of the transparent electrode transmitting the lights and transporting the electrons.…”

Section: Introductionmentioning

confidence: 99%

Sequentially Coated Wavy Nanowire Composite Transparent Electrode for Stretchable Solar Cells

Kwon

Kim

Lim

et al. 2023

ACS Appl. Mater. Interfaces

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Recent advances in fabricating stretchable and transparent electrodes have led to various techniques for establishing next-generation form-factor optoelectronic devices. Wavy Ag nanowire networks with large curvature radii are promising platforms as stretchable and transparent electrodes due to their high electrical conductivity and stretchability even at very high transparency. However, there are disadvantages such as intrinsic nonregular conductivity, large surface roughness, and nanowire oxidation in air. Here, we introduce electrically synergistic but mechanically independent composite electrodes by sequentially introducing conducting polymers and ionic liquids into the wavy Ag nanowire network to maintain the superior performance of the stretchable transparent electrode while ensuring overall conductivity, lower roughness, and long-term stability. In particular, plenty of ionic liquids can be incorporated into the uniformly coated conducting polymer so that the elastic modulus can be significantly lowered and sliding can occur at the nanowire interface, thereby obtaining the high mechanical stretchability of the composite electrode. Finally, as a result of applying the composite film as the stretchable transparent electrode of stretchable organic solar cells, the organic solar cell exhibits a high power conversion efficiency of 11.3% and 89% compared to the initial efficiency even at 20% tensile strain, demonstrating excellent stretching stability.

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Recent progress in strain-engineered elastic platforms for stretchable thin-film devices

Abstract: Strain-engineered elastic platforms that can efficiently distribute mechanical stress under deformation offer adjustable mechanical compliance for stretchable electronic systems. By fully exploiting strain-free regions that are favourable for fabricating thin-film...

Cited by 29 publications

References 97 publications

Strain‐Driven Negative Resistance Switching of Conductive Fibers with Adjustable Sensitivity for Wearable Healthcare Monitoring Systems with Near‐Zero Standby Power

Strain‐Driven Negative Resistance Switching of Conductive Fibers with Adjustable Sensitivity for Wearable Healthcare Monitoring Systems with Near‐Zero Standby Power

Reconfigurable and Reusable Soft Modular Blocks Assembly

Sequentially Coated Wavy Nanowire Composite Transparent Electrode for Stretchable Solar Cells

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