Efficient and mechanically robust stretchable organic light-emitting devices by a laser-programmable buckling process

Yin, Da; Feng, Jing; Ma, Rui; Liu, Yuefeng; Zhang, Yong‐Lai; Zhang, Xu‐Lin; Bi, Yan‐Gang; Chen, Qi‐Dai; Sun, Hong–Bo

doi:10.1038/ncomms11573

Cited by 203 publications

(83 citation statements)

References 28 publications

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“…Over the past decades, breakthroughs in flexible electronics and nanotechnology have enabled wearable electronic sensors 1,2 that respond to external stimuli via capacitive 3 , resistive 4 , piezoelectric 5 , and triboelectric 6 effects. While microelectronic technologies continue to push wearable devices towards higher sensitivity, faster response, better robustness and denser integration [7][8][9][10][11][12] , it may ultimately reach the limit imposed by the nature of low-frequency electromagnetic fields (i.e., AC currents). For example, response time is limited by parasitic effects and crosstalk in high-density electronic circuitries.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive skin-like wearable optical sensors based on glass micro/nanofibers

Zhang¹,

Pan²,

Zhang³

et al. 2020

Opto-Electronic Advances

140

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Electronic skin, a class of wearable electronic sensors that mimic the functionalities of human skin, has made remarkable success in applications including health monitoring, human-machine interaction and electronic-biological interfaces. While electronic skin continues to achieve higher sensitivity and faster response, its ultimate performance is fundamentally limited by the nature of low-frequency AC currents. Herein, highly sensitive skin-like wearable optical sensors are demonstrated by embedding glass micro/nanofibers (MNFs) in thin layers of polydimethylsiloxane (PDMS). Enabled by the transition from guided modes into radiation modes of the waveguiding MNFs upon external stimuli, the skin-like optical sensors show ultrahigh sensitivity (1870 kPa-1), low detection limit (7 mPa) and fast response (10 μs) for pressure sensing, significantly exceeding the performance metrics of state-of-the-art electronic skins. Electromagnetic interference (EMI)-free detection of high-frequency vibrations, wrist pulse and human voice are realized. Moreover, a five-sensor optical data glove and a 2×2-MNF tactile sensor are demonstrated. These initial results pave the way toward a new category of optical devices ranging from ultrasensitive wearable sensors to optical skins.

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Section: Introductionmentioning

confidence: 99%

Ultrasensitive skin-like wearable optical sensors based on glass micro/nanofibers

Zhang¹,

Pan²,

Zhang³

et al. 2020

Opto-Electronic Advances

140

View full text Add to dashboard Cite

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“…where φ is the height of the potential barrier between adjacent particles and m is the electron mass. Similar to the model reported by Chen et al 62 , R/R0 at stages 1-2 and stage 3 can be expressed by equations (6) and (7).…”

Section: Figure 2cmentioning

confidence: 53%

Highly Stretchable Conductors Based on Expanded Graphite Macroconfined in Tubular Rubber

Luo

Chen

et al. 2017

ACS Appl. Mater. Interfaces

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Highly stretchable and durable conductors are significant to the development of wearable devices, robots, human-machine interfaces, and other artificial intelligence products. Although many respectable methods have been reported, it is still a challenge to fabricate stretchable conductors with a large elastic limit, high conductivity, and excellent reliability in rapid, effective, and economic ways. Herein, a facile method is offered to fabricate high-performance stretchable tubular conductors (TCs) based on a macroconfined structure of expanded graphite (EG) in rubber tubing by simply physical packing. The maximum original electrical conductivity of TCs reached a high value of 160.6 S/cm. Meanwhile, TCs showed more insensitive response of conductivity to increasing tensile strain compared to the TCs encapsulated with liquid metal or ionic liquid. The conductivity and effective stretchability of TCs can be adjusted by varying the packing density of EG. A low gauge factor below 3 was reached even under 400% stretching for TCs with a packing density of 1.233 g/cm. The excellent resilience and good stability of conductivity of TCs during dynamic stretching-releasing cycles are attributed to the stable and rapid reconstruction of the percolation network of EG particles. The combination of high conductivity, tunable stretchability, and good reliability renders potential applications to TCs, such as highly stretchable interconnects or strain sensors, in human motion detection.

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“…By increasing bending counts, the efficiency is slightly increased at initial bending and it is maintained until 300 bending cycles. The reason why the efficiency is increased is due to the decrease of current density [12]. The internal resistance is increased through interlayer detachment between neighboring layers.…”

Section: Resultsmentioning

confidence: 99%

P‐72: Nozzle Jet Printing of Organic Thin Films for Solution Process of Organic Light Emitting Diodes

Kim

Yoon

et al. 2019

Symp Digest of Tech Papers

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Efficient and mechanically robust stretchable organic light-emitting devices by a laser-programmable buckling process

Cited by 203 publications

References 28 publications

Ultrasensitive skin-like wearable optical sensors based on glass micro/nanofibers

Ultrasensitive skin-like wearable optical sensors based on glass micro/nanofibers

Highly Stretchable Conductors Based on Expanded Graphite Macroconfined in Tubular Rubber

P‐72: Nozzle Jet Printing of Organic Thin Films for Solution Process of Organic Light Emitting Diodes

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