Ultraflexible organic photonic skin

Yokota, Tomoyuki; Zalar, Polona; Kaltenbrunner, Martin; Jinno, Hiroaki; Matsuhisa, Naoji; Kitanosako, Hiroki; Tachibana, Y.; Yukita, Wakako; Koizumi, Mari

doi:10.1126/sciadv.1501856

Cited by 893 publications

(853 citation statements)

References 45 publications

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“…The temporal response shown here is more than sufficient for tracking physiological signals such as heart rate and blood oxygenation. While previous demonstrations 37,38 with flexible organic photodiodes focus on the visible wavelength region, here we utilize NIR detection, which has deeper penetration depth in biological tissues. Figure 6b is a schematic for using our NIR photodiode to monitor heart beats through detecting light transmission change at a fingertip.…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Temperature-Dependent Detectivity of Near-Infrared Organic Bulk Heterojunction Photodiodes

Yao

London

et al. 2017

ACS Appl. Mater. Interfaces

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Bulk heterojunction photodiodes are fabricated using a new donor−acceptor polymer with a near-infrared absorption edge at 1.2 μm, achieving a detectivity up to 10 12 Jones at a wavelength of 1 μm and an excellent linear dynamic range of 86 dB. The photodiode detectivity is maximized by operating at zero bias to suppress dark current, while a thin 175 nm active layer is used to facilitate charge collection without reverse bias. Analysis of the temperature dependence of the dark current and spectral response demonstrates a 2.8-fold increase in detectivity as the temperature was lowered from 44 to −12°C , a relatively small change when compared to that of inorganic-based devices. The near-infrared photodiode shows a switching speed reaching up to 120 μs without an external bias. An application using our NIR photodiode to detect arterial pulses of a fingertip is demonstrated.

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Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Temperature-Dependent Detectivity of Near-Infrared Organic Bulk Heterojunction Photodiodes

Yao

London

et al. 2017

ACS Appl. Mater. Interfaces

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“…[1][2][3][4][5][6] Recent additional, related efforts seek to establish capabilities in rendering electronics capable not only of bending but also of stretching, where elastomers serve as the substrates. [7][8][9][10][11][12][13][14][15][16][17] Such systems can establish intimate, conformal contacts to complex curvilinear surfaces, such as those found in biology, with endurance to high levels of strain. Neither such characteristics is possible with conventional, rigid technologies formed on the surfaces of semiconductor wafers or glass panels.…”

Section: Introductionmentioning

confidence: 99%

Inorganic semiconducting materials for flexible and stretchable electronics

et al. 2017

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Recent progress in the synthesis and deterministic assembly of advanced classes of single crystalline inorganic semiconductor nanomaterial establishes a foundation for high-performance electronics on bendable, and even elastomeric, substrates. The results allow for classes of systems with capabilities that cannot be reproduced using conventional wafer-based technologies. Specifically, electronic devices that rely on the unusual shapes/forms/constructs of such semiconductors can offer mechanical properties, such as flexibility and stretchability, traditionally believed to be accessible only via comparatively low-performance organic materials, with superior operational features due to their excellent charge transport characteristics. Specifically, these approaches allow integration of high-performance electronic functionality onto various curvilinear shapes, with linear elastic mechanical responses to large strain deformations, of particular relevance in bio-integrated devices and bio-inspired designs. This review summarizes some recent progress in flexible electronics based on inorganic semiconductor nanomaterials, the key associated design strategies and examples of device components and modules with utility in biomedicine.

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“…Displays with flexible form factors have thin, lightweight, and nonbreakable characteristics, which enable the fabrication of displays on curvilinear surfaces and allow their shapes to be transformed. 3,4 In 2008, Nokia announced Morph, an innovative mobile display concept with flexible, bendable, and interactive features. This was followed by the development of early prototypes of flexible e-paper.…”

Section: Introductionmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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In the future electronics, all device components will be connected wirelessly to displays that serve as information input and/or output ports. There is a growing demand of flexible and wearable displays, therefore, for information input/output of the nextgeneration consumer electronics. Among many kinds of light-emitting devices for these next-generation displays, quantum dot light-emitting diodes (QLEDs) exhibit unique advantages, such as wide color gamut, high color purity, high brightness with low turn-on voltage, and ultrathin form factor. Here, we review the recent progress on flexible QLEDs for the next-generation displays. First, the recent technological advances in device structure engineering, quantum-dot synthesis, and high-resolution full-color patterning are summarized. Then, the various device applications based on cutting-edge quantum dot technologies are described, including flexible white QLEDs, wearable QLEDs, and flexible transparent QLEDs. Finally, we showcase the integration of flexible QLEDs with wearable sensors, micro-controllers, and wireless communication units for the next-generation wearable electronics.

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Ultraflexible organic photonic skin

Abstract: Optoelectronic electronic skins, or e-skins, introduce electronic sensing and displays on the surface of human skin.

Cited by 893 publications

References 45 publications

Temperature-Dependent Detectivity of Near-Infrared Organic Bulk Heterojunction Photodiodes

Temperature-Dependent Detectivity of Near-Infrared Organic Bulk Heterojunction Photodiodes

Inorganic semiconducting materials for flexible and stretchable electronics

Flexible quantum dot light-emitting diodes for next-generation displays

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