High‐Resolution Spin‐on‐Patterning of Perovskite Thin Films for a Multiplexed Image Sensor Array

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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“…[150][151][152][153][154] The flexible form factor of the integrated electronic system will provide new design platform for the wearable display.…”

Section: Flexible Qleds Integrated With Other Electronic Devicesmentioning

confidence: 99%

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

et al. 2018

Self Cite

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“…Another major limitation of a pacemaker is the limited lifespan of the battery, and this necessitates additional surgical procedures to replace the discharged battery . Soft bioelectronic devices that can generate power, including triboelectric (Figure b), piezoelectric (Figure c), solar‐powered (Figure d), and wirelessly powered devices, are especially promising for overcoming the limited battery life because they are thin, lightweight, and biocompatible, ideal for implantable device applications …”

Section: Soft Bioelectronics–assisted Therapymentioning

confidence: 99%

Wearable and Implantable Devices for Cardiovascular Healthcare: from Monitoring to Therapy Based on Flexible and Stretchable Electronics

Hong

Jeong

Cho

et al. 2019

Adv Funct Materials

395

271

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Cardiovascular disease is the leading cause of death and has dramatically increased in recent years. Continuous cardiac monitoring is particularly important for early diagnosis and prevention, and flexible and stretchable electronic devices have emerged as effective tools for this purpose. Their thin, soft, and deformable features allow intimate and long-term integration with biotissues, which enables continuous, high-fidelity, and sometimes large-area cardiac monitoring on the skin and/or heart surface. In addition to monitoring, intimate contact is also crucial for high-precision therapies. Combined with tissue engineering, soft bioelectronics have also demonstrated the capability to repair damaged cardiac tissues. This review highlights the recent advances in wearable and implantable devices based on flexible and stretchable electronics for cardiovascular monitoring and therapy. First, wearable/implantable soft bioelectronics for cardiovascular monitoring (e.g., the electrocardiogram, blood pressure, and oxygen saturation level) are reviewed. Then, advances in cardiovascular therapy based on soft bioelectronics (e.g., mesh pacing, ablation, robotic sleeves, and electronic stents) are discussed. Finally, device-assisted tissue engineering therapy (e.g., functional electronic scaffolds and in vitro cardiac platforms) is discussed.

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“…[21][22][23][24][25][26][27][28][29][30] To realize a multiplexing signal readout for organic photodiodes, transistors-which are three-terminal devices-have been commonly used. [6,9,[36][37][38][39][40][41] Under a certain bias, the device exhibits a light-dependent current response by turning on organic photodiodes. [16] Alternatively, a blocking diode is also applicable as a switch in an image sensor by connecting with a photodiode in the reverse direction.…”

Section: Doi: 101002/aelm201800311mentioning

confidence: 99%

“…A vertical stack of organic photodiodes and diodes is depicted. [1,17,18,31,34,37,38,42,43] The device consists of an inverted organic photodiode with a bulk-heterojunction photoactive layer of poly(3-hexylthiophene-2,5-diyl) (P3HT): [6,6]-phenyl C 61 butyric acid methyl ester (PCBM), and a noninverted organic blocking diode with a semiconducting material, P3HT. The structure achieved a pixel density of 224 ppi, which, to the best of our knowledge, is the highest density among imagers on flexible plastic foil substrates.…”

Section: Doi: 101002/aelm201800311mentioning

confidence: 99%

Low‐Power Monolithically Stacked Organic Photodiode‐Blocking Diode Imager by Turn‐On Voltage Engineering

Matsuhisa

Zalar

et al. 2018

Adv Elect Materials

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Multiplexing the signal readout from the organic photodetector matrix is essential for high‐resolution and large‐area imaging applications. This endeavor can be realized by pixels containing photodiodes and switching elements, such as transistors or blocking diodes. The use of blocking diodes is beneficial for simpler fabrication and fewer wires than transistors. However, imagers with blocking diodes can always require additional voltage to turn off the unselected lines, which causes high standby power and increased complexity of the readout circuit. In this study, low standby power organic imagers are realized that are suitable for wearable optical imaging applications in which resources for power and readout circuits are limited. Pixels with a vertical stack of organic photodiodes and blocking diode layers are investigated. By increasing the built‐in potential of blocking diodes, the turn‐on voltage of the monolithically stacked photodiode‐blocking diode device can be adjusted to enable its turn‐off at 0 V. This leads to a three‐orders‐of‐magnitude reduction of the current of pixels at 0 V. With these pixels, imagers based on organic photodiode‐blocking diode stack devices are demonstrated with improved image quality and substantially reduced crosstalk current, while operating at zero standby power.

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High‐Resolution Spin‐on‐Patterning of Perovskite Thin Films for a Multiplexed Image Sensor Array

Cited by 160 publications

References 34 publications

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

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

Wearable and Implantable Devices for Cardiovascular Healthcare: from Monitoring to Therapy Based on Flexible and Stretchable Electronics

Low‐Power Monolithically Stacked Organic Photodiode‐Blocking Diode Imager by Turn‐On Voltage Engineering

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