Wearable Electronics: Wearable Supercapacitors Printed on Garments (Adv. Funct. Mater. 11/2018)

Lee, Seong‐Sun; Choi, Kyung Il; Kim, Sehee; Lee, Sang Young

doi:10.1002/adfm.201870074

Cited by 42 publications

(40 citation statements)

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“…Mimicry of human visual system is thus a critical step toward artificial intelligence. In this context, humanoid optoelectronic devices capable of detecting and memorizing images are very appealing, which may find wide applications in smartphones, drones, robots, and visual prostheses . While traditional photodetectors can convert light stimuli into electrical signals, the optical information will fade away quickly when the light stimuli are removed .…”

Section: Comparison Of Device Structure and Performance Between The Pmentioning

confidence: 99%

“…It is also noteworthy that by adopting appropriate f AC values, the Δ C values induced by different illumination conditions can be modulated to be almost the same, as demonstrated in Figure 6b. This is reminiscent of the iris in human eyes, which can adapt to the light environment variation via controlling the pupil size . Therefore, the Au/LSNO/Au memcapacitor exhibits the function of self‐adaptive optical signal detection.…”

Section: Comparison Of Device Structure and Performance Between The Pmentioning

confidence: 99%

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An Artificial Optoelectronic Synapse Based on a Photoelectric Memcapacitor

Zhao

Fan

Cheng

et al. 2019

Adv Elect Materials

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away quickly when the light stimuli are removed. [3][4][5] In other words, traditional photodetectors can detect the images like a retina, but they lack the memory function owned by the visual cortex (see schematic illustration of human visual system in Figure 1a). To realize both detection and memory functions so as to better imitate the human visual system, researchers have attempted to integrate the photodetectors with the nonvolatile memory devices. [6][7][8][9] For example, a bioinspired visual system comprising an In 2 O 3 nanowire photodetector connected in series with an Al 2 O 3 memristor was fabricated recently, which could capture a butterflyshaped image and store it for more than 1 week. [9] In such integrated devices, however, the units responsible for detection, processing, and storage of optical information are physically separated, resulting in high power consumption for data transfer between different units (just as the Von Neumann bottleneck [10,11] ).A simple yet effective humanoid optoelectronic device emerging recently is the artificial optoelectronic synapse based on the photoelectric memristor, which can co-locate the detection and memory functions in a single unit. As the name suggests, a photoelectric memristor can continuously change its resistance upon light stimuli, resembling the physiological The rapid development of artificial intelligence technology has led to the urge for artificial optoelectronic synapses with visual perception and memory capabilities. A new type of artificial optoelectronic synapse, namely a photo electric memcapacitor, is proposed and demonstrated. This photoelectric memcapacitor, with a planar Au/La 1.875 Sr 0.125 NiO 4 /Au metal-semiconductormetal structure, displays a complementary optical and electrical modulation of capacitance, which can be attributed to the charge trapping/detrapping induced Schottky barrier variation. It further exhibits versatile synaptic functions, such as photonic potentiation/electric depression, pairedpulse facilitation, short/longterm memory, and "learningexperience" behavior. Moreover, the photoplasticity of the memcapacitor can be modulated by varying the frequency of applied AC voltage, thus enabling selfadaptive optical signal detection and mimicry of interestmodulated human visual memory. Therefore, it represents a new paradigm for artificial optoelectronic synapses and opens up opportunities for developing lowpower humanoid optoelectronic devices.

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Section: Comparison Of Device Structure and Performance Between The Pmentioning

confidence: 99%

Section: Comparison Of Device Structure and Performance Between The Pmentioning

confidence: 99%

An Artificial Optoelectronic Synapse Based on a Photoelectric Memcapacitor

Zhao

Fan

Cheng

et al. 2019

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…The arthropod species have developed and optimized their super sophisticated compound eye vision system over millions of years of evolution, and they provide valuable sources of inspiration to human beings to track and imitate . Although the artificial compound eye (ACE) components in the visible light region are widely reported and some mimicking bio‐vision systems are demonstrated, the minimized high‐performance ACE components fully working in the IR region are still rarely reported. The compact lightweight IR optics with multi‐aperture and large field of view (FoV) are highly demanded in booming applications, for instance, autonomous navigation, robot vision, remote surveillance, trace gas detection, multi‐target tracking, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…Although the artificial compound eye (ACE) components in the visible light region are widely reported and some mimicking bio‐vision systems are demonstrated, the minimized high‐performance ACE components fully working in the IR region are still rarely reported. The compact lightweight IR optics with multi‐aperture and large field of view (FoV) are highly demanded in booming applications, for instance, autonomous navigation, robot vision, remote surveillance, trace gas detection, multi‐target tracking, and so on. On the other hand, the current ACE device fabrications are mainly based on reshaping of a flexible planar microlens array, but these methods normally induce morphology distortion due to the nonuniform distribution of strain force applied onto the device, and sometimes the extra fluid pressure supplies are desired …”

Section: Introductionmentioning

confidence: 99%

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IR Artificial Compound Eye

Liu

Bian

Zhang

et al. 2019

Advanced Optical Materials

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In this work, a 3D IR artificial compound eye (ACE) optical component is fabricated using thermoplastic IR polymer material. The femtosecond laser‐assisted wet etching and the 3D nano‐imprinting techniques are proposed for fabricating this thin shell multi‐aperture component. The prepared component is close‐packed with over 1000 high‐quality micro‐facet‐lenslets (ommatidia) on the semispherical thin shell dome with base radius of 2.7 mm and sag height of 2.1 mm, enabling enlarged field of view to 148°. The ommatidia with diameter of 150 µm and numerical aperture of 0.35 are demonstrated to have a practical spatial resolution up to 160 lp mm−1. IR imaging experiments (both in passive and active scenarios) confirm its outstanding optical properties and uniformity, and demonstrate the probability of thermal target imaging with such component in the near‐infrared band. The proposed fabrication strategy shows remarkable efficiency and advantage in massive replication, and such ACE component predicts its potential in emerging applications, such as IR imaging, target tracking, and so on.

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Photovoltage‐Competing Dynamics in Photoelectrochemical Devices: Achieving Self‐Powered Spectrally Distinctive Photodetection

Liu

Wang

Kang

et al. 2021

Adv Funct Materials

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Multiple-band and spectrally distinctive photodetection play critical roles in building next-generation colorful imaging, spectroscopy, artificial vision, and optically controlled logic circuits of the future. Unfortunately, it remains challenging for conventional semiconductor photodetectors to distinguish different spectrum bands with photon energy above the bandgap of the material. Herein, for the first time, a photocurrent polarity-switchable photoelectrochemical device composed of group III-nitride semiconductors, demonstrating a positive photocurrent density of 10.54 µA cm −2 upon 254 nm illumination and a negative photocurrent density of −0.08 µA cm −2 under 365 nm illumination without external power supply, is constructed. Such bidirectional photocurrent behavior arises from the photovoltage-competing dynamics across two photoelectrodes. Importantly, a significant boost of the photocurrent and corresponding responsivity under 365 nm illumination can be achieved after decorating the counter electrode of n-type AlGaN nanowires with platinum (Pt) nanoparticles, which promote a more efficient redox reaction in the device. It is envisioned that the photocurrent polarity-switch behavior offers new routes to build multiple-band photodetection devices for complex light-induced sensing systems, covering a wide spectrum band from deep ultraviolet to infrared, by simply engineering the bandgaps of semiconductors.

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Wearable Electronics: Wearable Supercapacitors Printed on Garments (Adv. Funct. Mater. 11/2018)

Cited by 42 publications

References 0 publications

An Artificial Optoelectronic Synapse Based on a Photoelectric Memcapacitor

An Artificial Optoelectronic Synapse Based on a Photoelectric Memcapacitor

IR Artificial Compound Eye

Photovoltage‐Competing Dynamics in Photoelectrochemical Devices: Achieving Self‐Powered Spectrally Distinctive Photodetection

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