Image and Signal Sensors for Computing and Machine Vision: Developments to Meet Future Needs

Vuuren, Ross D. Jansen-van; Ali, Shahnewaz; Pandey, Ajay K.

doi:10.1007/978-3-030-22587-2_1

Cited by 9 publications

(3 citation statements)

References 128 publications

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“…One way around these deficiencies is to use alternative photosensor materials [11]. The three main classes of materials that have been explored include organic semiconductors (OSCs) [12][13][14][15][16], perovskites [17][18][19][20] and, to a lesser extent, colloidal quantum dots (QDs) [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Frontiers in Photosensor Materials and Designs for New Image Sensor Applications

2021

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Certain applications of image sensors require capabilities that are beyond the technology of current image sensors such as automated quality inspection systems based on color discrimination under varying levels of illumination. This paper serves to provide a brief overview of image sensor technologies involving the use of alternative photosensor materials (organic semiconductors and perovskites) being developed to meet these needs. The discussion around such developments is typically confined to chemistry and physics "silos"; by publishing in this special edition, the authors hope to bridge the knowledge gap between scientists developing new photosensor materials and engineers developing image sensors for new machine vision systems.

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Section: Introductionmentioning

confidence: 99%

Frontiers in Photosensor Materials and Designs for New Image Sensor Applications

2021

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“…The photocurrent curve as a function of light intensity was further fitted to be I ∝ P 0.54 over the wide light intensity range (Figure d). The noninteger exponent θ suggests the existence of recombination loss in the device, which may arise from the carrier recombination occurred at the grain boundaries and surface trap states in the perovskite film …”

mentioning

confidence: 99%

“…The noninteger exponent θ suggests the existence of recombination loss in the device, which may arise from the carrier recombination occurred at the grain boundaries and surface trap states in the perovskite film. 33 To quantitatively assess the performance of the present perovskite photodetector, key performance parameters, including responsivity (R), specific detectivity (D*), and external quantum efficiency (EQE), were calculated according to the following equations 34,35…”

mentioning

confidence: 99%

Fabrication of Addressable Perovskite Film Arrays for High-Performance Photodetection and Real-Time Image Sensing Application

Wang

Zhang

Zeng

et al. 2021

J. Phys. Chem. Lett.

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Patterned growth of periodic perovskite film arrays is essential for application in sensing devices and integrated optoelectronic systems. Herein, we report on patterned growth of addressable perovskite photodetector arrays through an uncured polydimethylsiloxane (PDMS) oligomer-assisted solution-processed approach, in which a periodic hydrophilic/ hydrophobic substrate replicating the predesigned patterns of the PDMS stamp was formed due to the migration of uncured siloxane oligomers in the PDMS stamp to the intimately contacted substrate. By using this technique, MAPbI 3 film photodetector arrays with neglectable pixel-to-pixel variation, a responsivity of 2.83 A W −1 , specific detectivity of 5.4 × 10 12 Jones, and fast response speed of 52.7/57.1 μs (response/recovery time) were achieved. An 8 × 8 addressable photodetector array was further fabricated, which functioned well as a real-time image sensor with reasonable spatial resolution. It is believed that the proposed strategy will find potential application in large-scale fabrication of other photodetector arrays, which might be potentially important for future integrated optoelectronic devices.

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Localized Surface‐Plasmon Enhanced Near‐Infrared Organic Photodetector

Zhao

et al. 2022

Advanced Optical Materials

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Near infrared (NIR) organic photodetector (OPD) has exhibited tremendous potential in research due to mechanical flexibility, optoelectronic tunability, and low cost. However, the limited NIR light absorption, low carrier mobility, and relatively low photon‐to‐electron conversion efficiency in organic photoactive layer have restricted further development of OPD. To address these challenges, localized surface‐plasmon resonance (LSPR) enhanced D18:Y6 OPD is systematically designed and fabricated with uniform Ag nanocubes (AgNCs) of 60 nm deposited right on D18:Y6 organic photoactive layers, realizing a 25‐fold enhancement in responsivity and detectivity which reach 2200 mA W−1 and 2.8 × 1012 Jones, respectively, upon 850 nm laser excitation compared with pristine device without AgNCs. The detailed COMSOL Physics simulation of as‐obtained devices with AgNCs indicates that electric filed is strongly amplified and concentrated within the D18:Y6 film. The enhancement of photoluminescence intensity in D18:Y6 films with AgNCs further verifies the resonant enhancement of light absorption in the D18:Y6 film embedded with AgNCs. To get in‐depth knowledge of the LSPR enhancement effect on OPD, the photocurrent enhancement of devices with different laser power densities and plasmonic modes have been systematically explored. Therefore, this work has opened a new window to enhance the photoresponse for next generation NIR OPDs.

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Image and Signal Sensors for Computing and Machine Vision: Developments to Meet Future Needs

Cited by 9 publications

References 128 publications

Frontiers in Photosensor Materials and Designs for New Image Sensor Applications

Frontiers in Photosensor Materials and Designs for New Image Sensor Applications

Fabrication of Addressable Perovskite Film Arrays for High-Performance Photodetection and Real-Time Image Sensing Application

Localized Surface‐Plasmon Enhanced Near‐Infrared Organic Photodetector

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