image sensor array
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2021 ◽  
Author(s):  
Mohammad Azim Karami ◽  
Mehdi KHABIR ◽  
Hamzeh Alaibakhsh

ACS Nano ◽  
2021 ◽  
Vol 15 (9) ◽  
pp. 15362-15370
Author(s):  
Seongin Hong ◽  
Haewon Cho ◽  
Byung Ha Kang ◽  
Kyungho Park ◽  
Deji Akinwande ◽  
...  

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Seongin Hong ◽  
Nicolò Zagni ◽  
Sooho Choo ◽  
Na Liu ◽  
Seungho Baek ◽  
...  

AbstractVarious large-area growth methods for two-dimensional transition metal dichalcogenides have been developed recently for future electronic and photonic applications. However, they have not yet been employed for synthesizing active pixel image sensors. Here, we report on an active pixel image sensor array with a bilayer MoS2 film prepared via a two-step large-area growth method. The active pixel of image sensor is composed of 2D MoS2 switching transistors and 2D MoS2 phototransistors. The maximum photoresponsivity (Rph) of the bilayer MoS2 phototransistors in an 8 × 8 active pixel image sensor array is statistically measured as high as 119.16 A W−1. With the aid of computational modeling, we find that the main mechanism for the high Rph of the bilayer MoS2 phototransistor is a photo-gating effect by the holes trapped at subgap states. The image-sensing characteristics of the bilayer MoS2 active pixel image sensor array are successfully investigated using light stencil projection.


Author(s):  
Rikiya Takita ◽  
Wataru Nakamura ◽  
Akinori Kubota ◽  
Fumiki Nakano ◽  
Kazuhide Tomiyasu ◽  
...  

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Changsoon Choi ◽  
Juyoung Leem ◽  
Min Sung Kim ◽  
Amir Taqieddin ◽  
Chullhee Cho ◽  
...  

AbstractConventional imaging and recognition systems require an extensive amount of data storage, pre-processing, and chip-to-chip communications as well as aberration-proof light focusing with multiple lenses for recognizing an object from massive optical inputs. This is because separate chips (i.e., flat image sensor array, memory device, and CPU) in conjunction with complicated optics should capture, store, and process massive image information independently. In contrast, human vision employs a highly efficient imaging and recognition process. Here, inspired by the human visual recognition system, we present a novel imaging device for efficient image acquisition and data pre-processing by conferring the neuromorphic data processing function on a curved image sensor array. The curved neuromorphic image sensor array is based on a heterostructure of MoS2 and poly(1,3,5-trimethyl-1,3,5-trivinyl cyclotrisiloxane). The curved neuromorphic image sensor array features photon-triggered synaptic plasticity owing to its quasi-linear time-dependent photocurrent generation and prolonged photocurrent decay, originated from charge trapping in the MoS2-organic vertical stack. The curved neuromorphic image sensor array integrated with a plano-convex lens derives a pre-processed image from a set of noisy optical inputs without redundant data storage, processing, and communications as well as without complex optics. The proposed imaging device can substantially improve efficiency of the image acquisition and recognition process, a step forward to the next generation machine vision.


2020 ◽  
Vol 51 (1) ◽  
pp. 184-187
Author(s):  
Rikiya Takita ◽  
Wataru Nakamura ◽  
Akinori Kubota ◽  
Fumiki Nakano ◽  
Kazuhide Tomiyasu ◽  
...  

2020 ◽  
Vol 8 ◽  
pp. 116-121
Author(s):  
Shuoben Hou ◽  
Muhammad Shakir ◽  
Per-Erik Hellstrom ◽  
Bengt Gunnar Malm ◽  
Carl-Mikael Zetterling ◽  
...  

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