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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >A self-powered flexible vision electronic-skin for image recognition based on a pixel-addressable matrix of piezophototronic ZnO nanowire arrays
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A self-powered flexible vision electronic-skin for image recognition based on a pixel-addressable matrix of piezophototronic ZnO nanowire arrays

机译：一种自动柔性视觉电子皮肤，用于基于压电电型ZnO纳米线阵列的像素可寻址矩阵的图像识别

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摘要

The emerging electronic-skins (e-skins) are designed to mimic the comprehensive properties of human perception via flexible device techniques, and the achievement of a vision e-skin for image recognition is a highly interesting topic for applications in bionic organs and robots. In this paper, a new self-powered flexible vision e-skin has been realized from a pixel-addressable matrix of piezophototronic ZnO nanowire arrays. Under applied deformation, the e-skin can actively output piezoelectric voltage (piezoelectric effect), and the output piezoelectric voltage can be significantly influenced by UV illumination. The piezoelectric output can be regarded as both a photodetecting signal and electrical power for driving the device (no external power source is needed). The working mechanism is based on the optoelectronic/piezoelectric coupling effect (piezophototronic effect) of ZnO. The photo-generated carriers inside the ZnO nanowires can partially screen the piezoelectric field, affecting the piezoelectric output. The e-skin device has a 6 x 6 pixel-addressable matrix structure, and can map multi-point UV-stimuli through a multichannel data acquisition method, realizing image recognition. This new device structure and working mechanism may provoke a new research direction for the development of multi-functional e-skins.
机译：新兴的电子皮（电子皮肤）旨在通过灵活的装置技术模仿人类感知的综合性质，并且用于图像识别的视觉电子皮肤的实现是仿生器官和机器人中的应用的高度有趣的话题。在本文中，从压脉的ZnO纳米线阵列的像素可寻址矩阵实现了一种新的自给自足的柔性视觉E形皮肤。在施加变形下，E-Skin可以主动输出压电电压（压电效应），并且输出压电电压可能受UV照明的显着影响。压电输出可以被视为用于驱动装置的光电探测信号和电力（不需要外部电源）。工作机制基于ZnO的光电子/压电耦合效应（压氮电流效应）。 ZnO纳米线内的光产生的载流子可以部分地筛选压电场，影响压电输出。 E-SKED器件具有6×6像素可寻址的矩阵结构，并且可以通过多通道数据采集方法来映射多点UV-SIVELI，实现图像识别。这种新的设备结构和工作机制可能会为多功能电子皮肤的开发引起新的研究方向。

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