Ejehi Faezeh, Shooshtari Leyla, Mohammadpour Raheleh, Asadian Elham, Sasanpour Pezhman
Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, 14588-89694, Iran.
Medical Nanotechnology and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Nanotechnology. 2022 Sep 7;33(47). doi: 10.1088/1361-6528/ac8a52.
Self-sufficient power sources provide a promising application of abundant electronic devices utilized in detection of ambient properties. Recently, triboelectric nanogenerators (TENGs) have been widely investigated to broaden the self-powered systems by converting the ambient mechanical agitations into electrical voltage and current. Graphene oxide (GO), not only for sensing applications but also as a brilliant energy-related nanomaterial, provides a wide range of controllable bandgap energies, as well as facile synthesis route. In this study, GO-based self-powered photodetectors have been fabricated by conflating the photosensitivity and triboelectric characteristics of freestanding GO paper. In this regard, photodetection via TENGs has been investigated in two forms of active and passive circuits for ultraviolet (UV) and visible illumination. The photodetector responsivity upon UV enhanced from 0.011 mA Wfor conventional GO-photoresistors up to 13.41 mA Wby active photodetection setup. Moreover, applying the active-TENG improved the efficiency from 0.25% (in passive TENG) to 4.21%. Our findings demonstrate that active TENGs might enable materials with insignificant optical response to represent considerably higher light-sensitivity by means of synergizing the effect of TENG output changes with opto-electronical properties of desired layers.
自给自足的电源为应用于环境特性检测的大量电子设备提供了一个有前景的应用方向。最近，摩擦纳米发电机（TENGs）已被广泛研究，通过将环境机械振动转化为电压和电流来拓宽自供电系统。氧化石墨烯（GO）不仅用于传感应用，而且作为一种出色的与能量相关的纳米材料，具有广泛的可控带隙能量以及简便的合成路线。在本研究中，通过融合独立GO纸的光敏性和摩擦电特性，制备了基于GO的自供电光电探测器。在这方面，已经针对紫外线（UV）和可见光照明，以有源和无源电路两种形式研究了通过TENGs进行的光电探测。通过有源光电探测装置，紫外光下光电探测器的响应度从传统GO光电阻的0.011 mA/W提高到了13.41 mA/W。此外，应用有源TENG将效率从0.25%（无源TENG）提高到了4.21%。我们的研究结果表明，有源TENGs可能使光学响应不显著的材料通过将TENG输出变化的效应与所需层的光电特性协同作用，表现出相当高的光灵敏度。
