Field emission device driven by self-powered contact-electrification: Simulation and experimental analysis
Field emission device driven by self-powered contact-electrification: Simulation and experimental analysis
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自供电接触起电驱动的场发射装置：仿真与实验分析
DOI：
10.1063/1.4931463
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发表时间：
2015
影响因子：
4
通讯作者：
Ou-Yang Wei
中科院分区：
文献类型：
--
作者：
Chen Xiangyu;Jiang Tao;Sun Zhuo;Ou-Yang Wei
介绍了一种由单电极摩擦电纳米发电机（TENG）驱动的自供电场发射器件（FED）。机械运动既作为驱动FED的电源，又作为调节发射电子量的控制单元。利用Fowler-Nordheim方程和Kirchhoff定律，建立了该自供电FED的理论模型，并对器件的实时输出特性进行了系统的研究。结果表明，TENG的运动距离控制FED的开启，决定发射电荷量，而运动速度则调节发射电流的幅值。TENG产生场发射的最小接触面积约为9 cm 2，通过优化FED结构和TENG摩擦材料可以提高接触面积。该自供电FED的概念论证和物理分析对FED在自供电电子器件等领域的进一步应用具有指导意义。
A self-powered field emission device (FED) driven by a single-electrode tribo-electric nanogenerator (TENG) is demonstrated. The mechanical motion works as both a power supply to drive the FED and a control unit to regulate the amount of emitted electrons. By using the Fowler-Nordheim equation and Kirchhoff laws, a theoretical model of this self-powered FED is proposed, and accordingly the real-time output characteristics of the device are systematically investigated. It is found that the motion distance of the TENG controls switch-on of the FED and determines the charge amount for emission, while the motion velocity regulates the amplitude of emission current. The minimum contact area for the TENG to generate field emission is about 9 cm2, which can be improved by optimizing FED structure and the tribo-materials of TENG. The demonstrated concept of this self-powered FED as well as the proposed physical analysis can serve as guidance for further applications of FED in such fields of self-powered electroni...