纳米发生器
压电
材料科学
能量收集
异质结
制作
光电子学
纳米技术
电压
能量(信号处理)
电气工程
复合材料
替代医学
数学
病理
统计
医学
工程类
作者
Dipten Bhattacharya,Shubhrasish Mukherjee,Rajib Kumar Mitra,S. K. Ray
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2023-08-08
卷期号:34 (43): 435401-435401
被引量:1
标识
DOI:10.1088/1361-6528/ace97d
摘要
In addition to the superior electrical and optoelectronic attributes, ultrathin two-dimensional transition metal dichalcogenides (TMDCs) have evoked appreciable attention for their piezoelectric properties. In this study, we report, the piezoelectric characteristics of large area, chemically exfoliated TMDCs and their heterostructures for the first time, as verified by piezoelectric force microscopy measurements. Piezoelectric output voltage response of the MoS2-WSe2heterostructure piezoelectric nanogenerator (PENG) is enhanced by ∼47.5% if compared with WSe2and ∼29% if compared to MoS2PENG, attributed to large band offset induced by heterojunction formation. This allows the scalable fabrication of self-powered energy harvesting PENGs, which can overcome the various shortcomings of complicated synthesis processes, complex fabrication steps, low yield, and poor stability. The fabricated flexible, self-powered MoS2-WSe2heterostructure nanogenerator exhibits piezoelectric output ∼46 mV under a strain of ∼0.66% yielding a power output ∼12.3 nW, which offers better performance than other two-dimensional material based piezoelectric devices and also reveals the ability of bio-mechanical energy harvesting. This cost effective approach to fabricate eco-friendly MoS2-WSe2based fatigue free, superior performance piezoelectric-nanogenerators can be utilized to evolve flexible energy harvesting devices and may also be attractive as a self-powered, smart wearable sensor devices.
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