摩擦电效应
材料科学
钙钛矿(结构)
纳米发生器
电介质
兴奋剂
接触带电
纳米技术
光电子学
化学工程
压电
复合材料
工程类
作者
Jian Du,Xiya Yang,Jialong Duan,Yudi Wang,Qunwei Tang
出处
期刊:Nano Energy
[Elsevier]
日期:2020-04-01
卷期号:70: 104514-104514
被引量:43
标识
DOI:10.1016/j.nanoen.2020.104514
摘要
Triboelectric nanogenerators (TENGs) have attracted considerable interests because of their high conversion efficiency from low-frequent mechanical energy to electricity. Robust dielectric materials are critical in enhancing the contact electrification charge density of TENGs. Herein, all-inorganic cesium lead halide (CsPbX3, X = I, Br, Cl) perovskites with tunable morphologies and dielectric properties are synthesized through a facile solvent etching method and applied as the triboelectric materials in perovskite TENGs. The influences of effective contact area and the dielectric properties associated with electron donating capacity of perovskite films are systematically investigated through solvent and compositional engineering. Compared with the all-inorganic perovskite free of etching, the crystal growth conditions are well controlled. In addition, the doping of Cl− or I− ions is in favor of regulating the polarity and electronic structure of the [PbBr6]4- octahedral. Benefitting from the physical surface engineering approaches for enhancing the triboelectric charge density and the chemical doping for regulating dielectric property, an open-circuit voltage of 192 V, a short-circuit current of 16.7 μA and maximum power density of 1.2 W m−2 at a contact frequency of 0.5 Hz are achieved in the champion CsPbBr2.6I0.4 TENG. The discovery of extraordinary dielectric behavior of the perovskite halides may pave the way of perovskite TENGs with boosting triboelectric charge density for mechanical energy harvesting.
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