摘要
The tribovoltaic nanogenerator(TVNG)has evolved in recent years as a novel type of nanogenerator designed to address the limitations of the standard triboelectric nanogenerator in terms of output signal and charge generation.Besides the outstanding characteristics,the tribovoltaic effect can also well be coupled with another effect to further boost the output performance.In this work,we proposed firstly a frictional heat-assisted performance enhancement in dynamic Schottky contact from the rubbing between n-type silver selenide(Ag_(2)Se)and aluminum.The chemical composition and physical characteristics of the Ag_(2)Se ceramic were analyzed using X-ray diffraction,scanning electron microscopy,and Synchrotron X-ray tomography techniques.UVeVis spectroscopy and UPS were also utilized in order to validate the semiconducting property of the n-type Ag_(2)Se ceramic.Moreover,the presence of the Schottky junction was demonstrated through the analysis of the current-bias voltage characteristic curve of the Ag_(2)Se/aluminum(Al)contact under varying stress and temperature conditions.The built-in electric field plays a crucial part in the tribovoltaic effect by efficiently transferring the excited carriers to an external load through sliding contact between Ag_(2)Se and Al.Demonstrating the synergy between tribovoltaic and thermoelectric effects becomes achievable through the excellent thermoelectric property of Ag_(2)Se.Herein,the proposed TVNG generated a peak output voltage and current of around 0.7 V and 24.8 nA,respectively,achieving a maximum output power of 12.6 nW at a load resistance of 10 kU.The influence of frictional heat on the output performance of the proposed TVNG was well demonstrated by the thermal-induced voltage and enhanced electrical output from continuous sliding.The concepts given in this study establish the basis for the progress of effective energy collection employing semiconducting materials and the advancement of flexible harvesting and sensing device development in the future.
基金
funded by King Mongkut’s University of Technology North Bangkok,Contract no.KMUTNB-67-KNOW-02
by National Science,Research and Innovation Fund(NSRF)
King Mongkut’s University of Technology North Bangkok(Project no.KMUTNBeFFe67-B-35)
supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)(2021R1C1C1011588).
