论文部分内容阅读
Ultra-stable piezoelectric nanogenerator (PENG) driven by environ-mental actuation sources with all-weather service capability is highly desirable.Here,the PENG based on N doped 4H-SiC nanohole arrays (NHAs) is proposed to harvest ambient energy under low/high temperature and relative humidity (RH)conditions.Finite element method simulation of N doped 4H-SiC NHAs in com-pression mode is developed to evaluate the relationship between nanohole diameter and piezoelectric performance.The density of short circuit current of the assembled PENG reaches 313 nA cm-2,which is 1.57 times the output of PENG based on N doped 4H-SiC nanowire arrays.The enhancement can be attributed to the exist-ence of nanohole sidewalls in NHAs.All-weather service capability of the PENG is verified after being treated at-80/80 ℃ and 0％/100％ RH for 50 days.The PENG is promising to be widely used in practice worldwide to harvest biomechanical energy and mechanical energy.