Study on Nonlinear Dynamic Responses of the p–n GaN/AlN Heterojunction in Piezoelectric Semiconductor Composite Fibers

Abstract

In this study, a PN GaN/AlN heterojunction in a piezoelectric semiconductor composite fiber driven by dynamic magnetic loads is studied. The numerical results of nonlinear dynamic responses of a composite PN heterojunction subjected to a time‐harmonic magnetic load and a pulse magnetic load are obtained by the finite element method, respectively. The effect of different magnetic loads on the I‐V curve and piezoelectric behavior of a composite PN heterojunction are investigated. Numerical results show that when driven by uniformly dynamic magnetic loads, the electromechanical fields show a significant asymmetry due to the electric nonlinearity. The time‐harmonic magnetic loads drive the round‐trip motion of electrons and holes, and the dynamic electric behaviors driven by pulsed magnetic loads are nonlinear pulse motions. Further analysis of the PN heterojunction subjected to the bias voltage shows that positive magnetic loads increase the depletion layer’s width but decrease the carrier concentration. The results presented in this study have a referential significance to contactless performance tuning of a PSC heterojunction structure and new‐generation piezotronic devices.This article is protected by copyright. All rights reserved.