Effects of an attached functionally graded layer on the electromechanical behaviors of piezoelectric semiconductor fibers

Abstract In this paper, we propose a specific two-layer model consisting of functionally graded (FG) layer and piezoelectric semiconductor (PS) layer. Based on the macroscopic theory PS materials, effects brought about by attached FG piezotronic behaviors homogeneous n-type fibers PN junctions are investigated. The semi-analytical solutions electromechanical fields obtained expanding displacement carrier concentration variation into power series. Results show that antisymmetry potential electron distributions in is destroyed due to material inhomogeneity addition, creating jump discontinuities properties layer, barriers/wells can be produced middle fiber. Similarly, barrier configuration near interface junction also manipulated way, which offers new choice for design based devices.