On The Effective Polarization Charges In Theextension Of A Piezoelectric Semiconductor Fiber With A Pn Junction

We study the extension of a piezoelectric semiconductor (PS) fiber containing a PN junction, focusing on the effective polarization charges which are fundamental to piezotronics. A one-dimensional model derived previously from the macroscopic theory of PSs is used for a linear theoretical and nonlinear numerical analysis by COMSOL. Both homogeneous and heterogeneous junctions are studied. In addition to the built-in electric potential and field as well as I-V curve, distributed effective polarization charge along the fiber and concentrated effective polarization charge on the junction interface are calculated and examined.