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- Title
Nonlinear solutions of PN junctions of piezoelectric semiconductors.
- Authors
Guo, MingKai; Li, Yuan; Qin, GuoShuai; Zhao, MingHao
- Abstract
A PN junction between two types of piezoelectric semiconductors (PSCs) is analyzed based on the fully coupled nonlinear equations of PSCs without any assumptions. A perturbation theory is employed to obtain the analytical solution of the considered nonlinear problem. A general solution to one-dimensional problems for PSCs is represented by a sum of a series of perturbation solutions. Typical properties including the electromechanical fields, built-in potential and the current–voltage characteristics of the piezoelectric PN junction are investigated for conditions of mechanical loading combined with a bias. The results reveal that the simplified linear (i.e., first-order perturbation) solution reported in the literature fails to describe the nonlinear characteristics, such as current–voltage characteristics of the piezoelectric PN junction, although it can give the electromechanical fields as well as concentrations of the electrons and holes near the interface of the PN junction for small carrier concentration perturbations. The presented nonlinear solution is valid and corresponds closely with the numerical solutions based on the commercial software COMSOL.
- Subjects
SEMICONDUCTOR junctions; CURRENT-voltage characteristics; CARRIER density; PERTURBATION theory; NONLINEAR equations; ELECTROMECHANICAL effects
- Publication
Acta Mechanica, 2019, Vol 230, Issue 5, p1825
- ISSN
0001-5970
- Publication type
Article
- DOI
10.1007/s00707-019-2361-1