A WKB solution of excess carriers in conductivity modulation base with non-uniform lifetime
非均匀寿命分布电导调制基区中非平衡载流子的WKB解

Base on the establishment of an ambipolar transport equation of conductivity modulation base with non-uniform lifetime, WKB solutions of excess carrier profiles under different boundary conditions have been obtained by using Liouville-Green transform. The results can be used in modeling of conductivity modulation power devices under localized lifetime control.