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本文根据在异质半导体材料中,载流子能量是位置函数这一特点,分别从玻尔兹曼传输方程和电动力学公式得出了对异质材料器件也适用的电流密度方程、连续性方程和泊松方程。除连续性方程与经典形式相同外,其余的均增加了新项。表明在异质材料中,影响载流子输运的作用力,除了传统的“电场漂移力”和“扩散力”外,还存在由于能带位置关系形成的“能场力”和由于态密度位置关系形成的“促扩力”。
According to the characteristic that the carrier energy is a function of position in heterogeneous semiconductor materials, the current density equation applicable to heterogeneous material devices is derived from the Boltzmann transmission equation and the electrodynamics formula respectively. The continuity equation And Poisson equation. Except that the continuity equation is the same as the classical one, all the others have added new items. It shows that in heterogeneous materials, the force that influences the transport of carriers, in addition to the traditional “electric field drift force” and “diffusion force”, there exist “energy field” due to the band position relationship and due to the density of states The relationship between the formation of the “promotion of expansion.”