TY - JOUR T1 - Mixed Layer Problem of a Three-Dimensional Drift-Diffusion Model for Semiconductors AU - Liu , Chundi AU - Wang , Shu AU - Xu , Wenqing JO - Journal of Partial Differential Equations VL - 3 SP - 264 EP - 280 PY - 2017 DA - 2017/08 SN - 30 DO - http://doi.org/10.4208/jpde.v30.n3.6 UR - https://global-sci.org/intro/article_detail/jpde/10469.html KW - Drift-diffusion model KW - quasineutral limit KW - mixed layer AB - The quasineutral limit and the mixed layer problem of a three-dimensional drift-diffusion model is discussed in this paper. For the Neumann boundaries and the general initial data, the quasineutral limit is proven rigorously with the help of the weighted energy method, the matched asymptotic expansion method of singular perturbation problem and the entropy production inequality.