A Physical TCAD Mobility Model of Amorphous In-Ga-Zn-O (a-IGZO) Devices with Spatially Varying Mobility Edges, Band-Tails, and Enhanced Low-Temperature Convergence

{“@id”:”/api/v1/downloads/2334″,”@type”:”Download”,”id”:2334,”title”:”A Physical TCAD Mobility Model of Amorphous In-Ga-Zn-O (a-IGZO) Devices with Spatially Varying Mobility Edges, Band-Tails, and Enhanced Low-Temperature Convergence”,”filename”:”Micromachines-2024_A-Physical-TCAD-Mobility-Model-of-Amorphous-In-Ga-Zn-O”,”abstract”:”Amorphous indium gallium zinc oxide (a-IGZO) is becoming an increasingly important technological material. Transport in this material is conceptualized as the heavy disorder of the material causing a conduction or mobility band-edge that randomly varies and undulates in space across the entire system. Thus, transport is envisioned as being dominated by percolation physics as carriers traverse this varying band-edge landscape of \u201chills\u201d and \u201cvalleys\u201d. It is then something of a missed opportunity to model such a system using only a compact approach\u2014despite this being the primary focus of the existing literature\u2014as such a system can easily be faithfully reproduced as a true microscopic TCAD model with a real physically varying potential. Thus, in this work, we develop such a \u201cmicroscopic\u201d TCAD model of a-IGZO and detail a number of key aspects of its implementation. We then demonstrate that it can accurately reproduce experimental results and consider the issue of the addition of non-conducting band-tail states in a numerically efficient manner. Finally, two short studies of 3D effects are undertaken to illustrate the utility of the model: specifically, the cases of variation effects as a function of device size and as a function of surface roughness scattering.”,”level”:null,”doi”:”10.3390/mi15070829″,”status”:”published”,”remarks”:null,”files”:[{“@type”:”File”,”id”:19224,”name”:”Micromachines-2024_A-Physical-TCAD-Mobility-Model-of-Amorphous-In-Ga-Zn-O.pdf”,”bytes”:8952868}],”tags”:[{“@id”:”/api/v1/download_tags/11″,”@type”:”DownloadTag”,”id”:11,”name”:”minimos”},{“@id”:”/api/v1/download_tags/20″,”@type”:”DownloadTag”,”id”:20,”name”:”publication”},{“@id”:”/api/v1/download_tags/69″,”@type”:”DownloadTag”,”id”:69,”name”:”tcad”},{“@id”:”/api/v1/download_tags/71″,”@type”:”DownloadTag”,”id”:71,”name”:”new materials”},{“@id”:”/api/v1/download_tags/100″,”@type”:”DownloadTag”,”id”:100,”name”:”dram”}],”date”:”2024-06-27T00:00:00+02:00″,”authors”:”M. Thesberg, F. Schanovsky, Y. Zhao, M. Karner, J.M. Gonzalez-Medina, Z. Stanojevi\u0107, A. Chasin, and G. Rzepa”}