Cd和ZnO合金化对ZnO能带结构和p型掺杂的影响和机制

项目名称： Cd和ZnO合金化对ZnO能带结构和p型掺杂的影响和机制

项目编号： No.11254001

项目类型： 专项基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 隋瑛锐

作者单位： 吉林师范大学

项目金额： 70万元

中文摘要： ZnO半导体被认为是制备紫外发光和激光二极管的理想材料，但由于其p型掺杂存在着受主掺杂浓度低和离化能高的关键科学问题没有解决，严重地阻碍了ZnO的应用和发展。本项目利用Cd与ZnO合金化对ZnO电子结构和热力学性能的影响，采取磁控溅射和热处理技术开展ZnO阱层材料ZnCdO薄膜及其p型掺杂的研究工作；研究ZnCdO晶体结构、晶体质量、禁带宽度和价带顶能级相对ZnO的带偏移随Cd含量的变化，以及这些变化对其光电学性能的影响规律和机制，探索可控生长高质量ZnCdO薄膜的方法和技术；开展Li，N掺杂p型ZnCdO的制备和光电性能的研究，结合第一原理计算，探讨Cd与ZnO合金化对受主掺杂浓度和离化能的影响规律和机制，以及与价带偏移的关联，制备高效、稳定的p型ZnCdO；设计和制备以p型ZnCdO为p层，n型ZnCdO为有源层的LED，探索制备激子复合为主、发光强度高和波长可调LED的方法和技术。

中文关键词： ZnCdO合金；p型掺杂；半导体薄膜；光电子器件；

英文摘要： ZnO semiconductor is considered to be an ideal material for the preparation of UV light-emitting and laser diodes,however, some key scientific issues of p-type doping are not resolved, such as the existence of low acceptor doping concentration and high ionization, which impedes seriously the application and development of ZnO.Utilizing the effect of Cd with ZnO alloying on electronic structure and thermodynamic properties of ZnO,this project will carry out the research work of ZnO well layer the material ZnCdO film and the p-type doping taking magnetron sputtering and heat treatment technology ;Study the changes of ZnCdO crystal structure, crystal quality, the band gap and the band offset of the valence band maximum level relative to the ZnO with the Cd content,as well as the effect regularity and mechanisms of these changes on its optical and electrical properties,explore the methods and techniques of controlled growth of the high quality ZnCdO film; Carry out the study of preparation and photoelectric properties of Li, N-doped p-type ZnCdO,combining with the first principles calculations, explore the effect regularity and mechanisms of Cd with ZnO alloying on the acceptor doping concentration and the ionization energy, as well as the association with the valence band offset, prepare high efficiency and stable

英文关键词： ZnCdO alloy；p-type doping；semiconductor thin film；photo-electronic device；