ZnO/PET-ITO柔性器件的构设与光电性能调控机理研究

项目名称： ZnO/PET-ITO柔性器件的构设与光电性能调控机理研究

项目编号： No.51502166

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 于琦

作者单位： 陕西理工大学

项目金额： 21万元

中文摘要： 基于聚对苯二甲酸乙二醇（PET）柔性衬底的ZnO纳米材料有望开辟柔性电子器件、光电子产品及电子集成技术应用的新浪潮，但其耐温性差、性能稳定性不足等问题亟需解决。铟锡氧化物（ITO）热膨胀系数与ZnO相近，具有较高的电导率和透过率，可提高ZnO/PET光电性能的同时大幅度增加其稳定性。本项目拟通过磁控溅射技术和水热法获得ZnO/PET-ITO复合材料，研究其形成机制并实现界面及结构的有效调控和优化设计，建立工艺-结构-性能之间的关联性；借助能带结构、态密度泛函及自由能等理论计算，探析ZnO/PET-ITO微观结构和晶格变化，同时建立制备ZnO/PET-ITO异质结方法及研究其光电机理；通过增大异质结电子空穴对与载流子浓度，提高ZnO/PET-ITO柔性器件的光电性能。本项目研究为国内柔性光电器件的设计与性能调控，以及器件效率的改善提供科学依据，从而更好地满足国家对新型柔性器件的需求。

中文关键词： 柔性衬底；透明导电薄膜；ZnO纳米结构；PET-ITO；光电性能

英文摘要： ZnO has attracted great attention due to its potential applications in the fields of ultraviolet laser，light-emitting device and transparent electrode. As a new light-weight flexible structural material, ZnO/PET has great potential applications in flexible electronic devices, high-quality optronics and electronic integration fields. However, the bottleneck problems including poor temperature resistance and stability limit the application. ITO has the similar thermal expansion to ZnO. The high conductivity and transmittance of ITO can enhance photoelectric property and stability of ZnO/PET. In this project, ZnO/PET-ITO composite structure has been fabricated by magnetron sputtering and hydrothermal technique. The formation mechanism of composite interface is revealed, so as to realize the effective control of composite interface and structure. The relationship between the processes, microstructure and properties of the composites has been discussed. By the calculations of band gap, density of states and free energy, the microstructure and lattice have been obtained. Meanwhile, ZnO/PET-ITO heterojunction has been fabricated and the photoelectric mechanism has been investigated. By increasing the electron hole pairs and carrier concentration, the photoelectric performance of ZnO/PET-ITO will be enhanced. This research will provide the scientific basis for performance of photoelectric device, and improvement of efficiency, which has a great potential to satisfy the demand of economy and social development for flexible photoelectric devices.

英文关键词： flexible substrate;transparent conduction oxide;ZnO nano-structure;PET-ITO;photoelectric property