多层次氧化亚铜/液晶复合体系的构筑与性能研究

Aiming at the urgent need for reducing power consumption and improving display quality in current liquid crystal panel industry of our country, in this project, we intend to dope Cu2O micro-nano materials (MNMs) into liquid crystals (LCs) by taking advantage of their distinctive physical and chemical properties that can influence the response of LCs under electric field, in order to develop a facile and effective method to mprove properties of LCs. By choosing nematic and cholesteric LCs as the research targets, this project will prepare multiple Cu2O MNMs and fabricate Cu2O MNMs/LCs composites. The electro-optical (E-O) characteristics of the liquid crystal molecules will be studied, and the interaction between Cu2O MNMs and LCs will be understood. We will study the effect of concentration, size and morphology of Cu2O MNMs on the E-O and alignment properties of LCs, focusing on the influence of facet effect, adsorption capacity and semiconductor effect. The direct rule of the Cu2O morphology and liquid crystal property will be revealed, and then in turn guide the design and synthesis of materials, trying to control the properties of LCs through the regulation of Cu2O microscopic structure. Based on above results, LC displays exhibiting excellent performance with low driving voltage will be fabricated. This project will provide a new idea and material for liquid crystal display and will be able to make the theory of the liquid crystal technology more completely, which is of great significance to develop future liquid crystal displays with high efficiency and low energy-consumption.

针对目前我国液晶面板产业降低液晶显示器功耗、提升显示效果的迫切需求，本课题拟将Cu2O微纳米材料掺杂进液晶中，利用其独特的物理化学性质影响液晶分子在电场下的响应行为，从而发展一种改善液晶性能的便捷有效的方法。本项目以向列相及胆甾相液晶为研究目标，制备多种Cu2O材料并构筑Cu2O材料/液晶复合体系；研究复合体系中液晶分子的电-光特性，认识Cu2O与液晶分子之间的相互作用关系；认识Cu2O的浓度、尺寸、形貌对液晶电-光及取向性能的影响规律；重点关注Cu2O的晶面效应、吸附性能及半导体效应对液晶性能的影响，揭示Cu2O的形貌结构与液晶性能间内在关系，反馈指导材料的设计和合成，力争通过对Cu2O微观结构的调控实现对液晶宏观性能的控制；在此基础上，制备性能优异的低压驱动液晶显示器件。本项目为液晶显示提供了全新的思路与材料，进一步完整了液晶技术理论，对于未来构建高效、低能耗的液晶显示器具有重要意义。

本项目合成了系列不同形貌的Cu2O、CuS、Mn3O4、CuInS2纳米材料并构筑了纳米材料/液晶复合体系，系统研究了纳米材料的微观结构对于液晶性能的影响。通过调控反应参数和实验条件，研究纳米材料生长动力学，揭示生长机理，实现了所需纳米材料的可控制备；将纳米材料均匀稳定分散在向列相、近晶相、胆甾相液晶中，构筑了组成与结构均一的纳米材料/液晶复合体系；研究了纳米材料的晶面效应、有序介孔结构、非晶态、规则的表面形貌对于液晶的光学、电-光及取向性能的影响规律，实现了液晶电-光性能的大幅提升和取向的精确调控；阐明了多种形貌的金属氧化物、金属硫化物等纳米材料对液晶的分子取向和电-光性能的调控机理，为未来设计与制备具有卓越电-光与取向性能的液晶显示器件奠定了基础。