柔性显示基板材料研究进展

随着显示技术的不断发展，柔性显示以其质轻、可轻薄化、耐用和可收卷等优点，成为最具发展潜力的下一代显示技术. 柔性显示技术的实现除了要求现有的设计和制造工艺进行改进之外，更加对加工和使用过程中材料的性能提出了新的要求，其中，柔性基板作为柔性显示器件的重要组成部分，基板材料要求具有良好的光学透明度、柔韧性、热稳定性和阻水阻氧等特性，因此，开发出具有优异的综合性能的基板材料成为实现柔性显示的关键环节. 目前，可以作为柔性显示基板的材料包括聚合物基板、超薄玻璃基板、不锈钢基板、纸质基板和生物复合薄膜基板，以前3种最常用. 文中针对近年来柔性显示基板材料的研究状况，从光学透明度、热稳定性、机械性能、阻水阻氧性能和表面平坦性等方面对这5种基板材料的性能进行了比较，聚合物基板相较于超薄玻璃基板和不锈钢基板，不仅具有透明、柔性、质轻的优点，而且耐用性优良，被公认为具有非常广阔的应用前景，并对聚合物基板的研究进行了展望.

Research Progress in Materials for Flexible Display Substrate

With the continuous developments of display technology, flexible display is considered to be the potential next generation of display techniques due to their excellent properties such as light weight, thin, durability and roll. Implementation of the flexible display is dependent on not only the improvement of the existing manufacturing technology, but also the new design of satisfying materials. As a significant part of flexible display devices, the flexible substrate is crucial to flexible display and have drawn extensive attention, which is concentrated on the research of some essential properties to meet growing demands, such as optical transparency, flexibility, thermal stability, and water vapor and oxygen resistance. At present, five types of substrates are investigated for the flexible display, including polymer, ultra-thin glass, stainless steel, paper and bio-composite. Among these, the first three substrates are commonly used. This review shows recent research progress of available materials for flexible display substrates, and makes a comparison with these materials on optical transparency, thermal resistance, mechanical properties, and water vapor and oxygen resistance. Compared with ultra-thin glass and stainless steel, polymer substrates have advantages in transparency, flexibility, light weight and good durability. Finally, the future research direction of polymer substrate is presented.