顶发射AMOLED显示封装薄膜的设计与研制

Organic light emitting display (AMOLED) possessing excellent properties, such as high quality picture, ultra-thin and light weight, good for eyes, flexible or bending, attracts much attention in research and industry. And now it is applied in the field of moving wearable products. However, AMOLED based on organic/polymer materials faced the key problem is long time stability and hence resulting in low yields. The core problem influenced on the stability is that film flexible encapsulation methods does not make breaking through so far. To solve the problem of penetrated water and oxygen to destroy AMOLED properties, especially for flexible AMOLED using plastic substrates, which does not obstruct water and oxygen, is the main task for the application requirement. AMOLED properties are very sensitive to the water and oxygen, especially for the water, therefore, the project proposal will investigate the mechanism of thin film obstructing water and oxygen, film materials, and film fabrication technique, investigate stress of the encapsulated film, adhesiveness between the film with the substrates, and the encapsulated film or prepared technique influence on the performances of AMOLED, to understand novel encapsulation method and realize 20Khr long lifetime flexible AMOLED color display.

有机发光显示（AMOLED）以其高画质、超薄、护眼健康、柔性等优异特性赢得学界和业界的高度关注，并在可穿戴移动产品中颇具应用潜力。但是，对以有机功能材料为基础的柔性AMOLED高稳定性的要求导致其生产良率较低，稳定性一直是柔性AMOLED大规模应用的瓶颈，其中的关键问题是柔性薄膜封装方法的研究一直没有取得实质性突破。破解由于水氧渗透造成的AMOLED显示性能劣化的难题，一直都是封装科学和技术的核心任务，也是AMOLED新一代显示发展面临的迫切需求。AMOLED对水氧的过分敏感，远远超过其他类型的光电器件，因此，本申请课题拟深入研究超薄柔性薄膜隔绝水氧的物理和化学机制，从阻隔分子渗透角度研究薄膜材料、制备方法，探索封装薄膜的应力、附着性，以及薄膜制备工艺对AMOLED显示屏性能的影响规律，掌握柔性AMOLED显示屏先进的薄膜封装方法，实现2万小时以上的长寿命彩色柔性AMOLED显示。

有机发光显示（AMOLED）以其高画质、超薄、护眼健康、柔性等优异特性赢得学界和业界的高度关注，并在可穿戴移动产品中颇具应用潜力。但是，对以有机功能材料为基础的柔性AMOLED高稳定性的要求导致其生产良率较低，稳定性一直是柔性AMOLED大规模应用的瓶颈，其中的关键问题是柔性薄膜封装方法的研究一直没有取得实质性突破。针对实现长寿命柔性有机发光显示器件的关键科学问题（AMOLED），研究了柔性封装材料与工艺和机制。通过该项目的实施，发明了一类全无机交替薄膜材料与结构，并对薄膜的制备工艺进行探索，兼容真空制备工艺，满足生产线要求，解决了薄膜应力控制问题，表征完成了薄膜对水氧透过率性能，基本达到5x10-6g/m2/Day，基本满足了实际显示样品的需求，实现了寿命超过2万小时的柔性显示器件，具有较高的应用潜力。通过了解水氧分子透过薄膜的机制，重点解决了防止水氧分子的渗透薄膜的通道问题，该材料体系和薄膜制备工艺可用于制备长寿命柔性OLED显示屏。