GRAVIA - Contiguous graphene ultra-barrier films for flexible electronic applications

该项目将研究以MOCON测试格式生产用于下一代柔性OLED和塑料逻辑显示器应用的非常高质量的阻挡层的可行性。这些薄膜使用高质量的CVD石墨烯和原子层沉积(ALD)非晶氧化铝的自愈层，具有超低的水蒸气传输率(WVTR)，每天低于1×10-5g/m2。这项工作将探索必要的工业工艺参数，以确保为所选的高端应用提供最低阻隔性能的最低价格点。然后，这些聚合物支持的阻隔膜将在WVTR和机械弯曲测试中与现有的阻隔涂层进行基准比较。这些测量也将由国家物理实验室(NPL)进行追踪，以确保数据正确，并可以进行有意义的比较。工业创新的挑战将是生产这种完全灵活、自愈合(连续)的光学透明薄膜，面积为25 cm2(超出当前技术水平4 cm2)，并以几乎没有可接受的缺陷的方式确保超高阻挡性能。该项目将使用先进的表征方法和质量控制分析来确保胶片的迭代开发，从可行性研究中获得的结果将用于模拟和预测未来更大的胶片系统，还将在可能的情况下由寻找障碍的最终用户和通过联合KTN活动来开发，以针对这些社区。

The project will investigate the feasbility of producing very high quality barrier films in MOCON test formats for nextgeneration flexible OLED and plastic logic display applications.These exhibit ultra low water vapour transfer rates (WVTR)of less than 1 X 10-5 g/m2 per day using self healing layers of high quality CVD graphene and Atomic Layer Deposited(ALD) amorphous alumina. The work will explore the neccessary industrial process parameters to ensure the lowest pricepoint at which the minimum barrier properties can be delivered for the chosen high end application. These resultantpolymer supported barrier films will then be benchmarked against existing barrier coatings in WVTR and mechanical flextests. These measurements will also be made traceable by the National Physical Laboratory (NPL) to ensure that the dataclaims are correct and meaningful comparisons can be made. The industrial innovation challenge will be producing thisfully flexible, self-healed (contiguous), optically transparent film of 25cm2 (beyond the current state of art 4cm2) in a timelymanner with very few acceptable defects to ensure ultra-barrier performance. The project will utilise advancedcharacterisation metrologies and quality control analysis to ensure the iterative development of the films and the resultantunderstanding gained from the feasibility studies will be used to model and anticipate future larger film systems and willalso be exploitated where possible by barrier seeking end users and through joint KTN activities to target thesecommunities.