Molecular Layer Deposition (MLD) of CapturePhos - A Barrier for Flexible Electronics

这个为期2年的NSERC CRD项目旨在扩大一类新的磷基交联聚合物的实用性，膦烯聚合物网络“Capturephos”。 制备和评估本体聚合物的性质相对简单，但理解这些材料作为基底上的均匀涂层的潜力是完全未知的，需要重点研究。 新的应用需要新的合成方法，即利用聚合物中膦中心捕获氧的能力。这将使CapturPhos成为电子产品（通常称为“电子封装”）的有效封装材料。由于其坚固的交联性质和固有的柔韧性，CapturPhos是柔性电子产品的优秀屏障材料。为了完全整合，这种聚合物应该由气相制成并在目标表面组装。该研究团队将开展一项活动，以（i）制备独特的膦，目标是在所得聚合物膜中实现低蒸汽压和最大交联，并评估其适用于分子层沉积（MLD）工艺。 这也将包括对商业初级膦的调查;（ii）在MLD工艺中利用这些膦与聚烯烃反应伙伴来存款薄膜（iii）充分表征沉积的膜以评估厚度、均匀性和P含量;（iv）通过使用乙烯基羧酸的表面处理来促进选择性区域沉积（对于氧化物表面）和乙烯基卡宾（对于金属表面）（v）比较平坦的和选择性区域图案化的基底的总体O2吸收和O2透射性质。 这项工作的结果旨在为下一代柔性电子器件（有机发光二极管（OLED）;有机光致发光器件（OPV））开发一种新的阻隔涂层方法。 拟议的开发项目将在索尔维集团的两个全球业务部门--索尔维特种聚合物和Solvay-Cytec（Cytec Canada）--的支持下进行。

This 2-year NSERC CRD project aims to expand the utility of a new class of phosphorus-based crosslinked polymers, the phosphane-ene polymer network "Capturephos". Making and assessing the properties of the bulk polymer has been relatively straightforward but understanding the potential of these materials as an ultrathin, uniform coating on a substrate is completely unknown and requires a focused investigation. The new application, which requires a new synthesis method, is to use the ability of the phosphine centres in the polymer to capture oxygen. This will make CapturPhos an effective encapsulation material for electronics (typically called the "electronic package"). Due to its robust crosslinked nature and its inherent flexibility, CapturPhos is an excellent barrier material for flexible electronics. To integrate fully, this polymer should be made from the gas phase and assemble at a targeted surface. The research team will embark on a campaign to (i) Prepare unique phosphines targeting low vapour pressure and maximum crosslinking in a resulting polymer film and the assessment of their suitability molecular layer deposition (MLD) processes. This will also include a survey of commercially primary phosphines; (ii) Utilize these phosphines with polyolefin reaction partners in an MLD process to deposit thin films (10-100 nm) of CapturePhos; (iii) Fully characterize the deposited films to assess thickness, uniformity and P content; (iv) to promote selective area deposition with surface treatments using vinyl carboxylic acids (for oxide surfaces) and vinyl carbenes (for metal surfaces) (v) Compare flat and selective-area patterned substrates for their overall O2 uptake and O2 transmission properties. The results from this work aim to develop a new approach to barrier coatings for next generation, flexible electronic devices (Organic light emitting diodes (OLED); Organic photovoltaics (OPV)). The proposed development will be carried out with the support of two global business units within the Solvay Group, Solvay Specialty Polymers and Solvay-Cytec (Cytec Canada).