Printed Organic Layers for Integrated Electronics: controlling processing to achieve stability and reproducibility

该计划的目的是证明在大面积上可靠地沉积溶液处理的电子材料，以获得稳定的器件性能，并允许集成机械灵活的传感系统组件。该计划将研究在设备制造的每个步骤获得稳定性的方法：油墨配方，油墨沉积，溶剂去除，薄膜形态和设备电稳定性。 其智力价值是证明了印刷柔性电子产品的可靠和稳定制造。该计划将解决印刷电子最具挑战性的两个方面：多层的可靠沉积和设备到设备的变化。将开发一种用于将半导体聚合物作为纳米颗粒分散体悬浮在水中的方法，并且因此允许从具有高界面质量的良性溶剂进行层对层沉积。器件的稳定性和可靠性将在两种类型的结构进行研究;光电二极管和薄膜晶体管。更广泛的影响是对使用印刷的材料加工和设备制造的基本理解的贡献。在大的柔性区域上开发可靠的印刷条件的目标适用于一系列基于有机材料的电子设备和传感器。从水性纳米粒子分散体加工有机材料的方法将能够证明从溶液中精确沉积多个聚合物层。PI参与了几个外展计划，为高中教师和学生提供研究经验。在该计划中，将开发简单的印刷电子设备，并将其与现有的教育计划相结合，以丰富大学预科教育。

The objective of this program is to demonstrate reliable deposition of solution processed electronic materials over large areas in order to obtain stable device performance and allow integration of components of sensing systems that are mechanically flexible. The program will investigate methods of obtaining stability at every step of device fabrication: ink formulation, ink deposition, solvent removal, thin film morphology and device electrical stability. The intellectual merit is the demonstration of reliable and stable fabrication of printed flexible electronics. The program will address two of the most challenging aspects of printing electronics: reliable deposition of multi-layers and device-to-device variations. A process for suspending semiconducting polymers as nanoparticle dispersions in water will be developed and as a consequence allow layer-to-layer deposition from benign solvents with high interfacial quality. Device stability and reliability will be studied in two types of structures; photodiodes and thin film transistors. The broader impacts are contributions to the fundamental understanding of materials processing and device fabrication using printing. The goal of developing reliable printing conditions over large flexible areas is applicable to a range of electronic devices and sensors based on organic materials. The approach of processing organic materials from aqueous nanoparticle dispersion will enable the demonstration of precise deposition of multiple polymer layers from solution. The PI is engaged with several outreach programs that offer research experiences to high school teachers and students. Within this program, simple printed electronic devices will be developed and integrated with existing educational programs targeting the enrichment of pre-college education.