Understanding the Links among Structure, Processing, and Electronic/Ionic Properties in Soft Mixed Conductors

了解软混合导体的结构、加工和电子/离子特性之间的联系

• 批准号: 1507826
• 负责人: Alberto Salleo
• 金额: $ 40.9万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507826&HistoricalAwards=false
• 关键词: Understanding; Links; among; Structure; Processing

Nontechnical Description: Mixed conductors, i.e., materials that have the ability to conduct electricity using both electrons and ions, have many potential applications. One of the most appealing areas on which these materials can have an impact is the interface between living matter, whose physiology operates via ion fluxes, and electronics, which operate by moving electrons. The goal of this research project is to provide an in-depth understanding of how the molecular structure of these materials and their processing conditions affect their ability to operate as transducers of ionic signals into electronic signals. Better knowledge of these materials could impact many areas of society, from the management of energy to human health. In addition to these broader benefits, educating students in this emerging area contributes to producing a trained workforce ready to develop materials and devices for the marketplace. Outreach efforts associated with this project involve a local high school with a large Latino population.Technical Description: Beyond organic electronic conductors, organic mixed conductors are a promising category of materials with potential applications in many areas, such as electrochemical cells and bioelectronics. Compared to the conventional conjugated polymers, mixed conductors have the added complexity of containing an ion-conducting phase. The interplay of the transport of the ion conducting and the electron conducting phase is at the heart of the operation of these materials. This project aims to establish the structure-property relationships in mixed conductors and to develop an in-depth understanding of how mixed conductors work. Specifically, the morphology of poly(3,4-ethylenedioxythiophene) (PEDOT)-based blends is widely tunable by changing the partner of PEDOT in the blend or by processing. The electrical characterization and modeling of the response of organic electrochemical transistors (OECT) allow the measurement of carrier mobility and the degree of entanglement of the ion conducting and electron conducting phase. Charge modulation spectroscopy is used to study the polaronic or bipolaronic nature of the carriers. Structural characterization, based on X-ray scattering and electron microscopy, is carried out to understand how morphology affects the functionality of mixed conductors. The project also plans to study new materials that integrate the ionic conduction functionality and the electronic conduction functionality in a single molecule.

非技术描述：混合导体，即具有使用电子和离子进行电力的能力的材料具有许多潜在的应用。这些材料可能产生影响的最吸引人的领域之一是生物学通过离子通量运行的生物与通过移动电子运行的电子产品之间的界面。该研究项目的目的是深入了解这些材料的分子结构及其处理条件如何影响其作为离子信号传感器运行到电子信号的能力。从能源管理到人类健康，对这些材料的更好了解可能会影响社会的许多领域。除了这些更广泛的好处外，对这个新兴地区的学生进行教育，还有助于生产一支训练有素的劳动力，准备为市场开发材料和设备。与该项目相关的外展工作涉及一所当地高中，有大量拉丁裔人口。技术描述：除了有机电子导体之外，有机混合导体是有希望的材料类别，在许多领域，例如电化学细胞和生物电子学。与常规的共轭聚合物相比，混合导体具有含有离子传导阶段的附加复杂性。离子导电和电子导电阶段的运输相互作用是这些材料运行的核心。该项目旨在在混合导体中建立结构性关系，并深入了解混合导体的工作方式。具体而言，通过更改PEDOT在混合物中或加工中更改PEDOT的合作伙伴，可以通过更改基于PEDOT的混合物（PEDOT）的混合物的形态。有机电化学晶体管（OECT）响应的电气表征和建模允许测量载体迁移率以及离子导电和电子导电阶段的纠缠程度。电荷调制光谱法用于研究载体的二极化或双极性质。基于X射线散射和电子显微镜的结构表征是为了了解形态如何影响混合导体的功能。该项目还计划研究整合单个分子中离子传导功能和电子传导功能的新材料。