Probing Ion Injection in Organic Electrochemical Transistors

探测有机电化学晶体管中的离子注入

基本信息

批准号：
2003456
负责人：
David Ginger
金额：
$ 50.56万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-01 至 2023-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003456&HistoricalAwards=false
关键词：
Probing Ion Injection Organic Electrochemical

项目摘要

Plastics that can conduct both electrons and ions are important for numerous applications such as bioelectronic sensors that convert biological nerve impulses into signals readable by digital electronics, energy storage devices that can deliver high currents for short times, and next-generation computers that mimic the function of the brain. One of the factors limiting technological developments in these fields is limited understanding of how ions inject into and transport within these semiconducting plastics. This project addresses this question by analyzing polymers (plastics) at the nanometer scale using advanced microscopy techniques. These methods can determine where polymers are swelling from ion injection and can correlate that response with the chemical signature of the ion using infrared light, also at the nanoscale. The microscopic information is then compared to transistor measurements to gain a fundamental understanding of how the polymer processing and structure influences ion motion. The scientific knowledge from this project enables better design and processing/manufacturing of polymers for the applications noted above. The project additionally builds upon the track record of the principal investigator in education by enabling development of new outreach materials such as polymer electrochemistry kits that are suitable for integration into existing outreach programs and networks. The project also provides direct support for undergraduate research through continuation of the successful partnership with the Rainier Scholars organization to provide pathways to assist under-represented groups and first-generation college students succeed in the sciences. The scientific goal of this project is to gain a fundamental understanding of the structure/function relationships controlling ion injection in pi-conjugated polymers operating as mixed ionic/electronic conductors while using blended organic electrochemical transistors as an experimental testbed. These polymers and blends typically exhibit features on the scale of tens of nanometers, and therefore this project uses advanced scanning probe microscopy tools to investigate the ion transport process at the nanoscale. Conjugated polymers have emerged as promising electronic and photonic materials for transducing signals at the interface between the biological and digital environments, and the proposed project will explore fundamental structure/function properties of these materials relevant to these applications in a way that is distinct from other efforts through a combination of unique local and bulk methods. Specifically, the project will: 1) use a new method, photoinduced force microscopy (PiFM), to make nanoscale maps probing how local chemical structure and morphology combine to affect local ion injection; 2) apply electrochemical strain microscopy (ESM) to measure local swelling due to ion uptake in homopolymers, block copolymers, and blends; and, 3) do so while exploring new blend and composite architectures as a means to overcome the bottlenecks of existing materials performance. Notably, this project uses nanoscale infrared microscopy to probe blends of conducting polymers and ionic conductors to test the hypothesis that decoupling the high electronic mobility component and high ionic mobility component can enable improved electrochemical transistors. The principal investigator has shown in previous work that ion injection and electronic mobility are often anti-correlated in mixed conductors, which serves as a device bottleneck. These experiments yield a distinct set of measurements that enable multimodal analysis of the structure-function relationships underpinning ion injection. The project provides important insight into how mobility and volumetric capacitance in mixed ionic-electronic conductors are related, and whether it is possible to rationally improve conducting polymers and polymer blends design by focusing on how ions move into the polymer from the ground up.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

可以同时进行电子和离子的塑料对于众多应用很重要，例如将生物神经冲动转换为可通过数字电子设备可读的信号，可以在短时间内提供高电流的能量存储设备的信号，以及模仿大脑功能的下一代计算机。限制这些领域技术发展的因素之一是对离子如何在这些半导体塑料中注入和运输的理解有限。该项目通过使用高级显微镜技术在纳米尺度上分析聚合物（塑料）来解决这个问题。这些方法可以确定聚合物从离子注射中膨胀的位置，并且可以使用红外光（也可以在纳米级）与离子的化学特征相关联。然后将微观信息与晶体管测量值进行比较，以获得对聚合物处理和结构如何影响离子运动的基本了解。该项目的科学知识可以为上述应用程序更好地设计和处理/制造聚合物。该项目还基于教育主要研究者的往绩，通过开发新的外展材料（例如聚合物电化学套件），这些材料适合集成到现有的外展计划和网络中。该项目还通过与雷尼尔学者组织（Rainier Scholars）组织成功合作，为本科研究提供直接支持，以提供帮助不足的群体和第一代大学生在科学领域取得成功的途径。该项目的科学目标是对控制与混合离子/电子导体的PI结合聚合物中控制离子注入的结构/功能关系有基本的了解，同时将混合有机电化学晶体管作为实验测试台。这些聚合物和混合物通常在数十纳米的尺度上表现出特征，因此该项目使用先进的扫描探针显微镜工具来研究纳米级的离子传输过程。共轭聚合物已成为有前途的电子和光子材料，用于在生物和数字环境之间的界面上传输信号，而拟议的项目将探索这些材料的基本结构/功能特性，以与这些应用相关的方式，以与其他局部局部和实体方法的组合不同。具体而言，该项目将：1）使用一种新方法，即光诱导的力显微镜（PIFM），以使纳米级图探测局部化学结构和形态如何结合起来影响局部离子注射； 2）应用电化学应变显微镜（ESM），以测量由于均聚物，阻断共聚物和混合物的离子摄取而引起的局部肿胀； 3）在探索新的混合和复合体系结构时这样做，以此来克服现有材料性能的瓶颈。值得注意的是，该项目使用纳米级红外显微镜来探测导电聚合物和离子导体的混合物，以测试将高电子迁移率分量和高离子迁移率分量与高离子迁移率分量解耦的假设可以启用改进的电化学跨晶体管。主要研究者在先前的工作中表明，在混合导体中，离子注射和电子迁移率通常是抗相关的，后者用作设备瓶颈。这些实验产生了一组独特的测量值，使得能够对基于离子注射的结构功能关系的多模式分析。该项目提供了有关混合离子电子导体中的活动能力和体积电容如何相关的重要见解，以及是否有可能通过关注离子从地面上转移到聚合物中的范围来进行理性的奖励，这表明NSF的法定任务和范围是在宽阔的范围内，是否有可能在理性地改善指导聚合物的范围。标准。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Impact of varying side chain structure on organic electrochemical transistor performance: a series of oligoethylene glycol-substituted polythiophenes

不同侧链结构对有机电化学晶体管性能的影响：一系列低聚乙二醇取代的聚噻吩

DOI：
10.1039/d2ta00683a
发表时间：
2022
期刊：
Journal of Materials Chemistry A
影响因子：
11.9
作者：
Chen, Shinya E.;Flagg, Lucas Q.;Onorato, Jonathan W.;Richter, Lee J.;Guo, Jiajie;Luscombe, Christine K.;Ginger, David S.
通讯作者：
Ginger, David S.

Hydration of a Side-Chain-Free n-Type Semiconducting Ladder Polymer Driven by Electrochemical Doping