Optical method for making spatially and temporally resolved measurements of the hole concentration in organic electrochemical transistors

J. Friedlein, S. Shaheen, R. McLeod
{"title":"Optical method for making spatially and temporally resolved measurements of the hole concentration in organic electrochemical transistors","authors":"J. Friedlein, S. Shaheen, R. McLeod","doi":"10.1117/12.2063564","DOIUrl":null,"url":null,"abstract":"Electrochemical reduction and oxidation of PEDOT:PSS are used to modulate the channel current in organic electrochemical transistors (OECTs). In addition to changing PEDOT conductivity over more than 4 orders of magnitude, these redox reactions cause a shift in the PEDOT:PSS absorption spectrum. In this work we have used this shift in the absorption spectrum to make spatially and temporally resolved measurements of the redox state of PEDOT:PSS. By applying these measurements to the PEDOT:PSS in an OECT channel, we have shown that the redox state of the PEDOT:PSS is not constant along the channel during transistor operation. Furthermore, we have shown that the time constant of the optical transition is significantly larger near the transistor source than it is near the transistor drain. These results are not considered in existing models of the OECT transient response, and they may lead to a better understanding of geometry-performance relationships in OECTs.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics & Photonics - Photonic Devices + Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.2063564","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

Electrochemical reduction and oxidation of PEDOT:PSS are used to modulate the channel current in organic electrochemical transistors (OECTs). In addition to changing PEDOT conductivity over more than 4 orders of magnitude, these redox reactions cause a shift in the PEDOT:PSS absorption spectrum. In this work we have used this shift in the absorption spectrum to make spatially and temporally resolved measurements of the redox state of PEDOT:PSS. By applying these measurements to the PEDOT:PSS in an OECT channel, we have shown that the redox state of the PEDOT:PSS is not constant along the channel during transistor operation. Furthermore, we have shown that the time constant of the optical transition is significantly larger near the transistor source than it is near the transistor drain. These results are not considered in existing models of the OECT transient response, and they may lead to a better understanding of geometry-performance relationships in OECTs.
对有机电化学晶体管中空穴浓度进行时空分辨测量的光学方法
利用PEDOT:PSS的电化学还原和氧化来调制有机电化学晶体管(OECTs)中的沟道电流。除了改变PEDOT的电导率超过4个数量级外,这些氧化还原反应还会引起PEDOT:PSS吸收光谱的变化。在这项工作中,我们利用吸收光谱的这种位移对PEDOT:PSS的氧化还原状态进行了空间和时间分辨测量。通过将这些测量应用于OECT通道中的PEDOT:PSS,我们已经表明,在晶体管工作期间,PEDOT:PSS的氧化还原状态在通道中不是恒定的。此外,我们已经表明,光跃迁的时间常数在晶体管源附近明显大于在晶体管漏极附近。这些结果在现有的OECT瞬态响应模型中没有被考虑,它们可能有助于更好地理解OECT的几何性能关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信