Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors
The ability to operate in aqueous environments makes poly(3,4-ethylenedioxyt hiophene):poly(styrenesulfonate), PEDOT:PSS, based organic electrochemical transistors (OECTs) excellent candidates for a variety of biological applications. Current research in PEDOT:PSS based OECTs is primarily focused on...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/156802 |
| _version_ | 1811680193330282496 |
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| author | Wu, Xihu Stephen, Meera Hidalgo, Tania C. Salim, Teddy Surgailis, Jokubas Surendran, Abhijith Su, Xiaoqian Li, Ting Inal, Sahika Leong, Wei Lin |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wu, Xihu Stephen, Meera Hidalgo, Tania C. Salim, Teddy Surgailis, Jokubas Surendran, Abhijith Su, Xiaoqian Li, Ting Inal, Sahika Leong, Wei Lin |
| author_sort | Wu, Xihu |
| collection | NTU |
| description | The ability to operate in aqueous environments makes poly(3,4-ethylenedioxyt hiophene):poly(styrenesulfonate), PEDOT:PSS, based organic electrochemical transistors (OECTs) excellent candidates for a variety of biological applications. Current research in PEDOT:PSS based OECTs is primarily focused on improving the conductivity of PEDOT:PSS film to achieve high transconductance (gm). The improved conductivity and electronic transport are attributed to the formation of enlarged PEDOT-rich domains and shorter PEDOT stacking, but such a change in morphology sacrifices the ionic transport and, therefore, the doping/de-doping process. Additionally, little is known about the effect of such morphology changes on the gate bias that makes the maximum gm ( P Peea ak kV G G ), threshold voltage (VT), and transient behavior of PEDOT:PSS based OECTs. Here, the molecular packing and nanostructure of PEDOT:PSS films are tuned using ionic liquids as additives, namely, 1-Ethyl-3-methylimidazolium (EMIM) as cation and anions of chloride (Cl), trifluoromethanesulfonate (OTF), bis(trifluoromethylsulfonyl)imide (TFSI), and tricyanomethanide (TCM). It is demonstrated that an optimal morphology is realized using EMIM OTF ionic liquids that generate smaller fibril-like PEDOT-rich domains with relatively loose structures. Such optimal morphology improves ion accessibility, lowering the gate bias required to completely de-dope the channel, and thus enabling to achieve high transconductance, fast transient response, and at lower gate bias window simultaneously. |
| first_indexed | 2024-10-01T03:21:09Z |
| format | Journal Article |
| id | ntu-10356/156802 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:21:09Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1568022022-05-01T02:46:47Z Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors Wu, Xihu Stephen, Meera Hidalgo, Tania C. Salim, Teddy Surgailis, Jokubas Surendran, Abhijith Su, Xiaoqian Li, Ting Inal, Sahika Leong, Wei Lin School of Electrical and Electronic Engineering School of Materials Science and Engineering Engineering::Electrical and electronic engineering Engineering::Materials::Organic/Polymer electronics Organic Electrochemical Transistors Doping The ability to operate in aqueous environments makes poly(3,4-ethylenedioxyt hiophene):poly(styrenesulfonate), PEDOT:PSS, based organic electrochemical transistors (OECTs) excellent candidates for a variety of biological applications. Current research in PEDOT:PSS based OECTs is primarily focused on improving the conductivity of PEDOT:PSS film to achieve high transconductance (gm). The improved conductivity and electronic transport are attributed to the formation of enlarged PEDOT-rich domains and shorter PEDOT stacking, but such a change in morphology sacrifices the ionic transport and, therefore, the doping/de-doping process. Additionally, little is known about the effect of such morphology changes on the gate bias that makes the maximum gm ( P Peea ak kV G G ), threshold voltage (VT), and transient behavior of PEDOT:PSS based OECTs. Here, the molecular packing and nanostructure of PEDOT:PSS films are tuned using ionic liquids as additives, namely, 1-Ethyl-3-methylimidazolium (EMIM) as cation and anions of chloride (Cl), trifluoromethanesulfonate (OTF), bis(trifluoromethylsulfonyl)imide (TFSI), and tricyanomethanide (TCM). It is demonstrated that an optimal morphology is realized using EMIM OTF ionic liquids that generate smaller fibril-like PEDOT-rich domains with relatively loose structures. Such optimal morphology improves ion accessibility, lowering the gate bias required to completely de-dope the channel, and thus enabling to achieve high transconductance, fast transient response, and at lower gate bias window simultaneously. Ministry of Education (MOE) Submitted/Accepted version This research was supported primarily by Ministry of Education (MOE) under AcRF Tier 2 grants (2018-T2-1-075 and 2019-T2-2-106) and National Robotics Programme (W1925d0106). J. S., T.C.H., and S.I. acknowledge support from the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2019-CRG8-4073–4095. 2022-04-25T07:04:10Z 2022-04-25T07:04:10Z 2022 Journal Article Wu, X., Stephen, M., Hidalgo, T. C., Salim, T., Surgailis, J., Surendran, A., Su, X., Li, T., Inal, S. & Leong, W. L. (2022). Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors. Advanced Functional Materials, 32(1), 2108510-. https://dx.doi.org/10.1002/adfm.202108510 1616-301X https://hdl.handle.net/10356/156802 10.1002/adfm.202108510 1 32 2108510 en 2018-T2-1-075 2019-T2-2-106 W1925d0106 Advanced Functional Materials This is the peer reviewed version of the following article: Wu, X., Stephen, M., Hidalgo, T. C., Salim, T., Surgailis, J., Surendran, A., Su, X., Li, T., Inal, S. & Leong, W. L. (2022). Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors. Advanced Functional Materials, 32(1), 2108510-, which has been published in final form at https://doi.org/10.1002/adfm.202108510. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Engineering::Materials::Organic/Polymer electronics Organic Electrochemical Transistors Doping Wu, Xihu Stephen, Meera Hidalgo, Tania C. Salim, Teddy Surgailis, Jokubas Surendran, Abhijith Su, Xiaoqian Li, Ting Inal, Sahika Leong, Wei Lin Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title | Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title_full | Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title_fullStr | Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title_full_unstemmed | Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title_short | Ionic-liquid induced morphology tuning of PEDOT:PSS for high performance organic electrochemical transistors |
| title_sort | ionic liquid induced morphology tuning of pedot pss for high performance organic electrochemical transistors |
| topic | Engineering::Electrical and electronic engineering Engineering::Materials::Organic/Polymer electronics Organic Electrochemical Transistors Doping |
| url | https://hdl.handle.net/10356/156802 |
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