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Stable organic electrochemical neurons based on p-type and n-type ladder polymers
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. n Ink AB, Sweden.
Korea Univ, South Korea.
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
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2023 (English)In: Materials Horizons, ISSN 2051-6347, E-ISSN 2051-6355Article in journal (Refereed) Epub ahead of print
Abstract [en]

Organic electrochemical transistors (OECTs) are a rapidly advancing technology that plays a crucial role in the development of next-generation bioelectronic devices. Recent advances in p-type/n-type organic mixed ionic-electronic conductors (OMIECs) have enabled power-efficient complementary OECT technologies for various applications, such as chemical/biological sensing, large-scale logic gates, and neuromorphic computing. However, ensuring long-term operational stability remains a significant challenge that hinders their widespread adoption. While p-type OMIECs are generally more stable than n-type OMIECs, they still face limitations, especially during prolonged operations. Here, we demonstrate that simple methylation of the pyrrole-benzothiazine-based (PBBT) ladder polymer backbone results in stable and high-performance p-type OECTs. The methylated PBBT (PBBT-Me) exhibits a 25-fold increase in OECT mobility and an impressive 36-fold increase in & mu;C* (mobility x volumetric capacitance) compared to the non-methylated PBBT-H polymer. Combining the newly developed PBBT-Me with the ladder n-type poly(benzimidazobenzophenanthroline) (BBL), we developed complementary inverters with a record-high DC gain of 194 V V-1 and excellent stability. These state-of-the-art complementary inverters were used to demonstrate leaky integrate-and-fire type organic electrochemical neurons (LIF-OECNs) capable of biologically relevant firing frequencies of about 2 Hz and of operating continuously for up to 6.5 h. This achievement represents a significant improvement over previous results and holds great potential for developing stable bioelectronic circuits capable of in-sensor computing.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2023.
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-196662DOI: 10.1039/d3mh00858dISI: 001033204300001PubMedID: 37477499OAI: oai:DiVA.org:liu-196662DiVA, id: diva2:1789123
Note

Funding Agencies|Knut and Alice Wallenberg Foundation [2021.0058, 2022.0034]; Swedish Research Council [2020-03243, 2022-04053, 2022-04553]; European Commission [GA-964677]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoeping University [SFO-Mat-LiU 2009-00971]; National Research Foundation of Korea [2019R1A6A1A11044070, NRF2020M3H4A3081814]

Available from: 2023-08-18 Created: 2023-08-18 Last updated: 2023-09-12

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Wu, HanyanHuang, Jun-DaLiu, Tiefengvan der Pol, TomWang, QingqingStoeckel, Marc-AntoineLi, QifanFahlman, MatsTu, DeyuYang, ChiyuanFabiano, Simone
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