Molecular design strategies for <scp>high‐performance</scp> organic electrochemical transistors

Li, Peiyun; Lei, Ting

doi:10.1002/pol.20210503

Cited by 46 publications

(30 citation statements)

References 77 publications

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“…In order to improve μ e,OECT , various strategies have been employed such as side-chain engineering and backbone structure optimization, [41][42][43][44]46,47] increasing polymer molecular weight, [48] lowering device contact resistance. [58] To this end, utilizing the rich library of electrondeficient building blocks, which have been successful in building a great number of high mobility n-type polymers for organic thin-film transistors (OTFTs), [59][60][61][62] is considered as an effective approach to construct n-type OECT materials.…”

Section: Introductionmentioning

confidence: 99%

Cyano‐Functionalized n‐Type Polymer with High Electron Mobility for High‐Performance Organic Electrochemical Transistors

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Cyano‐Functionalized n‐Type Polymer with High Electron Mobility for High‐Performance Organic Electrochemical Transistors

et al. 2022

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“…Over the past few years, polar and hydrophilic oligo ethylene glycol (OEG) side chains modified conjugated polymers as the channel layers have been developed rapidly, [14][15][16][17] particularly for p-type (hole transport) OECT devices with the μC* figure of merit up to ≈563 F V −1 cm −1 s −1 given by pgBTTT. [18][19][20][21] Whereas n-type OECTs are yet much more immature than…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Mixed Conduction in N‐type Fused Small Molecule Semiconductors

Duan

Zhu

Wang

et al. 2022

Adv Funct Materials

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Highly efficient mixed ionic and electronic conduction is critical to developing high‐performance organic electrochemical transistors (OECTs) devices. While currently, the n‐type small molecules mixed conductors design strategy remains extremely lacking. Herein, ethylene glycol (EG) chain substituted electron‐deficient naphthalene bis‐isatin and rhodanine acceptor units with easily accessible steps are rationally fused, affording fused and planar novel semiconductors with weak intramolecular S–O ‘conformation locks', where gNR with EG side chain and hgNR with hybrid alkyl‐EG side chain. The rigid, planar and highly electron‐deficient skeleton enables the resulting small molecule semiconductors to be efficient mixed ionic‐electronic conductors with very high OECT electron mobility up to 0.01 cm2 V−1 s−1. Remarkedly, gNR displays the record value of geometry‐normalized transconductance of 0.4 S cm−1 and μC* of 2.6 F V−1 cm−1 s−1, which can also be compared with the state‐of‐art n‐type semiconducting polymers in OECTs. Moreover, the effect of the alkyl spacer on the n‐type mixed ionic and electronic conduction features of the small molecule materials is investigated. The fused electron‐deficient acceptor‐acceptor (A–A) system with intramolecular conformation lock design strategy in this work provides a new avenue to realize next‐generation high‐performance small molecule mixed ionic and electronic conductors for OECT materials.

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“…To achieve accumulation mode devices, further treatments are required such as overoxidation of PEDOT:PSS or blending it with other semiconducting polymers such as poly(tetrabutylammonium 6-(thiophene-3-yl)hexane-1-sulfonate) (PTHS) . These CPs are also water-processible and must undergo additional post-treatment or cross-linking to ensure their stability in aqueous OECTs; cross-linking in particular decreases ionic mobility and hinders the crucial diffusion of ions in the channel . Given the lack of other PEDOT derivatives used in OECTs, there remains a clear opportunity to develop PEDOT-based channel materials for aqueous OECTs that operate at mild, biofriendly potentials and do not require additives or post-treatment.…”

Section: Introductionmentioning

confidence: 99%

A Phosphonated Poly(ethylenedioxythiophene) Derivative with Low Oxidation Potential for Energy-Efficient Bioelectronic Devices

et al. 2021

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Organic electrochemical transistors (OECTs) for bioelectronic applications require the design of conjugated polymers that are stable in aqueous environments and afford high energy efficiency and good performance in OECTs. Polymers based on poly(ethylenedioxythiophene) (PEDOT) are promising in this area due to their low oxidation potential and reversible redox, but they often require cross-linking to prevent dissolution and yield OECTs operating in the less efficient depletion mode. In this work, a new conjugated polymer PEDOT-Phos is presented, which combines a conjugated poly(ethylenedioxythiophene) (PEDOT) backbone with alkyl-protected phosphonate groups. PEDOT-Phos exhibits a low oxidation onset potential (−0.157 V vs Ag/AgCl) and its nanoporous morphology affords it a high volumetric capacitance (282 ± 62 F cm–3). Without any cross-linking, additives, or post-treatment, PEDOT-Phos can be used in aqueous OECTs with efficient accumulation mode operation, long-term stability when immersed in aqueous media, low threshold voltages (−0.161 ± 0.005 V), good transconductances (9.3 ± 1.8 mS), and ON/OFF current ratios (618 ± 54) comparable to other PEDOT-based materials in OECTs. These results highlight the great promise of PEDOT-Phos as a stand-alone channel material for energy-efficient, bioelectronic devices.

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Molecular design strategies for high‐performance organic electrochemical transistors

Cited by 46 publications

References 77 publications

Cyano‐Functionalized n‐Type Polymer with High Electron Mobility for High‐Performance Organic Electrochemical Transistors

Cyano‐Functionalized n‐Type Polymer with High Electron Mobility for High‐Performance Organic Electrochemical Transistors

Highly Efficient Mixed Conduction in N‐type Fused Small Molecule Semiconductors

A Phosphonated Poly(ethylenedioxythiophene) Derivative with Low Oxidation Potential for Energy-Efficient Bioelectronic Devices

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