Identifying orthogonal solvents for solution processed organic transistors

Gaikwad, Abhinav M.; Khan, Yasser; Ostfeld, Aminy E.; Pandya, Shishir; Abraham, Sameer Y.; Arias, Ana Claudia

doi:10.1016/j.orgel.2015.12.008

Cited by 94 publications

(74 citation statements)

References 47 publications

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“…41). It is energetically favourable for photogenerated holes in the highest occupied molecular orbital (HOMO) of PCDTBT to enter DNTT, while electrons are trapped in PC 71 BM due to the high lowest unoccupied molecular orbital (LUMO) of DNTT.…”

Section: Resultsmentioning

confidence: 99%

Charge-integrating organic heterojunction phototransistors for wide-dynamic-range image sensors

2017

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Section: Resultsmentioning

confidence: 99%

Charge-integrating organic heterojunction phototransistors for wide-dynamic-range image sensors

2017

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“…[25] If it is p-doped or electrochemically oxidized, it can form highly conductive polaronic and/or bipolaronic states with conductivities of up to 1000 S cm −1 . [28] As is demonstrated in Table 1, the relative energy distance (RED) between PBTTT and water is significantly larger than 1 (see Supporting Information for a more detailed explanation). A simple analysis of the Hansen solubility parameter space using parameters extracted by Gaikwad et al further confirms this observation.…”

mentioning

confidence: 89%

A Universal Platform for Fabricating Organic Electrochemical Devices

Duong

Tuchman

Chakthranont

et al. 2018

Adv Elect Materials

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cost-effectively processed at room temperature, and to volumetrically uptake large amounts of electrolytes, OEDs have recently garnered much interest for applications in bioelectronics. [1][2][3] These include biosensing, energy storage, neural recording, and stimulation, [4,5] drug delivery, [6] and electroceuticals [7] to name a few. Out of the many available architectures, a device of choice that has been heavily investigated in recent years is the organic electrochemical transistor (OECT). In a typical OECT device, the conductivity of a polymer channel, which is probed by a set of source and drain electrodes, is actively controlled by varying the voltage applied between the channel and a third gate electrode both of which reside in the same electrolyte solution. The choice for gate materials, channel materials, electrolyte solutions, and device dimensions can all be designed to obtain desired device characteristics. Thin photolithographically defined devices, for instance, are favored for high speed (>1 kHz) operation whereas large devices with thick polymer channels are more often chosen for their high transconductance. [8][9][10] In general, OECTs operate at relatively low voltages (<1 V) that are suitable for aqueous environments and biological tissues, and have been successfully used to monitor the integrity of barrier tissues, [11,12] in vitro glucose concentrations [13,14] and in vivo neural activities. [15] In OECTs, ions penetrate the whole polymer film, as facilitated by the swelling processes induced by the solvent. While such process is not strictly necessary, as ionic liquids have been shown to also induce transistor-like behavior in conjugated polymers, [16,17] compared to ionic liquid-gated devices, OECTs provide the opportunity to decouple ionic transport, through swelling caused by the electrolyte solvent, from the ability of the ions to generate mobile charges in the polymer.Despite recent advances in device fabrication and materials development, however, only a select few polymers have been found to stably operate as active OECT channels in aqueous environments. Current state-of-the-art OECTs are fabricated using the highly conductive mixture of poly(3,4ethylenedioythiophene) doped with poly(styrene sulphonate) (PEDOT:PSS). [8] While this materials blend exhibits high transconductance and good stability, the details of the chemical composition are often unknown due to the proprietary nature A general method and accompanying guidelines for fabricating both nonaqueous and aqueous based organic electrochemical devices (OECTs) using water-insoluble hydrophobic semiconducting polymers are presented. By taking advantage of the interactions of semiconducting polymers in certain organic solvents and the formation of a stable liquid-liquid interface between such solvents and water, OECTs with high transconductance, ON/OFF ratios of up to 10 6 , and enhancements in stability are successfully fabricated. Additionally, key fundamental properties are extracted of both the device and the active channel ma...

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“…'A'judicious'choice'of'the'solvent'is'needed'in'order'to'avoid' that'the'solvent'of'a'polymer'is'going'to'dissolve'the'other,'already'deposited,'polymer'during' the'spin'coating'fabrication. 'Thus,'a'solvent'is'orthogonal'when'is'a'nonJsolvent'for'a'specific' polymer' [133]. 'In'literature'couples'of'polymers,'with'corresponding'orthogonal'solvents'are' reported.'A'very'interesting'example'is'reported'by'Komikado'et'al.'…”

Section: Number Of Bilayersmentioning

confidence: 99%