A photolithographic stretchable transparent electrode for an all-solution-processed fully transparent conformal organic transistor array

Cui, Nan; Tang, Qingxin; Ren, Hang; Zhao, Xiaoli; Tong, Yanhong; Liu, Yichun

doi:10.1039/c9tc01182j

Cited by 49 publications

(46 citation statements)

References 38 publications

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“…It has been reported that the mobility of OTFT fabricated with vacuum evaporated gold contacts on a monolayer OSC film was two orders of magnitude lower than those of OTFTs fabricated with 2-or 3-molecular layers of OSC. To overcome this issue, development of a transfer or lamination process for contact electrodes, in which OSC layers are not exposed to the damage during vacuum evaporation, is a key challenge [30][31][32][33][34] . In the previous work 32 , the lamination technique has been demonstrated, where pre-patterned electrodes embedded into an elastic and flexible film, polydimethylsiloxane (PDMS), were employed.…”

mentioning

confidence: 99%

Damage-free Metal Electrode Transfer to Monolayer Organic Single Crystalline Thin Films

Makita

Yamamura

Tsurumi

et al. 2020

Sci Rep

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Solution-processed organic thin film transistors (OTFTs) are an essential building block for nextgeneration printed electronic devices. Organic semiconductors (OSCs) that can spontaneously form a molecular assembly play a vital role in the fabrication of otfts. otft fabrication processes consist of sequential deposition of functional layers, which inherently brings significant difficulties in realizing ideal properties because underlayers are likely to be damaged by application of subsequent layers. These difficulties are particularly prominent when forming metal contact electrodes directly on an OSC surface, due to thermal damage during vacuum evaporation and the effect of solvents during subsequent photolithography. In this work, we demonstrate a simple and facile technique to transfer contact electrodes to ultrathin OSC films and form an ideal metal/OSC interface. Photolithographically defined metal electrodes are transferred and laminated using a polymeric bilayer thin film. One layer is a thick sacrificial polymer film that makes the overall film easier to handle and is water-soluble for dissolution later. The other is a thin buffer film that helps the template adhere to a substrate electrostatically. The present technique does not induce any fatal damage in the substrate OSC layers, which leads to successful fabrication of OTFTs composed of monolayer OSC films with a mobility of higher than 10 cm 2 V −1 s −1 , a subthreshold swing of less than 100 mV decade −1 , and a low contact resistance of 175 Ω⋅cm. The reproducibility of efficient contact fabrication was confirmed by the operation of a 10 × 10 array of monolayer OTFTs. The technique developed here constitutes a key step forward not only for practical OTFT fabrication but also potentially for all existing vertically stacked organic devices, such as light-emitting diodes and solar cells.

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confidence: 99%

Damage-free Metal Electrode Transfer to Monolayer Organic Single Crystalline Thin Films

Makita

Yamamura

Tsurumi

et al. 2020

Sci Rep

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“…[88] In addition, Cui et al developed a new type of PEDOT:PSS/SWCNT stretchable transparent electrode through one-step photolithography and dry etching (Figure 8a). [103] PEDOT:PSS layers provided good interfacial wettability for SWCNT dispersion, thus forming an ultrathin and uniform conductive film (Figure 8b,c). As a result, this kind of photolithographic PEDOT:PSS/SWCNT electrodes exhibited stretchability of 100% and sheet resistance of 90 Ω sq −1 .…”

Section: Carbon Materials For Stretchable Electrodesmentioning

confidence: 99%

Recent Advances in High‐Mobility and High‐Stretchability Organic Field‐Effect Transistors: From Materials, Devices to Applications

Wu¹,

Liu²,

Zhang³

et al. 2021

Small Methods

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“…Poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) semiconducting polymer is solution processable and transparent, having great potential in flexible optoelectronics. [ 88 ] In 2017, Kostianovskii et al. used patterned PEDOT:PSS films as source‐drain electrodes for ambipolar OFETs.…”

Section: Strategies For Reducing Rc In Ofetsmentioning

confidence: 99%

Effect of contact resistance in organic field‐effect transistors

Shi

Liu

et al. 2021

Nano Select

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Contact resistance (RC) is universally present in organic field‐effect transistors (OFETs) and the performance of OFETs can be easily affected by RC, which will result in poor performances such as low mobility (μ), large threshold voltage (VT), and non‐ideal transfer/output characteristics. In this article, we provide a comprehensive review on the effects of RC in OFETs. We start with a brief introduction of the origin of RC and its effects on OFETs, followed by the commonly used methods for extraction of RC. Then, methods for reducing RC are thoroughly discussed. Especially, fabricating monolayer molecular crystal (MMC) OFETs is highlighted as one of the key solutions to reduce RC effectively. The final section describes the challenges in MMCs preparation and concludes with an outlook for further reducing RC to enhance the performances of OFETs.

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A photolithographic stretchable transparent electrode for an all-solution-processed fully transparent conformal organic transistor array

Abstract: A photolithographic stretchable transparent electrode comprising PEDOT:PSS and SWCNT was developed for an all-solution-processed transparent conformal organic transistor array.

Cited by 49 publications

References 38 publications

Damage-free Metal Electrode Transfer to Monolayer Organic Single Crystalline Thin Films

Damage-free Metal Electrode Transfer to Monolayer Organic Single Crystalline Thin Films

Recent Advances in High‐Mobility and High‐Stretchability Organic Field‐Effect Transistors: From Materials, Devices to Applications

Effect of contact resistance in organic field‐effect transistors

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