Template‐Guided Solution‐Shearing Method for Enhanced Charge Carrier Mobility in Diketopyrrolopyrrole‐Based Polymer Field‐Effect Transistors

Shin, Jicheol; Hong, Tae Ryang; Lee, Tae Wan; Kim, Aryeon; Kim, Yun Ho; Cho, Min Ju; Choi, Dong Hoon

doi:10.1002/adma.201401179

Cited by 67 publications

(76 citation statements)

References 29 publications

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“…Upon shearing of the pristine P3HT solution, there is some alignment of the nanodomains. 8,9,12,29 Thin films deposited by spin coating of a P3HT NW suspension clearly lead to randomly oriented P3HT NWs, as shown in Figure 2C. On the other hand, P3HT NWs deposited onto substrates using a solution shear-coating method give rise to well-aligned NWs (Figures 2D−G and S1).…”

Section: Resultsmentioning

confidence: 93%

“…Solution shear-coating techniques such as zone casting, 27 doctor blading, 28 strain stretching, 29 and template-guided 8,9,12 have been demonstrated to be effective strategies for the alignment of crystalline domains and polymer chains. Typically, the alignment of polymers or small molecules is achieved through the use of template-guided alignment or confined fluid flows on preengraved substrates.…”

Section: Introductionmentioning

confidence: 99%

“…While such approaches are promising, they are limited in their ability to align crystalline domains and polymer chains between domains to maximize charge-transport characteristics. [11][12][13]25 Because charge transport is governed by crystal packing, grain boundary, and intercrystalline morphology, 8,9,[11][12][13]26 the orientation and anisotropy of polymer crystals and chains inevitably play a crucial role in determining the efficiency of the carrier mobility.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Macroscopic Alignment of One-Dimensional Conjugated Polymer Nanocrystallites for High-Mobility Organic Field-Effect Transistors

Chang

Choi

Egap

2016

ACS Appl. Mater. Interfaces

102

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Controlling the morphology of polymer semiconductors remains a fundamental challenge that hinders their widespread applications in electronic and optoelectronic devices and commercial feasibility. Although conjugated polymer nanowires (NWs) are envisioned to afford high charge-carrier mobility, the alignment of preformed conjugated polymer NWs has not been reported. Here, we demonstrate an extremely simple and effective strategy to generate well-aligned arrays of one-dimensional (1D) polymer semiconductors that exhibit remarkable enhancement in charge transport using a solution shear-coating technique. We show that solution shear coating of poly(alkylthiophene) NWs induces extension or coplanarization of the polymer backbone and highly aligned network films, which results in enhanced intra- and intermolecular ordering and reduced grain boundaries. Consequently, highly aligned poly(3-hexylthiophene) NWs exhibited over 33-fold enhancement in the average carrier mobility, with the highest mobility of 0.32 cm(2) V(-1) s(-1) compared to pristine films. The presented platform is a promising strategy and general approach for achieving well-aligned 1D nanostructures of polymer semiconductors and could enable the next generation of high-performance flexible electronic devices for a wide range of applications.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Macroscopic Alignment of One-Dimensional Conjugated Polymer Nanocrystallites for High-Mobility Organic Field-Effect Transistors

Chang

Choi

Egap

2016

ACS Appl. Mater. Interfaces

102

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“…Since the solubility limit of the C 8 ‐BTBT would vary in different solvents, a relatively low concentration of 1 mg mL −1 was adopted for all the experiments to ensure all the cases are below the solubility limit . For the shearing speed, v , a moderate speed for the MGC technique, 100 µm s −1 , was used . The polarized optical microscope (POM) images of the deposited C 8 ‐BTBT thin films under different T and T b are compared in Figure .…”

Section: Resultsmentioning

confidence: 99%

Understanding the Meniscus‐Guided Coating Parameters in Organic Field‐Effect‐Transistor Fabrications

Chen

Peng

Huang

et al. 2019

Adv Funct Materials

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Meniscus-guided coating (MGC) is mainly applicable on the soluble organic semiconductors with strong π-π overlap for achieving single-crystalline organic thin films and high-performance organic field-effect-transistors (OFETs). In this work, four elementary factors including shearing speed (v), solute concentration (c), deposition temperature (T), and solvent boiling point (T b ) are unified to analyze crystal growth behavior in the meniscus-guided coating. By carefully varying and studying these four key factors, it is confirmed that v is the thickness regulation factor, while c is proportional to crystal growth rate. The MGC crystal growth rate is also correlated to latent heat (L) of solvents and deposition temperature in an Arrhenius form. The latent heat of solvents is proportional to T b . The OFET channels grown by the optimized MGC parameters show uniform crystal morphology (Roughness R q < 0.25 nm) with decent carrier mobilities (average µ = 5.88 cm 2 V −1 s −1 and highest µ = 7.68 cm 2 V −1 s −1 ). The studies provide a generalized formula to estimate the effects of these fabrication parameters, which can serve as crystal growth guidelines for the MGC approach. It is also an important cornerstone towards scaling up the OFETs for the sophisticated organic circuits or mass production.

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“…Therefore, several successful strategies were developed to enhance the organic semiconductor film crystallinity and morphology [32], such as dip-coating [33], solution-shearing [34], and slot die coating [24]. Among these methods, slot die coating has been proved to be a simplistic and manufacturable approach to fabricate large area high performance field effect transistors.…”

Section: Introductionmentioning

confidence: 99%

Controlling aggregation and crystallization of solution processed diketopyrrolopyrrole based polymer for high performance thin film transistors by pre-metered slot die coating process

Chang

Sonar

Lin

et al. 2016

Organic Electronics

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a b s t r a c tThe organic semiconductors have attracted much attention for plastic electronics due to their good solution processability, low temperature deposition, and compatible with large-area printing technology. The charge transport properties of polymer based field effect transistors are limited by their amorphous domains and weakly interaction between polymer chains. In this study, antisolvent like methanol is introduced to promote polymer chain aggregation, and slot die coating is used to finely tune the film morphology. The effects of anti-solvent introduction and slot die coating process on the device performance, e.g. charge transport, surface morphology, and solid state packing, were investigated in details. By optimizing the antisolvent ratio and polymer chain aggregation, the charge transport properties of the polymer devices were observed to be significantly improved. An average charge carrier mobility of 3.76 cm 2 V À1 s À1 and a maximum mobility of 4.10 cm 2 V À1 s À1 were achieved under optimized conditions. The controlling the aggregation degree by combining the mixed solvent system and slot die coating technique provides a convenient and practical approach to achieve high performance polymer field effect transistor.

show abstract

Template‐Guided Solution‐Shearing Method for Enhanced Charge Carrier Mobility in Diketopyrrolopyrrole‐Based Polymer Field‐Effect Transistors

Cited by 67 publications

References 29 publications

Macroscopic Alignment of One-Dimensional Conjugated Polymer Nanocrystallites for High-Mobility Organic Field-Effect Transistors

Macroscopic Alignment of One-Dimensional Conjugated Polymer Nanocrystallites for High-Mobility Organic Field-Effect Transistors

Understanding the Meniscus‐Guided Coating Parameters in Organic Field‐Effect‐Transistor Fabrications

Controlling aggregation and crystallization of solution processed diketopyrrolopyrrole based polymer for high performance thin film transistors by pre-metered slot die coating process

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