Selective solution shearing deposition of high performance TIPS-pentacene polymorphs through chemical patterning

Giri, Gaurav; Miller, Eric R.; Bao, Zhenan

doi:10.1557/jmr.2014.305

Cited by 16 publications

(10 citation statements)

References 48 publications

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“…An impressive average hole mobility of 2.5 cm 2 V –1 s –1 with a maximum value up to 2.9 cm 2 V –1 s –1 was achieved with a shearing speed of 2.1 mm/s. This mobility outperforms most of previously reported solution-processed TIPS-PEN films as well as vacuum-deposited TIPS-PEN films on modified substrates (measured in ambient condition). ,− Note that such mobility values are directly extracted from the transfer curves without subtracting the gap areas, hence, a higher value of intrinsic mobility can be expected. By further increasing the shearing speed of TIPS-TAP, the resulting transistor performance will decrease because of the discontinuous morphologies (indicated above).…”

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confidence: 56%

“…The responsivities (defined as ΔG/G 0 , in which ΔG is the conductivity changing value during NO 2 exposure, G 0 is the conductivity before analyte exposing) generally linearly increase with the NO 2 concentration and exhibit a sensitivity (defined as the slope of the linear relationship of responsivity versus NO 2 concentration) as high as 1300% ppm −1 (Figure 5f), which is higher than our previous high quality TIPS-PEN films grown on vacuum deposited molecular templates and superior to most of the organic semiconductor-based NO 2 sensors. 42 In addition, the crystalline films also show a higher responsivity larger than 200% when the NO 2 concentration is down to 0.5 ppm, suggesting the potential for ppb level detection (Figure 5g). We also checked the sensing performance after storage in ambient condition for about 50 days, the responsivity to 1 ppm of NO 2 still maintains in the range of 450%, suggesting the good stability of the sensor (Figure S13).…”

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confidence: 97%

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Organic Heteroepitaxy Growth of High-Performance Responsive Thin Films with Solution Shearing Crystals as Templates

Lü

Wang

Xue

et al. 2022

ACS Materials Lett.

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Organic semiconductor thin films with the ability to efficiently respond to different stimuli have recently received tremendous attention. Both efficient charge transport and suitable microstructure are required to achieve high responsiveness. Herein, we report a heteroepitaxy strategy to fabricate highly aligned organic crystalline thin films with both high surface-to-volume ratio and excellent charge mobility. A solution-sheared one-dimensional crystalline film is first grown as a template, and the vacuum deposited active layer undergoes template-guided vertical heteroepitaxial growth, leading to the formation of the highly aligned morphology. A mobility as high as 2.9 cm2 V–1 s–1 with good air stability is achieved because of the highly oriented morphology and the passivation effect on surface traps by the template layer. Importantly, such structured films with high mobility exhibit excellent performance in UV light and gas detection. The strategy reported in the current study holds great promises in constructing highly responsive surfaces/interfaces.

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confidence: 56%

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confidence: 97%

Organic Heteroepitaxy Growth of High-Performance Responsive Thin Films with Solution Shearing Crystals as Templates

Lü

Wang

Xue

et al. 2022

ACS Materials Lett.

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“…Micropillars on the blade induced an accelerated flow rate in the narrow spacing, which enhanced the mass transport in the solution and avoided the branch-like growth as well as voids in the crystalline film. To tune the molecular arrangements in the crystals, more adjustments on the blade, , substrate surface (including wettability or patterned strips), ,,− solvent, or external electric fields are applied and studied. Peng et al tried dual blade shearing to fabricate monolayer-based single-crystal gas sensors, where the second shearing is designed to remove the extra multilayers of preformed crystalline films.…”

Section: Pathways Toward Solution-grown Organic Single Crystals In La...mentioning

confidence: 99%

Scaling Up Principles for Solution-Processed Organic Single-Crystalline Heterojunctions

Peng

et al. 2020

Chem. Mater.

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The development of advanced organic devices has already broken the limit of one-component material constitution, seeking for integration of multiple components to achieve new features. It is well-known that organic single crystals have highly ordered molecular packing, which directly bounds up with electrical and optoelectrical behaviors. Thus, organic heterojunctions composed of binary organic single crystals are able to exhibit superior electrical/optoelectrical performance as well as novel functions. Intimate junction contact, high coverage, and wellaligned morphology are demanded in large-scale organic singlecrystalline heterojunctions for realizing subsequent device fabrication and further practical production. So far, fabrication of organic single-crystalline heterostructures without destroying the single crystallinity of both crystals has been extremely challenging, due to the fragile nature of weak noncovalent molecule−molecule interactions in organic single crystals. Therefore, the long-standing discrepancy will exist between the urgent need of organic singlecrystalline heterojunctions with desired morphology and enormous challenges in feasible large-scale preparation. Along with continuous developments in recent literature, we try to provide two principle frameworks including two-step crystallization and onestep crystallization methods as possible solutions.

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“…This contribution is helpful to our aim because it generally enhances the selection effect of the patterning and the crystalline domain size of printed structures, as compared to that observed for film prepared by conventional methods. Eventually, confinement can drive the polymorph formation toward a specific polymorph [ 30 , 31 , 32 ], which could be different from the stable species formed by conventional deposition [ 33 ]. Other parameters that can play an active role toward the formation of a specific polymorph can be locally imposed by the nature of the surface [ 34 ], stamp [ 29 ], solvent, or by the shrinkage rate [ 24 ] and temperature [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Polymorph Separation by Ordered Patterning

et al. 2022

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We herein address the problem of polymorph selection by introducing a general and straightforward concept based on their ordering. We demonstrated the concept by the ordered patterning of four compounds capable of forming different polymorphs when deposited on technologically relevant surfaces. Our approach exploits the fact that, when the growth of a crystalline material is confined within sufficiently small cavities, only one of the possible polymorphs is generated. We verify our method by utilizing several model compounds to fabricate micrometric “logic patterns” in which each of the printed pixels is easily identifiable as comprising only one polymorph and can be individually accessed for further operations.

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Selective solution shearing deposition of high performance TIPS-pentacene polymorphs through chemical patterning

Abstract: Abstract

Cited by 16 publications

References 48 publications

Organic Heteroepitaxy Growth of High-Performance Responsive Thin Films with Solution Shearing Crystals as Templates

Organic Heteroepitaxy Growth of High-Performance Responsive Thin Films with Solution Shearing Crystals as Templates

Scaling Up Principles for Solution-Processed Organic Single-Crystalline Heterojunctions

Polymorph Separation by Ordered Patterning

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