Electron transport in solution-grown TIPS-pentacene single crystals: Effects of gate dielectrics and polar impurities

Huang, Zhuo Ting; Xue, Guo Biao; Wu, Jia; Liu, Shuang; Li, Huan Bin; Yang, Yu; Yan, Feng; Chan, Paddy K. L.; Chen, Hong Zheng; Li, Han Ying

doi:10.1016/j.cclet.2016.05.016

Cited by 15 publications

(6 citation statements)

References 69 publications

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“…The utility of organic FETs (OFETs) has been demonstrated in multiple electronic devices such as flexible sensors, memory devices, and in the driving circuitry of organic displays . There are now various OFETs with new semiconductor materials exhibiting field-effect mobilities exceeding 1 cm 2 V –1 s –1 . − These OFETs are able to match or even exceed the basic performance of amorphous silicon thin-film transistors.…”

Section: Self-healing Devicesmentioning

confidence: 99%

Self-Healing Electronic Materials for a Smart and Sustainable Future

Tan

et al. 2018

ACS Appl. Mater. Interfaces

180

132

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The survivability of living organisms relies critically on their ability to self-heal from damage in unpredictable situations and environmental variability. Such abilities are most important in external facing organs such as the mammalian skin. However, the properties of bulk elemental materials are typically unable to perform self-repair. Consequently, most conventional smart electronic devices today are not designed to repair themselves when damaged. Thus, inspired by the remarkable capability of self-healing in natural systems, smart self-healing materials are being intensively researched to mimic natural systems to have the ability to partially or completely self-repair damages inflicted on them. This exciting area of research could potentially power a sustainable and smart future.

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Section: Self-healing Devicesmentioning

confidence: 99%

Self-Healing Electronic Materials for a Smart and Sustainable Future

Tan

et al. 2018

ACS Appl. Mater. Interfaces

180

132

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“…The hydroxyl-free, low-k PMMA dielectric was also found to facilitate electron transport. 37 However, a more in-depth study on C 60 single crystals suggests that the negative conclusion about hydroxyl groups could be premature. Decent electron mobility (>1 cm 2 V −1 s −1 ) was maintained even though the hydroxyl-rich poly(4-vinylphenol) (PVP) and poly(vinyl alcohol) (PVA) were applied as the dielectric (Figure 6).…”

Section: Relatively High Electron Mobility In the Presence Of Hydroxy...mentioning

confidence: 99%

“…In our previous work, the BCB layer with a thickness of around 10 nm has been adopted to benchmark the electron mobility of TIPS-PEN, C 60 , and TIPS-TAP single crystals. The hydroxyl-free, low- k PMMA dielectric was also found to facilitate electron transport …”

Section: Insights For Organic Electronicsmentioning

confidence: 99%

Crystallization from a Droplet: Single-Crystalline Arrays and Heterojunctions for Organic Electronics

Peng

2021

Acc. Chem. Res.

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Conspectus Single crystals of organic semiconductors (OSCs) are believed to have both high mobility and intrinsic flexibility, making them promising candidates for flexible electronic/optoelectronic applications and being consistently pursued by researchers. The van der Waals force in OSC enables low-temperature solution processing of single crystals, but the relatively weak binding energy brings challenges in forming large, uniform, and defect-free single crystals. To promote the study on OSC single crystals, a generalized method that grows high-quality crystals in an easy-to-handle, time/resource-saving, and repeatable manner is apparently necessary. In 2012, Li et al. developed a droplet-pinned crystallization (DPC) method that uses a rather simple strategy to create a steadily receding contact line for the growth of OSC single crystals. Instead of setting up expensive equipment, controlling strict deposition parameters, or waiting for days or weeks for countable crystal seeds, the DPC method offers a time- and cost-effective way to obtain OSC single crystals for further study of the tendency of crystallization, single-crystal mobility, and molecular packing information. The DPC method is primarily a powerful tool for studying the charge-transport mechanisms in OSC single crystals. In pioneering work, high-mobility single crystals of both p-type 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) and n-type C60 materials were obtained. Driven by the demands from practical applications, we then focused on the general lagging of electron mobility in OSC materials. The ambipolar property of TIPS-PEN was studied, and a strong correlation between electron mobility and polar species (polar solvent residuals and surface hydroxyl groups) was observed. The latter further guided the harvest of electron mobility in a series of OSC materials. Undoubtfully, the facile DPC method accelerated these studies by providing a time-efficient, reliable, and repeatable testing platform. Additionally, flexibility on OSC materials and solvents, where not only one-component but also binary systems were allowed, is another critical integrity of the DPC method. The m-xylene/carbon tetrachloride binary solvent was proven to be efficient for growing ribbon-like C60 single crystals rather than needle-like crystals from typical one-component solvents. Afterward, a variety of OSC materials (including p-type, n-type, and ambipolar ones) and a series of solvents (including aromatic, aliphatic, and polar ones) were studied. The crystallization of OSC single crystals was primarily found at either the top liquid–air interface or the bottom solid–liquid interface. The interactions between OSC molecules and substrate surfaces were deduced as the qualitative determining factor. By utilizing the top interface crystallization, the two-step sequential deposition of single-crystalline OSC heterojunctions was enabled. Moreover, by selecting appropriate pairs of OSC materials that crystallize at separate interfaces, the facile one-step formation of...

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“…Compared to directly dropping the solution containing pregrown crystals, the DPC method is an in situ technique offering conformal crystal growth along predominant directions on the substrate. Varied types of single crystal arrays were deposited through this method, including 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN), , 6,13-bis(triisopropylsilylethynyl)-5,7,12,14-tetraazapentacene (TIPS-TAP), tetracene, anthracene, tetracyanoquinodimethane (TCNQ), perylene, , 2,7-dioctyl[1]benzothieno[3,2- b ][1]benzothiophene (C 8 -BTBT), diketopyrrolopyrrole (DPP)-based small molecules, and so on. Furthermore, growth conditions like mixed solvents and their ratio, substrate treatment, evaporation environment, and even the pinner itself still have the potential to be optimized.…”

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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Electron transport in solution-grown TIPS-pentacene single crystals: Effects of gate dielectrics and polar impurities

Cited by 15 publications

References 69 publications

Self-Healing Electronic Materials for a Smart and Sustainable Future

Self-Healing Electronic Materials for a Smart and Sustainable Future

Crystallization from a Droplet: Single-Crystalline Arrays and Heterojunctions for Organic Electronics

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

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