Monolayer MoS2 field-effect transistors patterned by photolithography for active matrix pixels in organic light-emitting diodes

Kwon, Hyeokjae; Garg, Sourav; Park, Ji Hoon; Jeong, Yeonsu; Yu, Sanghyuck; Kim, Seongsin M.; Kung, Patrick; Im, Seongil

doi:10.1038/s41699-019-0091-9

Cited by 48 publications

(37 citation statements)

References 51 publications

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“…Therefore, the number of layers can be counted using the frequency difference (Δκ) between E 1 2g and A 1g peaks. Comparing the peak positions with the spectrum obtained from other works [20][21][22] , we predict that the spin-coated films are bi-layer (Δκ = 22.8 cm −1 ) and a few-layer (Δκ = 25.0 cm −1 ) structure for MoS 2 prepared from 0.005 and 0.025 M, respectively.…”

Section: Characterization Of Mos 2 Thin Filmssupporting

confidence: 56%

Bottom-up water-based solution synthesis for a large MoS2 atomic layer for thin-film transistor applications

2021

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A bottom-up water-based solution-process method was developed for atomic layered MoS2 with a one-step annealing process and no sulfurization. The chosen MoS2 precursor is water soluble and was carefully formulated to obtain good coating properties on a silicon substrate. The coated precursor was annealed in a furnace one time to crystallize it. This method can obtain a large and uniform atomic layer of 2D MoS2 with 2H lattice structure. The number of atomic layers (4–7) was controlled through the precursor concentrations and showed good uniformity, which was confirmed by STEM and AFM. Four types of thin-film transistors (TFTs) were prepared from the solution-processed MoS2 on Al2O3 and SiO2 dielectric with either thermal evaporated Al or printed Ag source and drain electrodes. The best result shows an improved mobility of 8.5 cm2 V−1 s−1 and a reasonable on–off ratio of about 1.0 × 105 with solid output saturation.

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Section: Characterization Of Mos 2 Thin Filmssupporting

confidence: 56%

Bottom-up water-based solution synthesis for a large MoS2 atomic layer for thin-film transistor applications

2021

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“…The well-known hydrophobic polymer PS has also found application in the transfer of CVD-grown TMD layers [64,65,[145][146][147][148][149][150]. For instance, Gurarslan et al made use of a surface energy-assisted process to delaminate MoS 2 [64].…”

Section: Polystyrene (Ps)-assisted Transfermentioning

confidence: 99%

Transfer of large-scale two-dimensional semiconductors: challenges and developments

Watson¹,

Lu²,

Guimarães³

et al. 2021

2D Mater.

113

103

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Two-dimensional (2D) materials offer opportunities to explore both fundamental science and applications in the limit of atomic thickness. Beyond the prototypical case of graphene, other 2D materials have recently come to the fore. Of particular technological interest are 2D semiconductors, of which the family of materials known as the group-VI transition metal dichalcogenides (TMDs) has attracted much attention. The presence of a bandgap allows for the fabrication of high on-off ratio transistors and optoelectronic devices, as well as valley/spin polarized transport. The technique of chemical vapor deposition (CVD) has produced high-quality and contiguous wafer-scale 2D films, however, they often need to be transferred to arbitrary substrates for further investigation. In this review, the various transfer techniques developed for transferring 2D films will be outlined and compared, with particular emphasis given to CVD-grown TMDs. Each technique suffers undesirable process-related drawbacks such as bubbles, residue or wrinkles, which can degrade device performance by for instance reducing electron mobility. This review aims to address these problems and provide a systematic overview of key methods to characterize and improve the quality of the transferred films and heterostructures. With the maturing technological status of CVD-grown 2D materials, a robust transfer toolbox is vital.

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“…Other key factors in generating a large current modulation demand thin and low doped semiconducting films [60]. Whereas a high on/off ratio approaching 10 8 is an essential requirement for display applications [61][62][63][64], this is not a mandatory condition for sensors. In addition, similar to the threshold voltage, wider voltage scans from cut-off to saturation modes are necessary to estimate I ON/OFF .…”

Section: Threshold Voltagementioning

confidence: 99%

Organic Thin-Film Transistors as Gas Sensors: A Review

et al. 2020

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Organic thin-film transistors (OTFTs) are miniaturized devices based upon the electronic responses of organic semiconductors. In comparison to their conventional inorganic counterparts, organic semiconductors are cheaper, can undergo reversible doping processes and may have electronic properties chiefly modulated by molecular engineering approaches. More recently, OTFTs have been designed as gas sensor devices, displaying remarkable performance for the detection of important target analytes, such as ammonia, nitrogen dioxide, hydrogen sulfide and volatile organic compounds (VOCs). The present manuscript provides a comprehensive review on the working principle of OTFTs for gas sensing, with concise descriptions of devices’ architectures and parameter extraction based upon a constant charge carrier mobility model. Then, it moves on with methods of device fabrication and physicochemical descriptions of the main organic semiconductors recently applied to gas sensors (i.e., since 2015 but emphasizing even more recent results). Finally, it describes the achievements of OTFTs in the detection of important gas pollutants alongside an outlook toward the future of this exciting technology.

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Monolayer MoS2 field-effect transistors patterned by photolithography for active matrix pixels in organic light-emitting diodes

Cited by 48 publications

References 51 publications

Bottom-up water-based solution synthesis for a large MoS2 atomic layer for thin-film transistor applications

Bottom-up water-based solution synthesis for a large MoS2 atomic layer for thin-film transistor applications

Transfer of large-scale two-dimensional semiconductors: challenges and developments

Organic Thin-Film Transistors as Gas Sensors: A Review

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