Self-assembly of organic channel/polymer dielectric layer in solution process for low-voltage thin-film transistors

Park, Ji Hoon; Lee, Kwang H.; Mun, Sung Jin; Ko, Gunwoo; Heo, Seon-Hee; Kim, Jae-Hoon; Kim, Eugene; Im, Seongil

doi:10.1016/j.orgel.2010.07.020

Cited by 25 publications

(20 citation statements)

References 14 publications

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“…Functionalized soluble acenes have recently attracted significant attention for use as active channel materials in organic field‐effect transistors (OFETs) because of their strong solid‐state intermolecular interactions and good intrinsic field‐effect mobilities 1–18. The solution processability of soluble acenes and their compatibility with rapid and easily controllable deposition methods offer a simple route to realizing low‐cost flexible electronics 1, 3, 7–9.…”

Section: Introductionmentioning

confidence: 99%

“…The solution processability of soluble acenes and their compatibility with rapid and easily controllable deposition methods offer a simple route to realizing low‐cost flexible electronics 1, 3, 7–9. The high performance of soluble acene‐based OFETs can be achieved mainly by controlling the morphology and molecular packing of organic semiconductor molecules in the thin films during the self‐organization process that occurs as the solvent evaporates 10–18. In an effort to optimize the self‐organization process, a variety of deposition methods have been used, such as drop‐casting,10–13, 18 spin‐coating,13, 14, 17 and ink‐jet printing 15.…”

Section: Introductionmentioning

confidence: 99%

“…The high performance of soluble acene‐based OFETs can be achieved mainly by controlling the morphology and molecular packing of organic semiconductor molecules in the thin films during the self‐organization process that occurs as the solvent evaporates 10–18. In an effort to optimize the self‐organization process, a variety of deposition methods have been used, such as drop‐casting,10–13, 18 spin‐coating,13, 14, 17 and ink‐jet printing 15. Previous studies showed that slow solvent evaporation produced highly crystalline large grains in semiconductor thin‐films, owing to sufficient time for self‐organization among the organic semiconductor molecules 10–18…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip‐Coating

Jang

Nam

et al. 2012

Adv Funct Materials

172

139

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The preparation of uniform large‐area highly crystalline organic semiconductor thin films that show outstanding carrier mobilities remains a challenge in the field of organic electronics, including organic field‐effect transistors. Quantitative control over the drying speed during dip‐coating permits optimization of the organic semiconductor film formation, although the kinetics of crystallization at the air–solution–substrate contact line are still not well understood. Here, we report the facile one‐step growth of self‐aligning, highly crystalline soluble acene crystal arrays that exhibit excellent field‐effect mobilities (up to 1.5 cm V−1 s−1) via an optimized dip‐coating process. We discover that optimized acene crystals grew at a particular substrate lifting‐rate in the presence of low boiling point solvents, such as dichloromethane (b.p. of 40.0 °C) or chloroform (b.p. of 60.4 °C). Variable‐temperature dip‐coating experiments using various solvents and lift rates are performed to elucidate the crystallization behavior. This bottom‐up study of soluble acene crystal growth during dip‐coating provides conditions under which one may obtain uniform organic semiconductor crystal arrays with high crystallinity and mobilities over large substrate areas, regardless of the substrate geometry (wafer substrates or cylinder‐shaped substrates).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip‐Coating

Jang

Nam

et al. 2012

Adv Funct Materials

172

139

View full text Add to dashboard Cite

show abstract

“…Second, the amorphous polymers can introduce both lateral and vertical phase segregation between the polymers and semiconductors [45]. For example, various polymers have been reported to cause vertical phase segregation with the organic semiconductors, including poly(methyl methacrylate) (PMMA) [46][47][48], poly (alpha-methylstyrene) (PαMS) [49][50][51][52][53][54][55][56], polystyrene (PS) [57][58][59], and poly(triarylamine) (PTAA) [60][61][62][63][64]. A group of polymers, including poly(ethyl acrylate) (PEA), poly(butylacrylate) (PBA), and poly(2-ethylhexyl acrylate) (P2EHA), were reported with the capability to switch between lateral phase segregation and vertical phase segregation [45].…”

Section: Comparison Of Various Additives 211 Polymeric Additivesmentioning

confidence: 99%

Nanoparticles for organic electronics applications

Zhang

2020

Mater. Res. Express

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Recently, the research in solution-based, small-molecule organic semiconductors has achieved great progress, although their application in organic electronics devices is still restricted by a variety of issues, including crystal misorientation, morphological nonuniformity and low charge-carrier mobility. In order to overcome these issues, hybrid material systems that incorporate both organic semiconductors and additives have been successfully demonstrated to control crystal growth and charge transport of the organic semiconductors. In this work, we first review the recent advances in the charge-carrier mobility of the organic semiconductors, followed by a comparison of the different additives that have been reportedly blended with the semiconductors, including polymeric additives, small-molecule additives and nanoparticle based additives. Then we will review the important nanoparticles employed as additives to blend with solution-based, organic semiconductors, which effectively improved the semiconductor crystallization, enhanced film uniformity and increased charge transport. By discussing specific examples of various well-known organic semiconductors such as 6, 13-bis (triisopropylsilylethynyl) pentacene (TIPS pentacene), we demonstrate the essential relationship among the crystal growth, semiconductor morphology, dielectric properties, and chargecarrier mobilities. This work sheds light on the implementation of nanoparticle additives in highperformance organic electronics device application. the application of the organic semiconductor in thin-film transistor and other electronics device fabrication. Throughout the discussion of these specific examples that mainly involve small-molecule organic semiconductors, we showcase that this work can be used to control the crystallization and electrical performance of other newly-discovered, high-performance, semiconducting materials. Advances in organic electronicsIn this section, we will review the various advances in charge-carrier mobilities and device application that have been recently achieved in the field of organic electronics. The following discussion will be mainly focused on various solution-processed, small-molecule, organic semiconductors.The mobilities in solution-processed, small-molecule, organic semiconductors have been reported to be compared to or even far surpass the mobility of amorphous silicon. For example, Asare-Yeboah et al developed a temperature-based method which exposed the substrate to a gradient temperature and induced a solubility difference of a p-type small-molecule semiconductor 6, 13-bis (triisopropylsilylethynyl) pentacene (TIPS pentacene) [18]. TIPS pentacene crystals grew from the lower temperature side of the substrate towards the higher temperature side, forming well-aligned ribbons across the whole substrate. A mobility of up to 0.5 cm 2 V −1 s −1 has been reported from the TIPS pentacene OTFTs based on an ITO/PET flexible substrate by using the temperature-based alignment technique. Wade et al demonstrated a zone casting metho...

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“…In order to improve crystallinity of inkjet printed TIPS pentacene film, the coffee stain effect should be minimized. One of the methods to overcome the coffee stain effect is to utilize a nucleation buffer layer using a self-assembled monolayer such as HMDS (hexamethyldisilazane) and O 2 plasma treatment [12,13]. The other approach is to change the solvent of the TIPS pentacene solution.…”

Section: Introductionmentioning

confidence: 99%

Characterization of 6,13-bis(triisopropylsilylethynyl) pentacene organic thin film transistors fabricated using pattern-induced confined structure

2014

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Self-assembly of organic channel/polymer dielectric layer in solution process for low-voltage thin-film transistors

Cited by 25 publications

References 14 publications

Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip‐Coating

Highly Crystalline Soluble Acene Crystal Arrays for Organic Transistors: Mechanism of Crystal Growth During Dip‐Coating

Nanoparticles for organic electronics applications

Characterization of 6,13-bis(triisopropylsilylethynyl) pentacene organic thin film transistors fabricated using pattern-induced confined structure

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