Highly Oriented Liquid Crystal Semiconductor for Organic Field-Effect Transistors

Han, Moon Jong; Wei, Dayan; Kim, Yun Ho; Ahn, Hyungju; Shin, Tae Joo; Clark, Noel A.; Walba, David M.; Yoon, Dong Ki

doi:10.1021/acscentsci.8b00465

Cited by 45 publications

(38 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Han et al introduced rubbing process to fabricate and align MeOPh-BTBT-8 liquid crystal semiconductor, and the mobility was optimized along the particular direction. [132] Zhang et al introduced ultrasound concussion for accelerating the C8-BTBT crystallization, in which the energy could be provided for helping the movement of C8-BTBT molecules and eventually assisting to form fence-shaped single crystals. [133] Unlike C8-BTBT, C10-DNTT is dodecyl derivative of DNTT.…”

Section: Other Deposition Methodsmentioning

confidence: 99%

Structures, Properties, and Device Applications for [1]Benzothieno[3,2‐b]Benzothiophene Derivatives

Xie

Liu

Sun

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

1]benzothieno[3,2-b]benzothiophene (BTBT), with two benzene rings as the outermost rings, is referred to as diacene-fused ladder-type π-conjugated thienothiophenes. During the last three decades, derivatives based on BTBT core have been extensively studied due to their tremendous application prospects in organic field-effect transistors (OFETs) and organic optoelectronic devices. In order to further advance the development of organic electronics, new materials are constantly being synthesized and new methods are constantly evolving. This review mainly focuses on the crystal and electronic structures of BTBT derivatives, the soluble and thermal properties, the fabrication methods, as well as the strategies for performance improvement and optoelectronic applications including OFETs, photodetectors, synaptic devices, and organic light-emitting transistors. As one of the most promising organic materials, the insight into BTBT-based molecules will accelerate their potential application and provide important reference value for the development toward commercialized and industrialized organic semiconducting products.

show abstract

Section: Other Deposition Methodsmentioning

confidence: 99%

Structures, Properties, and Device Applications for [1]Benzothieno[3,2‐b]Benzothiophene Derivatives

Xie

Liu

Sun

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…[6][7][8][9][10][11][12][13] This enables the formation of high-quality crystalline OSC thin films with larger aligned domains, fewer grain boundaries, and better in-plane π-π stacking. [14][15][16][17] More importantly, LC materials can rely on phase change from molten liquid to the crystalline state to attain the LC thin films. [11] Compared with solution-processed OSC films, the formation of LC thin films by phase transition would not experience the complex solvent evaporation process, avoiding the undesired "coffee-ring" effect.…”

mentioning

confidence: 99%

Patterning Liquid Crystalline Organic Semiconductors via Inkjet Printing for High‐Performance Transistor Arrays and Circuits

Fang

Shi

Zhang

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Liquid crystalline (LC) organic semiconductors having long-range-ordered LC phases hold great application potential in organic field-effect transistors (OFETs). However, to meet real device application requirements, it is a prerequisite to precisely pattern the LC film at desired positions. Here, a facile method that combines the technique of inkjet printing and melt processing to fabricate patterned LC film for achieving high-performance organic integrated circuits is demonstrated. Inkjet printing controls the deposition locations of the LC materials, while the melt processing implements phase transition of the LC materials to form high-quality LC films with large grain sizes. This approach enables to achieve patterned growth of high-quality 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C 8 -BTBT) LC films. The patterned C 8 -BTBT LC film-based 7 × 7 OFET array has 100% die yield and shows high average mobility of 6.31 cm 2 V −1 s −1 , along with maximum mobility up to 9.33 cm 2 V −1 s −1 . As a result, the inverters based on the patterned LC films reach a high gain up to 23.75 as well as an ultrahigh noise margin over 81.3%. Given the good generality of the patterning process and the high quality of the resulting films, the proposed method paves the way for high-performance organic integrated devices.

show abstract

“…Liquid crystals (LCs) are an attractive class of soft matter with properties that fall somewhere between liquids and solid crystals [1][2][3]. They have gained a huge amount of attention due to their very promising applications in various technological fields such as organic field effect transistors (OFETs) [4], Pancharatnam-Berry (PB) microlense [5], liquid crystal elastomers [6], sunlight-driven polymer actuators [7], photovoltaics [8], biosensors [9][10][11] and telecommunications [12]. The design and development of new low cost liquid crystalline materials with a long mesophase temperature range and high thermal stability will always be a challenge, especially for thermotropic LCs, due to their extensive and potential applications in various fields.…”

Section: Introductionmentioning

confidence: 99%

Mesomorphic Behaviour and DFT Insight of Arylidene Schiff Base Liquid Crystals and Their Pyridine Impact Investigation

et al. 2021

View full text Add to dashboard Cite

A new series of Schiff base liquid crystal have been prepared and studied. Schiff bases of p-alkyl aniline derivatives and 4-phenyl pyridine-4′-carbaldehyde were prepared. The terminal alkyl groups substituting aniline are of varied chain length, namely C8, C12 and C14. The structures of the compounds were elucidated by 1H NMR and 13C NMR. The mesomorphic thermal and optical characteristics of the samples were determined via differential thermal analysis (DSC) and polarization optical microscopy (POM). All compounds exhibit enantiotropic dimorphic mesophase behaviour, referred to as smectic X1 (SmX1) and smectic X2 (Sm A). Experimental results obtained for the mesophases were correlated with density functional theory (DFT) theoretical calculations. The results of the new series are further compared to two series of compounds bearing pyridine (two ring Schiff bases) and biphenyl, respectively, in their mesogens. The series of compounds of one pyridine ring are generally not mesomorphic. The results indicate that the alkyl chain length has a strong impact on the mesomorphic characteristics and thermal stabilities of the different mesophases. As a trend, the temperature ranges of both of smectic mesophases of all compounds are higher in new compounds bearing the 4-phenyl pyridine moiety. In addition, the total mesophase range is generally higher in the new compounds when compared to their biphenyl analogues. Finally, theoretical DFT calculations were performed to illustrate the experimental finding of the mesomorphic behaviour in terms of the molecular geometry and aromaticity, π–π stacking and LOL-π.

show abstract

Highly Oriented Liquid Crystal Semiconductor for Organic Field-Effect Transistors

Cited by 45 publications

References 49 publications

Structures, Properties, and Device Applications for [1]Benzothieno[3,2‐b]Benzothiophene Derivatives

Structures, Properties, and Device Applications for [1]Benzothieno[3,2‐b]Benzothiophene Derivatives

Patterning Liquid Crystalline Organic Semiconductors via Inkjet Printing for High‐Performance Transistor Arrays and Circuits

Mesomorphic Behaviour and DFT Insight of Arylidene Schiff Base Liquid Crystals and Their Pyridine Impact Investigation

Contact Info

Product

Resources

About