Side chain engineering of [1]benzothieno[3,2-b]benzothiophene (BTBT)-based semiconductors for organic field-effect transistors

Yun, Seungjae; Yun, Chang-Koo; Ho, Dongil; Chae, Wookil; Earmme, Taeshik; Kim, Choongik; Seo, Sang‐Hun

doi:10.1016/j.synthmet.2022.117022

Cited by 5 publications

(4 citation statements)

References 92 publications

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“…In addition to this, annealing itself has a positive effect on reducing material defects [ 48 ]. Hence, the hole transport of the material and the hole mobility of the device can be significantly increased [ 49 , 50 , 51 , 52 ]. In addition to this, we compared the mobility of BTBT and related derivatives and compared the results with our results, as shown in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

High-Performance Organic Field-Effect Transistors of Liquid Crystalline Organic Semiconductor by Laser Mapping Annealing

Huang,

Liu,

Bao

et al. 2024

Materials

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Organic semiconductors (OSCs), especially small molecule semiconductors, have received increasing attention due to their good designability and variability. Phase transitions and interfacial properties have a decisive influence on device performance. Here, 2-Dodecyl-7-phenyl[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT-12) devices are treated with low-power laser annealing, which is able to avoid the influence of the dewetting effect on the hole mobility of organic semiconductor materials. Ultraviolet ozone treatment and self-assembled monolayer treatment can improve the performance and stability of the device. Moreover, after low-temperature thermal annealing, the hole mobility of the device can even reach as high as 4.80 cm2 V−1 s−1, and we tested the optical response of the device to the ultraviolet wavelength and found that its maximum optical responsivity was 8.2 AW−1.

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Section: Resultsmentioning

confidence: 99%

High-Performance Organic Field-Effect Transistors of Liquid Crystalline Organic Semiconductor by Laser Mapping Annealing

Huang,

Liu,

Bao

et al. 2024

Materials

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“…[ 12 ] Over these years, the performance of OSCs and their OFETs has been continuously improved, with the high carrier mobilities of transistors ( µ ) > 1–10 cm 2 V −1 s −1 . [ 13 ] In addition to optimizing the molecular structures and characteristics of OSCs (typically main‐chain engineering and side‐chain engineering), [ 14–16 ] another key factor in developing high‐performance semiconductors and transistors is the processing technology. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

“…[12] Over these years, the performance of OSCs and their OFETs has been continuously improved, with the high carrier mobilities of transistors (µ) > 1-10 cm 2 V −1 s −1 . [13] In addition to optimizing the molecular structures and characteristics of OSCs (typically main-chain engineering and side-chain engineering), [14][15][16] another key factor in developing high-performance semiconductors and transistors is the processing technology. [17] It is well known that the electrical properties of OSCs not only depend on the molecular structures, but also are closely on the aggregation structures of the semiconductor thin films, resulting in two carrier transport modes: intramolecular band transport and intermolecular hopping transport.…”

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confidence: 99%

Meniscus‐Guided Deposition of Organic Semiconductor Thin Films: Materials, Mechanism, and Application in Organic Field‐Effect Transistors

Ren

Cao

2023

Small

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as well as their application in organic optoelectronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and other devices. [3][4][5][6][7][8][9][10][11] OFET is one of the basic devices to characterize electrical properties of OSCs and also has wide applications as the core component of organic electronic products, such as organic sensors, organic electronic circuits, wearable electronic devices, and so on. [12] Over these years, the performance of OSCs and their OFETs has been continuously improved, with the high carrier mobilities of transistors (µ) > 1-10 cm 2 V −1 s −1 . [13] In addition to optimizing the molecular structures and characteristics of OSCs (typically main-chain engineering and side-chain engineering), [14][15][16] another key factor in developing high-performance semiconductors and transistors is the processing technology. [17] It is well known that the electrical properties of OSCs not only depend on the molecular structures, but also are closely on the aggregation structures of the semiconductor thin films, resulting in two carrier transport modes: intramolecular band transport and intermolecular hopping transport. The carrier mobilities of the same OSC with different aggregated structures may differ by 10 or even 100 times, because the microstructure and the morphology of OSC films are influenced by many factors, such as intermolecular interaction, external forces, annealing, molecular self-assembly, and so on. [18][19][20] The common processing technologies of OSC thin films are mainly vacuum vapor deposition and solution processing. Vacuum deposition is only suitable for some small molecule semiconductors, and requires large equipments and high temperatures. So far, a great variety of solution processing methods [21] have been adopted to deposit semiconductor thin films, and spin coating is the most commonly used method in the laboratory. The process of spin coating is simple and suitable for small-area, but hard to prepare large-area uniform films, and more than 95% of the materials are wasted. [22] In addition, the orientation degree of the thin films prepared by spin coating is not high, and it is easier to form small-size spherulite crystals. Finally, the shear stress distribution is uneven during the spin-coating process, which makes it difficult to control the film morphology. [7] Solution-processable organic semiconductors are one of the promising materials for the next generation of organic electronic products, which call for high-performance materials and mature processing technologies. Among many solution processing methods, meniscus-guided coating (MGC) techniques have the advantages of large-area, low-cost, adjustable film aggregation, and good compatibility with the roll-to-roll process, showing good research results in the preparation of high-performance organic fieldeffect transistors. In this review, the types of MGC techniques are first listed and the relevant mechanisms (wetting mechanism, fluid...

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“…[15] Indeed, thienoacene-based derivatives, comprising fused rings in a ladder-type molecular structure, present a highly delocalized structure and low-lying highest occupied molecular orbital (HOMO) energy level, affording outstanding electrical performance and stability. [16][17][18][19][20][21][22][23] In addition, strong SÀ S and π-π intermolecular interactions of thienoacene-based derivatives have been known to enhance large intermolecular orbital overlap in the solid state and promote good charge transport characteristics. [24][25][26] Among thienoacene-based derivatives, dithieno[3,2-b : 2',3'd]thiophene (DTT)-based compounds are one of the promising candidates as active materials in high performance OFETs.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Solution‐Processable Dithieno[3,2‐b : 2’,3’‐d]thiophenes Derivatives with Various End‐capped Groups for Organic Field‐Effect Transistors

Kang

Jang

et al. 2022

ChemPlusChem

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In this paper, four organic materials based on dithieno[3,2b : 2',3'-d]thiophene (DTT) core structure with end-capping groups (phenyl and thienyl) and linker (acetylenic and olefinic) between DTT-core and end-capping groups were synthesized and characterized as solution-processable organic semiconductors (OSCs) for organic field-effect transistors (OFETs). Thermal, optical, and electrochemical properties of the corresponding materials were determined. Next, all DTT-derivatives were coated by solution-shearing method, and the thin-film microstructures and morphologies were investigated. To investigate the electrical performance of four newly synthesized DTTderivatives, bottom-gate/top-contact OFETs were fabricated and characterized in ambient condition. It was found that substitution of acetylenic for olefinic linkers between DTT-cores and end-capping groups enhanced device performance. Especially, the resulting OFETs based on the compound containing phenylacetylene exhibited the highest hole mobility of 0.15 cm 2 /Vs and current on/off ratio of ~10 6 , consistent with film morphology and texture showing long range interconnected crystalline grains and strong diffraction peaks.

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Side chain engineering of [1]benzothieno[3,2-b]benzothiophene (BTBT)-based semiconductors for organic field-effect transistors

Cited by 5 publications

References 92 publications

High-Performance Organic Field-Effect Transistors of Liquid Crystalline Organic Semiconductor by Laser Mapping Annealing

High-Performance Organic Field-Effect Transistors of Liquid Crystalline Organic Semiconductor by Laser Mapping Annealing

Meniscus‐Guided Deposition of Organic Semiconductor Thin Films: Materials, Mechanism, and Application in Organic Field‐Effect Transistors

Development and Characterization of Solution‐Processable Dithieno[3,2‐b : 2’,3’‐d]thiophenes Derivatives with Various End‐capped Groups for Organic Field‐Effect Transistors

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