Recent advances in organic field effect transistors

Abanoz, Ozge; Dimitrakopoulos, Christos

doi:10.3906/fiz-1407-6

Cited by 6 publications

(5 citation statements)

References 65 publications

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“…This high mobility was experimentally explained by the band-like transport and further corroborated by theoretical calculations showing large HOMO band widths and relatively small effective masses. MT-pyrene thus compares well with the best single-crystal molecular semiconductors reported so far …”

Section: Introductionsupporting

confidence: 76%

1,3,6,8-Tetrakis(methylchalcogeno)pyrenes: Effects of Chalcogen Atoms on the Crystal Structure and Transport Properties

et al. 2022

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Molecular semiconductors that crystallize into structures facilitating efficient two-dimensional (2D) overlap of molecular orbitals, such as herringbone, pitched π-stack, and brickwork (2D π-stack) structures, are promising as active materials in high-mobility organic field-effect transistors (OFETs). We have recently reported that 1,3,6,8-tetrakis-(methylthio)pyrene (MT-pyrene) that crystallizes into a new type of brickwork structure shows "ultrahigh" mobility of up to 32 cm 2 V −1 s −1 and band-like transport in a single-crystal field-effect transistor (SC-FET). Its oxygen and selenium analogues, that is, 1,3,6,8-tetramethoxypyrene (MO-pyrene) and 1,3,6,8-tetrakis-(methylseleno)pyrene (MS-pyrene), respectively, are likewise interesting in terms of crystal structure and transport properties. In the present work, MO-pyrene and MS-pyrene were synthesized and characterized. They crystallized into brickwork structures that seemed similar to that of MT-pyrene at first glance but were noticeably different on close inspection. The brickwork structure of MO-pyrene was more even in two π-stacking directions compared with that of MT-pyrene, whereas that of MS-pyrene was highly anisotropic and almost one-dimensional. The carrier transport properties of MO-pyrene and MS-pyrene were evaluated by fabricating SC-FETs. The SC-FETs demonstrated almost ideal transistor characteristics with sharp turn-on behavior and negligible hysteresis. On the other hand, MO-pyrene and MS-pyrene showed relatively low hole mobilities of up to 0.03 and 7.3 cm 2 V −1 s −1 , respectively. These experimental mobilities are consistent with those estimated by the hopping model, which is in sharp contrast to the band-like transport of MT-pyrene. The results indicate that methylchalcogeno groups not only contribute to the control of the crystal structure but also have a significant impact on the molecular orbital overlaps in the solid state and, therefore, the transport properties.

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Section: Introductionsupporting

confidence: 76%

1,3,6,8-Tetrakis(methylchalcogeno)pyrenes: Effects of Chalcogen Atoms on the Crystal Structure and Transport Properties

et al. 2022

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“…Mobility is the main materialdependent factor. Increasing mobility of printable organic semiconductors (OSC) has been a major area of research with a number of comprehensive review articles published [9][10][11][12]. Here, we will focus on dimensional factors.…”

Section: Introductionmentioning

confidence: 99%

Dimensional scaling of high-speed printed organic transistors enabling high-frequency operation

Grau

Subramanian

2020

Flex. Print. Electron.

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Printed electronics has promised to deliver low-cost, large-area and flexible electronics for massmarket applications for some time; however, so far one limiting factor has been device performance. Over the last decade, great progress has been made in terms of materials, processing and printing resolution for printed transistors. In this article, we review dimensional scaling of printed organic thin-film transistors, which has enabled high-frequency operation. We review different device architectures that require different dimensions to be scaled with accompanying tradeoffs in performance and complexity. Various printing methods have been used to print scaled transistors. Inkjet and gravure printing have seen the greatest improvements. We will focus on gravure printing here as it not only enables high-resolution features but also high-speed printing for low-cost manufacturing. Operating voltage has been scaled down less aggressively due to difficulties with scaling down the thickness of printed gate dielectrics. The performance of organic semiconductor materials has also improved substantially. When processing the semiconductor, the scaling of other device dimensions needs to be considered to optimize performance. Based on these advances, transistor switching frequency has increased dramatically over the last decade with several reports of high-speed printed inverters operating at high kHz to low MHz frequencies, which are promising results for emerging applications of printed electronics.

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“…[1][2][3] Such merits have motivated OFETs to advance toward various applications including photodetectors, nonvolatile memory devices, tactile sensors, pH sensors, thermal sensors, and biomedical devices. [1][2][3] Such merits have motivated OFETs to advance toward various applications including photodetectors, nonvolatile memory devices, tactile sensors, pH sensors, thermal sensors, and biomedical devices.…”

Section: Introductionmentioning

confidence: 99%

“…Organic field‐effect transistors (OFETs) have been extensively studied because they possess potential advantages over conventional inorganic FETs due to flexibility, lightweight, low‐temperature process, large‐area modules on plastic substrates, etc . Such merits have motivated OFETs to advance toward various applications including photodetectors, nonvolatile memory devices, tactile sensors, pH sensors, thermal sensors, and biomedical devices .…”

Section: Introductionmentioning

confidence: 99%

Light‐Insensitive Organic Field‐Effect Transistors with n‐Type Conjugated Polymers Containing Dinitrothiophene Units

Moon

Lee

Kim

et al. 2018

Adv Elect Materials

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Here, it is reported that organic field‐effect transistors (OFETs) with n‐type conjugated polymer, poly[{2,5‐bis‐(2‐octhyldodecyl)‐3,6‐bis‐(thien‐2‐yl)‐pyrrolo[3,4‐c]pyrrole‐1,4‐diyl}‐co‐{2,2′‐(3,4‐dinitrothiophene)]‐5,5′‐diyl}] (PODTPPD‐DNT), can be operated without large disturbance by surrounding light. The PODTPPD‐DNT polymer synthesized via the Stille coupling reaction could act as a channel layer for n‐channel OFETs. Although the PODTPPD‐DNT polymer shows a broad optical absorption from ultraviolet to near‐infrared parts up to 1000 nm, the OFETs with the PODTPPD‐DNT channel layers do not almost respond to monochromatic (520 and 780 nm) and white light. The reason is assigned to the exciton quenching effect by two nitro groups in the polymer chain. The semitransparent OFETs with the 20 nm thick PODTPPD‐DNT channel layers are also almost light‐insensitive for operation under typical room light conditions.

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Recent advances in organic field effect transistors

Cited by 6 publications

References 65 publications

1,3,6,8-Tetrakis(methylchalcogeno)pyrenes: Effects of Chalcogen Atoms on the Crystal Structure and Transport Properties

1,3,6,8-Tetrakis(methylchalcogeno)pyrenes: Effects of Chalcogen Atoms on the Crystal Structure and Transport Properties

Dimensional scaling of high-speed printed organic transistors enabling high-frequency operation

Light‐Insensitive Organic Field‐Effect Transistors with n‐Type Conjugated Polymers Containing Dinitrothiophene Units

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