Organosilicon dimer of BTBT as a perspective semiconductor material for toxic gas detection with monolayer organic field-effect transistors

Trul, Askold A.; Sizov, Alexey S.; Chekusova, Victoria P.; Borshchev, Oleg V.; Agina, Elena V.; Щербина, М. А.; Bakirov, Artem V.; Чвалун, С. Н.; Ponomarenko, Sergei A.

doi:10.1039/c8tc02447b

Cited by 37 publications

(42 citation statements)

References 53 publications

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“…Accordingly the electron density profiles from the multi-slice model are in good agreement with the profiles derived from the slab model (see Supplementary Figs. [4][5][6]. Figure 2d shows the electron density profiles extracted by the slab-model analysis, showing the profiles for the 1L and top and bottom layers of the 2L.…”

Section: Resultsmentioning

confidence: 99%

“…T wo-dimensional (2D) crystals have attracted considerable interest as a promising platform for a variety of electronic devices 1 . Quasi-2D single-crystal organic semiconductors (OSCs) of a few monolayers thickness enable potential applications for ultra-sensitive chemical sensors, where external stimuli caused by analyte adsorption directly modulate the electronic states of the crystal [2][3][4] . Ultra-thin crystalline semiconductors also offer great opportunities in the manufacturing of state-of-the-art organic field-effect transistors (OFETs) and integrated circuits with extremely low contact resistance due to the fact that the path to the charge-accumulated channel can be minimized [5][6][7] .…”

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confidence: 99%

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Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors

et al. 2020

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Arranging molecules into highly symmetric, topological crystal structures has been recognized as the best approach to functionalize electronic properties in molecular crystals, where the constituent molecules have been assumed to be rigid in shape. Here, in striking contrast, we demonstrate that the molecules in a monolayer organic crystal can undergo a significant deformation in proximity to the substrate, which is reflected by an asymmetry in the electron density profile. X-ray reflectivity and X-ray absorption spectroscopies in conjunction with density-functional theory calculations reveal that the highly planarized π-core are deformed into a bent shape, while the bulk lattice parameters are maintained. The molecular shape change is found to be perfectly suppressed in a bilayer single crystal, which leads to a 40% increase in mobility in the bilayer crystal. Our finding of a unique, sub-molecular scale shape change in monolayer single crystals can offer possibilities for functionalizing electrical properties via nano-scale physisorption.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors

et al. 2020

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“…Films with C11 showed better crystallinity and improved charge transfer thanks to the larger domain size and the lower tilt angle of the BTBT functional end groups in BTBT-C11-PA SAM. Monomolecular layers of BTBT organosilicon dimer D2-Und-BTBT-Hex, prepared on the water surface and transferred on to solid substrates, also showed better electronic properties of fabricated FET devices with increase in the crystallinity of the film [238].…”

Section: Polymer Photovoltaicsmentioning

confidence: 96%

Synchrotron Scattering Methods for Nanomaterials and Soft Matter Research

Narayanan

Konovalov

2020

Materials

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This article aims to provide an overview of broad range of applications of synchrotron scattering methods in the investigation of nanoscale materials. These scattering techniques allow the elucidation of the structure and dynamics of nanomaterials from sub-nm to micron size scales and down to sub-millisecond time ranges both in bulk and at interfaces. A major advantage of scattering methods is that they provide the ensemble averaged information under in situ and operando conditions. As a result, they are complementary to various imaging techniques which reveal more local information. Scattering methods are particularly suitable for probing buried structures that are difficult to image. Although, many qualitative features can be directly extracted from scattering data, derivation of detailed structural and dynamical information requires quantitative modeling. The fourth-generation synchrotron sources open new possibilities for investigating these complex systems by exploiting the enhanced brightness and coherence properties of X-rays.

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“…A number of techniques have been put forward to fabricate ultrathin OSC films, such as thermal evaporation, spin‐coating,[24e,25] bar‐coating, spray‐coating, dip‐coating, drop‐casting, inkjet printing, blade coating, self‐assembly, and Langmuir–Blodgett methods . As for small‐molecule OSCs, high‐vacuum thermal evaporation is a commonly used fabrication technique.…”

Section: D and Ultrathin Osc Filmsmentioning

confidence: 99%

Gas Sensors Based on Nano/Microstructured Organic Field‐Effect Transistors

Zhang

Zhao

et al. 2019

Small

102

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Benefiting from the advantages of organic field‐effect transistors (OFETs), including synthetic versatility of organic molecular design and environmental sensitivity, gas sensors based on OFETs have drawn much attention in recent years. Potential applications focus on the detection of specific gas species such as explosive, toxic gases, or volatile organic compounds (VOCs) that play vital roles in environmental monitoring, industrial manufacturing, smart health care, food security, and national defense. To achieve high sensitivity, selectivity, and ambient stability with rapid response and recovery speed, the regulation and adjustment of the nano/microstructure of the organic semiconductor (OSC) layer has proven to be an effective strategy. Here, the progress of OFET gas sensors with nano/microstructure is selectively presented. Devices based on OSC films one dimensional (1D) single crystal nanowires, nanorods, and nanofibers are introduced. Then, devices based on two dimensional (2D) and ultrathin OSC films, fabricated by methods such as thermal evaporation, dip‐coating, spin‐coating, and solution‐shearing methods are presented, followed by an introduction of porous OFET sensors. Additionally, the applications of nanostructured receptors in OFET sensors are given. Finally, an outlook in view of the current research state is presented and eight further challenges for gas sensors based on OFETs are suggested.

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Organosilicon dimer of BTBT as a perspective semiconductor material for toxic gas detection with monolayer organic field-effect transistors

Abstract: Monolayer organic field effect transistors (OFETs) based on novel BTBT dimer demonstrate excellent electrical performance and fast response to ammonia vapours.

Cited by 37 publications

References 53 publications

Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors

Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors

Synchrotron Scattering Methods for Nanomaterials and Soft Matter Research

Gas Sensors Based on Nano/Microstructured Organic Field‐Effect Transistors

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