A5013328418- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Crystallography and molecular interactions
- Organic and Molecular Conductors Research
- Organic Light-Emitting Diodes Research
- Analytical Chemistry and Sensors
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Advanced Sensor and Energy Harvesting Materials
- Electrochemical Analysis and Applications
- Advanced Memory and Neural Computing
- Thin-Film Transistor Technologies
- Photochemistry and Electron Transfer Studies
- Synthesis and Properties of Aromatic Compounds
- Semiconductor materials and devices
- Ionic liquids properties and applications
- Cancer therapeutics and mechanisms
- Synthesis and Biological Evaluation
- Magnetism in coordination complexes
- Graphene research and applications
- MXene and MAX Phase Materials
- DNA and Nucleic Acid Chemistry
- Copper-based nanomaterials and applications
Pohang University of Science and Technology
2023
Tokyo Institute of Technology
2016-2021
Pakistan Institute of Nuclear Science and Technology
2021
Meguro Parasitological Museum
2017-2020
Tokyo University of Technology
2020
First Technical University
2020
Nagoya University
2019
Abstract To impart high stretchability to semiconducting polymers, researchers have used a photocrosslinking approach based on the nitrene chemistry of an azide‐incorporated molecular additive. However, understanding design azide crosslinkers with respect their effects electrical and mechanical properties polymer thin films is lacking. In this study, photocrosslinker's length structure microstructural, features, photocrosslinked conjugated investigated. For systematic comparison, series...
Sn-based perovskite solar cells (Sn-PSCs) are the most viable replacements for Pb-based PSCs. However, facile oxidation of Sn2+ and a high defect density on surfaces grain boundaries in Sn-PSCs complicate task attaining highly stable Sn-PSCs. Here, both passivated using fulleropyrrolidine with triethylene glycol monoethyl ether side chain (PTEG-1) as multifunctional molecular additive first time. The group fullerene PTEG-1 interact I–, respectively, thereby inhibiting formation Sn4+ I3–....
Dithieno[2,3-d;2′3′-d′]benzo[1,2-b;4,5-b′]dithiophene forms mixed-stack charge-transfer complexes with fluorinated tetracyanoquinodimethanes (FnTCNQs, n = 0, 2, and 4) dimethyldicyanoquinonediimine (DMDCNQI). The single-crystal transistors of the FnTCNQ exhibit electron transport, whereas DMDCNQI complex shows hole transport as well. dominance is explained by superexchange mechanism, where transfers corresponding to acceptor-to-acceptor hopping (teeff) are more than 10 times larger...
<italic>N</italic>-Unsubstituted thienoisoindigo and the diphenyl derivative are prepared these molecules exhibit ambipolar performance in organic thin film transistors.
Abstract TaS 2 nanolayers with reduced dimensionality show interesting physics, such as a gate‐tunable phase transition and enhanced superconductivity, among others. Here, solution‐based strategy to fabricate large‐area foil of hybrid /organic superlattice, where [TaS ] monolayers organic molecules alternatively stack in atomic scale, is proposed. The layers are spatially isolated remarkably weakened interlayer bonding, resulting lattice vibration close that monolayers. also shows excellent...
To investigate charge polarity of transistors based on donor/acceptor cocrystals, charge-transfer complexes wide donor molecules such as perylene and pyrene are investigated. As-grown single-crystal deposited from solutions, which attain perfect reproducibility in comparison with the conventional pasted transistors. Perylene dicyanoquinonediimines (DCNQI) substituents X = CH3, Cl, Br show hole-dominant ambipolar characteristics. Owing to large molecular width, orbitals not orthogonal,...
The title 1 : 2 charge-transfer complexes have DAA-type mixed stacks and show electron-dominant ambipolar transistor properties.
For basic understanding of transistor properties doped organic semiconductors, 3,3′,5,5′-tetramethylbenzidine charge-transfer complexes are investigated, which change from neutral to ionic by varying the acceptors. When going into state, bulk conduction increases more rapidly than mobility, but sufficiently thin devices exhibit properties. The resulting ambipolar characteristics analyzed in linear regions at small drain voltages analogy with graphene transistors. model is further extended...
Bisthienoisatins (BTI-R with R = n-propyl, n-hexyl, and 2-ethylhexyl) the dicyanomethylene derivatives (BTICN-R) are prepared, thin-film transistors investigated. The crystals have uniform stacking structures, but packing pattern of stacks varies depending on alkyl chains. These materials show n-type transistor properties, BTICNs exhibit greater performance than BTIs in general. In particular, BTICN-EH shows maximum electron mobility exceeding 0.2 cm2 V–1 s–1.
Single-crystal transistors of the title compounds show isotropic mobilities exceeding 1 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>.
Nickel complexes of 1,2-phenylenediamine show ambipolar transistor properties on tetratetracontane. Palladium, platinum, and cobalt analogues similar properties, particularly the palladium complex exhibits considerably improved performance, which is satisfactorily reproduced by calculated mobility. By using methyl- fluoro-substituted 1,2-phenylenediamines, we can observe a gradual shift from mainly hole transporting to electron characteristics with systematical threshold voltages. The small...
Length-Modulated Azide Photocrosslinker In article 2212127, Kilwon Cho, Boseok Kang, and co-workers, report a series of length-modulated azide photocrosslinkers (n-NIPS) that improve stretchability charge transport retention in thin films conjugated polymers. Especially, the shortest photocrosslinker, 1-NIPS, is demonstrated to enhance these properties, even up 80% unidirectional tensile strain.
Schiff base complexes derived from salicylaldehyde and ethylene-, propylene-, trans-1,2-cyclohexane-diamines exhibit p-channel transistor properties. The Cu are open-shell compounds, but the oxidation hole transport occur at highest occupied molecular orbital, where singly orbital (SOMO) does not participate in conduction. Although Ni tend to show larger mobilities than owing planarity, presence of SOMO is harmful
Quinhydrone is regarded as a donor-acceptor complex composed of hydroquinone and quinone. Here we show that 1,5-dibromo-2,6-naphthoquinhydrone shows electron transport in the transistors. The donor acceptor frontier orbitals are approximately same, but addition to strong ability quinone, enhancing canceling contributions second bridge orbital result monopolar transport. It demonstrated
In order to investigate the effects of bulky substituents on crystal structures and packing modes, N-benzyl (Bn) N-2-phenylethyl (EtPh) are introduced in bisthienoisatin (BTI), thienoisoindigo (TIIG), dibenzothienoisoindigo (DBTII). These molecules maintain uniform stacking structures, though EtPh-BTI has a two-dimensional slipped-herringbone structure. The benzyl groups largely distorted from molecular core, thin films Bn-TIIG Bn-DBTII show poor quality due two kinds orientations. contrast,...
The donor and acceptor abilities of hydrogen bonded organic semiconductors are significantly improved by intermolecular proton transfer.
Ambipolar transistor properties are observed in Schiff-base complexes derived from 2-aminobenzenethiol and 2-mercapto benzaldehyde, where a nickel atom is coordinated by two sulfur nitrogen atoms. The former have extremely small energy gaps of 0.5∼0.6 eV, air-stable ambipolar characteristics with off region observed. Air-stable
Extended and unsymmetrical birhodanines, including phenyl unsubstituted parts, are prepared show characteristic molecular packing n-channel transistor properties.
Recently, dimethylbenzoimidazole (DMBIH) derivatives have attracted considerable attention as an n-channel dopant. Crystal structures and conducting properties of several aryl-substituted benzoimidazolium (DMBI) salts fluorinated tetracyanoquinodimethanes (FnTCNQ, n = 0, 2, 4) are investigated. The aryl-groups not coplanar to the part, while 1:1 complexes form mixed stacks show a resistivity high 107 Ω cm. 2:3 1:2 segregate TCNQ trimer tetramer, respectively, comparatively small 102–103 DMBI...