Color-Tunable Highly Polarized Emissions from Uniaxially Aligned Thin Films of Thiophene/Phenylene Co-oligomers

Yoshida, Yūji; Tanigaki, Nobuyuki; Yase, Kiyoshi; Hotta, Shu

doi:10.1002/1521-4095(200011)12:21<1587::aid-adma1587>3.0.co;2-s

Cited by 65 publications

(40 citation statements)

References 2 publications

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“…The u em -dependent emission outputs are curve-fitted using cos 2 u em , which is characteristic of uniaxially aligned transition dipoles of p-6P along the KCl á110ñ direction. [24,25] By contrast, the curve of u ex -dependent emission outputs is fitted by a higher power (n) function, cos n u ex (n~3.7 in Fig. 4b).…”

mentioning

confidence: 99%

Self-Waveguided Gain-Narrowing of Blue Light Emission from Epitaxially Oriented p-Sexiphenyl Crystals

Yanagi¹,

2001

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mentioning

confidence: 99%

Self-Waveguided Gain-Narrowing of Blue Light Emission from Epitaxially Oriented p-Sexiphenyl Crystals

Yanagi¹,

2001

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“…The substrates were, then, mechanically rubbed with a PTFE sheet by friction-transfer technique. [15][16][17][18][19][20][21] The twofold PTFE sheet (total 1 mm in thickness) was pressed onto the substrates with a compressed pressure of 6.25-7.45 kgf/cm 2 . The substrates were subsequently rubbed back and forth five times at a rate of 200 mm/min.…”

Section: Methodsmentioning

confidence: 95%

Improved Device Performance of Organic Crystal Field-Effect Transistors Fabricated on Friction-Transferred Substrates

Yamao¹,

Akagami²,

Nishimoto³

et al. 2009

J. Nanosci. Nanotech.

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We have improved performance of organic field-effect transistors (OFETs) composed of organic nanomolecular single crystals of a thiophene/phenylene co-oligomer. A poly(tetrafluoroethylene) thin layer was applied with friction-transfer technique to an insulator layer of silicon dioxide covering a silicon substrate. The crystals were grown in a liquid phase on the friction-transferred substrate such that the bottom-contact device was completed through depositing the crystals in firm contact with the premade metal electrodes. This technique ensures an excellent electrical contact between the crystal and the electrodes. The device shows the carrier mobility up to 0.26 cm2/Vs. The linear increase in the drain currents is clearly noted around the origin of the drain current-drain voltage action diagram. Thus we have achieved a high performance with the OFETs whose fabrication is based upon the friction-transfer technique.

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“…The substrates were, then, mechanically rubbed with a poly(tetrafluoroethylene) (PTFE) sheet by friction-transfer technique. [59][60][61][62][63][64][65] The twofold PTFE sheet (total 1 mm in thickness) was pressed onto the substrates with a compressed pressure of 6.25-7.45 kgf/cm 2 . The substrates were subsequently rubbed back and forth five times at a rate of 200 mm/min.…”

Section: Field-effect Transistor (Fet) Applicationsmentioning

confidence: 99%

Exotic Optoelectronic Properties of Organic Semiconductors with Super-Controlled Nanoscale Sizes and Molecular Shapes

Hotta¹,

Yamao²,

Katagiri³

2014

j nanosci nanotechnol

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We present several aspects of thiophene/phenylene co-oligomers (TPCOs). TPCOs are regarded as a newly occurring class of organic semiconductors. These materials are synthesized by hybridizing thiophene and phenylene rings at the molecular level with their various mutual arrangements. These materials are characterized by the super-controlled nanoscale sizes and molecular shapes. These produce peculiar crystallographic structures and high-performance optical and electronic properties. The crystals of TPCOs were obtained through both vapor phase and liquid phase. In the TPCO crystals, the molecules take upright configuration. These cause large carrier mobilities of field-effect transistors and laser oscillations under optical excitations. Spectrally-narrowed emissions (SNEs) were also achieved under weak optical excitation using a mercury lamp. The light-emitting field-effect transistors using these crystals for an active layer have shown the current-injected SNEs when the device was combined with an optical cavity and operated by an alternating-current gate-voltage method. Thus the TPCO materials will play an important role in the future in the fields of nanoscale technology and organic semiconductor materials as well as their optoelectronic device applications.

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Color-Tunable Highly Polarized Emissions from Uniaxially Aligned Thin Films of Thiophene/Phenylene Co-oligomers

Cited by 65 publications

References 2 publications

Self-Waveguided Gain-Narrowing of Blue Light Emission from Epitaxially Oriented p-Sexiphenyl Crystals

Self-Waveguided Gain-Narrowing of Blue Light Emission from Epitaxially Oriented p-Sexiphenyl Crystals

Improved Device Performance of Organic Crystal Field-Effect Transistors Fabricated on Friction-Transferred Substrates

Exotic Optoelectronic Properties of Organic Semiconductors with Super-Controlled Nanoscale Sizes and Molecular Shapes

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