Single Crystals of 5,5′‐Bis(4′‐methoxybiphenyl‐4‐yl)‐2,2′‐bithiophene for Organic Laser Media

Mizuno, Hitoshi; Haku, U.; Marutani, Yusuke; Ishizumi, Atsushi; Yanagi, Hisao; Sasaki, Fumio; Hotta, Shu

doi:10.1002/adma.201202470

Cited by 102 publications

(115 citation statements)

References 33 publications

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“…Self-assembled organic semiconductor nanowires have also yielded small lasers (300 nm diameter, 6 µm length) without the need for lithographic patterning 33 . In a similar fashion, internal reflection in micro-crystals of organic semiconductors has been used to define Fabry-Perot type cavities 35 .…”

Section: Small Laser Types and Their Characteristicsmentioning

confidence: 99%

“…These materials can be readily prepared as thin films (e.g., with thicknesses << 1 µm) by solution-based processes. In some cases, structures providing optical feedback can even form via self-assembly [33][34][35] . Moreover, the gain spectrum of these materials can be readily tuned by targeted modifications of chemical structure, composition and characteristic dimension (Fig.…”

Section: Active Materials For Small Lasersmentioning

confidence: 99%

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Advances in small lasers

2014

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In recent years there have been significant advances in the size and characteristics of small lasers, i.e. lasers with dimensions or modes sizes close to or smaller than the wavelength of emitted light. This work has primarily been led by innovative use of new materials and cavity designs. This article reviews some of the latest developments, particularly in metallic and plasmonic lasers, improvements in small dielectric lasers, and the emerging area of small bio-compatible/bioderived lasers. We examine the different approaches employed in small lasers to reduce size and how they lead to significant differences , particularly between metal and dielectric cavity lasers. We present potential applications for the various forms of small lasers and indicate where further developments are required.

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Section: Small Laser Types and Their Characteristicsmentioning

confidence: 99%

Section: Active Materials For Small Lasersmentioning

confidence: 99%

Advances in small lasers

2014

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“…The molecular geometry data of P6T and BP2T-OMe were borrowed from the literature [12,18]. We used the van der Waals radii [19] of hydrogen (1.20 Å) and nitrogen (1.55 Å) to estimate the molecular lengths.…”

Section: Methodsmentioning

confidence: 99%

“…Although high emission quantum yield is not necessarily a prerequisite for the solar cell materials, the TPCOs materials are well-known as highly emissive organic semiconductors. Several compounds of them exhibit the laser oscillation in the form of a single crystal [9][10][11][12]. This situation is parallel to that for inorganic semiconductors such as gallium arsenide [13,14].…”

Section: Introductionmentioning

confidence: 92%

Thiophene/Phenylene Co-Oligomers as Novel Photovoltaic Materials

Iwamoto¹,

Nakamura²,

Ohga³

et al. 2014

Molecular Crystals and Liquid Crystals

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We applied thiophene/phenylene co-oligomers (TPCOs) to a major component of organic solar cells. We made sandwich-type devices combining a p-type TPCO with fullerene (C 60 ) or an n-type TPCO. As an option we made a device that combined a mixed layer of p-type and n-type TPCOs with the C 60 layer. All devices indicated rectification properties in the dark and generated electric powers under the white light illumination. The device comprising methoxy-substituted biphenyl-capped bithiophene and C 60 achieved the best power conversion efficiency of 1.20% with a short-circuit current of 4.28 mA/cm 2 and fill factor of 0.46. The results demonstrate that the TPCO materials are useful as the major component of the organic solar cells.

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“…Organic crystal has considerable potential in photonic and potential second harmonic efficiency (SHG) efficiency as compared to its counterpart inorganic crystal [1][2]. Owing to their large second-order nonlinear optical susceptibilities and high potential for optical frequency conversion, organic crystals generally 5 cover a wide spectrum of the optical frequency-mixing field [3].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Optical, Piezoelectric, and Mechanical Properties in Crystal Violet Dye-Doped Benzophenone Crystals Grown by Czochralski Technique

Yadav

Sinha

Tyagi

et al. 2015

Crystal Growth & Design

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Pure and crystal violet dye doped (0.05 M%) benzophenone single crystals have been grown by Czochralski technique. Morphology of the grown crystal was analyzed by geometrical and bond energy consideration. Structural characterizations have been performed by powder X-ray diffraction analysis. Crystalline perfections of the grown crystals were examined by high resolution X-ray diffractometry (HRXRD). From UV-Vis measurements, increased transmittance with characteristic absorption at 590 nm for CV dye was observed in doped crystal. The photoluminescence intensity has increased by the effect of dye. Dielectric study was performed with temperature at various frequency ranges. In conductivity study, the activation energy in a temperature range of 30 -44 °C for pure and doped crystals were found to be 0.24 eV and 0.22 eV at 5 KHz. The piezoelectric charge coefficient (d 33 ) for pure and dye doped crystal was improved from 1 to 3 pC N -1 along [001]. The non-linear optical characterization has shown the Abstract Pure and crystal violet dye doped (0.05 M%) benzophenone single crystals have been grown by Czochralski technique. Morphology of the grown crystal was analyzed by geometrical and bond energy consideration. Structural characterizations have been performed by powder X-ray diffraction analysis. Crystalline perfections of the grown crystals were examined by high resolution X-ray diffractometry (HRXRD). From UV-Vis measurements, increased transmittance with characteristic absorption at 590 nm for CV dye was observed in doped crystal. The photoluminescence intensity has increased by the effect of dye. Dielectric study was performed with temperature at various frequency ranges. In conductivity study, the activation energy in a temperature range of 30 -44 °C for pure and doped crystals were found to be 0.24 eV and 0.22 eV at 5 KHz. The piezoelectric charge coefficient (d 33 ) for pure and dye doped crystal was improved from 1 to 3 pC N -1 along [001]. The non-linear optical characterization has shown the increased SHG efficiency of dye doped crystal. Mechanical properties of the grown crystals have been studied experimentally by Vicker's microhardness technique and variability of the measured data was statistically analyzed by Weibull distribution. No structural changes were observed after indentation in Raman studies confirming the durability of crystal.

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Single Crystals of 5,5′‐Bis(4′‐methoxybiphenyl‐4‐yl)‐2,2′‐bithiophene for Organic Laser Media

Cited by 102 publications

References 33 publications

Advances in small lasers

Advances in small lasers

Thiophene/Phenylene Co-Oligomers as Novel Photovoltaic Materials

Enhancement of Optical, Piezoelectric, and Mechanical Properties in Crystal Violet Dye-Doped Benzophenone Crystals Grown by Czochralski Technique

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