Crystal growth of Trans-stilbene by vertical Bridgman technique with modified growth vessels and its characterisation

Arulchakkaravarthi, A.; Santhanaraghavan, P.; Ramasamy, P.

doi:10.1016/s0022-0248(01)00751-5

Cited by 38 publications

(22 citation statements)

References 10 publications

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“…Recently, growth of better quality crystals of anthracene and stilbene were demonstrated using a modified method, and selective selfseeding vertical Bridgman technique (SSVBT). By characterization it was proved that the crystals grown by the new method were of better quality compared to crystals grown by conventional method [6][7][8]. The X-ray diffraction studies at room temperature on the grown p-terphenyl single crystals have revealed monoclinic structure with the space group P2 1 =a with Z ¼ 2 in a unit cell of dimensions a ¼ 8:106 ( A; b ¼ 5:613 ( A; c ¼ 13:613 ( A and b ¼ 921 [9].…”

Section: Introductionmentioning

confidence: 99%

Growth and studies on SSVBT grown p-terphenyl single crystals

Selvakumar

Sivaji

Balamurugan

et al. 2005

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

Growth and studies on SSVBT grown p-terphenyl single crystals

Selvakumar

Sivaji

Balamurugan

et al. 2005

Journal of Crystal Growth

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“…In the Bridgman technique, the conical shape of the ampoule is an important parameter, since conical tip in the ampoule is the point of initiation of the solidification and controls further growth. 15 Researchers reported that the ampoules with cone angles in the range [15][16][17][18][19][20][21][22][23][24] are found to be the most optimum to obtain inclusion-free good quality transparent crystals. [16][17][18] Here we selected the cone angle of [19][20][21][22][23] for the double wall ampoule for the growth of benzil single crystals.…”

Section: Methodsmentioning

confidence: 99%

Growth and characterization of benzil single crystals using nanotranslation by the modified vertical Bridgman technique

Suthan¹,

Dhanaraj²,

Rajesh³

et al. 2011

CrystEngComm

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Benzil single crystals have been grown by the modified vertical Bridgman technique using the double wall ampoule with nanotranslation for the first time. The characterization studies of benzil crystals grown by both single and double wall ampoules were analyzed. The grown benzil crystal was confirmed by single crystal and powder X-ray diffraction analyses. Fourier transform infrared analysis confirms the functional groups of the grown benzil. High resolution X-ray diffraction analysis indicates the crystalline perfection of the grown crystals. The UV-Vis-NIR studies show that the grown benzil crystals cutoff wavelength is around 434 nm. The green emission of the grown benzil was identified by photoluminescence studies. The thermal property of the grown benzil was studied by thermogravimetric and differential thermal analyses. The dielectric measurements of benzil crystals were carried out with different frequencies and temperatures and the results indicate an increase in dielectric and conductivity parameters with the increase of temperature at all frequencies. The second harmonic conversion efficiency of the grown benzil was determined.

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“…However, the organic crystal growth involving Czochralski, Bridgman, or float zone methods has not been that easy to extend due to high vapor pressure and the material instabilities present near the melting point of the starting organic samples [309]. Of course, only in the case of some OS, available in quantity such as naphthalene [328], anthracene [329], phenanthrene [330], pyrene [331], tetracene [332], and stilbene [333], it was possible to meltgrow them, as these molecules were relatively stable at their melting points, but still they were noted to be susceptible to polymerization and/or decomposition during long heat treatments or under intense light irradiation. Mostly, the melt growth of OS is a complex phenomenon [309], as the material having concurrent sublimation/evaporation tendency during melting requires elaborate modifications to have a useful crystal puller.…”

Section: Melt-grown Os Crystalsmentioning

confidence: 99%

Organic semiconductors for device applications: current trends and future prospects

Ahmad

2014

Journal of Polymer Engineering

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Abstract:With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/ amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/ disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting π-conjugation and modifying the energy bandgap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.

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Crystal growth of Trans-stilbene by vertical Bridgman technique with modified growth vessels and its characterisation

Cited by 38 publications

References 10 publications

Growth and studies on SSVBT grown p-terphenyl single crystals

Growth and studies on SSVBT grown p-terphenyl single crystals

Growth and characterization of benzil single crystals using nanotranslation by the modified vertical Bridgman technique

Organic semiconductors for device applications: current trends and future prospects

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