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  Room temperature discotic liquid crystalline thin films of hexa-peri-hexabenzocoronene: Synthesis and optoelectronic properties

Liu, C. Y., Fechtenkötter, A., Watson, M. D., Müllen, K., & Bard, A. J. (2003). Room temperature discotic liquid crystalline thin films of hexa-peri-hexabenzocoronene: Synthesis and optoelectronic properties. Chemistry of Materials, 15(1), 124-130.

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Liu, C. Y., Autor
Fechtenkötter, Andreas1, Autor           
Watson, Mark D.1, Autor           
Müllen, Klaus1, Autor           
Bard, A. J., Autor
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Zusammenfassung: The compound hexa-(3,7,11,15-tetramethylhexadecanyl)hexa peri- hexabenzocoronene (HBCC4/16), soluble in most organic solvents such as chloroform and THF, was synthesized. This compound shows a stable discotic hexagonal columnar mesophase between - 36 and 231 °C. Symmetrical sandwich cells of ITO/HBC-C-4/16/ITO (∼ 1 μm thick) were prepared by capillary filling by the molten state for the studies of their optical and optoelectronic properties. Two distinct textures, one very bright and the other gray, were clearly seen in thin films of HBC-C-4/16 between two crossed polarizers in an optical microscope at room temperature. Shortcircuit photocurrents (ISC) were obtained with such cells, and the gray areas generated a much higher short circuit photocurrent compared to that of the bright spots. This photocurrent difference was attributed to different orientations of the HBC-C-4/16 molecular columns relative to the ITO electrode surface. The charge trapping and detrapping effects found earlier with other materials, such as zinc porphyrins (ZnODEP), and of potential use in optoelectronic data storage were also observed with these cells.

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Sprache(n): eng - English
 Datum: 2003-01-14
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: eDoc: 28286
ISI: 000180368000021
Anderer: P-03-162
 Art des Abschluß: -

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Titel: Chemistry of Materials
  Alternativer Titel : Chem. Mat.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 15 (1) Artikelnummer: - Start- / Endseite: 124 - 130 Identifikator: ISSN: 0897-4756