By a News Reporter-Staff News Editor at Journal of Technology -- New research on Materials Science is the subject of a report. According to news originating from Pessac, France, by VerticalNews correspondents, research stated, "Discotic molecules comprising a rigid aromatic core and flexible side chains have been promisingly applied in OLEDs as self-organizing organic semiconductors. Due to their potentially high charge carrier mobility along the columns, device performance can be readily improved by proper alignment of columns throughout the bulk."
Our news journalists obtained a quote from the research from National Center for Scientific Research (CNRS), "In the present work, the charge mobility was increased by 5 orders of magnitude due to homeotropic columnar ordering induced by the boundary interfaces during thermal annealing in the mesophase. State-of-the-art diodes were fabricated using spin-coated films whose homeotropic alignment with formation of hexagonal germs was observed by polarizing optical microscopy. The photophysical properties showed drastic changes at the mesophase-isotropic transition, which is supported by the gain of order observed by X-ray diffraction."
According to the news editors, the research concluded: "The electrical properties were investigated by modeling the current-voltage characteristics by a space-charge-limited current transport with a field dependent mobility."
For more information on this research see: Order Induced Charge Carrier Mobility Enhancement in Columnar Liquid Crystal Diodes. ACS Applied Materials & Interfaces, 2013;5(22):11935-11943. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Applied Materials & Interfaces - www.pubs.acs.org/journal/aamick)
The news correspondents report that additional information may be obtained from J. Eccher, CNRS, F-33600 Pessac, France. Additional authors for this research include G.C. Faria, H. Bock, H. von Seggern and I.H. Bechtold.
Keywords for this news article include: Pessac, France, Europe, Materials Science
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