Surface morphology of fluorene thin film fabricated by electrospray deposition technique using two organic solvents: Application for organic light-emitting diodes

IR

Abstract

type:text

We achieved the reduced the surface roughness of poly[9,9-dioctylfluorenyl-2,7-diyl]-co-1,4-benzo-(2,1,3)-thiadiazole (F8BT) thin film fabricated by the electrospray deposition technique, using two organic solvents. The root mean square (RMS) roughness of the F8BT thin film was reduced by the addition of dimethyl sulfoxide (DMSO) in tetrahydrofuran (THF). A minimum RMS roughness of 23 nm was obtained by optimizing the ratio of DMSO in THF. We found that the low evaporation pressure of the additional organic solvent is an important factor in attaining a smooth surface for F8BT thin film. The current density-voltage-luminance characteristics of the organic lightemitting diode was improved by reducing the surface roughness of the F8BT layer. A maximum luminance of 36.7 cd/cm2 was obtained, and it was more than 14 times higher than the reference device fabricated by the conventional single organic solvent technique.

NOTICE: this is the author's version of a work that was accepted for publication in Thin Solid Films. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin Solid Films, [VOL 520, ISSUE 1, (2011)] DOI : 10.1016/j.tsf.2011.07.048.

identifier:http://www.sciencedirect.com/science/article/pii/S0040609011014350

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Details 詳細情報について

  • CRID
    1050001337818946560
  • NII Article ID
    120006386276
  • ISSN
    00406090
  • Web Site
    http://id.nii.ac.jp/1586/00013784/
  • Text Lang
    en
  • Article Type
    journal article
  • Data Source
    • IRDB
    • CiNii Articles

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