Organic Electroluminescence in Porous Alumina

  • Miura Isamu
    Graduate School of BASE (Bio-Applications and Systems Engneering), Tokyo University of Agriculture and Technology
  • Okada Yoshiki
    RIKEN (The Institute of Physical and Chemical Research)
  • Kudoh Satoshi
    Graduate School of BASE (Bio-Applications and Systems Engneering), Tokyo University of Agriculture and Technology
  • Nakata Munetaka
    Graduate School of BASE (Bio-Applications and Systems Engneering), Tokyo University of Agriculture and Technology

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Description

Porous alumina with vertical pores having an average diameter of 100 nm was fabricated by the anodization of highly pure aluminum in oxalic acid solution. A solution of 1,2-dichloroethane containing tris(8-quinolinolato)-aluminum(III) (Alq), N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD), and poly(methyl methacrylate) (PMMA) was dropped onto the porous alumina in vacuum, and indium tin oxide (ITO) was coated on the alumina by DC sputtering after drying to fabricate an organic electroluminescence (EL) device. It was found that the peak of the electroluminescence spectrum of this device shifted to a shorter wavelength than that of a conventional layered electroluminescence device prepared using the same solution.

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