Submicrometer-sized organic light emitting diodes with a triphenylamine-containing polycarbonate as a guest molecule in a polymer blend

Chihaya Adachi, Seiji Hibino, Toshiki Koyama, Yoshio Taniguchi

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16 Citations (Scopus)

Abstract

We fabricated submicrometer-sized organic light emitting diodes (OLED) with bright emission using a polymer blend. The cell structure was composed of ITO (indium-tin oxide)/hole transport layer (polymer blend layer)/emitter layer/MgAg. We used poly (methyl methacrylate) (PMMA) as an inert host material and N,N′-diphenyl-N,N′-bis(3-methylphenyl)- [1,1′-biphenyl]-4,4′-diamine-polycarbonate (PC-TPD) as a guest material. The PC-TPD formed submicrometer-sized spherical domains, actually prolate spheroids, in the PMMA host layer. With 2 wt% of PC-TPD, the domain diameters were around 200 nm according to atomic force microscopy (AFM) observation. The OLED including such a blend structure appeared as an array of bright submicrometer-sized electroluminescence spots. The number of working diodes exceeded four million per square centimeter.

Original languageEnglish
Pages (from-to)L827-L830
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume36
Issue number6
DOIs
Publication statusPublished - Jan 1 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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