A color-tunable polychromatic organic-light-emitting-diode device with low resistive intermediate electrode for roll-to-roll manufacturing

Takatoshi Tsujimura, Takeshi Hakii, Suguru Noda

    Research output: Contribution to journalArticle

    4 Citations (Scopus)


    A flexible organic-light-emitting diode (OLED) with capability to show 16 million colors is fabricated on plastic barrier-film substrate, which can produce arbitrary shape with arbitrary colors, suitable for artistic expressions. Independently controlled red, green, and blue light-emitting layers are stacked vertically, so that no visible structure can be observed even with magnifiers from right-in-front measurement. In the past, large voltage drop of intermediate electrode was preventing this approach to be applied to actual electronic devices. However, according to the surface mobility control using Fick's law analysis, low sheet resistance 7.34 ω/on plastic film is developed, so that 7.17-cm2 area emission is successfully achieved. With optical length optimization for each color stack, more than 100% color reproduction in National Television Committee Standard is achieved by stack design. The device can be used for colored illumination, as well as for organic-light-emitting display pixels for three times emission than the conventional pixel design. The device is fabricated on plastic substrate, so that the polychromatic OLED device is manufacturable with roll-to-roll production line.

    Original languageEnglish
    Article number7347398
    Pages (from-to)402-407
    Number of pages6
    JournalIEEE Transactions on Electron Devices
    Issue number1
    Publication statusPublished - 2016 Jan 1



    • Organic-light-emitting diode (OLED)
    • Silver
    • Thin films

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials

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