Voltage-induced infrared absorption of the light-emitting diode based on MEH-PPV

Yukio Furukawa, Mitsuru Ishima, Takanobu Noguchi, Toshihiro Ohnishi

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Infrared spectra of the light-emitting diodes fabricated with poly(2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene) have been measured in situ with an external reflection apparatus on a Fourier-transform infrared spectrophotometer. Voltage-induced infrared absorption spectra have been measured using the difference-spectrum method. The observed bands have been attributed to injected positive carriers (polarons) on the basis of the spectra of the carriers generated by iodine-doping, Na-doping, and photo-irradiation. The observation of positive carriers is probably related to the predominance of injected positive carriers, which reduces the electroluminescence efficiency of the light-emitting diodes.

    Original languageEnglish
    Pages (from-to)1649-1650
    Number of pages2
    JournalSynthetic Metals
    Volume121
    Issue number1-3
    DOIs
    Publication statusPublished - 2001 Mar 15

    Fingerprint

    Infrared absorption
    infrared absorption
    Light emitting diodes
    light emitting diodes
    Doping (additives)
    Infrared spectrophotometers
    Polarons
    Electroluminescence
    Electric potential
    electric potential
    Iodine
    Absorption spectra
    Fourier transforms
    infrared spectra
    infrared spectrophotometers
    Irradiation
    Infrared radiation
    polarons
    electroluminescence
    iodine

    Keywords

    • Electroluminescence
    • Infrared and Raman spectroscopy
    • Poly(phenylenevinylene) and derivatives

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Polymers and Plastics

    Cite this

    Voltage-induced infrared absorption of the light-emitting diode based on MEH-PPV. / Furukawa, Yukio; Ishima, Mitsuru; Noguchi, Takanobu; Ohnishi, Toshihiro.

    In: Synthetic Metals, Vol. 121, No. 1-3, 15.03.2001, p. 1649-1650.

    Research output: Contribution to journalArticle

    Furukawa, Yukio ; Ishima, Mitsuru ; Noguchi, Takanobu ; Ohnishi, Toshihiro. / Voltage-induced infrared absorption of the light-emitting diode based on MEH-PPV. In: Synthetic Metals. 2001 ; Vol. 121, No. 1-3. pp. 1649-1650.
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