Temperature measurements of a phosphorescent organic light-emitting diode by Raman spectroscopy

Hiroya Tsuji, Yukio Furukawa

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    Abstract

    We have observed the Raman spectrum of an operating phosphorescent organic light-emitting diode fabricated with bis(2-(2′-benzothienyl)-pyridinato-N,C3′)iridium(acetylacetonate) (Btp2Ir(acac)) as a phosphorescent emitter with excitation at 532 nm. All of the observed bands have been attributed to Btp2Ir(acac) because of the resonance Raman effect. We have determined the temperature of the emitting layer containing Btp2Ir(acac) from the ratio of the anti-Stokes to Stokes Raman bands of the 283-cm-1 vibrational mode attributed to Btp2Ir(acac). The temperature of the emitting layer is estimated to be 89 ± 8 °C at a current density of 400 A/m2.

    Original languageEnglish
    Pages (from-to)206-208
    Number of pages3
    JournalChemical Physics Letters
    Volume488
    Issue number4-6
    DOIs
    Publication statusPublished - 2010 Mar 22

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    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Physics and Astronomy(all)

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