Analytical circuit model for thin film electroluminescent devices

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    Abstract

    A simple equivalent circuit is developed for alternating current thin film electroluminescent devices. With sinusoidal excitation voltage an exact analytical solution is presented for calculating the device current, transferred charge and the internal voltage across the phosphor layer.
    The circuit is used for modeling EL devices with widely varying phosphor layer materials that include ZnS, CaS, SrS, CaF/sub 2/, SrF/sub 2/, ZnF/sub 2/ and multilayer structures prepared with Atomic Layer Deposition.
    The equivalent circuit gives a straightforward way to characterize the electrical properties of these materials. The fluorides have inferior breakdown properties compared to sulfides although they are much more symmetric.
    The strong asymmetry of SrS is attributed to its nonuniform defect distribution
    Original languageEnglish
    Pages (from-to)1227-1232
    JournalIEEE Transactions on Electron Devices
    Volume42
    Issue number7
    DOIs
    Publication statusPublished - 1995
    MoE publication typeA1 Journal article-refereed

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