HP Labs Technical Reports

Microcavity Effects in Thin Film Electroluminescence

Mueller, Gerd O.; Mueller-Mach, Regina; Alinsog, Elmer

HPL-96-105

Keyword(s): electroluminescence thin film devices, microcavity effects

Abstract: Using Fabry-Perot structures by sandwiching Thin Film ElectroLuminescence (TFEL) stacks between mirrors the emission can be confined spectrally and/or angularly to the Fabry-Perot modes. Even for active films optically as thick as 15 quarter wavelengths appreciable spectral narrowing of broad emission bands (ZnS:Mn) has been observed, as well as angular confinement in the case of narrow lines (ZnS:Tm, Ho). Comparisons with first attempts of modelling have been made.

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