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Novel Electroluminescence Properties of Thin Films Using Soluble Metallophthalocyanine Salts

We have prepared organic thin films of soluble dicyano(phthalocyaninato)iron salt, [(n-C7H15)4N][FeIII(Pc)(CN)2], and fabricated the electroluminescence (EL) devices having the Metal-Insulator-Metal structure. The device exhibits emission for both positive and negative bias voltages. We observed two bands in the EL spectra. One band was assigned to the Q band of the phthalocyanine molecule. The other, which shifts with changing the applied voltage, could correspond to the metal-to-ligand charge transfer (MLCT) band and/or the ligand-to-metal charge transfer (LMCT) band.