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Organic thin films of copper-phthalocyanine (CuPc) and aluminum tris-8-hydroxyquinline (Alq3) were fabricated via KrF laser ablation. In spite of poor crystallinity exhibited in the reconstructed organic films, the CuPc film still works as a hole-transport layer in electroluminescence cells based on the CuPc and Alq3 layers. Electroluminescence at ∼500 nm was obtained with a low initiation voltage of ∼12 V. There is no significant difference in electroluminescence performance for devices fabricated via laser ablation and thermal evaporation. Emission at ∼600 nm caused by energy transfer from Alq3 to 4-(Dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) is also observed from a DCM-doped Alq3 emission layer.

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Non-polymer organic thin films such as copper-phthalocyanine (CuPc) and 4-dialkylamino-4'-nitrostilbene (DANS) were fabricated by KrF laser ablation. Changes in the chemical composition and structure, and in the crystallinity were studied for various laser ablation conditions. Crystalline thin films with accurate composition transfer from the target material were deposited when reducing the laser ablation fluence close to the ablation threshold fluence of N20 mJlcm2. Semiconductor characteristics of CuPc thin film was examined in a Schottky diode.

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