Abstract
A multilayer organic thin film electroluminescence (EL) device has been prepared for the first time by fully using the LB film technique. Its basic structure consists of a hole-transport layer of material, 1,10-bistearyl-4,6,13,15-tetraene-18-nitrogencrown-6 (Nc), without fluorescence, an electron-transport layer of material 8-hydroxyquinoline aluminum, (8-Alq), possessing fluorescence. A uniform blue-green emission was observed under DC voltages of 4–23 V. The electrical and optical properties of the device and the EL process are described. A possible explanation for the red shift of the EL spectrum compared with the PL spectrum of 8-Alq is discussed.
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