The organic emitting material 8-h.ydroxyl quinoline aluminium (Alqs) has bean prepared. The thin film of Alq3 and electroluminescent devices using Alq3 as the emitting element have been fabricated. The photolumi-nescence of this film and electroluminescence properties of the device were investigated. The EL device behaves like an injection-limited model. The device can be driven to produce a green emission with the brightness of 100cd/m