| 摘要 |
<p>PURPOSE:To obtain a highly bright and stable injection type thin film EL element by providing a light-emitting function manifestation layer which laminates an n-type inorganic semiconductor thin film layer and two organic compound thin film layers between two electrode layers in which at least one of them is transparent or translucent. CONSTITUTION:Two electrode layers 2 and 7 in which at least one of them is transparent or translucent are prepared and a light-emitting function manifestation layer 6 which laminates an n-type inorganic semiconductor thin film layer 3 and two organic compound thin film layers 4 and 5 is provided between two electrode layers. It is suitable that the foregoing two organic compound thin film layers 4 and 5 are composed of the layer 4 of a substance which is excited easily and the layer 5 of a substance having a large home mobility. For example, an ITO film and an SnO2 film are formed on a glass substrate 1 and the first transparent electrode layer 2 is formed. An n-type a-Si:H film 3, aluminum oxine complex (Al(Ox)3) thin film 4, and a large hole mobility layer 5 having a tetraphenyl thiophene skeleton are laminated after forming them on the electrode layer 2. A gold thin film is deposited on the above layer 5 and then the second electrode layer 7 is formed.</p> |
