| 摘要 |
PURPOSE:To accomplish an EL element equipped with high brightness and durability, which can be manufactured in simple processes, by using a light emitting layer in the form of a laminate film consisting of organic compound, having pos. hole transport ability and light emitting function, and organic compound having electron transport ability, or otherwise in the form of mixture film of these two. CONSTITUTION:A light emitting layer to be provided between two electrodes 2, 4 is constructed in the form of a laminate film consisting of organic compound layer 3a, having pos. hole transport ability and light emitting function, and organic compound layer 3b having electron transport ability, or otherwise in the form of mixture film 3c of these two. Use of these kinds of substances enables light emission from substantially all organic compounds having pos. transport ability and light emitting function with the energy levels of the pos. hole transport layer and electron transport layer taken into considerations. This achieves an EL element equipped with high brightness and durability, which can also be manufactured in simple processes.
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