LIGHT EMITTING DEVICE

摘要

PURPOSE: A light emitting device is provided to increase the light emission efficiency by combining a second light emitting layer using the fluorescent material which can light both the sides of the excimer. CONSTITUTION: A hole-transport layer(311) including the hole transport material is formed on a first electrode. A first light-emitting layer(312) including the first host material and radiation guest is formed on the hole-transport layer. A second light-emitting layer(313) including the second host material and the phosphorescence material is formed on the first light-emitting layer.