LIGHT-EMITTING DEVICE

摘要

PURPOSE: A light emitting device is provided to improve purity of color by forming the light emitting color of a first organic compound and the light emitting color of a third organic compound into a same series color. CONSTITUTION: A light-emitting layer(111) is formed on an anode. A first layer(121) is formed on the light-emitting layer. An electron-transport layer(113) is formed on the first layer. A cathode is included on the electron-transport layer. The first layer delays the transportation of electronics which are inserted in the first layer.