Patent ID: 8247804
Filing Date: 2012-08-21
Classification: H01L

Abstract:
1. A light-emitting element comprising: an anode; a first layer over and in contact with the anode, the first layer comprising a first organic compound; an organic compound layer over and in contact with the first layer; a second layer over and in contact with the organic compound layer, the second layer comprising the first organic compound; and a cathode over and in contact with the second layer, wherein: the organic compound layer comprises a first region, a light-emitting region over and in contact with the first region, and a second region over and in contact with the light-emitting region; the first region comprises the first organic compound and a hole-trapping substance; the light-emitting region comprises the first organic compound and a light-emitting substance; and the second region comprises the first organic compound and an electron-trapping substance.