Patent ID: 7816161
Filing Date: 2010-10-19
Classification: H01L

Abstract:
1. An organic electroluminescent device, comprising: a switching element and a driving element connected to each other on a substrate including a pixel region; gate and data lines connected to the switching element and crossing each other to define the pixel region and a power line crossing one of the gate line and the data line; a planarization layer on the switching element and the driving element, the planarization layer having a substantially flat top surface; a passivation layer of an inorganic insulating material between the planarization layer and the switching element and between the planarization layer and the driving element; a cathode on the planarization layer, the cathode connected to the driving element; an emitting layer on the cathode; an electron injection layer on the cathode, an electron transport layer on the electron injection layer, a hole transport layer on the emitting layer, a hole injection layer on the hole transport layer, and a buffer layer on the hole injection layer, wherein each of these layers are sequentially formed; and an anode on the emitting layer.