Patent ID: 8536778

Claim:
An organic electroluminescent device, comprising: a gate line on a substrate including a pixel region; a power line parallel to and spaced apart from the gate line, the power line being formed at a same layer and of a same material as the gate line; a data line crossing the gate line to define the pixel region; a switching element and a driving element connected to the switching element, the switching element being connected to the gate and data lines, and the driving element being connected to the power line; a cathode connected to the driving element; a buffer layer on the cathode; a passivation layer on the buffer layer, the passivation layer and the buffer layer having a contact hole that exposes a portion of the cathode; an emitting layer on the passivation layer, the emitting layer contacting the cathode via the contact hole; and an anode on the emitting layer, wherein the buffer layer includes molybdenum (Mo).