Patent ID: 7839085
Filing Date: 2010-11-23
Classification: H01L

Abstract:
1. An organic electroluminescent display (OELD) device, comprising: first and second substrates facing each other; a plurality of gate lines, a plurality of data lines and a plurality of power lines on the first substrate, the gate and data lines crossing each other to define a plurality of pixel regions, wherein each of the power lines is substantially parallel to each of the gate lines and formed at the same layer as the gate lines; a switching element and a driving element connected to each other in each pixel region, each of the switching and driving elements including a gate electrode, a gate insulating layer on the gate electrode, a semiconductor layer on the gate insulating layer and corresponding to the gate electrode, a source electrode on the semiconductor layer, and a drain electrode on the semiconductor layer and spaced apart from the source electrode, wherein the source electrode of the driving element is disposed at the same layer as the data line and the drain electrode of the switching element; a storage capacitor including a first storage electrode, the gate insulating layer on the first storage electrode and a second storage electrode on the gate insulating layer, the first storage electrode extending from the power line, the second storage electrode extending from the drain electrode of the switching element, wherein the gate insulating layer including a storage contact hole exposing a portion of the first storage electrode; a first electrode connected to the drain electrode of the driving element; an organic luminescent layer on the first electrode, the organic luminescent layer including a buffer layer as an uppermost layer; and a second electrode of a transparent conductive material on the organic luminescent layer, wherein the source electrode of the driving element contacts the portion of the first storage electrode through the storage contact hole and; wherein the buffer layer includes one of CuPC and V205.