Display device

A display device according to an embodiment includes: a substrate; a first conductive layer positioned on the substrate; a semiconductor layer positioned on the first conductive layer; a second conductive layer positioned on the semiconductor layer; an oxygen supply layer positioned under the second conductive layer, the oxygen supply layer being in contact with the second conductive layer and having the same planar shape as the second conductive layer; and a light emitting element connected to the second conductive layer, in which the oxygen supply layer includes a metal oxide including one or more of indium, zinc, tin, gallium, and alloys thereof. 根据实施例的显示装置包括：基底；第一导电层，定位在所述基底上；半导体层，定位在所述第一导电层上；第二导电层，定位在所述半导体层上；供氧层，定位在所述第二导电层下面，所述供氧层与所述第二导电层接触并且与所述第二导电层具有相同的平面形状；以及发光元件，连接到所述第二导电层，其中，所述供氧层包括金属氧化物，所述金属氧化物包括铟、锌、锡、镓和它们的合金中的一种或多种。