The opposite electrode 315 may be provided over the display area DA, and may cover the display area DA. That is, the opposite electrode 315 may be formed as one body extending over the organic light-emitting diodes, and thus may correspond to the plurality of pixel electrodes 311 and 321. The opposite electrode 315 extends to the peripheral area PA, and thus, as illustrated in FIG. 3, may be electrically connected to the electrode power supply line VSS in the peripheral area PA. FIG. 3 illustrates that the opposite electrode 315 directly contacts the electrode power supply line VSS, however, the present disclosure is not limited thereto. For example, in an exemplary embodiment, an electrode layer including the same material as the first pixel electrode 311 may be interposed between the electrode power supply line VSS and the opposite electrode 315.
