Display device and method of fabricating the same

A display device comprising a pixel connected to a scan line and a data line intersecting the scan line, wherein the pixel comprises:

• a light emitting element;
• a first transistor which controls a driving current supplied to the light emitting element according to a data voltage applied from the data line;
• and
• a second transistor which applies a voltage to the first transistor according to a scan signal transmitted to the scan line,
• wherein the first transistor comprises a first semiconductor layer and a first gate electrode disposed on the first semiconductor layer,
• wherein the second transistor comprises a first oxide semiconductor layer, a second gate electrode disposed on the first oxide semiconductor layer, a first spacer which is disposed on a first gate insulating layer disposed between the first oxide semiconductor layer and the second gate electrode and is disposed on each side surface of the second gate electrode, and a second spacer which is disposed on the first spacer, and
• wherein a concentration of hydrogen included in the first spacer is lower than a concentration of hydrogen included in the second spacer.