Organic light-emitting diode including an interlayer to maintain a hole-electron balance in the emitting layer and display panel including the same

A display panel comprising:

• a base substrate;
• and
• an organic light-emitting diode,
• wherein the organic light-emitting diode comprises:
• a first electrode layer disposed on the base substrate;
• a second electrode layer disposed above the first electrode, and opposed to the first electrode layer;
• an emitting layer disposed between the first electrode layer and the second electrode layer;
• a hole transport region disposed between the emitting layer and the first electrode layer;
• a first electron transport region disposed between the emitting layer and the second electrode layer;
• a second electron transport region disposed between the emitting layer and the first electron transport layer, and contacting the emitting layer;
• and
• an interlayer disposed between the first electron transport region and the second electron transport region, and having a lowest unoccupied molecular orbital (LUMO) energy level higher than that of the second electron transport region.