Electronic device

An electronic device comprising:

• first to third light emitting regions;
• and
• a dummy region,
• wherein the electronic device comprises:
• a base layer;
• and
• a display element layer comprising a pixel defining film on the base layer, first to third light emitting elements which are divided by the pixel defining film and arranged corresponding to the first to third light emitting regions, respectively, and a reduction preventing layer which is disposed corresponding to the dummy region and comprises a reduction preventing agent,
• wherein the first to third light emitting elements each comprise:
• a first electrode;
• a second electrode on the first electrode;
• a hole transport region between the first electrode and the second electrode;
• and
• an electron transport region between the hole transport region and the second electrode and comprises a metal oxide, and
• wherein:
• the first light emitting element comprises a first emission layer comprising a first quantum dot between the hole transport region and the electron transport region;
• the second light emitting element comprises a second emission layer comprising a second quantum dot between the hole transport region and the electron transport region;
• and
• the third light emitting element comprises a third emission layer comprising a third quantum dot between the hole transport region and the electron transport region.