Light-emitting element, display device and light-emitting element manufacturing method

A display device, comprising

• a plurality of light-emitting elements,
• wherein each of the plurality of light-emitting elements includes:
• a first electrode;
• a second electrode disposed across from the first electrode;
• and
• a first light-emitting layer disposed between the first electrode and the second electrode, and including a plurality of first quantum dots and a spacer particle, the plurality of first quantum dots each including a first core and a first shell coating the first core and having an outermost layer containing either a metal chalcogenide complex or a metal chalcogenide compound,
• the plurality of light-emitting elements include a first light-emitting element and a second light-emitting element,
• the first light-emitting element includes, in the first light-emitting layer, a long-wavelength light-emitting core as the first core and a first spacer particle as the spacer particle,
• the second light-emitting element includes, in the first light-emitting layer, a short-wavelength light-emitting core as the first core and a second spacer particle as the spacer particle,
• the long-wavelength light-emitting core has a peak emission wavelength longer than a peak emission wavelength of the short-wavelength light-emitting core, and
• the first spacer particle is larger in particle size than the second spacer particle.

A display device, comprising:

• a first light-emitting element and a second light-emitting element,
• wherein the first light-emitting element includes:
• a first electrode;
• a second electrode disposed across from the first electrode;
• and
• a first light-emitting layer disposed between the first electrode and the second electrode, and including a plurality of first quantum dots and a spacer particle, the plurality of first quantum dots each including a first core and a first shell coating the first core and having an outermost layer containing either a metal chalcogenide complex or a metal chalcogenide compound,
• the first light-emitting element includes, in the first light-emitting layer, the first core and the spacer particle,
• the second light-emitting element includes:
• a third electrode;
• a fourth electrode disposed across from the third electrode;
• and
• a second light-emitting layer disposed between the third electrode and the fourth electrode, and including a plurality of second quantum dots each including a third core having a peak emission wavelength shorter than a peak emission wavelength of the first core, and
• the second light-emitting layer contains a less amount of a plurality of the spacer particles than the first light-emitting layer does.