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US 2026/0314123 A1Published application
Light-emitting device and display apparatus including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsYoungtek OH, Joosung KIM, Dongchul SHIN, Kyungwook HWANG
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Abstract
According to an aspect of the disclosure, a light-emitting device capable of obtaining a sufficient light quantity with a low driving voltage and a display apparatus including the light-emitting device may be provided. The light-emitting device may include a light-emitting portion, a first common electrode under the light-emitting portion, a second common electrode under the light-emitting portion, and separation layers on side surfaces of light-emitting structures of the light-emitting portion.
Claims20
A light-emitting device comprising:
- a light-emitting portion comprising a first light-emitting structure and a second light-emitting structure on the first light-emitting structure in a first direction, the first light-emitting structure and the second light-emitting structure configured to emit light of a same wavelength as each other, wherein a width of the second light-emitting structure is greater than a width of the first light-emitting structure, each of the first light-emitting structure and the second light-emitting structure comprises a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, and the active layer is between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer in the first direction;
- a first common electrode comprising:
- a first common portion under the light-emitting portion in a second direction opposite to the first direction;
- and
- a plurality of first electrode portions extending from the first common portion such as to respectively contact the first conductivity type semiconductor layer of the first light-emitting structure and the first conductivity type semiconductor layer of the second light-emitting structure, wherein at least one of the plurality of first electrode portions comprises a conductive via structure;
- a second common electrode comprising:
- a second common portion under the light-emitting portion in the second direction;
- and
- a plurality of second electrode portions extending from the second common portion in the first direction such as to respectively contact a side surface of the second conductivity type semiconductor layer of the first light-emitting structure and a side surface of the second conductivity type semiconductor layer of the second light-emitting structure, wherein the plurality of second electrode portions are spaced apart from each other in a third direction crossing the first direction;
- and
- a plurality of separation layers configured to insulate the side surface of the second conductivity type semiconductor layer of the first light-emitting structure, the side surface of the second conductivity type semiconductor layer of the second light-emitting structure, a side surface of the active layer of the first light-emitting structure, and a side surface of the active layer of the second light-emitting structure from the plurality of second electrode portions.
8 more elements
A light-emitting device comprising:
- a light-emitting portion comprising a first light-emitting structure and a second light-emitting structure on the first light-emitting structure in a first direction, the first light-emitting structure and the second light-emitting structure configured to emit light of a same wavelength as each other, each of the first light-emitting structure and the second light-emitting structure comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer,
- wherein the active layer is between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer in the first direction,
- wherein a side surface of the second conductivity type semiconductor layer of the first light-emitting structure comprises a first concave portion comprising a stepped shape that is concave with respect to a side surface of the active layer of the first light-emitting structure and a side surface of the first conductivity type semiconductor layer of the first light-emitting structure,
- wherein a side surface of the second conductivity type semiconductor layer of the second light-emitting structure comprises a second concave portion comprising a stepped shape that is concave with respect to a side surface of the active layer of the second light-emitting structure and a side surface of the first conductivity type semiconductor layer of the second light-emitting structure, and
- wherein the light-emitting device further comprises:
- a first common electrode comprising:
- a first common portion under the light-emitting portion in a second direction opposite to the first direction;
- and
- plurality of first electrode portions extending from the first common portion such as to respectively contact the first conductivity type semiconductor layer of the first light-emitting structure and the first conductivity type semiconductor layer of the second light-emitting structure, wherein at least one of the plurality of first electrode portions comprises a conductive via structure;
- a separation layer on a side portion of the light-emitting portion, wherein the first concave portion and the second concave portion are exposed from the separation layer;
- and
- a second common electrode comprising:
- a second common portion under the light-emitting portion in the second direction;
- and
- a second electrode portion extending from the second common portion in the first direction along an outer surface of the separation layer such as to contact, via the first concave portion, the side surface of the second conductivity type semiconductor layer of the first light-emitting structure, and contact, via the second concave portion, the side surface of the second conductivity type semiconductor layer of the second light-emitting structure.
12 more elements
Dependencies are inferred from the claim text.