Semiconductor light-emitting device
A semiconductor light-emitting device includes a substrate, a first reflective layer disposed on the substrate and including first openings, a first conductivity-type semiconductor layer grown in and extending from the first openings and connected on the first reflective layer, a second reflective layer disposed on the first conductivity-type semiconductor layer and including second openings having lower surfaces disposed to be spaced apart from upper surfaces of the first openings, and a plurality of light-emitting nanostructures including nanocores extending from the second openings and formed of a first conductivity-type semiconductor material, and active layers and second conductivity-type semiconductor layers sequentially disposed on the nanocores.
1. A semiconductor light-emitting device, comprising:
a substrate;
a first reflective layer disposed on the substrate and including first openings;
a first conductivity-type semiconductor layer grown in and extending from the first openings and connected on the first reflective layer;
a second reflective layer disposed on the first conductivity-type semiconductor layer and including second openings having lower surfaces disposed to be spaced apart from upper surfaces of the first openings; and
a plurality of light-emitting nanostructures including nanocores extending from the second openings and formed of a first conductivity-type semiconductor material, and active layers and second conductivity-type semiconductor layers sequentially disposed on the nanocores.
2. The semiconductor light-emitting device of claim 1 , wherein:
the first reflective layer includes a pillar-shaped distributed Bragg reflector extending perpendicular to the substrate, and
the pillar-shaped distributed Bragg reflector is surrounded by the first openings.
3. The semiconductor light-emitting device of claim 1 , wherein the first openings have a pillar shape extending perpendicular to the substrate, and
the first reflective layer includes a distributed Bragg reflector surrounding the first openings.
4. The semiconductor light-emitting device of claim 3 , wherein areas of the upper surfaces of the first openings are greater than areas of the lower surfaces of the second openings.
5. The semiconductor light-emitting device of claim 1 , wherein the second reflective layer includes a distributed Bragg reflector surrounding the second openings.
6. The semiconductor light-emitting device of claim 1 , further comprising:
a third reflective layer disposed below the first reflective layer and including third openings having upper surfaces disposed to be spaced apart from lower surfaces of the first openings; and
a first conductivity-type semiconductor bottom layer grown in and extending from the third openings and connected on the third reflective layer.
7. The semiconductor light-emitting device of claim 1 , further comprising a buffer layer disposed on the substrate.
8. The semiconductor light-emitting device of claim 1 , further comprising a first electrode disposed on the first conductivity-type semiconductor layer.
9. The semiconductor light-emitting device of claim 1 , further comprising a contact electrode layer disposed on the plurality of light-emitting nanostructures and the second reflective layer.
10. The semiconductor light-emitting device of claim 1 , wherein a thickness of a portion of the first conductivity-type semiconductor layer formed on the first reflective layer is less than that of the first reflective layer.
11. The semiconductor light-emitting device of claim 1 , wherein the substrate is silicon (Si) substrate.