Light-emitting apparatus
View Patent ↗The present application discloses a light-emitting apparatus comprising a first light-emitting semiconductor stack, a first intermediate layer formed on the first light-emitting semiconductor stack and a second light-emitting semiconductor stack formed on the first intermediate layer. The first intermediate layer comprises a first conductive semiconductor layer, a second conductive semiconductor layer and an intermediate region. The intermediate region has a discontinuous structure located between the first conductive semiconductor layer and the second conductive semiconductor layer.
1. A light-emitting apparatus, comprising
a first light-emitting semiconductor stack;
a first intermediate layer formed on the first light-emitting semiconductor stack and comprising a first conductive semiconductor layer, a second conductive semiconductor layer, and a first intermediate region comprising a plurality of separated solid structures formed on the first conductive semiconductor layer and covered by the second conductive semiconductor layer; and
a second light-emitting semiconductor stack formed on the first intermediate layer,
wherein one of the plurality of separated solid structures has a Fermi wavelength and a size smaller than the Fermi wavelength, and
wherein the conductive types of the first conductive semiconductor layer and the second conductive semiconductor layer are different.
2. The light-emitting apparatus of claim 1 , wherein the first conductive semiconductor layer or the second conductive semiconductor layer comprises a compound of III-V group.
3. The light-emitting apparatus of claim 2 , wherein the first conductive semiconductor layer comprises AlGaAs, the second conductive semiconductor layer comprises InGaP or GaAs.
4. The light-emitting apparatus of claim 1 , wherein the first intermediate region comprises a plurality of quantum dots comprising silicon.
5. The light-emitting apparatus of claim 1 , further comprising a first electrode layer electrically connected to the first light-emitting semiconductor stack and a second electrode layer electrically connected to the second light-emitting semiconductor stack.
6. The light-emitting apparatus of claim 1 , further comprising a third light-emitting semiconductor stack between the first light-emitting semiconductor stack and the first intermediate layer.
7. The light-emitting apparatus of claim 6 , further comprising a second intermediate layer between the third light-emitting semiconductor stack and the first light-emitting semiconductor stack.
8. The light-emitting apparatus of claim 7 , wherein the second intermediate layer comprises a third conductive semiconductor layer and a fourth conductive semiconductor layer.
9. The light-emitting apparatus of claim 8 , wherein the third conductive semiconductor layer and the fourth conductive semiconductor layer comprise a compound of III-V group.
10. The light-emitting apparatus of claim 9 , wherein the third conductive semiconductor layer comprises AlGaAs, the fourth conductive semiconductor layer comprises InGaP and GaAs.
11. The light-emitting apparatus of claim 8 , wherein the second intermediate layer further comprises a second intermediate region having a discontinuous structure, between the third conductive semiconductor layer and the fourth conductive semiconductor layer.
12. The light-emitting apparatus of claim 11 , wherein the second intermediate region comprises a plurality of quantum dots comprising silicon.