Inorganic light emitting diode and inorganic light emitting device including the same
The present disclosure relates to an inorganic light emitting diode (LED) in which an emitting material layer (EML) includes inorganic luminescent particles dispersed in a siloxane matrix, wherein the siloxane matrix has a thickness equal to or less than a thickness of a layer of the inorganic luminescent particles, and an inorganic light emitting device including the inorganic LED. The siloxane matrix allows surface defects of the inorganic luminescent particles to be minimized and to prevent injections of holes and electrons from being delayed. The inorganic LED and the inorganic light emitting device lower their driving voltages and improve their luminous efficiency.
1. An inorganic light emitting diode, comprising:
a first electrode;
a second electrode facing the first electrode; and
an emitting material layer disposed between the first and second electrodes,
wherein the emitting material layer comprises plural inorganic luminescent particles dispersed in a siloxane matrix, and
wherein the siloxane matrix has a thickness less than a thickness of a layer of the inorganic luminescent particles.
2. The inorganic light emitting diode of claim 1 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a tenth of the thickness of the layer of the plural inorganic luminescent particles.
3. The inorganic emitting diode of claim 1 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a fourth of the thickness of the layer of the plural inorganic luminescent particles.
4. The inorganic emitting diode of claim 1 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a third of the thickness of the layer of the plural inorganic luminescent particles.
5. The inorganic light emitting diode of claim 1 , wherein the plural inorganic luminescent particles and the siloxane matrix in the emitting material layer are mixed with a volume ratio between about 1:0.01 and about 1:4.
6. The inorganic light emitting diode of claim 1 , wherein the plural inorganic luminescent particles and the siloxane matrix in the emitting material layer are mixed with a volume ratio between about 1:0.05 and about 1:2.
7. The inorganic light emitting diode of claim 1 , wherein the siloxane matrix comprises an orthosilicate moiety.
8. The inorganic light emitting diode of claim 7 , wherein the orthosilicate moiety comprises a tetramethyl orthosilicate moiety, a tetraethyl orthosilicate moiety, a tetrapropyl orthosilicate, a tetrabutyl orthosilicate, or a tetrakis (2-ethylhexyl) orthosilicate moiety.
9. The inorganic light emitting diode of claim 1 , wherein the siloxane matrix comprises a silsesquioxane.
10. The inorganic light emitting diode of claim 1 , wherein the plural inorganic luminescent particles include at least one of a quantum dot (QD) and a quantum rod (QR).
11. An inorganic light emitting device, comprising:
a substrate; and
the inorganic light emitting diode of claim 1 over the substrate.
12. The inorganic light emitting device of claim 11 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a tenth of the thickness of the layer of the plural inorganic luminescent particles.
13. The inorganic light emitting device of claim 11 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a fourth of the thickness of the layer of the plural inorganic luminescent particles.
14. The inorganic light emitting device of claim 11 , wherein the siloxane matrix has the thickness of at least equal to or greater than about a third of the thickness of the layer of the plural inorganic luminescent particles.
15. The inorganic light emitting device of claim 11 , wherein the plural inorganic luminescent particles and the siloxane matrix in the emitting material layer are mixed with a volume ratio between about 1:0.01 and about 1:4.
16. The inorganic light emitting device of claim 11 , wherein the plural inorganic luminescent particles and the siloxane matrix in the emitting material layer are mixed with a volume ratio between about 1:0.05 and about 1:2.
17. The inorganic light emitting device of claim 11 , wherein the siloxane matrix comprises an orthosilicate moiety.
18. The inorganic light emitting device of claim 17 , wherein the orthosilicate moiety comprises a tetramethyl orthosilicate moiety, a tetraethyl orthosilicate moiety, a tetrapropyl orthosilicate, a tetrabutyl orthosilicate, or a tetrakis(2-ethylhexyl) orthosilicate moiety.
19. The inorganic light emitting device of claim 11 , wherein the siloxane matrix comprises a silsesquioxane.
20. The inorganic light emitting device of claim 11 , wherein the plural inorganic luminescent particles include at least one of a quantum dot (QD) and a quantum rod (QR).