Organic electroluminescent device
View Patent ↗An organic electroluminescent device includes an optical substrate, a transparent electrode, an organic electroluminescent structure, and a back electrode. The optical substrate includes a base and a plurality of scattering particles. The scattering particles are mixed in the base. The transparent electrode is directly disposed on the optical substrate. The organic electroluminescent structure is disposed on the transparent electrode. The back electrode is disposed on the organic electroluminescent structure.
1. An organic electroluminescent device comprising:
an optical substrate comprising:
a base; and
a plurality of scattering particles mixed in the base, wherein the optical substrate has a haze, a reflectance, and a transmittance, and the haze, the reflectance, and the transmittance of the optical substrate satisfy the following condition:
15%<Haze× R ×( R+T )<35%,
where Haze is the haze of the optical substrate, R is the reflectance of the optical substrate, and T is the transmittance of the optical substrate;
a transparent electrode directly disposed on the optical substrate;
an organic electroluminescent structure disposed on the transparent electrode; and
a back electrode disposed on the organic electroluminescent structure.
2. The organic electroluminescent device of claim 1 , wherein the material of the base is a polymer.
3. The organic electroluminescent device of claim 1 , wherein a refractive index of the base is greater than approximately 1.5.
4. The organic electroluminescent device of claim 1 , wherein a refractive index of the plurality of scattering particles is greater than approximately 1.4.
5. The organic electroluminescent device of claim 1 , wherein an average diameter of each of the scattering particles is approximately 0.8 to 1 μm.
6. The organic electroluminescent device of claim 1 , wherein the optical substrate further comprises:
an outer barrier disposed on an outer surface of the base facing away from the transparent electrode.
7. The organic electroluminescent device of claim 6 , wherein the outer barrier is further extended to at least a side surface of the base.
8. The organic electroluminescent device of claim 6 , wherein the outer barrier is further extended to two opposite side surfaces of the base.
9. The organic electroluminescent device of claim 6 , wherein the outer barrier comprises:
an inorganic atomic layer disposed on an outer surface of the base.
10. The organic electroluminescent device of claim 6 , wherein the outer barrier comprises:
an inorganic layer disposed on an outer surface of the base; and
an organic layer disposed on an outer surface of the inorganic layer facing away from the base.
11. The organic electroluminescent device of claim 1 , wherein the optical substrate further comprises:
an inner barrier disposed on an inner surface of the base facing the transparent electrode.
12. An organic electroluminescent device comprising:
an optical substrate, wherein the optical substrate has a haze, a reflectance, and a transmittance, and the haze, the reflectance, and the transmittance of the optical substrate satisfy the following condition:
15%<Haze× R ×( R+T )<35%,
where Haze is the haze of the optical substrate, R is the reflectance of the optical substrate, and T is the transmittance of the optical substrate;
a transparent electrode directly disposed on the optical substrate;
an organic electroluminescent structure disposed on the transparent electrode; and
a back electrode disposed on the organic electroluminescent structure.
13. The organic electroluminescent device of claim 12 , wherein the optical substrate comprises:
a macromolecule base; and
a plurality of scattering particles mixed in the macromolecule base.
14. The organic electroluminescent device of claim 13 , wherein a refractive index of the macromolecule base is greater than approximately 1.5.
15. The organic electroluminescent device of claim 13 , wherein a refractive index of the plurality of scattering particles is greater than approximately 1.4.
16. The organic electroluminescent device of claim 13 , wherein an average diameter of each of the scattering particles is approximately 0.8 to 1 μm.
17. The organic electroluminescent device of claim 13 , wherein the optical substrate further comprises:
an outer barrier disposed on an outer surface of the macromolecule base facing away from the transparent electrode.
18. The organic electroluminescent device of claim 17 , wherein the outer barrier is further extended to at least a side surface of the macromolecule base.
19. The organic electroluminescent device of claim 13 , wherein the optical substrate further comprises:
an inner barrier disposed on an inner surface of the macromolecule base facing the transparent electrode.