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EP-3602647-B1 - TOP-EMITTING ORGANIC LIGHT-EMITTING DEVICE AND COMPONENT THEREOF

EP3602647B1EP 3602647 B1EP3602647 B1EP 3602647B1EP-3602647-B1

Inventors

  • WANG, DAN

Dates

Publication Date
20260513
Application Date
20171010

Claims (14)

  1. A component (591) of top-emitting organic light-emitting device (500) comprising: an anode (1); a light-emitting layer (2) over the anode (1); a cathode (3) over the light-emitting layer (2); a light extraction layer (4) over the cathode (3), a material of the light extraction layer (4) including an inorganic material; and an encapsulation layer (5) over the light extraction layer (4), wherein the encapsulation layer (5) includes an organic sub-layer, characterized in that , a material of the organic sub-layer includes a corrugated polymer, and the corrugated polymer has a periodic wrinkle structure.
  2. The component according to claim 1, wherein the inorganic material includes a metal oxide.
  3. The component according to claim 2, wherein the metal oxide includes at least one of an aluminum oxide, a zinc oxide, a zirconium oxide, or a titanium oxide.
  4. The component according to claim 1, wherein the encapsulation layer (5) has a laminated structure and includes: a first organic sub-layer (501) over the light extraction layer (4), a first inorganic sub-layer (502) over the first organic sub-layer (501), and a second organic sub-layer (503) over the first inorganic sub-layer (502), a material of the second organic sub-layer (503) including the corrugated polymer.
  5. The component according to claim 4, wherein a material of the first organic sub-layer (501) includes an epoxy resin.
  6. The component according to claim 4, wherein a material of the first inorganic sub-layer (502) includes at least one of a silicon oxide, a silicon nitride, or a silicon oxynitride.
  7. The component according to claim 1, wherein: the corrugated polymer includes at least one of polystyrene, polymethylmethacrylate, or phenolic resin.
  8. The component according to claim 4, wherein: a thickness of the first organic sub-layer (501) ranges from 1 µm to 8 µm, and a refractive index of the first organic sub-layer (501) is 1.56; optionally, a thickness of the first inorganic sub-layer (502) is 800 nm, and a refractive index of the first inorganic sub-layer (502) is 1.84; optionally, a thickness of the second organic sub-layer (503) ranges from 1 µm to 8 µm.
  9. The component according to claim 1, wherein: a refractive index of the light extraction layer (4) ranges from 1.7 to 2.1, and a thickness of the light extraction layer (4) is 50 nm.
  10. The component according to claim 1, wherein a thickness of the organic sub-layer ranges from 1 µm to 8 µm; optionally, the light extraction layer (4) is deposited by atomic layer deposition; optionally, the encapsulation layer (5) further includes a second inorganic sub-layer (505) between the light extraction layer (4) and the organic sub-layer, and a material of the second inorganic sub-layer (505) includes at least one of a silicon oxide, a silicon nitride, or a silicon oxynitride.
  11. The component according to claim 10, wherein: the encapsulation layer (5) further includes an additional inorganic sub-layer (506) over the organic sub-layer, and a material of the additional inorganic sub-layer (506) over the organic sub-layer includes at least one of a silicon oxide, a silicon nitride, or a silicon oxynitride.
  12. A top-emitting organic light-emitting diode (500), comprising the component according to any one of claims 1-11.
  13. A method for fabricating a component (591) of top-emitting organic light-emitting diode (500), comprising: forming (S801) an anode (1) over a substrate (592); forming (S802) a light-emitting layer (2) over the anode (1); forming (S803) a cathode (3) over the light-emitting layer (2); forming (S804) a light extraction layer (4) over the cathode (3), a material of the light extraction layer (4) including an inorganic material; and forming (S805) an encapsulation layer (5) over the light extraction layer (4), wherein the encapsulation layer (5) includes an organic sub-layer, characterized in that , a material of the organic sub-layer includes a corrugated polymer, and the corrugated polymer has a periodic wrinkle structure.
  14. The method according to claim 13, wherein forming the light extraction layer (4) includes: depositing the light extraction layer (4) over the cathode (3) by atomic layer deposition.

Description

TECHNICAL FIELD The present disclosure generally relates to the field of organic electroluminescent display technology and, more particularly, to a component of top-emitting organic light-emitting diode (OLED) device and a top-emitting OLED device. BACKGROUND Organic Light-Emitting Diode (OLED) devices may become next generation display devices as substitutes for liquid crystal display devices, for having advantages of, e.g., active light-emitting capability, good temperature characteristics, low power consumption, fast response, flexibility, ultra-thin thickness, and low cost. OLED flat panel display technology is moving toward a phase at which mass production technology is increasingly mature and market demand is rapidly growing. In the existing technology, a small organic molecule material used in a light extraction layer in an OLED device may be sensitive to moisture and oxygen. Further, the light extraction layer and a thin film encapsulation (TFE) layer above the light extraction layer may have a poor refractive index matching, resulting in a loss of light through the TFE layer. US 20120256202A1 discloses an organic light emitting diode (OLED) display including: a substrate; an organic light emitting element on the substrate and including a first electrode, a light emission layer, and a second electrode; and an encapsulation layer on the substrate while covering the organic light emitting element. EP 3041061A1 discloses an organic light emitting diode (OLED) display device including: a substrate; a first electrode on the substrate; a light emitting layer on the first electrode; an auxiliary light emitting layer on the light emitting layer; a second electrode on the auxiliary light emitting layer; and a resonance inducing layer on the second electrode. US 20140264311A1 discloses a light-emitting component which may include: an electrically active region, including a first electrode, a second electrode, an organic functional layer structure between the first electrode and the second electrode, a cover arranged above the electrically active region, and a layer structure arranged between the cover and the electrically active region. CN104425542A discloses an organic light-emitting display apparatus. EP2949388 A1 discloses a method of self-assembling a pleated membrane from a block-copolymer. KR 2016 0033921 A discloses an OLED with a light extraction layer that comprises a polymer with a periodic wrinkle structure. SUMMARY In one aspect, the present disclosure provides a component of top-emitting organic light-emitting device according to claim 1. The component includes an anode, a light-emitting layer over the anode, a cathode over the light-emitting layer, a light extraction layer over the cathode, and an encapsulation layer over the light extraction layer. A material of the light extraction layer includes an inorganic material. BRIEF DESCRIPTION OF THE FIGURES The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present disclosure. FIG. 1 illustrates a schematic view of an exemplary component of top-emitting organic light-emitting diode (OLED) device, not according to the claimed invention;FIG. 2 illustrates a schematic view of another exemplary component of top-emitting OLED device according to various disclosed embodiments of the claimed invention;FIG. 3 illustrates a schematic view of another exemplary component of top-emitting OLED device according to various disclosed embodiments of the claimed invention;FIG. 4 illustrates a schematic view of another exemplary component of top-emitting OLED device according to various disclosed embodiments of the claimed invention;FIG. 5 illustrates a schematic view of an exemplary top-emitting OLED device according to various disclosed embodiments of the claimed invention;FIG. 6 illustrates a comparison between optical output results of an exemplary component of top-emitting OLED device and a reference component of top-emitting OLED device;FIG. 7 illustrates a view of luminance versus thickness of epoxy resin layer;FIG. 8 illustrates a comparison between optical output results of another exemplary component of top-emitting OLED device and a reference component of top-emitting OLED device;FIG. 9 illustrates a view of current efficiency versus thickness of epoxy resin layer;FIG. 10 illustrates a comparison between optical output results of another exemplary component of top-emitting OLED device and a reference component of top-emitting OLED device;FIG. 11 illustrates a view of luminance versus thickness of corrugated polymer layer;FIG. 12 illustrates a flow chart of an exemplary fabrication method for an exemplary component of top-emitting organic light-emitting device, not according to the claimed invention;FIG. 13 illustrates a flow chart of another exemplary fabrication method for an exemplary component of top-emitting organic light-emitting device according