Method and system for an organic light emitting diode structure
View Patent ↗Disclosed is a system and method for a nano-pillar geometry for increased light extraction properties of an Organic Light Emitting Diode.
1. An organic light emitting diode structure, said structure comprising:
a first layer; and
a second layer;
wherein said first layer and said second layer are adjacent to each other and said second layer comprises a plurality of spaced inverted non-cylindrical nano-pillars.
2. The structure of claim 1 , wherein said plurality of non-cylindrical nano-pillars comprises a plurality of inverted pyramidal nano-pillars.
3. The structure of claim 1 , wherein said plurality of non-cylindrical nano-pillars comprises a plurality of inverted conical nano-pillars.
4. The structure of claim 1 , wherein said first layer comprises an electron blocking layer.
5. The structure of claim 1 , wherein said second layer comprises an emissive layer.
6. The structure of claim 1 , wherein said first layer comprises a conductive layer and said second layer comprises an emissive layer.
7. The structure of claim 1 , wherein said structure further comprises:
a hole injection layer, a hole blocking layer, an electron transport layer and an electron injection layer.
8. The structure of claim 1 , wherein said plurality of spaced inverted non-cylindrical nano-pillars are generated by the isotropic etching of said second layer.
9. A method of fabricating a structure for an organic light emitting diode comprising a first layer and a second layer situated adjacent to each other, said method comprising:
etching said second layer to produce a plurality of spaced inverted non-cylindrical nano-pillars.
10. The method of claim 9 , wherein said plurality of non-cylindrical nano-pillars comprises a plurality of inverted pyramidal nano-pillars.
11. The method of claim 9 , wherein said plurality of non-cylindrical nano-pillars comprises a plurality of inverted conical nano-pillars.
12. The method of claim 9 , wherein said first layer comprises an electron blocking layer.
13. The method of claim 9 , wherein said second layer comprises an emissive layer.
14. The method of claim 9 , wherein said first layer comprises a conductive layer and said second layer comprises an emissive layer.
15. The method of claim 14 , wherein said plurality of non-cylindrical nano-pillars comprises a plurality of inverted pyramidal nano-pillars.
16. An apparatus comprising an organic light emitting diode structure, said organic light emitting diode structure comprising:
a first layer; and
a second layer;
wherein said first layer and said second layer are adjacent to each other and said first or second layer comprises a plurality of spaced inverted noncylindrical nano-pillars.
17. The apparatus of claim 16 , wherein said apparatus is a display device.
18. The apparatus of claim 16 , wherein said apparatus is one of a digital television, mobile phone, PDA, and a car infotainment system.
19. The apparatus of claim 16 , wherein said plurality of non-cylindrical nano-pillars comprises one of a plurality of inverted pyramidal nano-pillars and a plurality of inverted conical nano-pillars.