US 12,075,651 B2
Organic electroluminescent devices
Michael Fusella, Lawrenceville, NJ (US); and Nicholas J. Thompson, New Hope, PA (US)
Assigned to Universal Display Corporation, Ewing, NJ (US)
Filed by Universal Display Corporation, Ewing, NJ (US)
Filed on Apr. 4, 2023, as Appl. No. 18/130,549.
Application 18/130,549 is a continuation of application No. 17/524,994, filed on Nov. 12, 2021, granted, now 11,647,647.
Application 17/524,994 is a continuation of application No. 16/685,161, filed on Nov. 15, 2019, granted, now 11,201,313, issued on Dec. 14, 2021.
Claims priority of provisional application 62/772,931, filed on Nov. 29, 2018.
Prior Publication US 2023/0247856 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 50/85 (2023.01); G02B 5/00 (2006.01); H10K 102/00 (2023.01)
CPC H10K 50/85 (2023.02) [G02B 5/008 (2013.01); H10K 2102/351 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic emissive device comprising:
a substrate;
a corrugated outcoupling layer disposed over the substrate;
a first electrode disposed over the corrugated outcoupling layer;
an emissive stack disposed over the first electrode and comprising an organic emissive material configured to emit light having a peak wavelength λ;
a second electrode disposed over the emissive stack; and
at least one additional layer selected from a group consisting of:
an underlayer disposed below the first enhancement layer, the underlayer having a thickness not more than 4 nλ, wherein n is a refractive index of the underlayer; and
an overlayer disposed over the first enhancement layer, the overlayer having a thickness not more than 4 mλ, wherein m is a refractive index of the overlayer;
wherein at least one layer in the organic emissive device functions as a first enhancement layer in the device and comprises a plasmonic material exhibiting surface plasmon resonance that non-radiatively couples to the organic emissive material and transfers excited state energy from the organic emissive material to a non-radiative mode of surface plasmon polaritons of the enhancement layer.