US 11,991,892 B2
Organic electroluminescent devices containing a near-infrared down-conversion layer
Eric A. Margulies, Philadelphia, PA (US); Nicholas J. Thompson, New Hope, PA (US); Michael Stuart Weaver, Princeton, NJ (US); and Michael Hack, Carmel, CA (US)
Assigned to Universal Display Corporation, Ewing, NJ (US)
Filed by Universal Display Corporation, Ewing, NJ (US)
Filed on May 6, 2021, as Appl. No. 17/313,030.
Application 17/313,030 is a continuation of application No. 16/217,104, filed on Dec. 12, 2018, granted, now 11,139,444.
Claims priority of provisional application 62/597,648, filed on Dec. 12, 2017.
Prior Publication US 2021/0280812 A1, Sep. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 50/125 (2023.01); H10K 59/38 (2023.01)
CPC H10K 50/125 (2023.02) [H10K 59/38 (2023.02)] 9 Claims
OG exemplary drawing
 
1. A device comprising:
a substrate;
an at least one organic light-emitting layer disposed over the substrate; and
at least one near-infrared (NIR) down-conversion layer disposed in a stack with the at least one organic light emitting layer to generate NIR emission from light emitted by the stack,
wherein the at least one NIR down-conversion layer shifts one or more wavelengths of emissions from one or more sub-pixels of the stack, and
wherein an out-of-plane optical density of a sum of the at least one NIR down-conversion layer is selected from the group consisting of: between 0.5-10, and between 10-20, and between 20-100.