US 11,844,230 B2
Spectrally tunable stacked OLED
Jeffrey Spindler, Ontario, NY (US); and Marina Kondakova, Kendall, NY (US)
Assigned to OLEDWorks LLC, Rochester, NY (US)
Filed by OLEDWorks LLC, Rochester, NY (US)
Filed on Feb. 10, 2021, as Appl. No. 17/172,398.
Claims priority of provisional application 62/990,729, filed on Mar. 17, 2020.
Prior Publication US 2021/0296607 A1, Sep. 23, 2021
Int. Cl. H10K 50/13 (2023.01); H10K 50/11 (2023.01); H10K 50/81 (2023.01); H10K 50/82 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/131 (2023.02) [H10K 50/11 (2023.02); H10K 50/81 (2023.02); H10K 50/82 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2102/3035 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A spectrally-tunable OLED lighting device comprising:
a blue light-emitting unit with a blue-light fluorescent, phosphorescent or TADF (thermally active delayed fluorescent) emitter;
a yellow light-emitting electroluminescent unit comprising a green phosphorescent emitter, a red phosphorescent emitter and at least one non-emitting host; wherein
the blue light-emitting unit and the yellow light-emitting unit are separated by an undoped mixed interlayer with two organic non-emitting charge-carrier materials in a single layer; the charge-carrier materials consisting of only one hole-transporting material and only one electron-transporting material, wherein the charge-carrier materials are not electron- or hole-generating materials nor materials that form a charge-transfer complex; and the mixed interlayer contains essentially no other materials.