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US 2026/0305167 A1Published application
Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsMichael S. WEAVER, NICHOLAS J. THOMPSON, VADIM ADAMOVICH, JERALD FELDMAN, CHUN LIN
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Abstract
Disclosed is electron/exciton blocking material that is a compound of that is useful in improving the EQE of OLEDs. Also disclosed are OLEDs incorporating the electron/exciton blocking materials in their electron/exciton blocking layers and display devices incorporating such OLEDs.
Claims20
A device comprising:
- a first pixel comprising a first OLED;
- a second pixel comprising a second OLED;
- wherein each OLED independently comprises, sequentially:
- an anode;
- a hole transporting layer comprising a hole transporting material;
- an electron blocking layer (EBL) comprising an electron/exciton blocking material;
- an emissive region comprising an emissive layer (EML) that comprises an emissive dopant;
- and
- a cathode;
- wherein the EML of the first OLED and the EML of the second OLED have different emissive dopants resulting in the two OLEDs having different emission spectra;
- wherein the EBLs of the first and second OLEDs comprise the same electron/exciton blocking material.
8 more elements
Dependencies are inferred from the claim text.