Universal Display Corporation

Mahesh Paudyal

Tyler Fleetham

Joseph A Macor

Muazzam Idris

Jason Brooks

Hsiao-Fan Chen

Geza Szigethy

Douglas Williams

Rasha Hamze

Elena Sheina

Neil Palmer

Provided are compounds having the structure of Formula I: wherein rings A, B, and D are each independently a 5-membered or 6-membered carbocyclic or heterocyclic ring; X-Xare each independently C or N; Yis selected from the group consisting of a direct bond, O, S, Se, NR, SiRR', CRR′, and P(O)R; R, R′, R, R, R, and Reach independently represents mono to the maximum allowable substitution, or no substitution; each R, R′, R, R, R, and Ris independently a hydrogen or a substituent; and any two adjacent groups of R, R, R, and Rmay be joined or fused to form a ring Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Organic electroluminescent materials and devices

Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

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Middletown, DE, United States of America

Mahesh Paudyal