公开(公告)号：US20230337522A1

公开(公告)日：2023-10-19

申请号：US18297781

申请日：2023-04-10

Applicant: UNIVERSAL DISPLAY CORPORATION

Inventor： Wei-Chun Shih ,  Tyler Fleetham ,  Eric A. Margulies ,  Jui-Yi Tsai ,  Pierre-Luc T. Boudreault ,  Rasha Hamze ,  Walter Yeager ,  Alexey Borisovich Dyatkin ,  Sarwat Chowdhury

IPC: H10K85/30 ,  C07F15/00 ,  C09K11/06

CPC classification number: H10K85/342 ,  C07F15/0033 ,  C09K11/06 ,  C09K2211/185 ,  C09K2211/1029 ,  C09K2211/1044 ,  H10K50/11

Abstract: Provided is a compound having a formula of Ir(LA*)m(LB*)n(LC*)p; wherein



each LA, LB, and LC is independently a monoanionic bidentate ligand and different from each other;
n and p each is independently 0, 1, or 2; m is 1 or 2; and m+n+p is 3;
a free-state of LA has a first triplet energy T1 of EA at 77K;
a free-state of LB has a first triplet energy T1 of EB at 77K;
a free-state of LC has a first triplet energy T1 of EC at 77K;
EA is less than EB and EC whichever EB and EC is present;
LA comprises at least one π-electron deficient electron-withdrawing group; and
the compound has an emission spectrum with a FWHM value of no more than 45 nm.




Also provided is a compound comprising a first ligand LA having a structure of Formula I,




wherein the variables are defined herein.