| 摘要 |
A compound comprising a ligand LA selected from:;;as well as, devices and formulations containing the compound are disclosed. In the compounds, X1-X6, are CH or N; Y1-Y12 are independently selected from CH, N, and C-APR1′R1″; when present, exactly one of Y1 through Y12 is C-APR1′R1″ in LA8; A is selected from a single bond, —CRARB—, —NRA—, —O—, —S— and —SiRARB—; and R, R1′, R1″, R2, R3, RA, and RB are each independently a substitutent selected from hydrogen, deuterium, alkyl, cycloalkyl, aryl, and weight of at least 40. |
| 主权项 |
1. A compound comprising a ligand LA selected from the group of ligands consisting of: wherein X1, X2, X3, X4, X5, and X6 are independently selected from the group consisting of CH and N; wherein Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, and Y12 are independently selected from the group consisting of CH, N, and C-APR1′R1″, wherein exactly one of Y1 through Y8 is C-APR1′R1″ in LA3, LA5, and LA6; wherein exactly one of Y1 through Y10 is C-APR1′R1″ in LA7; wherein exactly one of Y1 through Y12 is C-APR1′R1″ in LA8; wherein A is selected from the group consisting of a single bond, —CRARB—, —NRA—, —O—, —S— and —SiRARB—; wherein R, R1′, R1″, R2, R3, RA, and RB are each independently a substitutent selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, aryl, and combinations thereof; wherein adjacent substituents of R1, R2 or R3 are optionally joined to form a fused ring; wherein a P-atom of the ligand LA is bonded to a metal M having an atomic weight of at least 40; and wherein the ligand LA is optionally linked with other ligands to comprise a bidentate, tridentate, tetradentate, pentadentate or hexadentate ligand. |
