Electroluminescent iridium compounds having red-orange or red emission and devices made with such compounds
View Patent ↗The present invention is generally directed to electroluminescent Ir(III) complexes which have emission maxima in the red-orange to red region of the visible spectrum and devices that are made with the Ir(III) complexes.
1. A compound having the formula IrL 2 Z, wherein L is Formula III, and wherein A=N—CH 3 , R 5 =CF 3 , R 3 ═R 4 ═R 6 =H, α=0, and Z is 2,4-pentanedlonate,
2. An organic electronic device comprising an active layer that comprises the compound of claim 1 .
3. The device of claim 2 wherein the active layer further comprises a diluent.
4. The device of claim 3 wherein the diluent is selected from poly(N-vinyl carbazole); polysilane; 4,4′-N,N′-dicarbazole biphenyl; and tertiary aromatic amines.
5. An active layer comprising at least one compound having Formula II:
IrL 2 Z (II)
wherein:
Z is selected from β-dienolates; and
L is selected from Formulae IV-VII:
wherein:
R 1 is, independently at each occurrence, selected from D, D, C n H 2n+1 , OR 11 , SR 11 , N(R 11 ) 2 , F, C n (H+F) 2n+1 , OC n (H+F) 2n+1 , and OCF 2 Y, or adjacent pairs of R 1 can be joined to form a five- or six-membered ring;
Y is H, Cl, or Br;
R 11 is the same or different at each occurrence and is H or C n H 2n+1 ;
A is N—CH 3 ;
n is an integer from 1 through 12; and
α is 0, 1 or 2;
δ is 0 or an integer from 1 through 4; and
E 1 through E 4 are the same or different and are N or CR 12 , with the proviso that at least one E is N; and
R 12 is the same or different at each occurrence and is selected from H, D, SR 11 , N(R 11 ) 2 , F, C n (H+F) 2n+1 , OC n (H+F) 2n+1 , and OCF 2 Y, or adjacent pairs of R 12 can be joined to form a five- or six-membered ring, with the proviso that at least one of R 12 is selected from D, F, C n (H+F) 2n+1 , OC n (H+F) 2n+1 , and OCF 2 Y.