Table 2 Device characteristics of the vacuum-deposited OLEDs based on the TADF compounds doped in DPEPO
Compound | Conc. (wt%) | Vona (V) | Lmaxb (cd m−2) | λmaxc (nm) | CIEd (x, y) | EQEmax/100/1000e (%) | Δroll-offf (%) | CEg (cd A−1) | PEh (lm W−1) |
|---|---|---|---|---|---|---|---|---|---|
DPA-BO | 5 | 4.4 | 106 | 443 | 0.15, 0.08 | 11.6/1.3/- | 88 | 5.3 | 3.7 |
10 | 3.7 | 282 | 449 | 0.15, 0.09 | 13.4/4.1/- | 70 | 8.0 | 5.9 | |
15 | 3.5 | 629 | 453 | 0.14, 0.11 | 16.5/6.2/- | 54 | 12.4 | 11.1 | |
20 | 3.3 | 1361 | 454 | 0.14, 0.12 | 17.1/7.0/1.7 | 60 | 14.6 | 13.5 | |
d-DPA-BO | 5 | 4.1 | 138 | 439 | 0.16, 0.08 | 13.1/1.9/- | 85 | 7.3 | 5.5 |
10 | 3.6 | 342 | 446 | 0.15, 0.09 | 15.5/3.7/- | 74 | 11.1 | 9.8 | |
15 | 3.3 | 890 | 450 | 0.15, 0.10 | 15.1/5.6/- | 63 | 13.6 | 12.7 | |
20 | 3.2 | 1511 | 454 | 0.14, 0.11 | 14.6/6.1/2.1 | 59 | 14.0 | 13.7 | |
DPA-d-BO | 5 | 3.9 | 153 | 443 | 0.15, 0.08 | 12.4/3.2/- | 76 | 4.2 | 2.8 |
10 | 3.4 | 451 | 449 | 0.14, 0.09 | 14.1/5.9/- | 60 | 6.8 | 5.0 | |
15 | 3.2 | 1111 | 450 | 0.14, 0.10 | 15.6/7.8/2.4 | 50 | 9.3 | 8.2 | |
20 | 3.2 | 1672 | 453 | 0.14, 0.11 | 14.8/8.6/3.5 | 42 | 9.4 | 7.6 | |
d-DPA-d-BO | 5 | 4.0 | 156 | 443 | 0.16, 0.07 | 13.5/2.1/- | 85 | 7.2 | 5.4 |
10 | 3.6 | 456 | 446 | 0.15, 0.09 | 15.4/4.3/- | 77 | 11.3 | 9.9 | |
15 | 3.3 | 895 | 450 | 0.15, 0.10 | 16.3/6.0/- | 64 | 14.8 | 13.8 | |
20 | 3.2 | 1758 | 454 | 0.15, 0.11 | 12.6/6.5/2.3 | 49 | 12.6 | 12.1 |
