| 摘要 |
Compounds comprising a 3,9-linked oligocarbazole moiety and a dibenzothiophene, dibenzofuran, dibenzoselenophene, aza-dibenzothiophene, aza-dibenzofuran, or aza-dibenzoselenophene are provided. The 3,9-linked oligocarbazole and dibenzo or aza-dibenzo moiety are separated by an aromatic spacer. The compounds may be used as non-emissive materials for phosphorescent OLEDs to provide devise having improved performance. |
| 主权项 |
1. A compound having the formula: wherein n is 1-20; wherein R′1, R′2, R′3, and R′4 are hydrogen; wherein Ra is hydrogen or aryl; wherein Rb is hydrogen; wherein X is wherein A, B, C, and D are independently selected from the group consisting of: wherein A, B, C, and D are, optionally, further substituted with Ra, wherein each of p, q, r, and s are 0, 1, 2, 3, or 4, and wherein p+q+r+s is at least 1; and wherein Y is dibenzothiophene, dibenzofuran, dibenzoselenophene, aza-dibenzothiophene, aza-dibenzofuran, or aza-dibenzoselenophene that is further substituted with Rb. |
