| abstract |
This application relates to organic electroluminescent materials and devices. A compound useful as a host material in an OLED is provided. The compound includes at least one chemical group selected from the group consisting of triphenylene, carbazole, indolocarbazole, dibenzothiophene, dibenzofuran, dibenzoselenophene, aza-triphenylene Benzene, azacarbazole, aza-indolocarbazole, aza-dibenzothiophene, aza-dibenzofuran and aza-dibenzoselenophene; wherein said compound is selected from at least one of R substitution of the group consisting of: alkyl, cycloalkyl, spiroalkyl, partially or fully deuterated variants thereof, partially or fully fluorinated variants thereof, and combinations thereof. |