| abstract |
The present invention discloses the use of dibenzofurans and dibenzothiophenes having at least one nitrogen-bonded 5-membered heterocyclic ring as a substituent as hosts, blockers and/or charge transport materials in organic electronics. Also disclosed are dibenzofurans and dibenzothiophenes comprising at least one nitrogen-bonded 5-membered heterocyclic ring and at least one carbazolyl group as substituents, processes for their preparation and uses of these compounds in organic electronics. |