| abstract |
The present invention describes carbazole derivatives of the following formula (1), especially for use as triplet matrix materials in organic electroluminescent devices: [Wherein, in the symbols used, the following applies: Y is in each case, the same or different, CR or N; X is selected from C (R 1 ) 2 , O, S, PR 1 , P (= O) R 1 or BR 1 ; In each case the same or different, at least one group R representing the group of the above formula (2) is present and / And at least one group R 1 representing the group of the above formula (3) or (4) is present. The present invention also relates to processes for the preparation of the compounds according to the invention and to electronic devices comprising such compounds. |