| 摘要 |
A matrix material for an organic electroluminescent device, comprising substituted aromatic molecules for hole and/or electron conduction with at least 2 aromatic molecule components joined to one another via a carbon-carbon single bond which as individual molecule components respectively have a first triplet level with an excitation energy of more than 23,000 cm<SUP>-1 </SUP>and which respectively comprise at least one substituent in an ortho position with respect to the carbon-carbon single bond, the substituents incorporated in the ortho position causing a rotation of neighboring molecule components along the carbon-carbon single bond as a rotation axis owing to their size.
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