| abstract |
The invention relates to phosphorescent organic light-emitting diodes (OLEDs) comprising a hole-transport or hole-transport and electron-blocking layer comprising N,N,N',N'-tetraaryl-phenylene-3,5- Diamine or N,N,N',N'-tetraaryl-1,1'-biphenyl-3,3'-diamine matrix compounds; and related to use as hole-transport and electron-blocking layers in phosphorescent OLEDs New N,N,N',N'-tetraaryl-substituted meta-arylenediamine compounds of substrates. |