| abstract |
The present invention relates to an organic light emitting diode (OLED) comprising at least one substantially organic layer comprising 1,N,N,N',N'-penta(1,1'-biphenyl-4- base)-phenylene-3,5-diamine matrix compound; and the present invention relates to new 1,N,N,N',N'-penta(1,1'-biphenyl-4-yl)-substance Phenyl-3,5-diamine compounds which are in particular useful as hole-transport and/or electron-blocking layer substrates in OLEDs. |