TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Components: The active layer further comprises: a host material having a structure of formula (An-L-An) or (A-An-A), or substituted anthracene compound of formula (a1), preferably 9-naphthalen-2-yl-10-(4-naphthalen-1-yl-phenyl)-anthracene and/or 9-(4-naphthalen-1-yl-phenyl)-10-(4-naphthalen-2-yl-phenyl)-anthracene.An = anthracene moiety;A = aromatic group; andL = divalent connecting layer. Preferred Definitions:    R1, R5, R7-R11 = H; either    R2 = H; and    R3 = alkyl; or    R2R3 = cyclopentyl or cyclohexyl; and    Ar1-Ar4 = phenyl (preferred), biphenyl, naphthyl or binaphthyl (all optionally substituted).    SPECIFIC COMPOUNDS - 9 Compounds (I) are disclosed e.g. 3-tert-butyl-N6,N6,N12,N12-tetrakis(3,4-dimethylphenyl)-chrysene-6,12-diamine, 3,3'-(3-tert-butylchrysene-6,12-diyl)bis((3,4-dimethylphenyl)azanediyl)-dibenzonitrile, 3-tert-butyl-N6,N12-bis(4-tert-butylphenyl)-N6,N12-bis(3,4-dimethylphenyl)chrysene-6,12-diamine, N6,N12-bis(biphenyl-4-yl)-3-tert-butyl-N6,N12-bis(4-tert-butylphenyl)chrysene-6,12-diamine and 3-iso-propyl-N6,N6,N12,N12-tetrakis(3,4-dimethylphenyl)-chrysene-6,12-diamine of formula (Ia).    EXAMPLE - (Z)-1-(4-Isopropylstyryl)naphthalene (4 g) was dissolved in dry carbontetrachloride (1 l) in a photochemical vessel (1 l). The reaction mixture was irradiated with the halogen lamp for 4 hours. Volatiles were removed under vacuum and the resulting solids were extracted with toluene to give 3-iso-propylchrysene. The 3-iso-propylchrysene was brominated to give 6,12-dibromo-3-iso-propylchrysene. The 6,12-dibromo-3-iso-propylchrysene (0.55 g) and bis(3,4-dimethylphenyl)amine (0.593 g) were combined in a thick-walled glass tube and dissolved in toluene (15 ml). Tris(tert-butyl)phosphine (0.052 g) and tris(dibenzylideneacetone)dipalladium(0) (0.118 g) were added next, followed by sodium tert-butoxide (0.296 g) and dry toluene (5 ml). Glass tube was sealed, brought out of the box and placed into a 100 degrees C oil bath for 24 hours. The reaction mixture was cooled to room temperature, diluted with dichloromethane (80 ml) and filtered through a plug of celite and silica. The plug was washed with additional dichloromethane (200 ml). Filtrates were combined and volatiles were removed under reduced pressure to give 3-iso-propyl-N6, N6, N12, N12-tetrakis(3,4-dimethylphenyl)-chrysene-6,12-diamine (750 mg, 81%).