TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Components: The organic layer further comprises at least one arylamine compounds or styrylarylamine compounds, or at least one organometals of group 1, group 2, fourth period and fifth period transition metals, lanthanide metals and d-transition elements. The organic layer comprises an electroluminescent layer and a charge generating layer. Preferred Definitions:    A = bond or 43 (hetero)arylene moieties e.g. phenyl, pyridinyl, pyrimidinyl, (1,3,5)triazinyl, thiophenyl, furanyl, (1,3,4)thiadiazolyl, (1,3,4)oxadiazolyl, (1,3,4)selenadiazolyl, thieno(3,4-b)pyrazinyl, 2-selena-4,7-diaza-indenyl, pyrenyl, (1,10)phenanthrolinyl, pyridazinyl, pyrazinyl, quinoxalinyl, quinolinyl, anthracenyl, fluoranthenyl, triphenylenyl, acridinyl, benzofuranyl, benzo(b)thiophenyl and (II);    (-N(R1)(R2)) = 10,11-dihydro-5H-dibenzo(b,f)azepinyl, 5H-dibenzo(b,f)azepinyl, 9,10-dihydro-acridinyl moiety of formula (VIII), 10H-phenoxazinyl, 10H-phenothiazinyl, 5,10-dihydro-phenazinyl moiety of formula (IX) or 9H-carbazolyl; and either    R31-R33 = H, 1-60C alkyl or 6-60C aryl; or    R31-R32 optionally with fused ring linked via 3-12C alkylene or 3-12C alkenylene = form a fused ring.    SPECIFIC COMPOUNDS - 580 Compounds (I) are disclosed e.g. (7-((E)-2-(9,9-diphenyl-9H-fluoren-4-yl)-vinyl)-9,9-dimethyl-9H-fluoren-2-yl)-diphenyl-amine of formula (Ia), (7-((E)-2-(6,7-diphenyl-naphthalen-2-yl)-vinyl)-9,9-dimethyl-9H-fluoren-2-yl)-diphenyl-amine, (7-((E)-2-(3-biphenyl-4-yl-naphthalen-2-yl)-vinyl)-9,9-dimethyl-9H-fluoren-2-yl)-diphenyl-amine, (7-((E)-2-(1,4-diphenyl-naphthalen-2-yl)-vinyl)-9,9-diethyl-9H-fluoren-2-yl)-diphenyl-amine, (7-((E)-2-(5,8-diphenyl-naphthalen-1-yl)-vinyl)-9,9-dimethyl-9H-fluoren-2-yl)-diphenyl-amine.    EXAMPLE - 7-Diphenylamino-9,9-dimethyl-9H-fluorene-2-carbaldehyde (6 g) and sodium borohydride (2.3 g) were dissolved in ethanol (156 ml), in a round-bottomed flask, and the solution was heated under reflux for 3 hours. When the reaction was completed, the solution contained in the flask was poured into ice water, and the mixture was extracted with ether. After drying over anhydrous magnesium sulfate, the organic residue was purified to obtain (7-((E)-2-(9,9-diphenyl-9H-fluoren-4-yl)-vinyl)-9,9-dimethyl-9H-fluoren-2-yl)-diphenyl-amine (99.5% yield).