TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The organic layer comprises: arylamine compounds and/or styrylarylamine compounds; and one or more metals of organic metals of group 1, group 2, 4th period or 5th period transition metals, lanthanide metals or d-transition elements. The organic layer comprises a charge generating layer as well as an electroluminescent layer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises: reacting a heterocyclic compound of formula (g1) with a phthalic acid dimethyl ester compound of formula (g2) to give a heterocyclic carbonyl methyl ester compound of formula (g3); cyclizing (g3) to give a heterocyclic dicarbonyl compound of formula (g4); reducing (g4) to give a substituted tricyclic heteroaryl compound of formula (g5); reacting (g5) with N-bromosuccinamide to give a bromo substituted tricyclic heteroaryl compound of formula (g6); reacting (g6) with an aryl boronic acid compound of formula (Ar1-B(OH)2) to give an aryl substituted tricyclic heteroaryl compound of formula (g7); reacting (g7) with N-bromosuccinamide to give a bromo-aryl substituted tricyclic heteroaryl compound of formula (g8); and reacting (g8) with an aryl compound of formula (H-X-Ar2) to give (I). Preferred Definitions:    Ar1, Ar2 = 54 aryl or heterocyclic groups e.g. phenyl, naphthyl, biphenyl, cyclohexyl, perylenyl, pyridinyl, quinolinyl, 9H-carbazolyl, anthracenyl, terphenyl, pyrenyl, pyrimidinyl, pyridazinyl, (1,3,5)-triazinyl, pyrazinyl, fluoranthenyl, piperidinyl, triphenylenyl, (1,10)phenanthrolinyl, 1,2,3,4-tetrahydro-quinolinyl, 10,11-dihydro-5H-dibenzo(b,f)azepinyl, 5H-dibenzo(b,f)azepinyl, acenaphthenyl, chrysenyl, quinoxalinyl, or adamantyl (all optionally substituted).    SPECIFIC COMPOUNDS - 657 Compounds (I) are disclosed e.g. 5-phenoxy-10-phenyl-benzo(g)isoquinoline of formula (Ia), 5-(naphthalen-2-yloxy)-10-phenyl-benzo(g)isoquinoline, 5-(naphthalen-1-yloxy)-10-phenyl-benzo(g)isoquinoline, 5-(biphenyl-4-yloxy)-10-phenyl-benzo(g)isoquinoline and 10-phenyl-5-p-tolyloxy-benzo(g)isoquinoline.    EXAMPLE - 10-Bromo-benzo(g)isoquinoline (4.8 g), phenylboronic acid (2.4 g) and tetrakispalladium(0) triphenylphosphine (2.8 g) were dissolved in toluene (150 ml) and ethanol (80 ml), and aqueous 2M sodium carbonate solution (80 ml) was added. After stirring under reflux at 120 degrees C for 4 hours, the temperature was lowered to 25 degrees C and worked up to give 10-phenyl-benzo(g)isoquinoline. 10-Phenyl-benzo(g)isoquinoline (4.3 g) and N-bromosuccinimide (3.6 g) were dissolved in dichloromethane (100 ml) under nitrogen atmosphere, and the solution was stirred at 25 degrees C for one day and worked up to give 5-bromo-10-phenyl-benzo(g)isoquinoline. Reaction vessel was charged with 5-bromo-10-phenyl-benzo(g)isoquinoline (4.7 g), phenol (4 g) and potassium hydroxide (2.4 g), and the mixture was stirred with heating at 230 degrees C for 6 hours. When the reaction was completed, the mixture was cooled to room temperature and worked up to give 5-phenoxy-10-phenyl-benzo(g)isoquinoline (2.73 g).