TECHNOLOGY FOCUS - ELECTRONICS - Preferred Layers: The organic layer includes hole injection layer (3) or hole transport layer (4) containing compound (I), and a light-emitting layer (5) containing compound (I) as host material, and an electron transport layer (6) containing compound (I). The hole implant layer or hole transport layer contains compound having arylamino group, carbazolyl group, or benzcarbazolyl group. The organic layer contains an organometallic compound as dopant.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A diaryl compound of formula (A) is reacted with ammonium acetate and a diketo derivative of formula: C(-R1)(=O)-C(-R2)(=O), to obtain a diaryl derivative of formula (B) having imidazole group. Compound (B) is subjected to intramolecular cyclization in the presence of palladium catalyst, to obtain compound (I). Preferred Compounds: Compound (I) is preferably chosen from compounds of formulae (II-V).R11,R12=R3;n1=0-6;k1,k2=0-4;andn2,k3=0-2.The nitrogen atom of (N)n1 or (N)n2 can replace carbon atom in benzene ring. Preferred Definitions:    R1,R2=optionally substituted aryl or heterocyclyl.    SPECIFIC COMPOUNDS - 641 Compounds (I) are specifically claimed e.g. 6-(10-naphthalen-2-yl-anthracen-9-yl)-8b,13-diaza-indeno(1,2-l)phenanthrene of formula (IA), 6-phenyl-8b,13-diaza-indeno(1,2-l)phenanthrene, 3-phenyl-8b,13-diaza-indeno(1,2-l)phenanthrene, 11-phenyl-8b,13-diaza-indeno(1,2-l)phenanthrene, and 10-(2,2')binaphthalenyl-6-yl-2,3-diphenyl-imidazo(1,2-f)phenanthridine.    EXAMPLE - (In g) 9-bromo-10-(2-naphthyl)anthracene (3.83) and 6-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-8b,13-diaza-indeno(1,2-l)phenanthrene (3.94) were dissolved in tetrahydrofuran (100 mL). 2M Potassium carbonate aqueous solution (20 mL) was added, followed by addition of tetrakistriphenylphosphine palladium (231 mg), and stirred and refluxed for 5 hours. The temperature was reduced to room temperature, and the reaction mixture was filtered. The solid was recrystallized using chloroform and ethanol, and dried to obtain 6-(10-naphthalen-2-yl-anthracen-9-yl)-8b,13-diaza-indeno(1,2-l)phenanthrene (3.88) of formula (IA) with a yield of 68%. An organic electronic device obtained using the compound had excellent luminous efficiency, thermal stability, and durability, and low drive voltage.