NOVELTY - A 4H-imidazo(1,2-a)imidazole derivative (I) is new.    USE - New 4H-imidazo-imidazole derivative is used in hole transport layers or emitting layers of organic electronic devices e.g. electroluminescent devices, stationary visual display units e.g. visual display units of computers, televisions, visual display units in printers, kitchen appliances and advertising panels, illuminations, information panels, and mobile visual display units e.g. visual display units in cell phones, tablet personal computers, laptops, digital cameras, MPEG audio layer-3 players, vehicles and destination displays on buses and trains, illumination units, keyboards, items of clothing, furniture, and wallpaper, and for electrophotographic photoreceptors, photoelectric converters, organic solar cells (organic photovoltaics), switching elements, organic light-emitting FET (OLEFETs), image sensors, and dye lasers (all claimed).    ADVANTAGE - The 4H-imidazo(1,2-a)imidazole derivative provides improved efficiency, stability, manufacturability, and spectral characteristics of electroluminescent devices. The electroluminescent device has low drive voltage, and high lifetime and quantum efficiency.    DETAILED DESCRIPTION - A 4H-imidazo(1,2-a)imidazole derivative of formula (I), is new. Compound (I) is not 9-(1,1';3',1")terphenyl-5'-yl-9H-4b,9,10-triaza-indeno(1,2-a)indene, 10-(3-(3,5-diphenylphenyl)phenyl)-1,8,10-triazatetracyclo(7.7.0.02,7.011,16)hexadeca-2(7),3,5,8,11(16),12,14-heptaene, 2,7-diphenyl-9-(1,1';3',1")terphenyl-5'-yl-9H-4b,9,10-triaza-indeno(1,2-a)indene, 9-(4,6-diphenyl-(1,3,5)triazin-2-yl)-9H-4b,9,10-triaza-indeno(1,2-a)indene, 12-phenyl-12H-4b,11,12-triaza-benzo(5,6)pentaleno(1,2-b)naphthalene, diphenyl-(9-phenyl-9H-4b,9,10-triaza-indeno(1,2-a)inden-2-yl)-amine, and 9-phenyl-2-(9-phenyl-9H-carbazol-3-yl)-9H-4b,9,10-triaza-indeno(1,2-a)indene.    X6=-N=, with X7 being -NR1-;    or X7==N-, with X6 being -NR1-;    R1=-A1-(A2)p-(A3)q-(A4)r-R6;    p,q,r=0 or 1;    A1-A4=6-24C arylene or 2-30C heteroarylene (both optionally substituted by G), optionally interrupted by -(SiR7R8)-;    R6=H, -(SiR20R21R22), or 6-24C aryl or 2-30C heteroaryl (both optionally substituted by G), or halo, ZnX12 or -SnR207R208R209;    R207-R209=H or 1-6C alkyl, where two radicals optionally form a common ring and are optionally branched or unbranched;    X12=halo, OS(O)2CF3, -OS(O)2-aryl, -OS(O)2CH3, -B(OH)2, -B(OY'1)2, group of formula (i), group of formula (ii), -BF4Na, or BF4K;    Y'1=1-10C alkyl;    Y'2=2-10C alkylene;    Y'13,Y'14=H or 1-10C alkyl;    R7,R8,R20-R22=1-25C alkyl, or 6-24C aryl optionally substituted by G;    X1=N or CR9;    X2=N or CR10;    R2-R5,R9,R10=H, 1-25C alkyl optionally substituted by E and/or interrupted by D', or 6-24C aryl or 2-30C heteroaryl (both optionally substituted by G);    R9+R10=optionally substituted ring;    D'=-CO-, -COO-, -S-, -SO-, -SO2-, -O-, -NR65-, -SiR70R71-, -POR72-, -CR63=CR64-, or -CC-;    E=-OR69, -SR69, -NR65R66, -COR68, -COOR67, -CONR65R66, -CN, or halo;    G=E, or 1-18C alkyl, 6-24C aryl optionally substituted by F, 1-18C alkyl optionally interrupted by O, 2-30C heteroaryl optionally substituted by F, or 1-18C alkyl optionally interrupted by O;    R63-R69=6-18C aryl optionally substituted by 1-18C alkyl or 1-18C alkoxy, or 1-18C alkyl optionally interrupted by -O-;    R65+R66=5- or 6-membered ring;and    R70,R71,R72=1-18C alkyl or 6-18C aryl optionally substituted by 1-18C alkyl.    INDEPENDENT CLAIMS are included for the following:    (1) hole transport layer or emitting layer comprising compound (I); and    (2) manufacture of compound (I).