TECHNOLOGY FOCUS - ELECTRONICS - Preferred Layers: The organic layer is hole implant layer (3), hole transport layer (4), light-emitting layer (5), electron injection layer, and/or electron transport layer (6). Full Definitions:    X1-X6=C or N, with at least one of X1-X5 being N;    at least one of R1-R10=-L1-Ar1, with the remaining being chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 6-40C aryl optionally substituted with group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 2-40C heteroaryl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, amino optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl;    substituents of R1-R10=condensed or non-condensed ring;    L1=direct bond, or 2-40C alkenylene optionally substituted by group(s) chosen from 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 6-40C aryl, and 2-40C heteroaryl, 6-40C arylene optionally substituted by group(s) chosen from halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 6-40C arylamino optionally substituted by group(s) chosen from 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 25-40C spiro group optionally substituted by group(s) chosen from halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 25-40C opened spiro group optionally substituted by group(s) chosen from halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl;and    Ar1=H, deuterium, 1-40C alkyl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 3-40C cycloalkyl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 2-40C alkenyl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 3-40C alkoxy optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, amino optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 6-40C aryl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 2-40C heteroaryl optionally substituted by group(s) chosen from H, deuterium, halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl, 25-40C spiro optionally substituted by group(s) chosen from 6-40C aryl and 2-40C heteroaryl, and 25-40C opened spiro optionally substituted by group(s) chosen from halo, amino, nitrile, nitro, 1-40C alkyl, 2-40C alkenyl, 1-40C alkoxy, 3-40C cycloalkyl, 2-40C heterocycloalkyl, 6-40C aryl, and 2-40C heteroaryl.    SPECIFIC COMPOUNDS - 300 Compounds (I) are specifically claimed e.g. 4,5,14-triphenyl-6,14-diazapentacyclo(11.7.0.02,6.07,12.015,20)icosa-1(13),2,4,7,9,11,15(20),16,18-nonaene of formula (IA), 9-phenyl-9,17-diazahexacyclo(15.7.0.02,10.03,8.011,16.018,23)tetracosa-1(24),2(10),3(8),4,6,11,13,15,18(23),19,21-undecaene, 3,4,9,10-tetraphenyl-2,5,8,11-tetraazatetracyclo(10.4.0.02,6.07,11)hexadeca-1(16),3,5,7,9,12,14-heptaene, 2,9,17,24-tetraazahexacyclo(15.7.0.02,10.03,8.011,16.018,23)tetracosa-1(24),3(8),4,6,9,11,13,15,18(23),19,21-undecaene, and 4,5-diphenyl-3,6,13-triazapentacyclo(11.7.0.02,6.07,12.014,19)icosa-1(20),2,4,7(12),8,10,14(19),15,17-nonaene.