TECHNOLOGY FOCUS - ELECTRONICS - Preferred Layer: The organic layer is hole injection layer, hole transport layer, electron transport layer or electron injection layer. Full Definitions:    R1-R14=H, deuterium, tritium, 6-60C aryl optionally substituted by halo, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthiophene, 6-60C arylthiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl (optionally substituted by group V1), 4-60C heterocyclyl (optionally substituted by halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthio, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl optionally substituted by deuterium, silane, boron, germanium or 5-60C heterocyclyl (all optionally substituted) and having O, N or S), condensed ring of 6-60C aromatic ring and 4-60C aliphatic ring, amine optionally substituted by 1-60C alkyl, 2-60C alkenyl, 6-60C aryl, 8-60C arylalkenyl), nitro, nitrile, amide, or silane;    group V1=deuterium, 8-60C arylalkenyl, silane, boron, germanium, 5-60C heterocyclyl (all optionally substituted);    m=1-2;    A=O, S, or N(Ar1);    B'=6-60C arylene (optionally substituted by halo, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthiophene, 6-60C arylthiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl (optionally substituted by group V1), N(Ar2)p), 4-60C heterocyclyl (all optionally substituted halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthio, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl optionally substituted by deuterium, silane, boron, germanium or 5-60C heterocyclyl (all optionally substituted) and containing O, N or S), condensed ring of 6-60C aromatic ring and 4-60C aliphatic ring, or silane;    p=0 (when m is 2) or 1;    Ar1,Ar2=6-60C aryl (optionally substituted by halo, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthiophene, 6-60C arylthiophene, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl optionally substituted by group V1, 4-60C heterocyclyl (optionally substituted by halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamine, 6-60C arylamine, 1-60C alkylthio, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl, or optionally substituted 5-60C heterocyclyl containing O, N or S);and    L=single bond, 6-60C arylene (optionally substituted by halo, 1-60C alkyl, 2-60C alkenyl, 1-60C alkoxy, 6-60C aryl, 8-60C arylalkenyl, optionally substituted silane, 5-60C heterocyclyl having O, N or S), 4-60C heteroarylene (optionally substituted by halo, 1-60C alkyl, 2-60C alkenyl, 1-60C alkoxy, 6-60C aryl, 8-60C arylalkenyl, optionally substituted silane, optionally substituted 5-60C heterocyclyl containing O, N or S).    SPECIFIC COMPOUNDS - 131 Compounds (I) are specifically claimed, e.g. 2-(4-(4-(naphthalen-1-yloxy)phenyl)phenyl)naphthalene of formula (A), 1-(4-(naphthalen-1-ylsulfanyl)phenyl)-4-(naphthalen-2-yl)naphthalene, 2-(4-(naphthalen-1-yloxy)phenyl)-6-(naphthalen-2-yl)naphthalene, naphthalen-1-yl-(4-(5-naphthalen-2-yl-thiophen-2-yl)-phenyl)-phenyl-amine and biphenyl-4-yl-(3',5'-di-naphthalen-2-yl-biphenyl-4-yl)-(4-methyl-naphthalen-1-yl)-amine.