TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: The electroluminescent device is an organic display which further comprises a compound having the electroluminescent peak with wavelength of not greater than 560 nm, in the organic layer. The organic layer comprises an electroluminescent layer and a charge generating layer. In the device, where a mixed region of reductive dopant and organic substance, or mixed region of oxidative dopant and organic substance is placed on the inner surface of one or both electrode(s) among the pair of electrodes. The doping concentration of the electroluminescent dopant to the host in the electroluminescent region is 1-20 wt.%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Layer: The organic layer comprises an electroluminescent region containing at least one compound (I) and at least one electroluminescent dopant of formula M1L3L4L5 (II). The organic layer comprises at least one compound selected from arylamine compounds or styrylarylamine compounds. The organic layer comprises at least one metal selected from organic metals of Group 1, Group 2, 4th period and 5th period transition metals, lanthanide metals or d-transition elements.M1=Group 7-11 and 13-16 in the Periodic Table;L3-L5=ligands selected from 26 groups as given in the specification e.g. group of formulae (vi)-(ix);R61-R63=H, 1-60C alkyl (optionally substituted by halo), or 6-60C aryl (optionally substituted by 1-60C alkyl), or halo;R64-R67 and R76-R79=H, 1-60C alkyl, 1-30C alkoxy, 3-60C cycloalkyl, 2-30C alkenyl, 6-60C aryl, mono or di-1-30C alkylamino, mono or di-6-30C arylamino, SF5, tri-1-30C alkylsilyl, di-1-30C alkyl-6-30C arylsilyl, tri-6-30C arylsilyl, cyano or halo;R80 and R81=H, 1-60C alkyl (optionally substituted by halo), or 6-60C aryl (optionally substituted by 1-60C alkyl).The R76 optionally linked to an adjacent substituent via 2-12C alkylene or 2-12C alkenylene to form a fused ring or a multi-fused ring. The alkyl, cycloalkyl, alkenyl or aryl of R64-R67 and R76-R79, or the fused ring or multi-fused ring formed from R76 by linkage via alkylene or alkenylene optionally further substituted by at least one 1-60C alkyl, 6-60C aryl or halo. Preferred Definitions:    M=bivalent metal such as Be, Zn, Mg, Cu or Ni, or trivalent metal such as Al, Ga, In or B;    Q=selected from 21 groups as given in the specification e.g. -O-phenyl, -O-(4-CH3-phenyl), -O-(3-CH3-phenyl), -O-(2-CH3-phenyl), -O-(2,6-dimethyl-phenyl), -O-(3,5-dimethyl-phenyl) or -O-(biphenyl-3-yl).    SPECIFIC COMPOUNDS - 83 Compounds are specified as the compound (I) e.g. bis(2-oxazol-2-yl-phenoxy)zinc (I'); bis(2-(1-methyl-1H-imidazol-2-yl)-phenoxy)zinc; bis(2-thiazol-2-yl-phenoxy)zinc; bis(2-(1,3,4)thiadiazol-2-yl-phenoxy)zinc; and bis(2-(1,3,4)oxadiazol-2-yl-phenoxy)beryllium.