TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The dopant is present in an amount so that when the material is deposited to form a layer, the dopant contributes 10-40%, preferably 33% to layer thickness. The dopant comprises tetracyanoquinodimethane or tetrafluorotetracyano-quinodimethane. The hole transport material comprises a compound comprising any of substituted 4,4'-di(9H-carbazol-9-yl)biphenyl compounds of formula (J1), N(4),N(4')-di-naphthalen-1-yl-N(4), substituted N(4')-diphenyl-biphenyl-4,4'-diamine compounds of formula (J2), substituted N1,N1-bis(4-(diphenylamino)phenyl)-N4,N4-diphenylbenzene-1,4-diamine compounds of formula (J3), substituted N(4),N(4')-di-naphthalen-1-yl-N(4),N(4')-di-meta-tolyl-biphenyl-4,4'-diamine compounds of formula (J4), substituted N(4),N(4')-di-naphthalen-1-yl-N(4),N(4')-di-para-tolyl-biphenyl-4,4'-diamine compounds of formula (J5), substituted 9,9'-spirobi(fluorene) compounds of formula (J6) or substituted 9H-fluorene compounds of formula (J7).R2, R11-R14 = aliphatic groups, aromatic, heterocyclic or polycyclic ring moieties (all optionally substituted), H, halo or thiophenyl, where, in compound (J1), the methyl groups may be replaced by 1-4C alkyl or monocyclic or polycyclic aryl or heteroaryl which may be further substituted e.g. with alkyl, aryl or arylamino.The hole transport material comprises a tert-amine which is alpha -bis(N-(1-naphthyl)-N-phenyl)benzidine or beta -3-n-butylphthalide. The layer is a hole transport layer or a hole injection layer. The optical LED device has: an emissive layer comprising either a fluorescent emitter, a phosphorescent emitter, ion fluorescent (rare earth based) emitters, quantum dots, or thermally activated fluorescent materials; and a hole injection layer comprising phthalocyanine, 4,4',4''-tris(2-naphthyl(phenyl)amino)triphenylamine, zinc tetraphenylporphyrin, or 1,4,5,8,9,12-hexaaza-triphenylene-2,3,6,7,10,11-hexacarbonitrile. In the electro-optic or optoelectronic device, the compound (Q1) is: one of 2-naphthalen-1-yl-thianthrene, 1-phenanthren-9-yl-thianthrene, 1-(10-phenyl-anthracen-9-yl)-thianthrene, 9,10-di(thianthren-1-yl)anthracene, (VIII), 2-((E)-2-anthracen-9-yl-vinyl)-6-thianthren-1-yl-quinoline, 1-phenyl-2-( 4-(thianthren-9-yl)phenyl)-1H-benzo( d)imidazole, 2-phenyl-5-(4-thianthren-1-yl-phenyl)-(1,3,4)oxadiazole, 2-phenyl-1-(4-thianthren-1-yl-phenyl)-ethanone, 6-methyl-2-(4-thianthren-1-yl-phenyl)-imidazo(1,2-a)pyridine, and 2-(4-thianthren-1-yl-phenyl)-quinoxaline; 1-anthracenyl-9-yl-thianthrene, 1-biphenyl-4-yl-thianthrene and/or 9,10-bis(1-thianthrenyl)anthrane; mixed with a low work function metal complex or is doped with a fluorescent dopant or is doped with a phosphorescent dopant or is doped with a rare earth chelate; mixed with either lithium quinolinolate or lithium Schiff base complexes from 1-99 mass%, preferably 30-80 mass%; a component of an emissive layer e.g. a host; and comprised in an electron transport layer and/or in an electron injection layer. In the electro-optic or optoelectronic device and optical light emitting diode device: the emissive layer is either composed of a fluorescent emitter, a phosphorescent emitter, or ion fluorescent (rare earth based emitters); a hole injection layer comprising phthalocyanine, 4,4',4''-tris(2-naphthyl(phenyl)amino)triphenylamine, zinc tetraphenylporphyrin or 1,4,5,8,9,12-hexaaza-triphenylene-2,3,6,7,10,11-hexacarbonitrile; the hole transporting layer is doped or mixed with an electron acceptor e.g. tetracyanoquinodimethane or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane; the hole transporter is mixed with another hole transporter; the electron transporter is mixed with a lithium, potassium, cesium compounds or any other compounds of low work function metals or materials; the electron transporter is mixed with a rare earth metal or its complexes; the electron transporter is mixed with lithium quinolinoates or lithium Schiff bases; the electron transporter is mixed with another electron transporter or electron injector; the electroluminescent layer comprises a metal complex; the electroluminescent layer comprises zirconium or hafnium quinolate as host material doped with a dopant; the electroluminescent layer comprises aluminum quinolate as the host material doped with a dopant; the electroluminescent layer comprises an aromatic tertiary amine as host material doped with a dopant; the electroluminescent layer comprises a light emitting material which is a metal or metalloid complex; the electroluminescent layer comprises as luminescent material a metal quinolate, an iridium, ruthenium, osmium, rhodium, iridium, palladium or platinum complex, a boron complex or a rare earth complex; the electroluminescent layer comprises as electroluminescent material lithium quinolate or aluminum quinolate; the electroluminescent layer comprises a light-emitting conjugated polymer or copolymer or a dendrimer; or a hole transport layer comprises alpha -bis(N-(1-naphthyl)-N-phenyl)benzidine.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Components: (I) are substituted thianthrene compounds of formulae (II)-(VIII).Z1 = N, P(=O) or Si;R1 = H or at least one of methyl, methoxy, ethyl, ethoxy, phenyl or F;u = 1-3 (when Z1 is N or P(=O)) or 1-4 (when Z1 is Si), preferably 2;v = 1 or 2;p = 0-2;q, r = 0 or 1;s = 1 (when Z1 is N or P(=O)) or 2 (when Z1 is Si), where the dotted linkage (when present) indicates that the two phenyl rings form part of a 9H-carbazol-9-yl, the solid line indicates a linkage between the tricyclic ring directly, by phenyl or by biphenyl, and the linkages to the tricyclic ring may be at its 1- or 2- position or may be at its 2, 7 or 2,8-positions;z = 1-3, preferably 2, where the dotted lines correspondingly represent bonds for each phenothiazine moiety to one of the phenyl or naphthyl rings;w, x and y = 0 or 1, where the linkages may be at the 1- or 2- position of the tricyclic ring or rings or may be at the 2,7- or 2,8- positions and are para- to the phenyl or naphthyl rings to which they are attached; anda = polyphenyl chain or fused rings.(I) have 1-3 thianthrene moieties linked to conjugated or aromatic hydrocarbon other than alkyl-substituted fluorene. (I) contain an aminobiphenyl, diaminobiphenyl, 2,7-diaminofluorene, 2,7-diaminospirobifluorene or 2,7,2',7'-tetraaminospirobifluorene residue. Preferred Definitions:    Ar2 = carbazole, spiro-bicarbazole or dibenzothiazole residues (all optionally ring substituted with 1-4C alkyl-, 1-4C alkoxy or F); and    m = 2.    SPECIFIC COMPOUNDS - 64 Compounds (I) are disclosed e.g. 4,4',4''-tri-(thianthren-1-yl)triphenylamine of formula (Ia), 4,4'-di-(thianthren-1-yl)triphenylamine, 4-(thianthren-2-yl)triphenylamine, 4,4'-di-(thianthren-2-yl)triphenylamine, and 4,4',4''-tri-(thianthren-2-yl)triphenylamine.    EXAMPLE - To a mixture of 2 g tris(4-bromotriphenylamine), 3.6 g 1-thianthrenylboronic acid, 0.72 g tetrakis(triphenyl phosphine) palladium in 70 ml ethyleneglycoldimethyl ether, 3 g potassium carbonate in 50 ml water was added. The reaction mixture was magnetically stirred and refluxed under nitrogen atmosphere for 20 hours, allowed to cool and the solvent removed under reduced pressure. The residue was dissolved in dichloromethane and extracted with brine. The organic phase was washed with water, dried over anhydrous magnesium sulfate and solvent removed to give a green solid. To the solid, methanol was added, stirred for 6 hours and filtered off under suction. The product was washed with diethyl ether and dried under vacuum at 70 degrees C to obtain 3.15 g 4,4',4''-tri-(thianthren-1-yl)triphenylamine.