TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The organic layer is a light-emitting layer or a electron-transport layer. (I) function as host material, dopant material or electron-transport material.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Definitions:    R1-R14 = H, silyl, phenyl, tolyl, biphenylyl, terphenylyl, pentalenyl, indenyl, naphthyl, biphenylenyl, anthracenyl, benzoanthracenyl, azlenyl, heptalenyl, acenaphthylenyl, phenalenyl, methylanthryl, phenanthrenyl, triphenylenyl, pyrenyl, chrysenyl, picenyl, perylenyl, chloroperylenyl, pentaphenylyl, pentacenyl, tetraphenylenyl, hexaphenylyl, hexacenyl, rubicenyl, coronenyl, trinaphthylenyl, heptaphenylyl, heptacenyl, fluorenyl, pyranthrenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, thiophenyl, indolyl, purinyl, benzimidazolyl, quinolinyl, benzothiophenyl, parathiazinyl, pyrrolyl, pyrazolyl, imidazolyl, imidazolinyl, oxazolyl, thiazolyl, triazolyl, tetrazolyl, oxadiazolyl, pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, thianthrenyl, cyclopentyl, cyclohexyl, oxiranyl, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, piperidinyl, piperazynyl or morpholinyl.    Provided that: at least one of R1-R14 is phenyl, naphthyl or optionally substituted aryl.    SPECIFIC COMPOUNDS - 150 Compounds (I) are specifically claimed, e.g. 16,16,24,24-tetramethyl-4-(naphthalen-2-yl)-11-phenylhexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene (Ia), 16,16,24,24-tetramethylhexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene, 16,16,24,24-tetramethyl-4,11-diphenylhexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene, 16,16,24,24-tetramethyl-4,11-bis(naphthalen-2-yl)hexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene and 16,16,24,24-tetramethyl-4,11-bis(naphthalen-1-yl)hexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene.    EXAMPLE - 5 g 4-Bromo-16,16,24,24-tetramethyl-11-phenylhexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene, 2 g 2-naphthaleneboronic acid, 224 mg tetrakis(triphenylphosphine)palladium(0), 2 g potassium carbonate, 10 ml distilled water and 100 ml toluene were mixed and reacted under reflux condition for 24 hours. Then the reaction solution was extracted with dichloromethane, dried over anhydrous magnesium sulfate and filtered. Then filtrate was vacuum concentrated, and purified to obtain 3.5 g yellow green solid of 16,16,24,24-tetramethyl-4-(naphthalen-2-yl)-11-phenylhexacyclo(12.10.0.0(3,12).0(5,10).0(15,23).0(17,22))tetracosa-1(14),2,4,6,8,10,12,15(23),17,19,21-undecaene (Ia).