TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The electron donor compound is in the form of a layer capable of transporting holes to an electrode, preferably anode. The layer of electron donor compound is obtained by evaporation or vacuum sublimation of the composition. In the device, the electron donor compound and electron acceptor compound forms a single layer in which the compounds form an interpenetrating network, capable of transporting electrons to a cathode and holes to an anode, where the layer is obtained by deposition of the composition by evaporation or vacuum sublimation or obtained by depositing by co-evaporation of two compositions comprising respectively the electron donating compound and the electron accepting compound.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Composition: The composition further comprises: a solvent, preferably chlorinated solvent comprising trichloromethane; and an electron acceptor compound comprising C60 or C70 fullerene or perylene diimide. Preferred Definitions:    A = electron withdrawing group comprising =C(CN)2, =C(CN)(COOR), 2,2-dimethyl-4,6-dioxo-(1,3)dioxan-5-ylidene, 1,3-diethyl-4,6-dioxo-2-thioxo-tetrahydro-pyrimidin-5-ylidene, 3-ethyl-4-oxo-2-thioxo-thiazolidin-(5Z)-ylidene or =(COOR)2; and    R = H or alkyl.    SPECIFIC COMPOUNDS - 2 Compounds (I) are specifically claimed i.e. 2-(5-(4-(naphthalen-2-yl-phenyl-amino)-phenyl)-thiophen-2-ylmethylene)-malononitrile of formula (Ia) and 2,2-dimethyl-5-(5-(4-(naphthalen-2-yl-phenyl-amino)-phenyl)-thiophen-2-ylmethylene)-(1,3)dioxane-4,6-dione.    EXAMPLE - 2.69 g 1,4-Dibromobenzene, 1 g N-phenylnaphthalen-2-amine and 1.75 g tert butoxide solution were dissolved in 40 ml toluene. The mixture was degassed for 10 minutes with argon. 100 mg (1,1'-bis(diphenylphosphino)ferrocene)dichloropalladium(II) was introduced into the mixture, then heated to 120 degrees C for 4 hours under argon atmosphere. Sodium tert-butylate was then filtered and the toluene was evaporated. The obtained product was purified to give N-(4-bromophenyl)-N-phenylnaphthalen-2-amine (Q1). 920 mg (Q1) and 1.18 ml tributylstannylthiophene were dissolved in 40 ml dry toluene. The obtained solution was degassed for 10 minutes. 143.3 mg (triphenylphosphine)palladium was then added to the mixture. The obtained mixture was refluxed for 24 hours. The toluene was evaporated and the product was purified to give N-phenyl-N-(4-(thiophen-2-yl)phenyl)naphthalene-2-amine (Q2). 200 mg (Q2) was introduced into Schlenk tube with argon, then dissolved in 10 ml dry tetrahydrofuran and cooled to -78 degrees C. 224 mu l n-Butyl lithium was added dropwise and the mixture was stirred for 30 minutes. White precipitate was formed. 71 mu l Dimethylformamide was then added and the mixture was again stirred overnight. The solvent was evaporated and the product was purified to give 5-(4-(naphthalene-2-yl(phenyl)amino)-phenyl)thiophene-2-carbaldehyde (Q3). 100 mg (Q3) was mixed with 35 mg malononitrile and the mixture was dissolved in 5 ml chloroform. One drop of triethylamine was added to the mixture and the mixture was refluxed for 2 hours. The product was purified to give 110 mg, 99% 2-(5-(4-(naphthalen-2-yl-phenyl-amino)-phenyl)-thiophen-2-ylmethylene)-malononitrile.