TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The photovoltaic device comprises the photovoltaic layer, the first electrode formed on at least a part of the front surface of the photovoltaic layer, and the second electrode formed on at least a part of the rear surface of the photovoltaic layer. The second electrode is a reflective electrode for the electromagnetic radiation incident upon the device. The one of the electrode is made of material with work function providing a hole-harvesting contact and a barrier contact for electrons, and the another electrode is made of material with work function providing a barrier contact for holes and an electron-harvesting contact. The electrode material is aluminum, indium tin oxide, carbon nanotube conductive coatings, poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) layers, phthalocyanines, lithium fluoride or aluminum-doped zinc oxide. The one of the electrode comprises an electron-acceptor layer contacting with the photovoltaic layer and another electrode comprises an electron-donor layer contacting with the photovoltaic layer. The photovoltaic device further comprises a substrate (5) bearing the electrodes and the photovoltaic layer. The substrate is made of material comprising polymer or glass. The substrate is transparent for the incident electromagnetic radiation to which the device is sensitive. The photovoltaic device comprises at least two photovoltaic layers, where the photovoltaic layers comprise different (I), and ensuing absorption of electromagnetic radiation in the same or different spectral subranges within a wavelength of 400-3000 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises: heating mixture of substituted 4-(5,15-dialkylyl-5,15-dihydrocarbazolo(3',2':5,6)(1,4)oxazino(2,3-b)indolo(2,3-i)phenoxazin-8-yl)aniline compounds of formula (a) and 3,4,9,10-perylenetetracarboxylic dianhydride in 3-chlorophenol to give substituted polycyclic compounds of formula (VII) (representative of (I)).R3 = linear or branched (1-35C)alkyl, (2-35C) alkenyl, (2-35C)alkynyl, alkyl and/or aryl (both optionally substituted); andX = Cl or Br (preferred).Preferred Components: The molecular system Cor1-B1-Cor2-B1-Cor1 possesses a symmetry of the D2h space group. The energy levels of donors correlate with energy levels of acceptor according to the equation HOMO(A) less than HOMO (D) less than or equal to LUMO(A)-1 eV and LUMO(A) less than LUMO(D). The perylene diimide serves as the acceptor core Cor2, the bridging group B1 is phenyl or biphenyl and the energy levels HOMO(D) and LUMO(D) of donor cores Cor1 satisfies conditions -6 eV less than HOMO(D) less than -5.5 eV and -4 eV less than LUMO(D). (I) is substituted polycyclic compounds of formula (II)-(VI) or (VII). The solvent is water, water-miscible solvent, ketones, carboxylic acids, hydrocarbons, cyclohydrocarbons, chlorohydrocarbons, alcohols, ethers and/or esters.R4 = R3. Preferred Definitions:    R1, R2 = alkyl or aryl (both optionally substituted), linear or branched 1-35C alkyl, 2-35C alkenyl and/or 2-35C alkynyl for organic solvent or COOH, SO3H or H2PO3 for water or water-miscible solvent, where these groups are connected with the cores Cor1 and Cor2 directly or via a spacer comprising aryl, -C(O)-, -C(O)O-, -C(O)-NH-, -(SO2)NH-, -O-, -CH2O-, -NH- and/or =N-;    B1 = p-phenylene (Php1) oligomer, 2,7-oligofluorene (Fls) or alkylene (-CH2)-j-;    p1 = 1-5;    s, j = 1-4;    X1, X2 = H, Cl, Br, F, OH, NO2, NO or NH2;    Cor2 = 2,9-diyl-anthra(2,1,9-def;6,5,10-d'e'f')diisoquinoline-1,3,8,10-tetraone, 7,22-diyl-7,22-diazadecacyclo(14.14.2.2.2.0.0.0.0.0.0)hexatriaconta-1(30),2(36),3,5(35),9,11,13,15,17(34),18,20(33),24,26,28,31-pentadecaene-6,8,21,23-tetrone, 11,30-diyl-11,30-diazatridecacyclo(22.14.2.2.2.2.0.0.0.0.0.0.0.0.)hexatetraconta-1(38),2(46),3,5(45),6(44),7,9(43),13,15,17,19,21,23,25(42),26,28(41),32,34,36,39-icosaene-10,12,29,31-tetrone, 5,10-diyl-5,10-dihydro-phenazine or 5,5'-diyl-5H,5'H-(2,2')bi((1,3)dithiolo(4,5-c)pyrrolidene), where Cor2 possesses a symmetry of the D2h space group; and    Cor1 = 15 polycyclic moieties e.g. 9-yl-9H-tetrabenzo(a,c,g,i)carbazole, 2-yl-8,9-dihydro-1H-indolo(2,3-a)pyrrolo(3,4-c)carbazole-1,3(2H)-dione, 7-yl-7,18-dihydro-14H-5,9,16-trithia-7,14,18-triaza-heptacene, 14-yl-14H-dibenzo(a,j)phenothiazine, 13-yl-13H-6-thia-13-aza-pentacene, pentacen-6-yl and 9H-carbazol-9-yl, where the Cor-1 possesses a symmetry of the C2v or D2h space group.    EXAMPLE - A mixture of 9-(4-bromophenyl)carbazol (4.9 g), trimethylsilylacteylene (2.17 ml), triphenylphosphine (0.19 g) and palladium bis(triphenylphosphine) chloride (0.12 g) in triethylamine (60 ml) was degassed for 15 minutes. Reaction mixture was boiled for 5 minutes, then copper iodide (0.12 g) was added. The resulted mixture was boiled for another 12 hours and worked up to give 9-(4-trimethylsilanylethynyl-phenyl)-9H-carbazole (Q1). A mixture of (Q1) (2 g) and tetrabutylammonium fluoride in anhydrous tetrahydrofuran (50 ml) was stirred for 12 hours, where the quantity of tetrabutylammonium fluoride was selected as three moles of tetrabutylammonium fluoride to one mole of (Q1). The resulting mixture was treated with 1N hydrochloric acid (50 ml) and extracted with ether (2x 50 ml). Organic layer was separated and worked up to give 9-(4-ethynylphenyl)carbazole (Q2). N,N-Bis(3,4-di(hexadecyloxy)benzyl)-1,7-dibromoperylene diimide (1.8 g), palladium bis(triphenylphosphine) chloride (0.23 g), triphenylphospine (0.1 g) and copper iodide (0.06 g) were dissolved in a mixture of triethylamine (40 ml) and tetrahydrofuran (60 ml). The resulting solution was degassed several times and then heated at 60 degrees C for 20 minutes. (Q2) (0.8 g) was added to the solution in one portion under argon atmosphere. Reaction mixture was heated for 2 hours and then left at room temperature until completely cooled down. The formed precipitate was filtered out, dried until the constant weight, reprecipitated from chloroform-methanol system and then recrystallized from chloroform to give N,N-bis(3,4-di(hexadecyloxy)benzyl),7-bis(4-(carbazole-9-yl)phenyl-4-ethynyl)perylene diimide.