TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: (I) has a surface tension of 25-45 mN/m at 10 degrees C above the melting point of the solvent having the highest boiling point, and a viscosity of 0.25-100 mPas at 10 degrees C above the melting point of the solvent having the highest boiling point. (I) comprises at least an inert binder, a host material, and at least one wetting agent.Preferred Components: The organic solvent comprises an aromatic and/or heteroaromatic compound, preferably a naphthalene compound, a benzene compound, a pyridine compound, a pyrazine compound and/or a pyrazole compound having a molecular weight of at least 120 g/mole. The solvent is a mixture of at least a benzene compound, a naphthalene compound, a sulfolane compound, a sulfone compound or an alcohol compound. The organic semiconducting compound is an organic light emitting material and/or charge transporting material. The organic semiconducting compound comprises thiophene compound of formula (P1), 2-(2,2')bithiophenyl-5-yl-thieno(3,2-b)thiophene compound of formula (P2), 2-(2,2')bithiophenyl-5-yl-thieno(3,2-b)thiophene compound of formula (P3), 2-(2,2')bithiophenyl-5-yl-thieno(2,3-b)thiophene compound of formula (P4), 2-(2,2')bithiophenyl-5-yl-thieno(2,3-b)thiophene compound of formula (P5), 2-phenanthren-2-yl-6,12-dihydro-indeno(1,2-b)fluorene compound of formula (P6), (4-(6,12-dihydro-indeno(1,2-b)fluoren-2-yl)-phenyl)-diphenyl-amine compound of formula (P7) or pentacene compound of formula (M1). The organic semiconducting compound is an organic phosphoresecent compound which emits light and in addition contains at least an atom having an atomic number of greater than 38. The phosphorescent compounds have a structure of formulae (a)-(d).R = H, F, Cl, Br, I, CN, 1-40C alkyl (in which one or more C atoms are optionally replaced by O, S, O-CO, CO-O, O-CO-O, CR20=CR20 or CC such that O- and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN), or 4-20C aryl or 4-20C heteroaryl (both optionally substituted by one or more non-aromatic groups R21); orone or more R = a mono- or polycyclic aliphatic or aromatic ring system with one another and/or with the ring to which they are attached;n = greater than 1 (preferably 10-1000);R21 = F, Cl, Br, I, CN, Sn(R22)3, Si(R22)3 or B(R22)2, 1-25C alkyl (in which one or more C atoms are optionally replaced by O, S, O-CO, CO-O, O-CO-O, CR20=CR20, CC such that O- and/or S-atoms are not linked directly to each other, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN), 4-20C aryl or 4-20C heteroaryl (both optionally substituted by one or more non-aromatic groups R21); orone or more R21 = ring system with one another and/or with R;R20 = H, F, Cl, CN, 1-12C alkyl, 4-10C aryl or 4-10C heteroaryl;R22 = H or an aliphatic or aromatic 1-20C hydrocarbon; orR22R22 = a ring together with a hetero atom (Sn, Si or B) to which they are attached;r = 0-4; ands = 0-5;R1-R4, R7-R10, R15-R17 = 1-40C carbyl, 1-40C hydrocarbyl, 1-40C alkoxy, 6-40C aryloxy, 7-40C alkylaryloxy, 2-40C alkoxycarbonyl, 7-40C aryloxycarbonyl (all optionally substituted), H, CN or C(=O)NH2, C(=O)-X, C(=O)-H, isocyano or isocyanate group, thiocyanate or thioisocyanate group, optionally substituted amino, OH, nitro, CF3, halo or an optionally substituted silyl; orR1R2, R2R3, R3R4, R7R8, R8R9, R9R10, R15R16, R16R17 (all optionally cross-bridged with each other) = 4-40C optionally saturated ring, which is optionally intervened by O, S or -N(R18)-, where one or more of the carbon atoms of the polyacene skeleton is optionally substituted by a heteroatom of N, P, As, O, S, Se or Te;R18 = H or hydrocarbyl (optionally substituted);X = halo;A = Si or Ge;R31 = cyclic group containing at least a donor atom, preferably nitrogen, carbon in the form of a carbene or phosphorus, via which the cyclic group is bonded to the metal, and which may in turn carry one or more substituents R30;R32 = cyclic group which contains a carbon atom via which the cyclic group is bonded to the metal and which may in turn carry one or more substituents R30, where R31 and R32 are connected to one another via a covalent bond;B1 = monoanionic, bidentate chelating ligand, preferably a diketonate ligand; eitherR30 = F, Cl, Br, I, NO2, CN, 1-20C alkyl, 1-20C alkoxy (in which one or more nonadjacent CH2 groups are optionally replaced by -O-, -S-, -NR30a-, -CONR30a-, -CO-O-, -C=O-, -CH=CH- or -CC-, and in which one or more hydrogen atoms are optionally replaced by F, 4-14C aryl or 4-14C heteroaryl and optionally substituted by one or more non-aromatic R30 radicals); ormore R30 either on the same ring or on the two different rings = a mono- or polycyclic, aliphatic or aromatic ring system; andR30a = 1-20C alkyl, 1-20C alkoxy (in which one or more nonadjacent CH2 groups are optionally replaced by -O-, -S-, -CO-O-, -C=O-, -CH=CH- or -CC-, and in which one or more hydrogen atoms are optionally replaced by F or 4-14C aryl or 4-14C heteroaryl group and optionally substituted by one or more non-aromatic R30 radicals). EXAMPLE - No suitable example given.