Abstract: The present invention relates to a new crystal form of the compound of formula and a process for its preparation. The compound may be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and is particularly well-suited for security applications.

Abstract: The present invention relates to a new crystal form of bis(diphenylimidazolidinetrithione-?S4, ?S5)-, (SP-4-1)-nickel(II), a printing ink formulation for security printing and security documents, comprising the new crystal form of bis(diphenylimidazolidinetrithione-?S4, ?S5)-, (SP-4-1)-nickel(II) as well as its use as IR absorber.

Abstract: The present invention relates to a new crystal form of bis(diphenylimidazolidinetrithione-?S4, ?S5)-, (SP-4-1)-nickel(II), a printing ink formulation for security printing and security documents, comprising the new crystal form of bis(diphenylimidazolidinetrithione-?S4, ?S5)-, (SP-4-1)-nickel(II) as well as its use as IR absorber.

Abstract: A method for producing a proton-conducting, polyazole-containing membrane, in which A) a composition containing polyphosphoric acid and at least one polyazole and exhibiting a solution viscosity in the range from 10 Pa·s to 1000 Pa·s, measured to DIN 53018 at the temperature at the orifice during production of the membrane, is pressed through an orifice at a temperature in the range from 25° C. to 300° C., and B) the composition is then solidified.

Abstract: A terrylene compound of formula I: wherein R1 to R4 are each independently an unsubstituted or substituted alkyl, aryl, thiophenyl or oligothiophenyl group, or a hydrogen atom. Two adjacent radicals selected from R1 to R4, together with the carbon atoms of the benzene ring to which they are bonded, may also form a fused ring system having 1 to 8 additional rings. With the carbon atoms to which it is bonded, A forms a fused monocyclic, dicyclic, tricyclic, tetracyclic, pentacyclic or hexacyclic ring system which optionally contains one or more independently selected substituents. A process for preparing the terrylene compound. An organic solar cell with a photoactive region including at least one organic donor material in contact with at least one organic acceptor material, the donor material and the acceptor material forming a donor-acceptor heterojunction, and the photoactive region including at least one such terrylene compound.

Abstract: The present invention relates to an organic solar cell with a photoactive region which comprises at least one organic donor material in contact with at least one organic acceptor material, wherein the donor material and the acceptor material form a donor-acceptor heterojunction and wherein the photoactive region comprises at least one substituted perylene.

Abstract: The present invention relates to an organic solar cell which comprises at least one photoactive region which comprises at least one indanthrene compound which is in contact with at least one fullerene compound, and to the use of indanthrene compounds in organic photovoltaics, especially in the form of a component cell of a tandem cell.

Abstract: The present invention relates to the use of dibenzotetraphenylperiflanthene as an electron donor material in an organic solar cell.

Abstract: A method for producing a proton-conducting, polyazole-containing membrane, in which A) a composition containing polyphosphoric acid and at least one polyazole and exhibiting a solution viscosity in the range from 10 Pa·s to 1000 Pa·s, measured to DIN 53018 at the temperature at the orifice during production of the membrane, is pressed through an orifice at a temperature in the range from 25° C. to 300° C., and B) the composition is then solidified.