Illumination devices

1. An illumination device, comprising at least one LED and at least one colour converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate, wherein the LED and the colour converter are present in a remote phosphor arrangement and wherein air, a noble gas, nitrogen, an other gas, or a mixture thereof are present between the colour converter and the LED.

2. The illumination device of claim 1 , wherein the at least one organic fluorescent colorant is an organic fluorescent dye.

3. The illumination device of claim 1 , Illumination wherein the at least one organic fluorescent colorant is a green-or red-or orange-fluorescing organic fluorescent dye.

4. The illumination device of claim 1 , wherein the at least one organic fluorescent colorant is a naphthalene or perylene derivative.

5. The illumination device of claim 1 , wherein the at least one organic fluorescent colorant is selected from the group consisting of

wherein:

R 1 is a linear or branched C 1 -C 18 alkyl radical, a C 4 -C 8 cycloalkyl radical which may be mono-or polysubstituted by halogen or by linear or branched C 1 -C 18 alkyl, or phenyl or naphthyl, where phenyl and naphthyl may be mono-or polysubstituted by halogen or by linear or branched C 1 -C 18 alkyl;

X represents substituents in the ortho and/or para position and is linear or branched C 1 to C 18 alkyl; and

y is a number from 0 to 3.

6. The illumination device of claim 5 , wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropyl-phenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, 3,9-dicyanoperylene-4,10-bis(sec-butyl carboxylate), 3,10-dicyanoperylene-4,9-bis(sec-butyl carboxylate), 3,9-dicyanoperylene-4,10bis(isobutyl carboxylate), 3,10-dicyanoperylene-4,9-bis(isobutyl carboxylate), N-(2,6-di(isopropyl)phenyl)perylene-3,4-dicarboxylic monoimide, and a mixture thereof.

7. The illumination device according to claim 6 , wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide and a mixture thereof.

8. A color converter, comprising at least one organic fluorescent dye in a matrix consisting essentially of polystyrene or polycarbonate, wherein the at least one organic fluorescent dye is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide,3,9-dicyanoperylene-4,10-bis(sec-butyl carboxylate),3,10-dicyanoperylene-4,9-bis(sec-butyl carboxylate), 3,9-dicyanoperylene-4,10-bis(isobutyl carboxylate), 3,10-dicyanoperylene-4,9-bis(isobutyl carboxylate), N-(2,6-di(isopropyl)phenyl)perylene-3,4-dicarboxylic monoimide, and a mixture thereof.

9. The color converter according to claim 8 , wherein the at least one organic fluorescent dye is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropyl-phenoxy)perylene-3,4:9,10-tetracarboxdiimide, and a mixture thereof.

10. The color converter according to claim 8 , wherein the at least one organic fluorescent colorant is dissolved in the matrix.

11. The color converter of claim 8 , further comprising at least one inorganic white pigment as a scattering body.

12. The color converter of claim 8 , which is a film, a plaque or a sheet.

13. A process for producing the color converter of claim 8 , the process comprising dissolving the at least one organic fluorescent colorant in an organic solvent together with the matrix material and optionally scattering particles, and processing a resulting mixture into a film by removing the solvent.

14. The process of claim 13 , further comprising extruding and/or injection-molding the matrix with the at least one organic fluorescent colorant.

15. A process, comprising converting light produced by LEDs with at least one color converter according to claim 8 .

16. A remote phosphor structure, comprising the color converter of claim 8 and at least one LED.

17. An illumination device, comprising at least one LED and at least one colour converter comprising at least one organic fluorescent colorant in a matrix consisting essentially of polystyrene or polycarbonate, wherein the LED and the colour converter are present in a remote phosphor arrangement and wherein the at least one organic fluorescent colorant is selected from the group consisting of N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, 3,9-dicyanoperylene-4,10-bis(sec-butyl carboxylate), 3,10-dicyanoperylene-4,9-bis(sec-butyl carboxylate), 3,9-dicyanoperylene-4,10-bis(isobutyl carboxylate), 3,10-dicyanoperylene-4,9-bis(isobutyl carboxylate), N-(2,6-di(isopropyl)phenyl)perylene-3,4-dicarboxylic monoimide, and a mixture thereof.

18. The illumination device according to claim 8 , wherein the at least one organic fluorescent colorant is selected from N,N′-bis(2,6-diisopropylphenyl)-1,7-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, N,N′-bis(2,6-diisopropylphenyl)-1,6-di(2,6-diisopropylphenoxy)perylene-3,4:9,10-tetracarboxdiimide, and a mixture thereof.

19. The illumination device according to claim 8 , wherein air, a noble gas, nitrogen, another gas, or a mixture thereof are present between the colour converter and the LED.