Color conversion composition, color conversion film and backlight unit, display and lighting device each comprising same
A color conversion composition converting incident light to light having a longer wavelength than the incident light, and containing the following components (A)-(C): (A) at least one luminescent material; (B) a binder resin; and (C) at least one of tertiary amines, catechol derivatives and nickel compounds, in which the tertiary amines, the catechol derivatives and the nickel compounds have a molar extinction coefficient ε of 100 or less over the whole wavelength range from 400 nm to 800 nm is provided. This color conversion composition achieves a good balance between improvement of color reproducibility and durability if used for a liquid crystal display or an LED lighting device.
1. A color conversion composition for converting incident light into light having longer wavelength than the incident light,
wherein the color conversion composition comprises the following components (A) to (C):
(A) at least one luminescent material,
(B) a binder resin, and
(c) at least one of a tertiary amine, a catechol derivative and a nickel compound, and
wherein the tertiary amine, catechol derivative and nickel compound have a molar extinction coefficient ε of 100 or less in the whole wavelength region from 400 nm to 800 nm.
2. The color conversion composition according to claim 1 , wherein the component (C) contains a nickel compound and the nickel compound is at least one of a nickel salt of an organic acid, an acetylacetonate-based nickel complex, and a thiobisphenolate-based nickel complex.
3. The color conversion composition according to claim 1 , wherein the component (C) contains a nickel compound and a content of the nickel compound is from 1.0×10 −2 to 10 parts by weight per 100 parts by weight of the component (B).
4. The color conversion composition according to claim 1 , wherein the component (C) contains a tertiary amine and at least one substituent on a nitrogen atom of the tertiary amine is a substituted or unsubstituted alkyl group.
5. The color conversion composition according to claim 1 , wherein the content of the component (C) is from 10 −2 to 15 parts by weight per 100 parts by weight of the component (B).
6. The color conversion composition according to claim 1 , wherein the luminescent material contains a luminescent material which emits light having a peak wavelength of 500 to 580 nm by use of excitation light having a wavelength of 430 to 500 nm.
7. The color conversion composition according to claim 1 , wherein the luminescent material contains the following luminescent materials (a) and (b):
(a) a luminescent material that emits light having a peak wavelength of 500 to 580 nm by use of excitation light having a wavelength of 430 to 500 nm, and
(b) a luminescent material that emits light having a peak wavelength of 580 to 750 nm upon being excited by either one or both of excitation light having a wavelength of 430 to 500 nm and light emitted by the luminescent material (a).
8. The color conversion composition according to claim 7 , wherein a content w a of the luminescent material (a) and a content w b of the luminescent material (b) are in the relationship of w a ≥w b .
9. The color conversion composition according to claim 1 , wherein the luminescent material contains a compound represented by formula (1):
(wherein X is C—R 7 or N, and each of R 1 to R 9 , which may be the same as or different from one another, is selected from hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, a halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, a phosphine oxide group, and a fused ring and an aliphatic ring each formed between adjacent substituents).
10. The color conversion composition according to claim 9 , wherein in the formula (1), X is C—R 7 and R 7 is a substituted or unsubstituted aryl group.
11. The color conversion composition according to claim 9 , wherein in the formula (1), X is C—R 7 and R 7 is a substituted or unsubstituted phenyl group.
12. The color conversion composition according to claim 7 , wherein the luminescent material (a) is a compound represented by the formula (1):
(wherein X is C—R 7 or N, and each of R 1 to R 9 , which may be the same as or different from one another, is selected from hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, a halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, a phosphine oxide group, and a fused ring and an aliphatic ring each formed between adjacent substituents).
13. The color conversion composition according to claim 7 , wherein the luminescent material (b) is a compound represented by the formula (1):
(wherein X is C—R 7 or N, and each of R 1 to R 9 , which may be the same as or different from one another, is selected from hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, a halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, a phosphine oxide group, and a fused ring and an aliphatic ring each formed between adjacent substituents).
14. The color conversion composition according to claim 1 , wherein the binder resin is a thermosetting resin.
15. A color conversion film comprising a layer obtained by curing the color conversion composition according to claim 1 .
16. The color conversion film according to claim 15 , which is coated with a gas barrier layer.
17. A light source unit comprising a light source and the color conversion film according to claim 15 .
18. The light source unit according to claim 17 , wherein the light source is a light-emitting diode having a maximum light emission in the range of 430 to 500 nm.
19. A display comprising the light source unit according to claim 17 .
20. A lighting comprising the light source unit according to claim 17 .