Color conversion film, method for manufacturing color conversion film, backlight unit, and liquid crystal display device
Provided are a color conversion film including, in the following order, a support, a first color conversion layer containing an organic light-emitting material which emits, by an excitation light having a wavelength of 400 nm or more and less than 500 nm, light observed in a region having a peak wavelength of 500 nm or more and less than 580 nm, an interlayer, and a second color conversion layer containing an organic light-emitting material which emits, by at least one of the excitation light having a wavelength of 400 nm or more and less than 500 nm or the light emitted from the organic light-emitting material, light observed in a region having a peak wavelength of 580 nm or more and less than 750 nm; a method for manufacturing a color conversion film, a backlight unit, and a liquid crystal display device.
1. A color conversion film comprising, in the following order:
a support;
a first color conversion layer containing an organic light-emitting material which emits, by an excitation light having a wavelength of 400 nm or more and less than 500 nm, light observed in a region having a peak wavelength of 500 nm or more and less than 580 nm;
an interlayer; and
a second color conversion layer containing an organic light-emitting material which emits, by at least one of the excitation light having a wavelength of 400 nm or more and less than 500 nm or the light emitted from the organic light-emitting material, light observed in a region having a peak wavelength of 580 nm or more and less than 750 nm, wherein;
the interlayer contains a polyvinylpyrrolidone resin and a polyvinyl alcohol resin, and a ratio of a content of the polyvinylpyrrolidone resin to a content of the polyvinyl alcohol resin in the interlayer is 1/99 to 75/25 on a mass basis; or
the interlayer contains a polyvinylpyrrolidone resin, a modified polyvinyl alcohol resin having a crosslinkable group, and an unmodified polyvinyl alcohol resin, and a ratio of a content of the modified polyvinyl alcohol resin having a crosslinkable group to a content of the unmodified polyvinyl alcohol resin in the interlayer is 1/99 to 30/70 on a mass basis.
2. The color conversion film according to claim 1 ,
wherein at least one of the organic light-emitting material contained in the first color conversion layer or the organic light-emitting material contained in the second color conversion layer is represented by General Formula (1),
in General Formula (1), X represents C—R 7 or N, and R 1 to R 9 are each independently selected from a hydrogen atom, 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 arylether group, an arylthioether group, an aryl group, a heteroaryl group, 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, or a phosphine oxide group, where adjacent groups of R 1 to R 9 may form a fused ring.
3. A color conversion film comprising, in the following order:
a support;
a first color conversion layer containing an organic light-emitting material which emits, by at least one of an excitation light having a wavelength of 400 nm or more and less than 500 nm or light emitted from an organic light-emitting material contained in a second color conversion layer, light observed in a region having a peak wavelength of 580 nm or more and less than 750 nm;
an interlayer; and
a second color conversion layer containing the organic light-emitting material which emits, by the excitation light having a wavelength of 400 nm or more and less than 500 nm, light observed in a region having a peak wavelength of 500 nm or more and less than 580 nm, wherein:
the interlayer contains a polyvinylpyrrolidone resin and a polyvinyl alcohol resin, and a ratio of a content of the polyvinylpyrrolidone resin to a content of the polyvinyl alcohol resin in the interlayer is 1/99 to 75/25 on a mass basis; or
the interlayer contains a polyvinylpyrrolidone resin, a modified polyvinyl alcohol resin having a crosslinkable group, and an unmodified polyvinyl alcohol resin, and a ratio of a content of the modified polyvinyl alcohol resin having a crosslinkable group to a content of the unmodified polyvinyl alcohol resin in the interlayer is 1/99 to 30/70 on a mass basis.
4. The color conversion film according to claim 1 ,
wherein the first color conversion layer and the interlayer are in direct contact with each other.
5. The color conversion film according to claim 1 ,
wherein the second color conversion layer and the interlayer are in direct contact with each other.
6. The color conversion film according to claim 1 ,
wherein a thickness of the interlayer is 0.1 μm to 20 μm.
7. The color conversion film according to claim 1 , further comprising:
a protective layer on a side of the second color conversion layer opposite to the first color conversion layer.
8. A backlight unit comprising:
a light source; and
the color conversion film according to claim 1 .
9. A liquid crystal display device comprising:
the backlight unit according to claim 8 ; and
a liquid crystal cell unit.
10. The color conversion film according to claim 1 ,
wherein the crosslinkable group is an ethylenically unsaturated polymerizable group.
11. The color conversion film according to claim 1 , wherein the interlayer further contains a polymerized substance of a polyvinyl alcohol resin and a crosslinking agent.
12. The color conversion film according to claim 3 ,
wherein at least one of the organic light-emitting material contained in the first color conversion layer or the organic light-emitting material contained in the second color conversion layer is represented by General Formula (1),
in General Formula (1), X represents C—R 7 or N, and R 1 to R 9 are each independently selected from a hydrogen atom, 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 arylether group, an arylthioether group, an aryl group, a heteroaryl group, 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, or a phosphine oxide group, where adjacent groups of R 1 to R 9 may form a fused ring.