Photosensitive resin composition, black pixel defining layer using the same and display device
A photosensitive resin composition, a black pixel defining layer, and a display device, the composition including a binder resin; a black colorant; a photopolymerizable monomer; a photopolymerization initiator; and a solvent, wherein the solvent includes a first acetate solvent and a second acetate solvent and a boiling point difference between the first acetate solvent and the second acetate solvent is about 10° C. to about 60° C.
1. A photosensitive resin composition, comprising
a binder resin, the binder resin including a polyamic acid-polyimide copolymer that includes a polyamic acid repeating unit and a polyimide repeating unit in a mole ratio of the polyamic acid repeating unit to the polyimide repeating unit of about 5:5 to about 9:1;
a black colorant;
a photopolymerizable monomer;
a photopolymerization initiator; and
a solvent,
wherein:
the solvent includes a first acetate solvent and a second acetate solvent,
a boiling point difference between the first acetate solvent and the second acetate solvent is about 10° C. to about 60° C., and
the polyamic acid-polyimide copolymer has a weight average molecular weight of about 3,000 g/mol to less than 20,000 g/mol.
2. The photosensitive resin composition as claimed in claim 1 , wherein the first acetate solvent and the second acetate solvent are included in a weight ratio of about 2:8 to about 8:2.
3. The photosensitive resin composition as claimed in claim 1 , wherein the solvent further includes propylene glycol monomethylether, ethyl lactate, or gamma butyrolactone.
4. The photosensitive resin composition as claimed in claim 3 , wherein the propylene glycol monomethylether, ethyl lactate, or gamma butyrolactone is included in an amount of about 5 parts by weight to about 10 parts by weight, based on 100 parts by weight of the solvent.
5. The photosensitive resin composition as claimed in claim 1 , wherein the binder resin further includes a polyamic acid ester polymer, a polyhydroxyamide polymer, a polybenzoxazole polymer, or a copolymer thereof.
6. The photosensitive resin composition as claimed in claim 1 , wherein the black colorant includes an organic black pigment.
7. The photosensitive resin composition as claimed in claim 1 , wherein the photopolymerizable monomer includes a compound including at least two functional groups represented by Chemical Formula 1:
wherein, in Chemical Formula 1,
R 1 is a hydrogen atom or a substituted or unsubstituted C1 to C10 alkyl group, and
L 1 is a single bond or a substituted or unsubstituted C1 to C10 alkylene group.
8. The photosensitive resin composition as claimed in claim 7 , wherein the compound including at least two functional groups represented by Chemical Formula 1 is a compound represented by Chemical Formula 2 or Chemical Formula 3:
wherein, in Chemical Formula 2 and Chemical Formula 3, p, q, r, and s are each independently an integer of 1 to 10.
9. The photosensitive resin composition as claimed in claim 1 , wherein the photosensitive resin composition includes:
about 1 wt % to about 20 wt % of the binder resin;
about 1 wt % to about 20 wt % of the black colorant;
about 1 wt % to about 5 wt % of the photopolymerizable monomer;
about 0.1 wt % to about 5 wt % of the photopolymerization initiator; and
the solvent, all wt % being based on a total weight of the photosensitive resin composition.
10. The photosensitive resin composition as claimed in claim 1 , wherein the photosensitive resin composition further includes malonic acid, 3-amino-1,2-propanediol, a silane coupling agent, a leveling agent, a surfactant, a radical polymerization initiator, or a combination thereof.
11. A black pixel defining layer manufactured using the photosensitive resin composition as claimed in claim 1 .
12. A display device including the black pixel defining layer as claimed in claim 11 .
13. The display device as claimed in claim 12 , wherein the display device is an organic light emitting diode (OLED).
14. The photosensitive resin composition as claimed in claim 1 , wherein the mole ratio of the polyamic acid repeating unit to the polyimide repeating unit is 6:4 to 9:1.
15. The photosensitive resin composition as claimed in claim 1 , wherein the mole ratio of the polyamic acid repeating unit to the polyimide repeating unit is greater than 6:4 to about 9:1.
16. The photosensitive resin composition as claimed in claim 1 , wherein the polyamic acid-polyimide copolymer has a weight average molecular weight of about 3,000 g/mol to about 10,000 g/mol.
17. A photosensitive resin composition, comprising:
a binder resin, the binder resin including a polyamic acid-polyimide copolymer that has a weight average molecular weight of about 3,000 g/mol to less than 20,000 g/mol;
a black colorant;
a photopolymerizable monomer;
a photopolymerization initiator; and
a solvent,
wherein:
the solvent includes a first acetate solvent and a second acetate solvent, and
a boiling point difference between the first acetate solvent and the second acetate solvent is about 10° C. to about 60° C.