Method for manufacturing perovskite nanocrystal particle light-emitter where organic ligand is substituted, nanocrystal particle light-emitter manufactured thereby, and light emitting device using same

1. Perovskite nanocrystal particle light-emitter, in which a first organic ligand is substituted with a second organic ligand,

wherein the perovskite nanocrystal particle light-emitter comprises a perovskite nanocrystal and a plurality of first organic ligands surrounding a surface of the perovskite nanocrystal; and at least one first organic ligand is substituted with a second organic ligand which has a length less than that of each of the first organic ligands.

2. The perovskite nanocrystal particle light-emitter of claim 1 ,

wherein each of the first organic ligand and the second organic ligand comprises alkyl halide, and a halogen element of the second organic ligand comprises an element having affinity higher than that of a halogen element of the first organic ligand with respect to a center metal of the perovskite nanocrystal structure.

3. The perovskite nanocrystal particle light-emitter of claim 1 ,

wherein each of the first organic ligand and the second organic ligand comprises at least a ligand selected from carboxylic acid surfactant and amine surfactant.

4. The perovskite nanocrystal particle light-emitter of claim 1 ,

wherein the second organic ligand comprises a hydrophobic ligand.

5. The perovskite nanocrystal particle light-emitter of claim 1 ,

wherein the organic ligand comprises a phenyl group or fluorine group.

6. The perovskite nanocrystal particle light-emitter of claim 2 ,

wherein alkyl halide comprises a structure of alkyl-X,

wherein X is a halogen element and include Cl, Br, or I, and the alkyl structure includes acyclic alkyl having a structure of C n X 2n+1 , primary alcohol having a structure such as C n H 2n+1 OH, secondary alcohol, tertiary alcohol, alkylamine, p-substituted aniline, phenyl ammonium, or fluorine ammonium.

7. The perovskite nanocrystal particle light-emitter of claim 6 ,

wherein alkylamine includes alkyl and amine (NH 3 ) structure.

8. The perovskite nanocrystal particle light-emitter of claim 3 ,

wherein carboxylic acid surfactant include a 4,4′-azobis(4-cyanovaleric acid), an acetic acid, a 5-aminosalicylic acid, an acrylic acid, an L-aspentic acid, a 6-bromohexanoic acid, a bromoacetic acid, a dichloro acetic acid, an ethylenediaminetetraacetic acid, an isobutyric acid, an itaconic acid, a maleic acid, an r-maleimidobutyric acid, an L-malic acid, a 4-nitrobenzoic acid, a 1-pyrenecarboxylic acid, or an oleic acid.

9. The perovskite nanocrystal particle light-emitter of claim 1 , wherein the perovskite nanocrystal particle has a size of 1 nm to 900 nm.

10. The perovskite nanocrystal particle light-emitter of claim 1 , wherein the perovskite nanocrystal particle has bandgap energy determined by the crystal structure without depending on a particle size.

11. The perovskite nanocrystal particle light-emitter of claim 1 , wherein the perovskite comprises a structure of ABX 3 , A 2 BX 4 , ABX 4 , or A n−1 Pb n X 3n+1 (where n is an integer between 2 to 6), and

the A is an organic ammonium material, the B is a metal material, and the X is a halogen element.

12. The perovskite nanocrystal particle light-emitter of claim 1 , wherein the inorganic metal halide perovskite comprises a structure of ABX 3 , A 2 BX 4 , ABX 4 , or A n−1 Pb n X 3n+1 (where n is an integer between 2 to 6), and

the A is an alkali metal, the B is a metal material, and the X is a halogen element.

13. The perovskite nanocrystal particle light-emitter of claim 11 , wherein the A is (CH 3 NH 3 ) n , ((C x H 2x+1 ) n NH 3 ) 2 (CH 3 NH 3 ) n , (RNH 3 ) 2 , C n H 2n+1 NH 3 ) 2 , CF 3 NH 3 , (CF 3 NH 3 ) n , (C x F 2x+1 ) n NH 3 ) 2 (CF 3 NH 3 ) n , (C x F 2x+1 ) n NH 3 ) 2 , (CH(NH 2 ) 2 ), C x H 2x+1 (C(NH 2 ) 2 ), or (C n F 2n+1 NH 3 ) 2 (where n is an integer equal to or greater than 1, and x is an integer equal to or greater than 1),

the B is a divalent transition metal, a rare earth metal, an alkali earth metal, Pb, Sn, Ge, Ga, In, Al, Sb, Bi, Po, or a combination thereof, and

the X is Cl, Br, I, or a combination thereof.

14. The perovskite nanocrystal particle light-emitter of claim 12 ,

wherein the A is Na, K, Rb, Cs, or Fr,

the B is a divalent transition metal, a rare earth metal, an alkali earth metal, Pb, Sn, Ge, Ga, In, Al, Sb, Bi, Po, or a combination thereof, and

the X is Cl, Br, I, or a combination thereof.

15. A light emitting device comprising:

a first electrode;

a second electrode; and

a light emitting layer disposed between the first electrode and the second electrode and comprising the perovskite nanocrystal particle light-emitter of claim 1 .

16. A solar cell comprising:

a first electrode;

a second electrode; and

a photoactive layer disposed between the first electrode and the second electrode and comprising the organic-inorganic-hybrid perovskite nanocrystal particle light-emitter of claim 1 .