Perovskite nanoparticles and light-emitting composition comprising an organic siloxane solvent, and methods for producing the same
The present disclosure relates to a perovskite light-emitting composition, and a method for preparing the same. The method for producing the perovskite light-emitting composition of the present disclosure includes an organic siloxane solvent having very high hydrophobicity and low surface tension as a synthesis solvent, thereby having a large surface tension difference from the perovskite light-emitting particles containing an organic ligand. Through these properties, a dense organic ligand can be attached to the surface of the perovskite nanoparticles, and perovskite light-emitting particles having a high ligand density can be prepared. Accordingly, the perovskite light-emitting particles prepared by the method of the present disclosure have improved dispersion stability, light-emitting properties and long-term storage stability.
1 . A manufacturing method of a perovskite light-emitting composition comprising:
preparing a first solution containing a perovskite precursor and an organic solvent;
preparing a second solution containing an organic siloxane solvent, a surfactant and optionally an organic solvent;
forming perovskite light-emitting particles by injecting the first solution into the second solution and then mixing; and
purifying the perovskite light-emitting particles,
wherein the perovskite light-emitting particles synthesized using an organic siloxane solvent have organic ligands attached to the surface of the particles during the synthesis process,
wherein the organic solvent used in the second solution is for dissolving and dispersing the siloxane solvent and the surfactant, and
wherein the organic siloxane solvent exhibits repulsion against the organic ligand.
2 . The manufacturing method of the perovskite light-emitting composition of claim 1 , wherein a difference in surface energy between an organic ligand of the perovskite light-emitting particle and the organic siloxane solvent is 7 to 15 dyne/cm.
3 . The manufacturing method of the perovskite light-emitting particle composition of claim 1 , wherein the organic siloxane solvent includes the following Chemical Formula 1, Chemical Formula 2, Chemical Formula 3, Chemical Formula 4 or a combination thereof
in Chemical Formula 1, Ra and Rb are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms or an aryl group having 6 to 25 carbon atoms, and m is an integer of 3 to 6,
in Chemical Formula 2, Ra to Rd are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms or an aryl group having 6 to 25 carbon atoms, and m or n is independently an integer of 3 to 10,
in Chemical Formula 3, R 1 to R 8 are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms or an aryl group having 6 to 25 carbon atoms, and n is an integer of 3 to 100,
in Chemical Formula 4, R 1 to R 10 are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms or an aryl group having 6 to 25 carbon atoms, and m or n is independently an integer of 3 to 10.
4 . The manufacturing method of the perovskite light-emitting composition of claim 1 , wherein the organic siloxane solvent comprises at least one selected from hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, phenylhydrocyclosiloxanes, hexaphenylcyclotrisiloxane, 1,3,5,7-Tetramethyl-1,3,5,7-tetramethoxycyclotetrasiloxane, 1,3,5,7-Tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane, and derivatives thereof.
5 . The manufacturing method of the perovskite light-emitting composition of claim 1 , wherein the organic siloxane solvent has a viscosity of 0.5 to 2,000 cps at 25° C.
6 . The manufacturing method of the perovskite light-emitting composition of claim 1 , wherein the organic siloxane solvent has a surface tension of 15 to 23 dyne/cm.
7 . The manufacturing method of the perovskite light-emitting composition of claim 1 , wherein the surfactant is at least one selected from an amine surfactant, an organic acid surfactant, and an organic ammonium surfactant.
8 . The manufacturing method of the perovskite light-emitting composition of claim 7 , wherein the amine surfactant is at least one selected from hexylamine, octylamine, decylamine, oleylamine, N,N-diisopropylethylamine, ethylenediamine, hexamethylenetetramine, methylamine, N,N, N, N-tetramethyethylene diamine, triethylamine, diethanolamine, 2,2-(ethylenedioxyl)bis-(ethylamine), 2-methyl-1,5-pentanediamine, 3-methoxytriphenyl-amine, 1,4-phenylenediamine, N,N,N,N-pentamethyl diethylenetriamine, triethylenetetramine, rhodamine, and diethylamine.
9 . The manufacturing method of the perovskite light-emitting composition of claim 7 , wherein the organic acid surfactant is a carboxylic acid surfactant or a phosphonic acid surfactant.
10 . The manufacturing method of the perovskite light-emitting composition of claim 9 , wherein the carboxylic acid surfactant is at least one selected from 4,4′-Azobis (4-cyanovaleric acid), Acetic acid, 5-Aminosalicylic acid, acrylic acid, L-aspartic acid, 6-bromohexanoic acid, bromoacetic acid, dichloroacetic acid, ethylenediaminetetraacetic acid, isobutyric acid, itaconic acid, maleic acid, 4-maleimidobutyric acid, L-malic acid, 4-nitrobenzoic acid, 1-pyrenecarboxylic acid and oleic acid.
11 . The manufacturing method of the perovskite light-emitting composition of claim 9 , wherein the phosphonic acid surfactant is at least one selected from n-hexylphosphonic acid, n-octylphosphonic acid, n-decylphosphonic acid, n-dodecylphosphonic acid, n-tetradecylphosphonic acid, n-hexadecylphosphonic acid, n-octadecyl phosphonic acid, benzyl phosphonic acid, and benzhydryl phosphonic acid.