US 12,238,949 B2
Method of preparing light-emitting material, light-emitting material prepared by method, and light-emitting device including light-emitting material
YongChurl Kim, Seoul (KR); and Nam-Gyu Park, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR); and RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY, Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and Research & Business Foundation SUNGKYUNKWAN UNIVERSITY, Suwon-si (KR)
Filed on May 25, 2021, as Appl. No. 17/329,664.
Claims priority of application No. 10-2020-0126372 (KR), filed on Sep. 28, 2020.
Prior Publication US 2022/0102634 A1, Mar. 31, 2022
Int. Cl. H10K 50/115 (2023.01); C01G 19/00 (2006.01); C01G 21/00 (2006.01); C09K 11/66 (2006.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01)
CPC H10K 50/115 (2023.02) [C09K 11/665 (2013.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); C01G 19/006 (2013.01); C01G 21/006 (2013.01); C01P 2002/34 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of preparing a light-emitting material, the method comprising:
mixing a first precursor solution comprising a first precursor and a first solvent with a second precursor solution comprising a second precursor and a second solvent to form a precipitate; and
separating the precipitate to obtain the light-emitting material, wherein the light-emitting material comprises a light-emitting compound represented by at least one of Formula 3, Formula 4, or Formula 5:
A3B3X33;  Formula 3,
A4B42X45;  Formula 4,
A54B5X56;  Formula 5,
wherein, in Formulae 3, 4, and 5,
A3, A4, and each A5 are independently an alkali metal,
B3, B4, and B5 are independently Pb, Sn, or a combination thereof, and
each of X3, X4, and X5 are independently a halogen;
wherein a solubility of the first precursor in the first solvent is greater than a solubility of the first precursor in the second solvent, and
a solubility of the second precursor in the second solvent is greater than a solubility of the second precursor in the first solvent.