US 12,258,506 B2
Films comprising bright silver based quaternary nanostructures
Ravisubhash Tangirala, Fremont, CA (US); Jay Yamanaga, Campbell, CA (US); Wenzhou Guo, San Jose, CA (US); Christopher Sunderland, San Jose, CA (US); Ashenafi Damtew Mamuye, Milpitas, CA (US); Chunming Wang, Milpitas, CA (US); Eunhee Hwang, Suwon-si (KR); and Nahyoung Kim, Incheon (KR)
Assigned to SHOEI CHEMICAL INC., Tokyo (JP)
Filed by Shoei Chemical Inc., Tokyo (JP)
Filed on Mar. 7, 2024, as Appl. No. 18/598,475.
Application 18/598,475 is a continuation of application No. 17/846,357, filed on Jun. 22, 2022, granted, now 11,926,776.
Application 17/846,357 is a continuation of application No. 17/166,788, filed on Feb. 3, 2021, granted, now 11,407,940, issued on Aug. 9, 2022.
Claims priority of provisional application 63/129,378, filed on Dec. 22, 2020.
Prior Publication US 2024/0209257 A1, Jun. 27, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/02 (2006.01); B82Y 20/00 (2011.01); C08J 5/18 (2006.01); C09K 11/62 (2006.01); G02B 1/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C09K 11/621 (2013.01) [C08J 5/18 (2013.01); C09K 11/025 (2013.01); G02B 1/002 (2013.01); G02F 1/133603 (2013.01); G02F 1/133614 (2021.01); B82Y 20/00 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08J 2329/10 (2013.01); G02F 2202/36 (2013.01)] 17 Claims
OG exemplary drawing
 
1. Nanostructures comprising:
Ag, In, Ga, and S (AIGS); and
at least one ligand,
wherein the nanostructures comprise a gradient of more gallium at a surface of the nanostructures to less gallium in a center of the nanostructures;
wherein the nanostructures have a peak emission wavelength (PWL) between 480 and 545 nm;
wherein the nanostructures have an emission spectrum with a full width half maximum (FWHM) of less than 40 nm; and
wherein the nanostructures have an emission quantum yield (QY) of 80 to 99.9%.