公开(公告)号：US20220195289A1

公开(公告)日：2022-06-23

申请号：US17451602

申请日：2021-10-20

Applicant: Samsung Display Co., Ltd.

Inventor： JAEKOOK HA ,  YUNKU JUNG

IPC: C09K11/02 ,  H01L51/50 ,  H01L27/32

Abstract: A quantum dot composition according to one or more embodiments includes a quantum dot, a first ligand including a first head portion bonded to a surface of the quantum dot and a first tail portion having a crosslinkable functional group at a terminal of the first ligand, and a second ligand bonded to the surface of the quantum dot and being shorter in length than the first ligand. A quantum dot composition according to one or more embodiments is applied to a light-emitting element and a display device, and thus, it is possible to improve a luminous efficiency and element lifespan of the light-emitting element and the display device.

公开(公告)号：US20220169878A1

公开(公告)日：2022-06-02

申请号：US17445916

申请日：2021-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： JUNBO SIM ,  DUKKI KIM ,  SEHUN KIM ,  HYOJIN KO ,  JAEKOOK HA

IPC: C09D11/36

Abstract: An ink composition for forming an electron transport region in a light emitting element includes inorganic nanoparticles and a first solvent having a Hansen solubility parameter hydrogen bonding term (δH) value of 5 or less in order to increase dispersion stability of the inorganic nanoparticles, and thereby prevent or reduce nozzle clogging in the head of an inkjet printing device.