公开(公告)号：US20240260299A1

公开(公告)日：2024-08-01

申请号：US18529524

申请日：2023-12-05

Applicant: LG Display Co., Ltd. ,  POSTECH Research and Business Development Foundation

Inventor： Kwang Jong KIM ,  Mi Kyung PARK ,  Sun Kap KWON ,  Gi Seong RYU ,  Yong Young NOH

IPC: H10K50/155 ,  H10K59/12

CPC classification number: H10K50/155 ,  H10K59/1201

Abstract: Discussed is a light emitting device including a first electrode and a second electrode facing each other, a hole transport layer, a first emission layer, and an electron transport layer sequentially disposed between the first electrode and the second electrode. In the transport layer, a first material of a metal halide and a second material of an n-type inorganic compound are included. The second material is included as a dopant in the first material. The hole transport layer can contain no organic material and can be amorphous.

公开(公告)号：US20230075718A1

公开(公告)日：2023-03-09

申请号：US17863544

申请日：2022-07-13

Applicant: POSTECH Research and Business Development Foundation

Inventor： Yong Young NOH ,  Hyunjun Kim

IPC: C09D11/52 ,  C08K3/04

Abstract: A method for preparing a nanosheet dispersion solution includes a step of adding a two-dimensional material having a layered structure to a solvent containing at least two materials to weaken an interlayer bonding force, and a step in which a nanosheet, which is exfoliated as the material is attached to a surface thereof by a covalent bond during the exfoliation process, has a repulsive force so as not to agglomerate.
The nanosheet dispersion solution prepared by the preparing method of the inventive concept may be obtained by increasing the surface area of the two-dimensional sheet from the two-dimensional material, may solve the problem of the yield, may reduce a barrier in the charge transfer by reducing the interlayer distance, and may maintain the dispersed phase of the ink prepared by the repulsive force of the nanosheet.