公开(公告)号：US20250084305A1

公开(公告)日：2025-03-13

申请号：US18273977

申请日：2021-01-28

Applicant: SHARP KABUSHIKI KAISHA ,  TOPPAN INC.

Inventor： TADASHI KOBASHI ,  HIROHISA YAMADA ,  TAKAHIRO DOE ,  Keisuke KITANO ,  Masaki YAMAMOTO ,  Yuko OGURA ,  Masanori TANAKA ,  Mikihiro TAKASAKI ,  Yuka TAKAMIZUMA ,  Soichiro NIKATA ,  Tetsuji ITO ,  Mayuko WATANABE

IPC: C09K11/08 ,  H10K50/115 ,  H10K50/16

Abstract: A QD is a Cd-free quantum dot including a core and a shell and configured to emit blue light. The core at least contains Zn and Se. The shell has a film thickness in a range from 0.5 nm to 3 nm, contains Zn, Se, and S in a boundary portion adjacent to the core, and contains Zn and S in an outermost portion.

公开(公告)号：US20230084597A1

公开(公告)日：2023-03-16

申请号：US17799624

申请日：2021-02-12

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Masaki YAMAMOTO ,  TADASHI KOBASHI

IPC: H01L51/50 ,  H01L51/00

Abstract: Provided is a light-emitting element having a high external quantum efficiency and a method for manufacturing the same. The light-emitting element is provided with a light-emitting layer, an electron transport layer, and an organic silicon compound. The light-emitting layer contains quantum dots. The electron transport layer is positioned on the light-emitting layer. The electron transport layer contains metal oxide particles. The organic silicon compound is positioned between the light-emitting layer and the electron transport layer. The organic silicon compound has at least one hydrocarbon group.

公开(公告)号：US20220359845A1

公开(公告)日：2022-11-10

申请号：US17619150

申请日：2019-07-04

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TADASHI KOBASHI ,  Masaki YAMAMOTO

IPC: H01L51/50 ,  H01L51/56 ,  H01L51/52

Abstract: A light-emitting element includes, in sequence, an anode, a hole transport layer, a luminous layer containing a plurality of quantum dots, an electron transport layer, and a cathode. The electron transport layer includes a plurality of inorganic nanoparticles having electron transportability, and an organic layer having electron transportability. The organic layer partly contains the plurality of inorganic nanoparticles, and includes a plurality of first hollows in an interface adjacent to the luminous layer. The plurality of first hollows are filled with the plurality of quantum dots.

公开(公告)号：US20240224571A1

公开(公告)日：2024-07-04

申请号：US18288293

申请日：2021-06-07

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TADASHI KOBASHI ,  HIROHISA YAMADA ,  Masaki YAMAMOTO

IPC: H10K50/15 ,  H10K50/115

CPC classification number: H10K50/15 ,  H10K50/115

Abstract: A light-emitting element includes a first electrode; a second electrode facing the first electrode; a light-emitting layer provided between the first electrode and the second electrode; a first charge transport layer provided between the first electrode and the light-emitting layer, and a middle layer provided between the first charge transport layer and the light-emitting layer. The middle layer contains at least one first component selected from SiO2, SiO, a metal oxide, and a metal fluoride.

公开(公告)号：US20210050543A1

公开(公告)日：2021-02-18

申请号：US16968543

申请日：2018-02-13

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TADASHI KOBASHI ,  YOSHIHIRO UETA ,  MAKOTO IZUMI ,  NOBORU IWATA

IPC: H01L51/50 ,  H01L51/56

Abstract: The light-emitting device includes, between an anode electrode and a cathode electrode, a light-emitting layer, a hole transport layer, and an electron transport layer. The light-emitting layer includes quantum dots configured to emit light as a result of combination of positive holes and electrons. The electron transport layer includes a metal oxide, and an energy level of a lower end of a conduction band of the metal oxide is less than or equal to an energy level of a lower end of a conduction band of the quantum dots.

公开(公告)号：US20220344548A1

公开(公告)日：2022-10-27

申请号：US17762871

申请日：2019-10-01

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KENICHI YOSHIMURA ,  TADASHI KOBASHI ,  TATSUYA RYOHWA ,  MAKOTO IZUMI

IPC: H01L33/50

Abstract: A light-emitting element according to the disclosure includes an anode electrode, a cathode electrode, and a first light-emitting layer that includes a plurality of first quantum dots and emits light of a first color. The first light-emitting layer is provided between the anode electrode and the cathode electrode, and each of the plurality of first quantum dots includes a compound containing each of three elements of Zn, Se, and Te. A combination of an average particle size of the plurality of first quantum dots and a composition ratio of the three elements is selected such that the peak wavelength of a light emission spectrum of the first light-emitting layer is greater than 394 nm and equal to or less than 474 nm.

公开(公告)号：US20210313534A1

公开(公告)日：2021-10-07

申请号：US17265013

申请日：2018-08-03

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TADASHI KOBASHI ,  KENICHI YOSHIMURA ,  MASASHI KAGO ,  NOBORU IWATA

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/52 ,  C09K11/88 ,  C09K11/70 ,  C09K11/08

Abstract: An electroluminescent element according to an aspect of the disclosure includes: a pair of a cathode electrode and an anode electrode; a light-emitting layer provided between the cathode electrode and the anode electrode; an electron transport layer provided between the cathode electrode and the light-emitting layer; and a hole transport layer provided between the anode electrode and the light-emitting layer. The light-emitting layer includes ZnSe-based quantum dots including ZnSe and one of the electron transport layer and the hole transport layer is composed of ZnO particles having an average particle size of 3 nm or greater and 30 nm or less.

公开(公告)号：US20210020699A1

公开(公告)日：2021-01-21

申请号：US17040929

申请日：2018-03-28

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KENICHI YOSHIMURA ,  TADASHI KOBASHI ,  MASASHI KAGO ,  TATSUYA RYOHWA ,  MAKOTO IZUMI

IPC: H01L27/32 ,  H01L51/52 ,  H01L51/50 ,  G02F1/1335

Abstract: A light-emitting device includes: an anode electrode; a cathode electrode; a plurality of light-emitting layers sandwiched between the anode electrode and the cathode electrode; and a light absorption layer disposed between the plurality of light-emitting layers and a light extraction surface, wherein the plurality of light-emitting layers include InP based quantum dots and are configured to emit at least green color of light and red color of light, and the light absorption layer selectively absorbs light at 570 to 610 nm.