Patents by Inventor Toshiaki SASADA

Toshiaki SASADA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240049596
    Abstract: The present disclosure provides a light emitting device having an anode and a cathode, and a first layer and a second layer disposed between the anode and the cathode.
    Type: Application
    Filed: September 13, 2021
    Publication date: February 8, 2024
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Toshiaki Sasada, Atsushi Asano
  • Publication number: 20240049491
    Abstract: The present disclosure provides a light emitting device having an anode and a cathode, and a first layer and a second layer disposed between the anode and the cathode.
    Type: Application
    Filed: September 13, 2021
    Publication date: February 8, 2024
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Toshiaki Sasada, Atsushi Asano
  • Publication number: 20240040927
    Abstract: The present disclosure provides a light emitting device having an anode and a cathode, and a first layer and a second layer disposed between the anode and the cathode.
    Type: Application
    Filed: September 13, 2021
    Publication date: February 1, 2024
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Toshiaki Sasada, Atsushi Asano
  • Patent number: 11889751
    Abstract: A light emitting device contains an anode, cathode, and two organic layers provided therebetween. One organic layer contains a phosphorescent compound, the second organic layer contains a block copolymer containing an end group, a block that binds to the end group and/or a block that does not bind to the end group, and a crosslinked product of the block copolymer. The non-terminal block contains a non-crosslinkable unit represented by the formula (X) and/or a non-crosslinkable unit represented by the formula (Z). At least one of XI>XII; ZI>ZII; XI+ZI>XII+ZII is satisfied when the total number of units having formula (X) and the total number of units having formula (Z) in the non-terminal block are XI and ZI, respectively, and the total number of units having formula (X) and the total number of units having formula (Z) in the terminal block are XII and ZII, respectively.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: January 30, 2024
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Toshiaki Sasada
  • Publication number: 20230329081
    Abstract: The present disclosure provides a light emitting device having an anode and a cathode, and a first layer and a second layer disposed between the anode and the cathode.
    Type: Application
    Filed: September 13, 2021
    Publication date: October 12, 2023
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Toshiaki Sasada, Atsushi Asano
  • Publication number: 20230320113
    Abstract: The present disclosure provides a light emitting device having an anode and a cathode, and a first layer and a second layer disposed between the anode and the cathode.
    Type: Application
    Filed: September 13, 2021
    Publication date: October 5, 2023
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Toshiaki Sasada, Atsushi Asano
  • Patent number: 11770941
    Abstract: A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: September 26, 2023
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Satoshi Kobayashi, Makoto Anryu, Mika Shirasaki, Hiroyuki Hayasaka, Toshiaki Sasada
  • Patent number: 11588119
    Abstract: A light emitting device having excellent luminance life contains an anode, a cathode, a first organic layer disposed between the anode and the cathode and a second organic layer disposed between the anode and the cathode. The first organic layer contains a compound represented by the formula (C-1), and the second organic layer contains a compound represented by the formula (C-1) and a cross-linked body of a crosslinkable material. Ring R1C and Ring R2C represent an aromatic hydrocarbon ring or an aromatic hetero ring and RC represents an oxygen atom, a sulfur atom or a group represented by the formula (C?-1). Ring R3C and Ring R4C represent an aromatic hydrocarbon ring or an aromatic hetero ring and RC? represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: February 21, 2023
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Rei Okamura
  • Patent number: 11532790
    Abstract: A composition which is useful for producing a light emitting device having excellent external quantum efficiency contains two or more compounds represented by the formula (C-1) and a phosphorescent compound, in which at least one of the compounds represented by the formula (C-1) is a compound in which RC is a group represented by the formula (C?-1). Ring R1C and Ring R2C represent an aromatic hydrocarbon ring or an aromatic hetero ring. RC represents an oxygen atom, a sulfur atom or a group represented by the formula (C?-1). Ring R3C and Ring R4C represent an aromatic hydrocarbon ring or an aromatic hetero ring. RC? represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: December 20, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Naoki Hayashi, Shinichi Inakazu
  • Patent number: 11515477
    Abstract: A light emitting device having excellent external quantum efficiency contains an anode, a cathode, and two organic layers disposed therebetween. One layer contains a phosphorescent transition metal complex and a low molecular weight compound containing no transition metal, and the second layer contains a crosslinked body of a polymer compound (having an energy level of the lowest triplet excited state of 2.30 eV or more) containing a constitutional unit having a crosslinking group. The low molecular weight compound has formula (T-1) and the absolute value of the difference between the energy levels of the lowest triplet excited state and the lowest singlet excited state is less than 0.25 eV. nT1 represents an integer of 0 to 5, nT2 represents an integer of 1 to 10, ArT1 represents a substituted amino group or a monovalent hetero ring group, LT1 represents an alkylene group, and ArT2 represents a hetero ring group.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: November 29, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Shin-Ya Tanaka, Daisuke Fukushima, Atsushi Asano
  • Patent number: 11424410
    Abstract: A light emitting device having an anode, a cathode, a first organic layer and a second organic layer disposed between the anode and the cathode is provided.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 23, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Ryuji Matsumoto, Tomoyasu Yoshida
  • Patent number: 11420930
    Abstract: A composition useful for the production of a light emitting device showing suppressed initial degradation, and a light emitting device formed by using the composition are provided. The composition contains a blended host material and a guest material, in which the host material contains an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed, the guest material contains an aromatic amine compound, and the total amount of a silicon atom contained in the host material and a silicon atom contained in the guest material is 20 ppm by mass or less with respect to the total amount of the host material and the guest material.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: August 23, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Ryuji Matsumoto
  • Publication number: 20220199904
    Abstract: A light emitting device having an anode, a cathode, and an organic layer disposed between the anode and the cathode and containing a composition is described. The composition contains a compound (A) represented by the formula (FH) and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring, and the molecular weight (MA) of the compound (A) and the molecular weight (MB) of the compound (B) satisfy the formula (M1-1) and the formula (M2-1).
    Type: Application
    Filed: March 29, 2019
    Publication date: June 23, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Publication number: 20220190258
    Abstract: A light emitting device is provided which includes an anode, a cathode, and an organic layer disposed between the anode and the cathode and including a composition containing a thermally activated delayed fluorescent compound (A), a boron atom, and a compound (B) having a condensed hetero ring skeleton. The absolute value (|EB?AA|) of a difference between the energy value of the maximum peak of the emission spectrum at 25° C. of compound (B) and the energy value of a peak at the lowest energy side of the absorption spectrum at 25° C. of compound (A) is 0.60 eV or less. The absolute value of a difference between the energy levels of the lowest triplet and singlet excited states of compound (A) is 0.50 eV or less. The absolute value of a difference between the energy levels of the lowest triplet and singlet excited states of compound (B) is 0.50 eV or less.
    Type: Application
    Filed: March 16, 2020
    Publication date: June 16, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Publication number: 20220190251
    Abstract: A composition which is useful for producing a light emitting device having excellent external quantum efficiency and a light emitting device containing the composition are described. The light emitting device contains an anode, a cathode, and an organic layer disposed between the anode and the cathode and contains a composition containing at least two compounds (A) selected from the group consisting of a compound represented by the formula (FH) and a polymer compound containing a constitutional unit having a group obtained by removing from a compound represented by the formula (FH) one or more hydrogen atoms, and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring.
    Type: Application
    Filed: March 16, 2020
    Publication date: June 16, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Publication number: 20220190248
    Abstract: A light emitting device including an anode, a cathode, and an organic layer disposed between the anode and the cathode and containing a composition is provided. The composition contains two or more compounds (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring. Compound (B) contains a compound (B1) and a compound (B2) which satisfy at least one of the following formulas: EB1<EB2 and AB1<AB2. EB1 represents the maximum peak wavelength of the emission spectrum at 25° C. of compound (B1), EB2 represents the maximum peak wavelength of the emission spectrum at 25° C. of compound (B2), AB1 represents the peak wavelength at the lowest energy side of the absorption spectrum at 25° C. of compound (B1), and AB2 represents the peak wavelength at the lowest energy side of the absorption spectrum at 25° C. of compound (B2).
    Type: Application
    Filed: March 16, 2020
    Publication date: June 16, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Publication number: 20220173336
    Abstract: A composition which is useful for producing a light emitting device having excellent light emission efficiency and a light emitting device containing the composition are described. The light emitting device contains an anode, a cathode, and an organic layer disposed between the anode and the cathode and contains a composition containing a metal complex represented by the formula (2), and a compound (B) having a condensed hetero ring skeleton (b) containing a boron atom and at least one selected from the group consisting of an oxygen atom, a sulfur atom, a selenium atom, an sp3 carbon atom and a nitrogen atom in the ring.
    Type: Application
    Filed: March 16, 2020
    Publication date: June 2, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Patent number: 11339134
    Abstract: A composition which is useful for production of a light emitting device excellent in light emission efficiency is provided. In particular, provided is a composition containing a compound represented by formula (1) and a phosphorescent compound, wherein R1 and R2 each independently represent a substituent, n1 represents an integer of 1 to 14, and Ar1 represents an arylene group or a divalent heterocyclic group, and at least one of one or more groups Ar1 is a group represented by the formula (1-A), wherein the variable groups R1A to R8A, R91A, and R92A are as defined in the specification.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: May 24, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toshiaki Sasada, Takashi Kuragano, Yoshiaki Tsubata, Makoto Anryu, Takakazu Saito
  • Publication number: 20220109107
    Abstract: A composition which is useful for producing a light emitting device of which initial deterioration is suppressed and a light emitting device formed using the composition are described. The composition contains a host material and a guest material blended therein; the host material contains an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed, the guest material contains a compound having a heterocyclic group containing a carbon atom and at least one selected from a boron atom, a nitrogen atom, a phosphorus atom, an oxygen atom, a sulfur atom and a selenium atom in the ring, and the total amount of silicon atoms contained in the host material and in the guest material is over 0 ppm by mass and 28 ppm by mass or less with respect to the total amount of the host material and the guest material.
    Type: Application
    Filed: December 6, 2019
    Publication date: April 7, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO
  • Publication number: 20220102642
    Abstract: A composition which is useful for production of a light emitting device of which initial deterioration is suppressed, and a light emitting device formed using the composition, are provided. The composition contains a host material and a guest material blended therein. The host material contains an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed. The guest material contains an aromatic amine compound. The total amount of sodium atoms contained in the host material and sodium atoms contained in the guest material is 400 ppb by mass or less with respect to the total amount of the host material and the guest material.
    Type: Application
    Filed: December 6, 2019
    Publication date: March 31, 2022
    Inventors: Toshiaki SASADA, Ryuji MATSUMOTO