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    • 2. 发明公开
    • AN ORGANIC ELECTROLUMINESCENCE DEVICE COMPRISING A LIGHT EMITTING LAYER COMPRISING THREE DIFFERENT COMPOUNDS AND AN ELECTRONIC EQUIPMENT COMPRISING SAID ORGANIC ELECTROLUMINESCENCE DEVICE
    • EP4199130A1
    • 2023-06-21
    • EP21214611.2
    • 2021-12-15
    • Idemitsu Kosan Co.,Ltd.
    • Lin, Chao-ChenChebotareva, Natalia
    • H01L51/54
    • An organic electroluminescence device comprising a cathode, an anode and an emitting layer having an anode side and a cathode side disposed between the cathode and the anode, and a further layer next to the anode side of the emitting layer wherein
      the emitting layer comprises
      (i) At least one compound with a dipole moment of less than 1.7 10 -30 Cm (0.5 debye), preferably less than 1.3 10 -30 Cm (0.4 debye), more preferably 1.0 10 -30 Cm (0.3 debye), as component (1);
      (ii) At least one organic fluorescent compound whose onset of fluorescence is at lower energies than that of component (1) and at an energy higher than 2.6 eV, whose photoluminescence quantum yield is higher than 70% and whose ionization potential in absolute values is higher than 5.33 eV, as component (2);
      (iii) At least one organic compound whose ionization potential in absolute values is lower than 5.33 eV and whose onset of fluorescence is at higher energies than that of component (2), as component (3); and

      the further layer comprising a compound fulfilling the following requirement:
      Ionization potential in absolute values of component (1) - Ionization potential in absolute values of component (4) ≤ 0.35 eV,; a material being in form of a layer structure comprising a layer comprising components (1), (2) and (3) and a further layer comprising a compound fulfilling the following requirement:
      Ionization potential in absolute values of component (1) - Ionization potential in absolute values of component (4) ≤ 0.35 eV; a composition comprising components (1), (2) and (3), wherein component (3) is present in the composition in an amount of 5% by weight or less, preferably in an amount of 0.5% to 5% by weight, based on the total amount of the composition; an organic electroluminescence device comprising the inventive composition; an electronic equipment comprising said organic electroluminescence device; and the use of said material or said composition in an organic electroluminescence device.