ORGANIC ELECTROLUMINESCENT DEVICE AND FULL COLOR LIGHT-EMITTING DEVICE
    29.
    发明公开
    ORGANIC ELECTROLUMINESCENT DEVICE AND FULL COLOR LIGHT-EMITTING DEVICE 审中-公开
    所有颜色的有机电致发光和发光器件

    公开(公告)号:EP1933397A4

    公开(公告)日:2008-12-17

    申请号:EP07743779

    申请日:2007-05-21

    申请人: IDEMITSU KOSAN CO

    IPC分类号: H01L51/50 H05B33/12

    摘要: Disclosed is an organic electroluminescent device (10) comprising an anode (1), a first light-emitting layer (3), a charge blocking layer (4), a second light-emitting layer (5) and a cathode (7) sequentially arranged in this order. The first light-emitting layer (3) and the second light-emitting layer (5) respectively contain a host material and a dopant, and the energy gap of the host material of the first light-emitting layer (3) is smaller than the energy gap of the host material of the second light-emitting layer (5). The host material of the first light-emitting layer (3) is a hole transporting material, while the host material of thesecond light-emitting layer (5) is an electron transporting material. The affinity level of the charge blocking layer (4) is lower than the affinity level of the host material of the second light-emitting layer (5) by 0.2 eV or more, and the ionization potential (Ie1) of the charge blocking layer (4) and the ionization potential (Ih1) of the host material of the first light-emitting layer (3) satisfy the following relation (1). Ie1