Organic electroluminescent devices

    公开(公告)号:US09735368B2

    公开(公告)日:2017-08-15

    申请号:US13932595

    申请日:2013-07-01

    Abstract: An organic electroluminescent element that includes a light-emitting layer composed of a light-emitting composition containing at least one type of host material and at least one type of light-emitting material is provided. The host material is a fluorescent anthracene derivative, which fluoresces blue light under DC current with a current density of 25 mA/cm2. If λ (nm) is taken to be the shortest wavelength of all the wavelengths at which the intensity of PL emission of a film composed only of the aforementioned host material is one-half the maximum emission intensity, then the intensity of PL emission at the aforementioned wavelength λ of a film composed of the aforementioned light-emitting composition is no more than 1/10 the maximum emission intensity of PL emission of the film composed of the aforementioned light-emitting composition, and the PL emission of the film composed of the aforementioned light-emitting composition satisfies CIE y≦0.08.

    ORGANIC ELECTROLUMINESCENT DEVICES
    7.
    发明申请
    ORGANIC ELECTROLUMINESCENT DEVICES 有权
    有机电致发光器件

    公开(公告)号:US20140008621A1

    公开(公告)日:2014-01-09

    申请号:US13932595

    申请日:2013-07-01

    Abstract: An organic electroluminescent element that includes a light-emitting layer composed of a light-emitting composition containing at least one type of host material and at least one type of light-emitting material is provided. The host material is a fluorescent anthracene derivative, which fluoresces blue light under DC current with a current density of 25 mA/cm2. If λ (nm) is taken to be the shortest wavelength of all the wavelengths at which the intensity of PL emission of a film composed only of the aforementioned host material is one-half the maximum emission intensity, then the intensity of PL emission at the aforementioned wavelength λ of a film composed of the aforementioned light-emitting composition is no more than 1/10 the maximum emission intensity of PL emission of the film composed of the aforementioned light-emitting composition, and the PL emission of the film composed of the aforementioned light-emitting composition satisfies CIE y≦0.08.

    Abstract translation: 提供一种有机电致发光元件,其包括由含有至少一种类型的主体材料和至少一种类型的发光材料的发光组合物构成的发光层。 主体材料是荧光蒽衍生物,其在直流电流下以25mA / cm 2的电流密度发出蓝光。 如果λ(nm)被认为是仅由上述主体材料构成的膜的PL发射强度的最大波长的最短波长为最大发射强度的一半,则在 由上述发光组合物构成的膜的上述波长λ不大于由上述发光组合物构成的膜的PL发射的最大发光强度的1/10,由 上述发光组合物满足CIE y0.08。

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