公开(公告)号：US09735368B2

公开(公告)日：2017-08-15

申请号：US13932595

申请日：2013-07-01

Applicant: UDC Ireland Limited

Inventor： Kuniyuki Kaminaga ,  Wataru Sotoyama ,  Masaru Kinoshita ,  Daisuke Inoue

IPC: H01L51/50 ,  H01L51/00 ,  C09K11/06 ,  H05B33/14

CPC classification number: H01L51/0052 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1014 ,  H01L51/0058 ,  H01L51/006 ,  H01L51/0073 ,  H01L51/5012 ,  H05B33/14

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.

公开(公告)号：US09412964B2

公开(公告)日：2016-08-09

申请号：US13914540

申请日：2013-06-10

Applicant: UDC Ireland Limited

Inventor： Wataru Sotoyama ,  Daisuke Inoue

IPC: H01L51/50 ,  H01L51/00

CPC classification number: H01L51/5092 ,  H01L51/0058 ,  H01L51/006 ,  H01L51/0081 ,  H01L51/0085 ,  H01L51/5004 ,  H01L51/5064 ,  H01L51/5088

Abstract: [It is an object] to provide an organic electroluminescent element with which the initial durability of the element can be greatly improved while maintaining the efficiency of the element at a high level. This is an organic electroluminescent element having an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light-emitting layer, and a cathode, in this order, with this organic electroluminescent element being such that the aforementioned hole injection layer includes a material for which the energy of the lowest unoccupied molecular orbital (LUMO) is less than −4.0 eV and also such that the energy E1(LUMO) of the LUMO of the material included in the aforementioned first hole transport layer and the energy E2(LUMO) of the LUMO of the material included in the aforementioned second hole transport layer satisfy [the inequality] E1(LUMO)>E2(LUMO).

Abstract translation: 本发明是提供一种有机电致发光元件，通过该有机电致发光元件可以极大地提高元件的初始耐久性，同时将元件的效率保持在高水平。 这是一种具有阳极，空穴注入层，第一空穴传输层，第二空穴传输层，发光层和阴极的有机电致发光元件，该有机电致发光元件使得 上述空穴注入层包括最低未占分子轨道（LUMO）的能量小于-4.0eV的材料，并且还使得包含在上述第一空穴传输层中的材料的LUMO的能量E1（LUMO） 并且包含在上述第二空穴传输层中的材料的LUMO的能量E2（LUMO）满足[不等式] E1（LUMO）> E2（LUMO）。

公开(公告)号：US20140008621A1

公开(公告)日：2014-01-09

申请号：US13932595

申请日：2013-07-01

Applicant: UDC Ireland Limited

Inventor： Kuniyuki Kaminaga ,  Wataru Sotoyama ,  Masaru Kinoshita ,  Daisuke Inoue

IPC: H01L51/00

CPC classification number: H01L51/0052 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1014 ,  H01L51/0058 ,  H01L51/006 ,  H01L51/0073 ,  H01L51/5012 ,  H05B33/14

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。