公开(公告)号：US07601439B2

公开(公告)日：2009-10-13

申请号：US11284968

申请日：2005-11-23

申请人： Min-Seung Chun ,  Jun-Yeob Lee ,  Yong-Joong Choi

发明人： Min-Seung Chun ,  Jun-Yeob Lee ,  Yong-Joong Choi

IPC分类号： H01L51/54

CPC分类号： C09K11/06 ,  C09K2211/1048 ,  C09K2211/185 ,  Y10S428/917

摘要： An organic electroluminescent device includes an emission layer interposed between a first electrode and a second electrode. The emission layer may be composed of a host material and a phosphorescent dopant material. The host material may be composed of a mixture of a hole transport material and an electron transport material. The hole transport material may be a carbazole compound and the electron transport material may include at least a compound selected from spirofluorenes and organic metal complexes. The use of the mixture facilitates the re-combination of holes and electrons in neighboring organic layers, thus decreasing the driving voltage and increasing the luminous efficiency and lifetime of the organic electroluminescent device.

摘要翻译： 有机电致发光器件包括插入在第一电极和第二电极之间的发射层。 发光层可以由主体材料和磷光掺杂剂材料构成。 主体材料可以由空穴传输材料和电子传输材料的混合物组成。 空穴传输材料可以是咔唑化合物，并且电子传输材料可以包括至少一种选自螺芴和有机金属络合物的化合物。 使用该混合物有助于相邻有机层中的空穴和电子的重新组合，从而降低驱动电压并增加有机电致发光器件的发光效率和寿命。