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公开(公告)号：US11424418B2
公开(公告)日：2022-08-23
申请号：US16848392
申请日：2020-04-14
发明人： Jianhua Cao , Zhe Shao , Yan Sui , Minhui Jia , Shibo Wang , Weizhuang He
摘要： The present invention relates to an organic electroluminescent material, an organic electroluminescent device, and a method for preparing the organic electroluminescent device. Due to comprising an organic compound A with 3.0 eV>ET≥2.0 eV and a compound B of M(LA)x(LB)y(LC)z, the organic electroluminescent material of the present invention has the advantages of an increased luminescence lifetime and/or a reduced operating voltage on the basis of maintaining other electronic properties at a certain level.
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公开(公告)号：US10577325B2
公开(公告)日：2020-03-03
申请号：US15714295
申请日：2017-09-25
发明人： Jianhua Cao , Shibo Wang , Ruimao Hua
IPC分类号： C07D209/86 , C07D209/88 , H01L51/00 , H01L51/50 , C09K11/06
摘要： Disclosed are a method for preparing a series of carbazole derivatives and use thereof in organic light-emitting diodes. The structure of the material is as shown in Formula I. An organic electroluminescent device prepared by the material can have a significantly improved power efficiency and an external quantum efficiency for the device and an extended life for an orange light or red light device; moreover, the material has characteristics, for example, methods for the synthesis and purification of the material are simple and suitable for large-scale production, and is an ideal choice as a luminescent material for organic electroluminescent devices. The use of the organic electroluminescent diode material as a carrier transport material or as a luminescent material alone or as a host material in a light-emitting layer also falls within the scope of protection.
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公开(公告)号：US11462694B2
公开(公告)日：2022-10-04
申请号：US16631006
申请日：2018-08-29
发明人： Jianhua Cao , Liang Dong , Shibo Wang , Jianchuan Zhang , Yan Sui , Ruimao Hua
IPC分类号： H01L51/00 , C07D471/04 , C07D471/14 , H01L27/32 , H01L51/50 , C09K11/06
摘要： There is provided an imidazole derivative, wherein the structural formula of the imidazole derivative is as represented by formula I: There is further provided a material containing the imidazole derivative and an organic light-emitting device containing the imidazole derivative. The imidazole derivative has an excellent carrier transport capacity, and the organic light-emitting device produced by using the material has obviously reduced starting voltage and improved luminous efficiency and luminance; and due to the features such as relatively good film-forming performance and simple material synthesis and purification methods which are applicable to mass production, the imidazole derivative is an ideal option for an electron transport material of organic light-emitting devices.
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