Provided are a hole-injecting material for an organic electroluminescent device (organic EL device) exhibiting high luminous efficiency at a low voltage and having greatly improved driving stability, and an organic EL device using the material. The hole-injecting material for an organic EL device is selected from benzenehexacarboxylic acid anhydrides, benzenehexacarboxylic acid imides, or N-substituted benzenehexacarboxylic acid imides. Further, the organic EL device has at least one light-emitting layer and at least one hole-injecting layer between an anode and a cathode arranged opposite to each other, and includes the above-mentioned hole-injecting material for an organic EL device in the hole-injecting layer. The organic EL device may contain a hole-transporting material having an ionization potential (IP) of 6.0 eV or less in the hole-injecting layer or a layer adjacent to the hole-injecting layer.
本文提供了一种用于有机电致发光器件(有机 EL 器件)的空穴注入材料,该材料在低电压下具有高发光效率,并且大大提高了驱动稳定性,还提供了一种使用该材料的有机 EL 器件。有机电致发光器件的注入孔材料选自苯六
羧酸酐、苯六
羧酸亚胺或 N-取代苯六
羧酸亚胺。进一步地,有机电致发光器件具有至少一个发光层和至少一个位于相对布置的阳极和阴极之间的空穴注入层,并在空穴注入层中包括上述用于有机电致发光器件的空穴注入材料。有机电致发光器件可在空穴注入层或与空穴注入层相邻的层中包含电离电势(IP)为 6.0 eV 或更低的空穴传输材料。