The present invention aims to provide an organic thin film that imparts an excellent electron injection property and an excellent electron transport property when it is used as an electron injection layer of an organic EL device. The present invention relates to an organic thin film, which is a single film containing a first material which is a hexahydropyrimidopyrimidine compound having a structure of the following formula (1) and a second material which transports electrons, or a laminate film including a film containing the first material and a film containing the second material,
wherein R1 is an optionally substituted aromatic hydrocarbon group, an optionally substituted aromatic heterocyclic group, an optionally substituted arylalkylene group, an optionally substituted divalent to tetravalent acyclic or cyclic hydrocarbon group, a group of a combination of two or more of these groups, or a group of a combination of one or more of these groups and a nitrogen atom; and n is an integer of 1 to 4.
                            本发明旨在提供一种有机薄膜,当其用作有机电致发光器件的电子注入层时,可赋予其优异的电子注入性能和优异的电子传输性能。本发明涉及一种有机薄膜,它是含有第一种材料(具有下式(1)结构的六氢
嘧啶并
嘧啶化合物)和第二种传输电子的材料的单层薄膜,或者是包括含有第一种材料的薄膜和含有第二种材料的薄膜的层压薄膜、
其中 R1 是任选取代的
芳香烃基团、任选取代的芳香杂环基团、任选取代的芳烷基基团、任选取代的二价至四价无环或环状烃基团、由两个或多个上述基团组合而成的基团、或由一个或多个上述基团和氮原子组合而成的基团;n 是 1 至 4 的整数。