An OLED device including a cathode, an anode, and having therebetween a light-emitting layer and further comprising a first layer between the light-emitting layer and the cathode containing a cyclobutene compound comprising a cyclobutene nucleus substituted in the 1-position with a five- or six-membered heteroaromatic ring group containing at least one trivalent nitrogen atom; substituted in the 2-position with an aromatic ring group; and substituted with a first methylene group in the 3-position and a second methylene group in the 4-position, provided said first and second methylene groups are further disubstituted in the 1′,1′-positions and the 1″,1″-positions with independently selected aromatic groups.
一种OLED器件,包括阴极、阳极,并在其之间具有发光层,还包括在发光层和阴极之间的第一层,该第一层包含一个
环丁烷化合物,其
环丁烷核在1-位置上被含有至少一个三价氮原子的五元或六元杂芳基环取代,在2-位置上被芳香环基取代,在3-位置上被第一亚甲基基取代,在4-位置上被第二亚甲基基取代,条件是所述第一和第二亚甲基基在1',1'-位置和1'',1''-位置上进一步被独立选择的芳香基取代。