An electrophotographic element comprises: an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the reaction product in an aqueous medium of a mixture comprising a silsesquioxane polymer and a hole transport compound that comprises a tertiary arylamine containing at least one alcoholic or one phenolic hydroxy substituent.
电致发光元件包括:导电层、覆盖在导电层上的电荷产生层和覆盖在导电层上的电荷传输层。电荷传输层可以是覆盖在电荷产生层上的涂层,它包括
硅倍半氧烷聚合物和孔传输化合物混合物在
水介质中的反应产物,后者包括含有至少一个醇羟基或一个
酚羟基取代基的叔芳基胺。