Pyrylium- and thiopyrylium-sensitized low-persistence photoconductive compositions and elements

摘要

Protonic acid-free photoconductive compositions and elements comprising a photoconductor and, as a sensitizer, a 4-tertiaryaminobenzo b!pyrylium salt or a 4-tertiaryaminobenzo b!thiopyrylium salt. The resulting compositions and elements exhibit low persistent conductivity.