New hole-transporting dihydrazones

Synthesis and photoelectric properties of new glass-forming diphenylsulfone dihydrazones with the glass transition temperatures ranging from 22 to 123 °C are reported. The ionization potentials of the films of diphenylsulfone dihydrazones measured by the electron photoemission technique range from 5.00 to 5.33 eV. The hole-drift mobilities in the amorphous films of the diphenylsulfone dihydrazones bearing alkyl substituents doped in bisphenol Z polycarbonate (PC-Z) approach 10−5 cm2/(Vs) at high-applied electric fields as characterized by the time-of-flight method.