Transient Current Study of Ultraviolet-Light-Soaked States in n-Pentyl-p-n-Cyanobiphenyl

Ultraviolet (UV)-light-soaked states in n-pentyl-p-n-cyanobiphenyl (5CB) have been investigated with transient current techniques. No change in the drift mobility of ions is detected, while the density of ions is increased after UV-light soaking because of the photochemical decomposition of 5CB. The origin of the impurity ions in 5CB is briefly discussed.