화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.263, 491-498, 1995
Photocurrent in a Nematic Liquid-Crystal
The photocurrent transients induced by illuminating a nematic Liquid crystal sample with a light pulse under de voltage application are investigated. Three types of current peaks are normally observed in the photoinduced current transient. The anomalous photoinduced current transient, which does not originate from the transport of electronic carriers in the bulk, occurs in a time range of microseconds or less only in the nematic phase. In the similar time range, other two types of current peaks appear both in the nematic and isotropic phases. The occurrence of these current peaks, which is likely to be due to the generation and recombination process of electron-hole pairs, and the ionic carrier transport in the bulk induced by the light excitation, are studied experimentally and discussed briefly.