Title :
Discotic liquid crystals as new class of fluid and their electrical and optical properties
Author :
Ohta, K. ; Ban, K. ; Nishizawa, K. ; Warman, J.M. ; van de Craats, A.M. ; Ozaki, M. ; Yoshino, K.
Author_Institution :
Dept. of Functional Polymer Sci., Shinshu Univ., Nagano, Japan
Abstract :
Unique structural, electrical and optical properties of discotic liquid crystals composed of disc-shaped molecules are discussed in comparison with those of calamitic liquid crystals composed of rod-like molecules, dielectric liquids and crystals. Electronic carriers are confirmed to contribute dominantly to the fast photoconductivity in discotic liquid crystals. Hole mobility in discotic phases has been found to be much larger than ionic mobility and to be dependent on the molecular structure, phases and disorder. Photo-carrier generation processes in discotic liquids are also studied and discussed in terms of the Onsager model
Keywords :
discotic liquid crystals; electrical conductivity; hole mobility; molecular orientation; photoconductivity; Onsager model; calamitic liquid crystals; disc-shaped molecules; discotic liquid crystals; electrical properties; electronic conduction; fast photoconductivity; hole mobility; molecular structure; optical properties; photocarrier generation processes; structural properties; Chemistry; Crystallization; Degradation; Dielectric liquids; Gravity; Heating; Liquid crystal polymers; Liquid crystals; Optical polymers; Plastics;
Conference_Titel :
Dielectric Liquids, 1999. (ICDL '99) Proceedings of the 1999 IEEE 13th International Conference on
Conference_Location :
Nara
Print_ISBN :
0-7803-4759-5
DOI :
10.1109/ICDL.1999.798997
