Title :
Dielectric properties and physical structure of a complex organic semiconductor
Author :
Dantras, E. ; Dandurand, J. ; Lacabanne, C. ; Seguy, I. ; Destruel, P. ; Bock, U. ; Fouet, S.
Author_Institution :
Lab. de Phys. des Polymeres, Univ. Paul Sabatier, Toulouse, France
Abstract :
Due to its molecular configuration, pyrene 1,3,6,8-tetracarboxylic 2-racethyl hexyl ester exhibits a mesomorphic phase at room temperature. The evolution of the molecular organisation with the temperature has been determined by differential scanning calorimetry (DSC). Conductivity of this columnar liquid crystal is explored along a broad temperature range. As this liquid crystal is used as film electronic devices, the thermostimulated microtechnique (TSC) has been improved and developed. Behaviour laws and molecular mobility involved in this highly ordered columnar liquid crystal are studied. The correlation with thermal studies allows us to understand dielectric properties as a function of physical state.
Keywords :
dielectric properties; differential scanning calorimetry; electrical conductivity; liquid crystals; liquid semiconductors; molecular configurations; organic semiconductors; semiconductor thin films; thermally stimulated currents; 20 degC; columnar liquid crystal; conductivity; dielectric properties; differential scanning calorimetry; film electronic devices; mesomorphic phase; molecular configuration; molecular mobility; molecular organisation evolution; organic semiconductor; physical structure; pyrene 1,3,6,8-tetracarboxylic 2-racethyl hexyl ester; room temperature; thermostimulated microtechnique; Calorimetry; Crystallization; Dielectric thin films; Heating; Liquid crystal devices; Liquid crystals; Measurement standards; Organic semiconductors; Photovoltaic cells; Temperature distribution;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350294
