Semiconductor Physics, Quantum Electronics & Optoelectronics, 21 (4), P. 407-411 (2018).

Influence of nanoparticles of Сu 7 GeS 5 I superionic conductor on dielectric properties of planar-oriented nematic liquid crystal 6СВ
O.V. Kovalchuk1,2,3, M.M. Luchynets4, I.P. Studenyak4, M. Timko5, P. Kopcansky5, T.M. Kovalchuk6

1Institute of Physics, National Academy of Sciences of Ukraine, 46, prospect Nauky, 03680 Kyiv, Ukraine
2Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko str., 01011 Kyiv, Ukraine E-mail:
3National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37, prospect Peremohy, 03056 Kyiv, Ukraine
4Uzhhorod National University, Faculty of Physics, 3 Narodna Sq., 88000 Uzhhorod, Ukraine
5Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
6V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 41, prospect Nauky, 03680 Kyiv, Ukrainem

Abstract. The influence of Сu 7 GeS 5 I nanoparticles on the dielectric properties of planar- oriented liquid crystal 6CB has been investigated within the frequency range 6...10 6 Hz at the temperature 293 K. The concentration of nanoparticles varied within the range 0 to 0.1 wt.%. It has been shown that the Сu 7 GeS 5 I nanoparticles considerably less increase the conductivity of the liquid crystal (only by 1.3 times at their maximum concentration) than Сu 7 PS 6 ones, influence of which on the conductivity of the same liquid crystal we investigated earlier (24-fold increase in the conductivity at the same concentration of nanoparticles). It has been assumed that the main mechanism of conductivity changes when introducing Сu 7 GeS 5 I nanoparticles is the transfer of charge through nanoparticles. This mechanism of charge transfer is characterized by a rather strong dependence of the conductivity of the liquid crystal on the frequency and is experimentally observed especially at the maximum concentration of nanoparticles.

Keywords: superionic conductor, dielectric properties, planar-oriented nematic liquid crystal 6СВ.

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