Influence of anion substitution on electrical conductivity of composites based on liquid crystal with Cu₆PS₅X (X = I, Br) nanoparticles

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2019
• ISSN: 1560-8034
• Main Authors: Studenyak, I.P., Kovalchuk, O.V., Poberezhets, S.I., Timko, M., Kopcansky, P.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2019
• Subjects: Semiconductor Physics
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/215594
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Influence of anion substitution on electrical conductivity of composites based on liquid crystal with Cu₆PS₅X (X = I, Br) nanoparticles / I.P. Studenyak, O.V. Kovalchuk, S.I. Poberezhets, M. Timko, P. Kopcansky // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 4. — С. 387-390. — Бібліогр.: 6 назв. — англ.

Dielectric properties of composites based on planar-oriented 6СВ liquid crystal with Cu₆PS₅X (X = I, Br) nanoparticles at 293 K in the frequency range from 6 to 10⁶ Hz have been studied. The concentration of nanoparticles varied from 0 to 0.1 wt.%. It has been shown that Cu₆PS₅Вr nanoparticles significantly less influence the conductivity of 6CB than the Cu₆PS₅I nanoparticles. Moreover, at the concentrations 0.01 to 0.05 wt.% of Cu₆PS₅Br nanoparticles, the conductivity of the LC decreases. It has been assumed that the nonmonotonic dependence of 6CB conductivity on the concentration of Cu₆PS₅Br superionic nanoparticles is caused by two competing mechanisms: an increase in conductivity due to the introduction of conductive impurities with nanoparticles and a decrease in conductivity caused by adsorption of impurities on the surface of nanoparticles.