The Effect of Different Liquid Crystal Compounds on Conduction Mechanism of 4-Cyano-4(')-n-heptybiphenyl (7CB) by Using I-V Characteristics


Canli N. , Ozdemir Z. , Eran B. B.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, vol.608, no.1, pp.47-54, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 608 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1080/15421406.2014.949595
  • Title of Journal : MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Page Numbers: pp.47-54

Abstract

We have investigated the current-voltage characteristics of 7CB (4-cyano-4 '-n-heptybiphenyl), 7CB:LC1 (5-(10-undecenyloxy)-2-[[[4-hexylphenyl]imino]methl]phenol) and 7CB:LC2 (5-(10-undecenyloxy)-2-[[[4-hexyloxyphenyl]imino]methl]phenol) by means of negative differential resistance and conductivity mechanism. According to differential resistance calculations, only 7CB and 7CB:LC1 exhibit N-shaped voltage-controlled NDR effect. The electrical conductivity mechanism of the related LCs has been investigated by natural logarithmic current-voltage curves. The nonlinear property of I-V characteristics has been explained by space charge limited conduction mechanism for 7CB:LC2.