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, cilt.608, sa.1, ss.47-54, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 608 Sayı: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/15421406.2014.949595
  • Dergi Adı: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.47-54
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

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.