Electrical and optical properties of semiconducting metal complexes

Yakuphanoglu F., Dagdelen F., Aydogdu Y., Aydogdu A., Sekerci M.

MATERIALS LETTERS, vol.57, pp.3330-3340, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57
  • Publication Date: 2003
  • Doi Number: 10.1016/s0167-577x(03)00068-5
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3330-3340
  • Keywords: semiconducting metal complexes, crystal structure, electrical properties, optical properties, CONDUCTIVITY, DEPENDENCE
  • Gazi University Affiliated: No


The electrical conductivity, crystal structure, thermoelectric power, thermal conductivity and optical proper-ties of newly synthesized Cu(II), Ni(II) and Co(II) complexes have been investigated. The crystal structure of the complexes was carried out by powder X-ray diffraction (XRD). XRD show that samples are polycrystalline. The conduction mechanism was determined by activation energy process. The electronic parameters of the complexes were calculated, such as, activation energy E for dc conductivity and the density of localized states at the Fermi level N(E-F). The electrical conductivity measurements exhibit three-dimensional variable hopping conduction. The mechanism of the optical absorption follows the rule of direct transition. As a result, it is interpreted that the samples show semiconducting behavior as their conductivity increases with increasing temperature and they have direct optical band gap. (C) 2003 Elsevier Science B.V. All rights reserved.