Electrical and optical properties of semiconducting metal complexes


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

MATERIALS LETTERS, cilt.57, ss.3330-3340, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0167-577x(03)00068-5
  • Dergi Adı: MATERIALS LETTERS
  • Sayfa Sayıları: ss.3330-3340

Özet

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.