Low temperature DC conductivity, impedance spectroscopy and dielectric properties of Na doped Cd0.8Zn0.2S semiconductor compounds

作者：Yellaiah G^*; Shekharam T; Hadasa K; Nagabhushanam M

来源：Journal of Alloys and Compounds, 2014, 609: 192-200.

DOI：10.1016/j.jallcom.2014.04.124

• Co-precipitation technique
• DC conductivity
• Impedance spectroscopy
• Dielectric properties

Cd0.8Zn0.2S: Na-x (x = 0, 0.03, 0.1, 0.2 and 0.3 mol%) samples have been synthesized by controlled co-precipitation technique. The samples are characterized by X-ray diffraction (XRD). DC conductivity studies were performed in the temperature region 77-300 K by using two probe method. The DC conductivity plots show the Arrhenius behavior and they exhibited VRH conduction mechanism. From the impedance, and dielectric measurements parameters like bulk resistance (R-g), capacitance (C-g), relaxation time (tau) and dielectric constant (epsilon ') were calculated. The relaxation time of Na doped Cd0.8Zn0.2S samples were found to increase with the increase in temperature and varied non linearly with the increase in Na content. AC conductivity of the samples was found to increase with the increase in frequency whereas dielectric constant was observed to decrease with the increase in frequency. The results were explained based on the defects and their complexes.

• 出版日期2014-10-5