AC IMPEDANCE SPECTROSCOPY STUDIES ON Ni DOPED CdS NANOPARTICLES PREPARED BY CHEMICAL CO-PRECIPITATION METHOD

作者：Rao B Srinivasa; Kumar B Rajesh^*; Reddy V Rajagopal; Rao T Subba; Chalapathi G Venkata

来源：Chalcogenide Letters, 2012, 9(12): 517-525.

• II-VI Semiconductors
• Ni doped CdS
• Impedance spectroscopy
• Dielectric properties

In the present work, pure CdS and Ni doped CdS nanoparticles have been synthesized by chemical co-precipitation method using thiophenol as a capping agent. The frequency dependent dielectric dispersion of pure CdS and Ni doped CdS nanoparticles are investigated at room temperature in the frequency range of 100 Hz - 1 MHz by impedance spectroscopy. The dielectric properties and ac conductivity (sigma(ac)) of the samples were measured as a function of frequency. The plots of Z' vs Z '' (Z' is the real part of impedance and Z '' is the imaginary part) for Ni doped CdS were recorded at room temperature over the frequency ranges. All samples have a semicircle arc originating at the origin point. This indicates that each composition can be described by one bulk resistance and one bulk capacitance both connected parallel. The centre below the real axis indicates the relaxation behaviour of the system.

• 出版日期2012-12