"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Transport properties of CdS quantum dots by chemical precipitation method

D. NITHYAPRAKASH1,2,* , J. CHANDRASEKARAN1, B. PUNITHAVENI2

Affiliation

  1. PG and Research, Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore – 641 020, Tamilnadu, India
  2. Department of Physics, PPG Institute of Technology, Coimbatore-641 035, Tamilnadu, India

Abstract

In the present work, chemical precipitation method was employed for the preparation of CdS quantum dots. XRD studies reveal that CdS in single phase hexagonal structure. The particle size of CdS nanoparticles is obtained as 3 nm and also confirmed through HRTEM. Morphology and elemental mapping of the synthesized nanoparticles were studied by SEM and EDX analyses. The optical properties were studied by the ultraviolet – visible absorption spectrum and photoluminescence spectroscopy. The D.C electrical measurements of CdS nanoparticles pellet were performed using two probe techniques. The A.C conductivity and dielectric properties of pellet analyzed in the frequency range 100 kHz –1 MHz indicates that the dielectric constant and loss tangent increases with increase in temperature and decrease with increase in frequency in addition it supported the hopping mechanism..

Keywords

Cadmium sulfide; Quantum dots; Conductivity; Dielectric properties.

Submitted at: April 22, 2015
Accepted at: Sept. 9, 2015

Citation

D. NITHYAPRAKASH, J. CHANDRASEKARAN, B. PUNITHAVENI, Transport properties of CdS quantum dots by chemical precipitation method, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 9-10, pp. 1333-1338 (2015)