Novel Synthesis and Characterisation of CdS Nanoparticles

CdS nanocrystals were synthesised by a simple and novel solvothermal method using a domestic microwave oven. X-ray diffraction measurements indicate that, for all the three molecular ratios (1:1, 1:2 and 1:3) of reactants considered, the crystallite size is controlled to less than 14 nm. UV visible absorption spectral measurements show an optical bandgap within the range of 2.62-2.77 eV. Energy dispersive X-ray absorption spectral, DC and AC (with a fixed frequency of 1 kHz) electrical (at various temperatures ranging from 40-110 °C) measurements were also carried out on all the three samples prepared. The results obtained indicate that the electronic contribution plays a dominant role in charge transport process and polarisability.