Title :
Doping effect of Mn on structural optical magnetic and electrical properties of CdS nanoparticles
Author_Institution :
Dept. of Phys., N.B.K.R. Instn., Vidyanagar, India
Abstract :
Nanocrystalline CdS particles were prepared via an in-situ doping of manganese in CdS nanoparticles through chemical co-precipitation method using thiophenol as capping agent. The maximum content of the manganese in the CdS is around 10 at.%, approaching the maximum thermal equilibrium limit of Mn solubility in CdS at the growth temperature in this process. Compositional analysis disclosed that the Mn was doped into the CdS lattice structure. HRTEM and XRD studies revealed structural transformation with Mn doping and the size of the particles was in the range 15-50 nm. Optical study showed that the band gap energy of CdS has been blue shifted and varied upon Mn doping. Surface states within the band gap were confirmed by photoluminescence. Magnetic property measurements showed that the CdS and Mn doped CdS exhibited super paramagnetism with Lande `g´ factor equal to two (g=2). Impedance study suggested the insulating nature of the CdS and found to vary with Mn doping. Besides, the Nyquist plots revealed a grain boundary effect in the samples.
Keywords :
II-VI semiconductors; X-ray chemical analysis; X-ray diffraction; cadmium compounds; electrical conductivity; energy gap; g-factor; magnetic particles; magnetisation; manganese; nanofabrication; nanomagnetics; nanoparticles; particle size; photoluminescence; precipitation (physical chemistry); semiconductor doping; semiconductor growth; solid-state phase transformations; solubility; spectral line shift; superparamagnetism; surface states; transmission electron microscopy; ultraviolet spectra; visible spectra; wide band gap semiconductors; CdS:Mn; HRTEM; Lande g factor; Nyquist plots; XRD; band gap energy; blue shift; capping agent; chemical coprecipitation method; compositional analysis; electrical properties; grain boundary; growth temperature; insulating nature; lattice structure; magnetic properties; manganese doping effect; nanocrystalline particles; nanoparticles; optical properties; particle size; photoluminescence; solubility; structural properties; structural transformation; superparamagnetism; surface states; thermal equilibrium limit; thiophenol; X-ray scattering;
Conference_Titel :
Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET), 2013 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4799-1377-0
DOI :
10.1109/ICANMEET.2013.6609255
