Photoluminescence and EPR Studies of ZnS Nanoparticles Co-Doped With Mn and Te

Author(s) A. Divya1, B.K. Reddy1 , S. Sambasivam2, P. Sreedhara Reddy1

1 Department of Physics, S.V. University, Tirupati-517502, A.P., India

2 Department of Physics, Pukyong National University, Busan, South Korea

Issue Volume 3, Year 2011, Number 1, Part 4
Dates Received 04 February 2011, published online 17 October 2011
Citation A. Divya, B.K. Reddy, S. Sambasivam, P. Sreedhara Reddy, J. Nano- Electron. Phys. 3 No1, 639 (2011)
PACS Number(s) 61.46.Df
Key words Nanoparticles (61) , ZnS (12) , Transmission electron microscopy (TEM), Photoluminescence (PL), Electron paramagnetic resonance (EPR).
ZnS nanoparticles Co-doped with Mn and Te (x = 0.05 and 0.10) have been synthesized for the first time by chemical co-precipitation method, thiophenol is used to passivate the surface of the particles. The as-prepared samples were amorphous in nature. Nanocrystallinity was induced after calcining the samples at 300oC/2hrs. The obtained nanoparticles were subjected to X-ray diffraction (XRD), Energy Dispersive Analysis of X-rays (EDAX), Transmission Electron Microscopy (TEM), Photoluminescence (PL) and Electron Paramagnetic Resonance (EPR) studies. All the samples exhibited cubic structure and the particle size was found to be 3-5 nm. EDAX revealed that the compositions did not deviate much from the target compositions. The photoluminescence studies showed emission in the red region and the emission wavelength is varied with composition. The Electron Paramagnetic Resonance (EPR) spectra showed paramagnetic nature of the samples at room temperature. EPR and PL results were quite consistent with each other.