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Crystal Research and Technology |
Cryst. Res. Technol. 42, 983 (2007) - Abstract -
Nanocrystalline properties of chemically deposited (Cd0.95-Pb0.05)S:CdCl2, Gd/Dy films
S. Bhushan and S. Shrivastava
S.O.S. in Physics, Pt. Ravishankar Shukla University, Raipur, 492010, (C.G.), India
| Keywords | photoluminescence, chemical deposition, nanocrystalline properties |
| PACS | 81.15.H |
| DOI | 10.1002/crat.200710951 |
Results of SEM and XRD studies, optical absorption spectra and photoluminescence emission spectra are presented for the films of (Cd0.95-Pb0.05)S:CdCl2, Gd/Dy prepared by chemical bath deposition technique and using thiophenol and methanol as capping agents. The deposition of films is based on precipitation followed by condensation on the substrates. SEM studies show existence of irregular distribution of particles alongwith presence of rod/tube type structure. The XRD studies show diffraction lines of CdS, PbS and CdCl2. Blue shift has been observed in absorption spectra showing quantum confinement. Particle sizes determined from XRD studies and absorption spectral studies are found to lie in the nano range. Photoluminescence emission spectra consist of emissions in blue and green-yellow regions. The observed emissions are related to the combination of defect levels and levels due to rare earths.
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