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Nanocrystalline properties of chemically deposited (Cd 0.95 ‐Pb 0.05 )S:CdCl 2 , Gd/Dy films
Author(s) -
Bhushan S.,
Shrivastava S.
Publication year - 2007
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200710951
Subject(s) - photoluminescence , nanocrystalline material , absorption spectroscopy , analytical chemistry (journal) , chemistry , spectral line , absorption (acoustics) , thiophenol , emission spectrum , materials science , crystallography , optics , organic chemistry , physics , optoelectronics , astronomy , composite material
Results of SEM and XRD studies, optical absorption spectra and photoluminescence emission spectra are presented for the films of (Cd 0.95 ‐Pb 0.05 )S:CdCl 2 , 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 CdCl 2 . 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. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)