Original scientific paper
Photoluminescence in chemically deposited (Cd-Zn)S: CdCl2, Ho/Tb films prepared at room temperature
Shashi Bhushan
; S. O. S. in Physics, Pt. Ravishankar Shukla University, Raipur (C. G.) 492010, India
Sandhya Pillai
; M. P. Christian College of Engineering & Technology, Kailash Nagar, Bhilai (C.G.) 490026, India
Abstract
(Cd-Zn)S: CdCl2, Ho/Tb films were prepared by chemical deposition method on glass and Al substrates at room temperature (RT). The films were characterized by SEM, XRD, optical absorption/specular reflectance and photoluminescence (PL) emission spectral studies. SEM studies show the predominance of layered growth along with cluster of particles. XRD studies show crystalline nature of films with maximum intensity corresponding to the (111) plane of CdS cubic phase. Formation of solid solution of the mixed base is also observed. Diffraction lines corresponding to the impurities indicate the substitution of impurities in the lattice. Optical absorption spectra show absorption transitions within the energy levels of impurities. PL emission is most intense in films prepared on Al substrate, which may be due to greater thickness and better crystallinity of such films. PL emission due to transitions within Ho3+ as well as Tb3+ levels are observed.
Keywords
(Cd-Zn)S: CdCl2; Ho/Tb films; photoluminescence; deposition from liquid phases
Hrčak ID:
302726
URI
Publication date:
1.7.2009.
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