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FIZIKA A 18 (2009) 3 , 141-152
 
PHOTOLUMINESCENCE IN CHEMICALLY DEPOSITED (Cd-Zn)S: CdCl2, Ho/Tb
FILMS PREPARED AT ROOM TEMPERATURE
SHASHI BHUSHANa and SANDHYA PILLAIb
aS. O. S. in Physics, Pt. Ravishankar Shukla University, Raipur
(C. G.) 492010, India
Present address: Shri Shankaracharya Engineering College, Junwani, Bhilai (C.G.)
490020, India
bM. P. Christian College of Engineering & Technology, Kailash Nagar,
Bhilai (C.G.) 490026, India
Received 27 November 2008; Revised manuscript received 25 July 2009
Accepted 21 October 2009 Online 27 November 2009
(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.
PACS numbers: 78.55.Et, 81.15.Lm
UDC 52-628, 535.37, 539.216
Keywords: (Cd-Zn)S: CdCl2, Ho/Tb films, photoluminescence,
deposition from liquid phases
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