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Title: A study on dependence of the structural, optical and electrical properties of cadmium lead sulphide thin films on Cd/Pb ratio

Cadmium Lead Sulphide thin films with systematic variation in Cd/Pb ratio are prepared at 333K by CBD, adjusting the reagent-molarity, deposition time and pH. XRD exhibits crystalline-amorphous transition as Cd% exceeds Pb%. AFM shows agglomeration of crystallites of size ∼50±5 nm. EDAX assess the composition whereas XPS ascertains the ternary formation, with binding energies of Pb4f{sub 7/2} and 4f{sub 5/2}, Cd3d{sub 5/2} and 3d{sub 3/2} and S2p at 137.03, 141.606, 404.667, 412.133 and 160.218 eV respectively. The optical absorption spectra reveal the variance in the direct allowed band gaps, from 1.57eV to 2.42 eV as Cd/Pb ratio increases from 0.2 to 2.7, suggesting possibility of band gap engineering in the n-type films.
Authors:
; ;  [1] ;  [2] ; ;  [3]
  1. Thin film research Lab, U.C. College, Aluva, Kerala (India)
  2. Solid State Physics Laboratory, Cochin University of science and Technology, Cochin (India)
  3. UGC-DAE CSR, Khandwa Road, Indore, 452001, Madhya Pradesh (India)
Publication Date:
OSTI Identifier:
22308034
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1620; Journal Issue: 1; Conference: Optics 14: International conference on optics: Light and its interactions with matter, Calicut, Kerala (India), 19-21 Mar 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; AGGLOMERATION; ATOMIC FORCE MICROSCOPY; BINDING ENERGY; CADMIUM; CADMIUM COMPOUNDS; DEPOSITION; ELECTRICAL PROPERTIES; EV RANGE; LEAD; LEAD SULFIDES; PHASE TRANSFORMATIONS; THIN FILMS; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS; X-RAY PHOTOELECTRON SPECTROSCOPY