Size dependent structural, optical and morphological properties of ZnS:Cu thin films

ZnS:Cu thin films have been deposited on glass substrate by a simple neutral pH solution synthesis route and chemical bath deposition technique. The copper concentration was varied between 0 and 0.1 M%. The X-ray diffraction and scanning electron microscope studies show the average size of the nanop...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2012-03, Vol.23 (3), p.811-815
Main Authors: Muthu Kumaran, S., Ashok Kumar, M.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
DEPOSITION
Energy gap
Exact sciences and technology
Film thickness
Glasses (including metallic glasses)
Growth from solutions
Materials Science
Methods of crystal growth
physics of crystal growth
Nanoparticles
Optical and Electronic Materials
Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity
OPTICAL PROPERTIES
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Particle size
PARTICLE SIZE AND SHAPE
PARTICLES
Physics
PROPERTIES
SCANNING ELECTRON MICROSCOPY
Specific materials
THIN FILMS
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Description
Summary:ZnS:Cu thin films have been deposited on glass substrate by a simple neutral pH solution synthesis route and chemical bath deposition technique. The copper concentration was varied between 0 and 0.1 M%. The X-ray diffraction and scanning electron microscope studies show the average size of the nanoparticles are below 4 nm (Bohr diameter). The effect of film thickness on the optical and structural properties has been studied. The optical absorption studies show the band gap energy of ZnS:Cu films decreases from 3.68 to 3.43 eV as thickness varied from 318.3 to 334.1 nm. The structural estimation shows the variation in particle size from 2.67 to 3.14 nm with thickness. The insignificant change in band gap may be due to the increase in particle size and quantum size effect.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-011-0497-4