Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films

Thin films of Nickel Phthalocyanine (NiPc) are fabricated at a base pressure of 10-5 m.bar using Hind-Hivac thermal evaporation plant. The films are deposited on to glass substrates at various temperatures 318, 363, 408 and 458K. The optical absorption spectra of these thin films are measured. Pres...

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Main Authors: Benny Joseph, C. S. Menon
Format: Article
Language:English
Published: Hindawi Limited 2007-01-01
Series:E-Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2007/643834
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spelling doaj-7bbd28a3ddf740119ab63b454173f0b02020-11-24T23:59:33ZengHindawi LimitedE-Journal of Chemistry0973-49452090-98102007-01-014225526410.1155/2007/643834Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin FilmsBenny Joseph0C. S. Menon1School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, 686 560, Kerala State, indiaSchool of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, 686 560, Kerala State, indiaThin films of Nickel Phthalocyanine (NiPc) are fabricated at a base pressure of 10-5 m.bar using Hind-Hivac thermal evaporation plant. The films are deposited on to glass substrates at various temperatures 318, 363, 408 and 458K. The optical absorption spectra of these thin films are measured. Present studies reveal that the optical band gap energies of NiPc thin films are highly dependent on the substrate temperatures. The structure and surface morphology of the films deposited on glass substrates of temperatures 303, 363 and 458K are studied using X-ray diffractograms and Scanning Electron Micrographs (SEM), show that there is a change in the crystallinity and surface morphology due to change in the substrate temperatures. Full width at half maximum (FWHM) intensity of the diffraction peaks is also found reduced with increasing substrate temperatures. Scanning electron micrographs show that these crystals are fiber like at high substrate temperatures. The optical band gap increases with increase in substrate temperature and is then reduced with fiber-like grains at 408K. The band gap increases again at 458K with full of fiber like grains. Trap energy levels are also observed for these films.http://dx.doi.org/10.1155/2007/643834
collection DOAJ
language English
format Article
sources DOAJ
author Benny Joseph
C. S. Menon
spellingShingle Benny Joseph
C. S. Menon
Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
E-Journal of Chemistry
author_facet Benny Joseph
C. S. Menon
author_sort Benny Joseph
title Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
title_short Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
title_full Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
title_fullStr Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
title_full_unstemmed Studies on the Optical Properties and Surface Morphology of Nickel Phthalocyanine Thin Films
title_sort studies on the optical properties and surface morphology of nickel phthalocyanine thin films
publisher Hindawi Limited
series E-Journal of Chemistry
issn 0973-4945
2090-9810
publishDate 2007-01-01
description Thin films of Nickel Phthalocyanine (NiPc) are fabricated at a base pressure of 10-5 m.bar using Hind-Hivac thermal evaporation plant. The films are deposited on to glass substrates at various temperatures 318, 363, 408 and 458K. The optical absorption spectra of these thin films are measured. Present studies reveal that the optical band gap energies of NiPc thin films are highly dependent on the substrate temperatures. The structure and surface morphology of the films deposited on glass substrates of temperatures 303, 363 and 458K are studied using X-ray diffractograms and Scanning Electron Micrographs (SEM), show that there is a change in the crystallinity and surface morphology due to change in the substrate temperatures. Full width at half maximum (FWHM) intensity of the diffraction peaks is also found reduced with increasing substrate temperatures. Scanning electron micrographs show that these crystals are fiber like at high substrate temperatures. The optical band gap increases with increase in substrate temperature and is then reduced with fiber-like grains at 408K. The band gap increases again at 458K with full of fiber like grains. Trap energy levels are also observed for these films.
url http://dx.doi.org/10.1155/2007/643834
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