Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films

Study on the optical properties of ZnS, SnS and Se thin films in polycrystalline and amorphous structure was carried out at room temperature. Double beam UV spectrophotometer was used to obtain the transmissions curve. The measurement of transmission for each sample was conducted in the range of...

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Main Author:	Abdelrahman, Abubaker Elshiekh
Format:	Thesis
Language:	English English
Published:	2000
Subjects:	Thin films - Optical properties
Online Access:	http://psasir.upm.edu.my/id/eprint/9188/1/FSAS_2000_43_IR.pdf
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spelling	my-upm-ir.91882024-02-02T03:36:30Z Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films 2000-12 Abdelrahman, Abubaker Elshiekh Study on the optical properties of ZnS, SnS and Se thin films in polycrystalline and amorphous structure was carried out at room temperature. Double beam UV spectrophotometer was used to obtain the transmissions curve. The measurement of transmission for each sample was conducted in the range of 300 to 1100 nm, and the structures of samples were analyzed using X-ray diffraction spectrometer. Swanepoel (1983) method had been used in this study to determine the optical properties of the ZnS, SnS and Se thin films. Data from theoretical calculation was also used to cross-.check the validity of the optical data of the samples. The results show that the refractive index of the samples decreases as wavelength increases. The energy band gaps of the samples are in good agreement with the data reported in the literature previously. The results also show that the refractive index of the samples is thickness dependent. However, the energy band gaps for all the samples were found to be independent of film thickness in the range of 370 up to 742 run. While the energy band gaps of the Se thin films decreases with increasing film thickness. Three procedures of measurement were investigated for the samples. First, measurements were done immediately on the samples after they were deposited. Second, the measurement of the samples was done after they were exposed to the air. Third, the effect of annealing at different times in addition to different temperatures in ranging from (40 - 120) °C in ambient atmospheric pressure was studied. The results indicated that, the refractive index decreased with increasing the wavelength in all cases. Other results in the present study indicate that the aging have more significant effect on the refractive index, plasma energy and energy band gap of the ZnS and Se samples. Furthermore the refractive index and the energy band gap of the a-ZnS were not affected with the annealing time, while the energy band gap of the SnS was affected with annealing temperature. Thin films - Optical properties 2000-12 Thesis http://psasir.upm.edu.my/id/eprint/9188/ http://psasir.upm.edu.my/id/eprint/9188/1/FSAS_2000_43_IR.pdf text en public masters Universiti Putra Malaysia Thin films - Optical properties Faculty of Science and Environmental Studies Mat Yunus, W. Mahmood English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Mat Yunus, W. Mahmood
topic	Thin films - Optical properties
spellingShingle	Thin films - Optical properties Abdelrahman, Abubaker Elshiekh Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
description	Study on the optical properties of ZnS, SnS and Se thin films in polycrystalline and amorphous structure was carried out at room temperature. Double beam UV spectrophotometer was used to obtain the transmissions curve. The measurement of transmission for each sample was conducted in the range of 300 to 1100 nm, and the structures of samples were analyzed using X-ray diffraction spectrometer. Swanepoel (1983) method had been used in this study to determine the optical properties of the ZnS, SnS and Se thin films. Data from theoretical calculation was also used to cross-.check the validity of the optical data of the samples. The results show that the refractive index of the samples decreases as wavelength increases. The energy band gaps of the samples are in good agreement with the data reported in the literature previously. The results also show that the refractive index of the samples is thickness dependent. However, the energy band gaps for all the samples were found to be independent of film thickness in the range of 370 up to 742 run. While the energy band gaps of the Se thin films decreases with increasing film thickness. Three procedures of measurement were investigated for the samples. First, measurements were done immediately on the samples after they were deposited. Second, the measurement of the samples was done after they were exposed to the air. Third, the effect of annealing at different times in addition to different temperatures in ranging from (40 - 120) °C in ambient atmospheric pressure was studied. The results indicated that, the refractive index decreased with increasing the wavelength in all cases. Other results in the present study indicate that the aging have more significant effect on the refractive index, plasma energy and energy band gap of the ZnS and Se samples. Furthermore the refractive index and the energy band gap of the a-ZnS were not affected with the annealing time, while the energy band gap of the SnS was affected with annealing temperature.
format	Thesis
qualification_level	Master's degree
author	Abdelrahman, Abubaker Elshiekh
author_facet	Abdelrahman, Abubaker Elshiekh
author_sort	Abdelrahman, Abubaker Elshiekh
title	Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
title_short	Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
title_full	Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
title_fullStr	Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
title_full_unstemmed	Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films
title_sort	effect of aging and heat treatment on the optical properties of zns, sns and se thin films
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Science and Environmental Studies
publishDate	2000
url	http://psasir.upm.edu.my/id/eprint/9188/1/FSAS_2000_43_IR.pdf
_version_	1794018797744553984

Effect of aging and heat treatment on the optical properties of ZnS, SnS and Se thin films

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