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Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy

Photopyroelectric (PPE) spectroscopy is a useful tool for examining optical properties in semiconductor materials. The ceramic (ZnO - xTiO₂) was sintered at 1270⁰C for 1 and 3 hours to investigate the variations of energy band-gap with respect to mol % of dopant TiO₂. The X-ray diffractrometry shows...

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Main Authors: Zakaria, Azmi, Rizwan, Zahid, Mohd Ghazali, Mohd Sabri, Shaari, Abdul Halim, Mat Yunus, Wan Mahmood, Hashim, Mansor
Format: Article
Language:English
Published: Malaysian Solid State Science and Technology Society 2008
Online Access:http://psasir.upm.edu.my/id/eprint/13963/1/Determination%20of%20the%20energy%20band.pdf
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spelling oai:psasir.upm.edu.my:13963 http://psasir.upm.edu.my/id/eprint/13963/ Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri Shaari, Abdul Halim Mat Yunus, Wan Mahmood Hashim, Mansor Photopyroelectric (PPE) spectroscopy is a useful tool for examining optical properties in semiconductor materials. The ceramic (ZnO - xTiO₂) was sintered at 1270⁰C for 1 and 3 hours to investigate the variations of energy band-gap with respect to mol % of dopant TiO₂. The X-ray diffractrometry shows that the crystal structure of ZnO doped at low level remains to be of hexagonal type but has developed second phase, Zn₂TiO₄, at high level. Microstructure and compositional analysis of the selected areas are analyzed using SEM and EDAX. The maximum grain size obtained were 26.8, 52.4 µm at 0.4 mol % of TiO₂ for 1 and 3 hours sintering time, respectively. The band-gap determined from the photopyroelectric spectrum has the value of 2.82 ± 0.01 eV for samples sintered for 1 and 3 hours at the doping level of 0.4 mol % of TiO₂ and decreases with the increase of TiO₂. Malaysian Solid State Science and Technology Society 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/13963/1/Determination%20of%20the%20energy%20band.pdf Zakaria, Azmi and Rizwan, Zahid and Mohd Ghazali, Mohd Sabri and Shaari, Abdul Halim and Mat Yunus, Wan Mahmood and Hashim, Mansor (2008) Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy. Solid State Science and Technology, 16 (1). pp. 85-92. ISSN 0128-7389 http://journal.masshp.net/volume-16-no-1-2008/
institution UPM IR
collection UPM IR
language English
description Photopyroelectric (PPE) spectroscopy is a useful tool for examining optical properties in semiconductor materials. The ceramic (ZnO - xTiO₂) was sintered at 1270⁰C for 1 and 3 hours to investigate the variations of energy band-gap with respect to mol % of dopant TiO₂. The X-ray diffractrometry shows that the crystal structure of ZnO doped at low level remains to be of hexagonal type but has developed second phase, Zn₂TiO₄, at high level. Microstructure and compositional analysis of the selected areas are analyzed using SEM and EDAX. The maximum grain size obtained were 26.8, 52.4 µm at 0.4 mol % of TiO₂ for 1 and 3 hours sintering time, respectively. The band-gap determined from the photopyroelectric spectrum has the value of 2.82 ± 0.01 eV for samples sintered for 1 and 3 hours at the doping level of 0.4 mol % of TiO₂ and decreases with the increase of TiO₂.
format Article
author Zakaria, Azmi
Rizwan, Zahid
Mohd Ghazali, Mohd Sabri
Shaari, Abdul Halim
Mat Yunus, Wan Mahmood
Hashim, Mansor
spellingShingle Zakaria, Azmi
Rizwan, Zahid
Mohd Ghazali, Mohd Sabri
Shaari, Abdul Halim
Mat Yunus, Wan Mahmood
Hashim, Mansor
Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
author_facet Zakaria, Azmi
Rizwan, Zahid
Mohd Ghazali, Mohd Sabri
Shaari, Abdul Halim
Mat Yunus, Wan Mahmood
Hashim, Mansor
author_sort Zakaria, Azmi
title Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
title_short Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
title_full Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
title_fullStr Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
title_full_unstemmed Determination of the energy band-gap of the ceramic ZnO -xTiO₂ using photopyroelectric spectroscopy
title_sort determination of the energy band-gap of the ceramic zno -xtio₂ using photopyroelectric spectroscopy
publisher Malaysian Solid State Science and Technology Society
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/13963/1/Determination%20of%20the%20energy%20band.pdf
_version_ 1819293765105352704
score 13.4562235

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