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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Malaysian Solid State Science and Technology Society
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/13963/1/Determination%20of%20the%20energy%20band.pdf |
| _version_ | 1796968547500425216 |
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| author | Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri Shaari, Abdul Halim Mat Yunus, Wan Mahmood Hashim, Mansor |
| author_facet | Zakaria, Azmi Rizwan, Zahid Mohd Ghazali, Mohd Sabri Shaari, Abdul Halim Mat Yunus, Wan Mahmood Hashim, Mansor |
| author_sort | Zakaria, Azmi |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T07:29:55Z |
| format | Article |
| id | upm.eprints-13963 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T07:29:55Z |
| publishDate | 2008 |
| publisher | Malaysian Solid State Science and Technology Society |
| record_format | dspace |
| spelling | upm.eprints-139632015-11-26T03:36:06Z 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/ |
| 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/13963/1/Determination%20of%20the%20energy%20band.pdf |
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