Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films
A nanocrystalline CdS thin film with 100 nm thickness has been prepared by thermal evaporation technique on glass substrate with substrate temperature of about 423 K. The films annealed under vacuum at different annealing temperature 473, 523 and 573 K. The X-ray diffraction studies show that CdS t...
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| Format: | Article |
| Language: | English |
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University of Baghdad
2012-10-01
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| Series: | Iraqi Journal of Physics |
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| Online Access: | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/756 |
| _version_ | 1797871298002550784 |
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| author | A. A. Al-Douri |
| author_facet | A. A. Al-Douri |
| author_sort | A. A. Al-Douri |
| collection | DOAJ |
| description |
A nanocrystalline CdS thin film with 100 nm thickness has been prepared by thermal evaporation technique on glass substrate with substrate temperature of about 423 K. The films annealed under vacuum at different annealing temperature 473, 523 and 573 K. The X-ray diffraction studies show that CdS thin films have a hexagonal polycrystalline structure with preferred orientation at (002) direction. Our investigation showed the grain size of thin films increased from 9.1 to 18.9 nm with increasing the annealing temperature. The optical measurements showed that CdS thin films have direct energy band gap, which decreases with increasing the annealing temperature within the range 3.2- 2.85 eV. The absorbance edge is blue shifted. The absorption coefficient for CdS films decreases with increasing the annealing temperature. The optical constant for the films such as refractive index, extinction coefficient, real and imaginary part of dielectric constant were observed to decrease with increasing the annealing temperature. The particle size calculated from absorption spectrum has increased from 4.74 to 8.38 nm with increasing the annealing temperature.
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| first_indexed | 2024-04-10T00:41:44Z |
| format | Article |
| id | doaj.art-57fdae7e55f849d18181dc7e00511970 |
| institution | Directory Open Access Journal |
| issn | 2070-4003 2664-5548 |
| language | English |
| last_indexed | 2024-04-10T00:41:44Z |
| publishDate | 2012-10-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Iraqi Journal of Physics |
| spelling | doaj.art-57fdae7e55f849d18181dc7e005119702023-03-14T05:44:59ZengUniversity of BaghdadIraqi Journal of Physics2070-40032664-55482012-10-011018Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin filmsA. A. Al-Douri0Applied Physics Department, Sciences College, University of Sharjah, UAE. A nanocrystalline CdS thin film with 100 nm thickness has been prepared by thermal evaporation technique on glass substrate with substrate temperature of about 423 K. The films annealed under vacuum at different annealing temperature 473, 523 and 573 K. The X-ray diffraction studies show that CdS thin films have a hexagonal polycrystalline structure with preferred orientation at (002) direction. Our investigation showed the grain size of thin films increased from 9.1 to 18.9 nm with increasing the annealing temperature. The optical measurements showed that CdS thin films have direct energy band gap, which decreases with increasing the annealing temperature within the range 3.2- 2.85 eV. The absorbance edge is blue shifted. The absorption coefficient for CdS films decreases with increasing the annealing temperature. The optical constant for the films such as refractive index, extinction coefficient, real and imaginary part of dielectric constant were observed to decrease with increasing the annealing temperature. The particle size calculated from absorption spectrum has increased from 4.74 to 8.38 nm with increasing the annealing temperature. https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/756CdS nanostructure; Structural properties; Optical Properties. |
| spellingShingle | A. A. Al-Douri Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films Iraqi Journal of Physics CdS nanostructure; Structural properties; Optical Properties. |
| title | Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films |
| title_full | Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films |
| title_fullStr | Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films |
| title_full_unstemmed | Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films |
| title_short | Annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline CdS thin films |
| title_sort | annealing temperature effect on the structural and optical properties of thermally deposited nanocrystalline cds thin films |
| topic | CdS nanostructure; Structural properties; Optical Properties. |
| url | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/756 |
| work_keys_str_mv | AT aaaldouri annealingtemperatureeffectonthestructuralandopticalpropertiesofthermallydepositednanocrystallinecdsthinfilms |