Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films
Undoped and Cu doped ZnO films of two different molarities deposited by spray pyrolysis using zinc nitrate and cupric chloride as precursors show polycrystalline nature and hexagonal wurtzite structure of ZnO. The crystallite size varies between 10 and 21 nm. Doping increases the transmittance of th...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2015/172864 |
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| author | R. K. Shukla Anchal Srivastava Nishant Kumar Akhilesh Pandey Mamta Pandey |
| author_facet | R. K. Shukla Anchal Srivastava Nishant Kumar Akhilesh Pandey Mamta Pandey |
| author_sort | R. K. Shukla |
| collection | DOAJ |
| description | Undoped and Cu doped ZnO films of two different molarities deposited by spray pyrolysis using zinc nitrate and cupric chloride as precursors show polycrystalline nature and hexagonal wurtzite structure of ZnO. The crystallite size varies between 10 and 21 nm. Doping increases the transmittance of the films whereas the optical band gap of ZnO is reduced from 3.28 to 3.18 eV. With increment in doping the surface morphology changes from irregular shaped grains to netted structure with holes and then to net making needle-like structures which lends gas sensing characteristics to the films. Undoped ZnO shows maximum sensitivity at 400°C for higher concentration of CO2. The sensitivity of Cu doped sample is maximum at 200°C for all CO2 concentrations from 500 to 4000 ppm. |
| format | Article |
| id | doaj-art-d830806d06d3422c96ecb6b3ada466e3 |
| institution | DOAJ |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-d830806d06d3422c96ecb6b3ada466e32025-08-20T03:23:51ZengWileyJournal of Nanotechnology1687-95031687-95112015-01-01201510.1155/2015/172864172864Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin FilmsR. K. Shukla0Anchal Srivastava1Nishant Kumar2Akhilesh Pandey3Mamta Pandey4Department of Physics, University of Lucknow, Lucknow 226007, IndiaDepartment of Physics, University of Lucknow, Lucknow 226007, IndiaDepartment of Physics, University of Lucknow, Lucknow 226007, IndiaSolid State Physics Laboratory (SSPL), DRDO, New Delhi 110054, IndiaDepartment of Physics, University of Lucknow, Lucknow 226007, IndiaUndoped and Cu doped ZnO films of two different molarities deposited by spray pyrolysis using zinc nitrate and cupric chloride as precursors show polycrystalline nature and hexagonal wurtzite structure of ZnO. The crystallite size varies between 10 and 21 nm. Doping increases the transmittance of the films whereas the optical band gap of ZnO is reduced from 3.28 to 3.18 eV. With increment in doping the surface morphology changes from irregular shaped grains to netted structure with holes and then to net making needle-like structures which lends gas sensing characteristics to the films. Undoped ZnO shows maximum sensitivity at 400°C for higher concentration of CO2. The sensitivity of Cu doped sample is maximum at 200°C for all CO2 concentrations from 500 to 4000 ppm.http://dx.doi.org/10.1155/2015/172864 |
| spellingShingle | R. K. Shukla Anchal Srivastava Nishant Kumar Akhilesh Pandey Mamta Pandey Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films Journal of Nanotechnology |
| title | Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films |
| title_full | Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films |
| title_fullStr | Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films |
| title_full_unstemmed | Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films |
| title_short | Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films |
| title_sort | optical and sensing properties of cu doped zno nanocrystalline thin films |
| url | http://dx.doi.org/10.1155/2015/172864 |
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