Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions
Nanocrystalline ZnxCd1−xS solid solutions were prepared in a microwave-assisted hydrothermal process with gradient distribution of components (x = 0.1, 0.3, 0.5, 0.7, and 0.9). The growth of the cubic-structured quantum dots was observed for all component stoichiometries with the crystallite size be...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/52186/1/Structural%20and%20optical%20properties%20of%20PVP-capped%20nanocrystalline%20ZnxCd1%E2%88%92xS%20solid%20solutions.pdf |
| _version_ | 1825930676245889024 |
|---|---|
| author | Vernosfaderani, Mina Askari Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Dorostkar, Mahdi |
| author_facet | Vernosfaderani, Mina Askari Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Dorostkar, Mahdi |
| author_sort | Vernosfaderani, Mina Askari |
| collection | UPM |
| description | Nanocrystalline ZnxCd1−xS solid solutions were prepared in a microwave-assisted hydrothermal process with gradient distribution of components (x = 0.1, 0.3, 0.5, 0.7, and 0.9). The growth of the cubic-structured quantum dots was observed for all component stoichiometries with the crystallite size between 4.5 and 5.7 nm. The obvious peak shifts have been found in the XRD patterns and the lattice parameters showed linear variation with x increasing. The evolution of the optical properties of obtained solid solutions including absorption and photoemission was also monitored in detail. The solid solutions show a considerable shift in the nanoparticle optical absorption edge from 482 to 343 nm with the increasing of Zn fraction. The band gaps of the solid solutions were estimated to be between 2.94 and 3.40 eV and the position of conduction band was shifted toward more negative potential with x increasing. The photoluminescence spectra showed a broad blue-green emission spreading up to 600 nm with emergence of three dominant peaks belong to sulfur, zinc, and cadmium vacancies. |
| first_indexed | 2024-03-06T09:15:10Z |
| format | Article |
| id | upm.eprints-52186 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:15:10Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-521862017-06-05T05:03:37Z http://psasir.upm.edu.my/id/eprint/52186/ Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions Vernosfaderani, Mina Askari Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Dorostkar, Mahdi Nanocrystalline ZnxCd1−xS solid solutions were prepared in a microwave-assisted hydrothermal process with gradient distribution of components (x = 0.1, 0.3, 0.5, 0.7, and 0.9). The growth of the cubic-structured quantum dots was observed for all component stoichiometries with the crystallite size between 4.5 and 5.7 nm. The obvious peak shifts have been found in the XRD patterns and the lattice parameters showed linear variation with x increasing. The evolution of the optical properties of obtained solid solutions including absorption and photoemission was also monitored in detail. The solid solutions show a considerable shift in the nanoparticle optical absorption edge from 482 to 343 nm with the increasing of Zn fraction. The band gaps of the solid solutions were estimated to be between 2.94 and 3.40 eV and the position of conduction band was shifted toward more negative potential with x increasing. The photoluminescence spectra showed a broad blue-green emission spreading up to 600 nm with emergence of three dominant peaks belong to sulfur, zinc, and cadmium vacancies. Elsevier 2015 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52186/1/Structural%20and%20optical%20properties%20of%20PVP-capped%20nanocrystalline%20ZnxCd1%E2%88%92xS%20solid%20solutions.pdf Vernosfaderani, Mina Askari and Soltani, Nayereh and Saion, Elias and Mat Yunus, Wan Mahmood and Haghiri, Maryam Erfani and Dorostkar, Mahdi (2015) Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions. Superlattices and Microstructures, 81. pp. 193-201. ISSN 0749-6036; ESSN: 1096-3677 http://www.sciencedirect.com/science/article/pii/S0749603615000324 10.1016/j.spmi.2015.01.011 |
| spellingShingle | Vernosfaderani, Mina Askari Soltani, Nayereh Saion, Elias Mat Yunus, Wan Mahmood Haghiri, Maryam Erfani Dorostkar, Mahdi Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title | Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title_full | Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title_fullStr | Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title_full_unstemmed | Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title_short | Structural and optical properties of PVP-capped nanocrystalline ZnxCd1−xS solid solutions |
| title_sort | structural and optical properties of pvp capped nanocrystalline znxcd1 xs solid solutions |
| url | http://psasir.upm.edu.my/id/eprint/52186/1/Structural%20and%20optical%20properties%20of%20PVP-capped%20nanocrystalline%20ZnxCd1%E2%88%92xS%20solid%20solutions.pdf |
| work_keys_str_mv | AT vernosfaderaniminaaskari structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions AT soltaninayereh structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions AT saionelias structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions AT matyunuswanmahmood structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions AT haghirimaryamerfani structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions AT dorostkarmahdi structuralandopticalpropertiesofpvpcappednanocrystallineznxcd1xssolidsolutions |