Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals
In this work we have synthesized CdS nanocrystals with thermochemical method. CdSO4 and Na2S2O3 were used as the precursors and thioglycolic acid (TGA) was used as capping agent molecule. The structure and optical property of the nanocrystals were characterized by means of XRD, TEM, UV-visible optic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2011-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.3562892 |
| _version_ | 1819058053597626368 |
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| author | M. Molaei E. Saievar Iranizad M. Marandi N. Taghavinia |
| author_facet | M. Molaei E. Saievar Iranizad M. Marandi N. Taghavinia |
| author_sort | M. Molaei |
| collection | DOAJ |
| description | In this work we have synthesized CdS nanocrystals with thermochemical method. CdSO4 and Na2S2O3 were used as the precursors and thioglycolic acid (TGA) was used as capping agent molecule. The structure and optical property of the nanocrystals were characterized by means of XRD, TEM, UV-visible optical spectroscopy and photoluminescence (PL). X-ray diffraction (XRD) and TEM analyses demonstrated hexagonal phase CdS nanocrystals with an average size around 2 nm. Synthesized nanocrystals exhibited band gap of about 3.2 eV and showed a broad band emission from 400-750 nm centered at 504 nm with a (0.27, 0.39) CIE coordinate. This emission can be attributed to recombination of an electron in conduction band with a hole trapped in Cd vacancies near to the valance band of CdS. The best attained photoluminescence quantum yield of the nanocrystals was about 12%, this amount is about 20 times higher than that for thioglycerol (TG) capped CdS nanocrystals. |
| first_indexed | 2024-12-21T13:49:05Z |
| format | Article |
| id | doaj.art-2868ac5c73544070a3e0e2523babd2e7 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T13:49:05Z |
| publishDate | 2011-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-2868ac5c73544070a3e0e2523babd2e72022-12-21T19:01:47ZengAIP Publishing LLCAIP Advances2158-32262011-03-0111012113012113-710.1063/1.3562892015101ADVInvestigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystalsM. Molaei0E. Saievar Iranizad1M. Marandi2N. Taghavinia3Physics Department, Tarbiat Modares University, Tehran, IranPhysics Department, Tarbiat Modares University, Tehran, IranPhysics Department, Arak University, Arak, IranPhysics Department, Sharif University of Technology, Tehran, IranIn this work we have synthesized CdS nanocrystals with thermochemical method. CdSO4 and Na2S2O3 were used as the precursors and thioglycolic acid (TGA) was used as capping agent molecule. The structure and optical property of the nanocrystals were characterized by means of XRD, TEM, UV-visible optical spectroscopy and photoluminescence (PL). X-ray diffraction (XRD) and TEM analyses demonstrated hexagonal phase CdS nanocrystals with an average size around 2 nm. Synthesized nanocrystals exhibited band gap of about 3.2 eV and showed a broad band emission from 400-750 nm centered at 504 nm with a (0.27, 0.39) CIE coordinate. This emission can be attributed to recombination of an electron in conduction band with a hole trapped in Cd vacancies near to the valance band of CdS. The best attained photoluminescence quantum yield of the nanocrystals was about 12%, this amount is about 20 times higher than that for thioglycerol (TG) capped CdS nanocrystals.http://dx.doi.org/10.1063/1.3562892 |
| spellingShingle | M. Molaei E. Saievar Iranizad M. Marandi N. Taghavinia Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals AIP Advances |
| title | Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals |
| title_full | Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals |
| title_fullStr | Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals |
| title_full_unstemmed | Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals |
| title_short | Investigation of the photoluminescence properties of thermochemically synthesized CdS nanocrystals |
| title_sort | investigation of the photoluminescence properties of thermochemically synthesized cds nanocrystals |
| url | http://dx.doi.org/10.1063/1.3562892 |
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