| Autor: |
Xuan Lin Chen, Gui Fan Li, Yu Qiu Qu, Liu Yang Zhang, Hong Wei, Li Min An |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Advanced Materials Research. 981:879-882 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.981.879 |
| Popis: |
The CdSe/ZnS core/shell quantum dots (QDs) were synthesized and characterized with absorption spectrometry, photoluminescence (PL) spectrometry and transmission electron microscopy. PL quenching of colloidal CdSe/ZnS QDs in the presence of charge transferring material was studied by means of steady-state and time-resolved PL spectroscopy. With increasing charge transferring materials concentration in the CdSe/ZnS QDs solution, the PL intensity and lifetime of CdSe/ZnS QDs decrease gradually. The quenching efficiency of CdSe/ZnS QDs decrease with increasing the oxidation potential of charge transferring materials. Based on the analysis, there are two pathways in the PL quenching process: static quenching and dynamic quenching. The dynamic quenching is correlated with hole transfer from QDs to the charge transferring materials. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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