Vinayakan, R. ; Shanmugapriya, T. ; Nair, Pratheesh V. ; Ramamurthy, P. ; George Thomas, K. (2007) An approach for optimizing the shell thickness of core-shell quantum dots using photoinduced charge transfer The Journal of Physical Chemistry C, 111 (28). pp. 10146-10149. ISSN 1932-7447
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp072823h
Related URL: http://dx.doi.org/10.1021/jp072823h
Abstract
Photoinduced charge-transfer dynamics between CdSe quantum dots (QDs) possessing varying monolayers of ZnS and hole scavengers such as phenothiazine (PT) and N-methylphenothiazine (NMPT) were investigated for optimizing the shell thickness of core-shell quantum dots. Spectroscopic investigations indicate that phenothiazine binds onto the surface of bare CdSe QDs, resulting in the photoluminescence quenching, and two monolayers of ZnS prevent the electron-transfer process. Methodologies presented here can provide quantitative information on the optimum shell thickness of core-shell QDs, which can suppress the undesired electron transfer and provide maximum luminescence yield.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 51392 |
| Deposited On: | 28 Jul 2011 11:47 |
| Last Modified: | 28 Jul 2011 11:47 |
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