Acharya, Shinjita ; Sarma, D. D. ; Jana, Nikhil R. ; Pradhan, Narayan (2010) An alternate route to high-quality ZnSe and Mn-doped ZnSe nanocrystals Journal of Physical Chemistry Letters, 1 (2). pp. 485-488. ISSN 1948-7185
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jz900291a
Related URL: http://dx.doi.org/10.1021/jz900291a
Abstract
We report here a synthetic route for high-quality Mn-doped ZnSe nanocrystals using selenourea as a selenium source, avoiding the more conventional route using tributylphosphine (TBP) that restricts the growth of spherical ZnSe nanocrystals below 5 nm in size, besides being highly toxic and pyrophoric. Spherical ZnSe nanocrystals with unprecedented sizes (up to 12 nm) are synthesized, the large size of the host helps to keep dopant ions well inside the nanocrystal, leading to intense and stable dopant emission. Mn-doped ZnSe nanocrystals with more than 50% quantum yield (QY) are synthesized in this method and found to be stable both in aqueous and nonaqueous dispersions for months.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| Keywords: | Semiconductor Nanocrystals; Colloidal; Zinc Selenide; Manganese Doping; Quantum Yield |
| ID Code: | 46417 |
| Deposited On: | 04 Jul 2011 12:13 |
| Last Modified: | 04 Jul 2011 12:13 |
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