Abstract
Temperature-dependent photoluminescence (PL) measurements were carried out ZnSe/ZnS quantum dots (QDs) grown with post-growth interruption under a dimethylzinc (DMZn) flow. The PL spectra showed sigmoidal peak shifts and V-shaped full width at half maximum (FWHM) variations with increasing temperature, which strongly suggest that the QD structure of ZnSe/ZnS is quite similar to that of other material systems grown in the Stranski-Krastanov mode. Apparent differences are revealed as a consequence of DMZn treatment: (i) the PL spectra of ZnSe/ZnS QDs showed peaks at higher energies and persisted up to 300 K, and(ii) the minimum points of the V-shaped FWHM appear at a higher temperature compared to H2-purged ZnSe/ZnS QDs. Experimental results demonstrate the enhancement of localization energy.
Original language | English |
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Pages (from-to) | 937-940 |
Number of pages | 4 |
Journal | Solid State Communications |
Volume | 149 |
Issue number | 23-24 |
DOIs | |
Publication status | Published - 2009 Jun |
Bibliographical note
Funding Information:This work was supported by grant No. R01-2006-000-10330-0 from the Basic Research Program of the Korea Science & Engineering Foundation.
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry