Abstract
Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.
| Original language | English |
|---|---|
| Article number | 081303 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 80 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 11 2009 |
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Glennon, J. J., Tang, R., Buhro, W. E., Loomis, R. A., Bussian, D. A., Htoon, H., & Klimov, V. I. (2009). Exciton localization and migration in individual CdSe quantum wires at low temperatures. Physical Review B - Condensed Matter and Materials Physics, 80(8), [081303]. https://doi.org/10.1103/PhysRevB.80.081303