Photon-correlation Fourier spectroscopy of the trion fluorescence in thick-shell CdSe/CdS nanocrystals

The emission spectrum of the trion state in very thick shell CdSe/CdS nanocrystals is characterized at 4 K by photon correlation Fourier spectroscopy. A value of 50 mu eV for the width of the zero phonon line is measured. The absence of blinking and the high photostability of these emitters offer th...

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Bibliographic Details
Published inPhysical review. B, Condensed matter and materials physics Vol. 91; no. 8
Main Authors Biadala, L., Frederich, H., Coolen, L., Buil, S., Quélin, X., Javaux, C., Nasilowski, M., Dubertret, B., Hermier, J.-P.
Format Journal Article
LanguageEnglish
Published American Physical Society 18.02.2015
Subjects
Cadmium selenides
Cadmium sulfides
Condensed Matter
Emitters
Intermetallics
Nanocrystals
Other
Physics
Spectroscopy
Time
Trions
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Summary:The emission spectrum of the trion state in very thick shell CdSe/CdS nanocrystals is characterized at 4 K by photon correlation Fourier spectroscopy. A value of 50 mu eV for the width of the zero phonon line is measured. The absence of blinking and the high photostability of these emitters offer the possibility to investigate the dynamics of the emission spectrum at a time scale as short as 250 ns. We show that the high value of the linewidth (50 mu eV) is not due to spectral diffusion induced by the close environment of the emitter at time scales larger than 250 ns. The broadening is attributed to the additional third carrier when compared to the monoexcitonic state.
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content type line 23
ISSN:1098-0121
1538-4489
1550-235X
1550-235X
DOI:10.1103/PhysRevB.91.085416