Temperature Dependence of Excitonic and Biexcitonic Decay Rates in Colloidal Nanoplatelets by Time-Gated Photon Correlation.

The Journal of Physical Chemistry Letters
Elad BenjaminDan Oron

Abstract

Excitons in colloidal semiconductor nanoplatelets (NPLs) are weakly confined in the lateral dimensions. This results in significantly smaller Auger rates and, consequently, larger biexciton quantum yields, when compared to spherical quantum dots (QDs). Here we report a study of the temperature dependence of the biexciton Auger rate in individual CdSe/CdS core-shell NPLs, through the measurement of time-gated second-order photon correlations in the photoluminescence. We also utilize this method to directly estimate the single-exciton radiative rate. We find that whereas the radiative lifetime of NPLs increases with temperature, the Auger lifetime is almost temperature-independent. Our findings suggest that Auger recombination in NPLs is qualitatively similar to that of semiconductor quantum wells. Time-gated photon correlation measurements offer the unique ability to study multiphoton emission events, while excluding effects of competing fast processes, and can provide significant insight into the photophysics of a variety of nanocrystal multiphoton emitters.

References

Dec 5, 2009·Chemical Reviews·Dmitri V TalapinElena V Shevchenko
Oct 25, 2011·Nature Materials·S IthurriaAl L Efros
Nov 24, 2011·Chemical Reviews·Anna KubackaGerardo Colón
Jul 13, 2012·ACS Nano·Mickaël D TessierBenoit Dubertret
Apr 30, 2014·Nano Letters·Chunxing SheDmitri V Talapin
Aug 12, 2015·The Journal of Physical Chemistry Letters·Erfan BaghaniMatthew Pelton
Oct 27, 2015·Nano Letters·Freddy T RabouwDaniël Vanmaekelbergh
Jul 28, 2017·Nature Communications·Zhili YangEdo Waks

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