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- W2334301511 abstract "Single and multiple exciton relaxation dynamics of CdSe/CdZnS nanocrystal quantum dots (QDs) monitored at the two lowest optical transitions, 1Se-1S3/2 and 1Se-2S3/2, have been examined using ultrafast transient absorption (TA) spectroscopy. For the CdSe/CdZnS QDs studied, the 1Se-1S3/2 and 1Se-2S3/2 transitions are widely separated (∼180 meV) compared to bare CdSe QDs (∼50-100 meV), allowing for clearly distinguishable TA signals attributable to hot hole relaxation. Holes depopulate from the 2S3/2 state with a lifetime of 7 ± 2 ps, which is consistent with the predictions for hole relaxation via a phonon coupling pathway to lower-energy hole states, with possible contributions from hole trapping as well. These results suggest that tuning the surface chemistry of semiconductor QDs is a viable route to measure and possibly control their hot hole relaxation dynamics." @default.
- W2334301511 created "2016-06-24" @default.
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- W2334301511 date "2014-08-22" @default.
- W2334301511 modified "2023-09-27" @default.
- W2334301511 title "Uncovering Hot Hole Dynamics in CdSe Nanocrystals" @default.
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- W2334301511 doi "https://doi.org/10.1021/jz5015554" @default.
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