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- W2034607429 abstract "Abstract The stretched exponential photoluminescence decay of the energy-resolved broadband emission of purified and unpurified CdS quantum dots (QDs) made in reverse micelles is characterized as a function of photolysis time and thiol addition. Photolysis is found to proportionately increase both the lifetime and quantum yield of these QDs. This proportionality is consistent with a simple parallel channel model of the decay of the excited states. The ultimate QY of the purified sample is found to be as high as 24%, which is twice that previously reported for this preparation. At −70 °C both the QY and the lifetime increase by more than a factor of two, indicating that thermal quenching limits the QY at room temperature. Finally, the addition of alkanethiols is shown to red-shift and quench the emission while only modestly altering the lifetime. These thiolated QDs show an extremely large temperature dependence of QY, demonstrating stronger thermal quenching than the unfunctionalized QDs." @default.
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- W2034607429 date "2007-12-01" @default.
- W2034607429 modified "2023-09-26" @default.
- W2034607429 title "Luminescence decay of broadband emission from CdS quantum dots" @default.
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- W2034607429 doi "https://doi.org/10.1016/j.jlumin.2007.02.061" @default.
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