Abstract
AbstractWe present results of time‐resolved luminescence measurements of CdSe quantum dots embedded in glass with radii around 20 Å using intense picosecond excitation resonant into the first excited hole state of a photodarkened sample. Distinct luminescence bands with different spectral widths and positions are found. Their decay on nano‐ and subnanosecond time scales reflects three different relaxation processes. The fastest luminescence component is discussed in terms of the direct recombination of the excited electron–hole pair, the slower components as being due to the recombination from surface‐related states.
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