Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Electrical Engineering, Measurement and Control Technology
We 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.
Type of Medium: