https://doi.org/10.1140/epjst/e2007-00105-0
Common luminescence intensity fluctuations of single particle and single molecules in non-conducing matrices
1
OSMP, TU Chemnitz, 09107 Chemnitz, Germany
2
NanoMA, TU Chemnitz, 09107 Chemnitz, Germany
3
POM, TU Chemnitz, 09107 Chemnitz, Germany
4
Institute of Physics, Leipzig University, 04103 Leipzig, Germany
5
Fraunhofer Institut IZM, 09126 Chemnitz, Germany
6
Emory University, 201 Dowman Drive, 30322, Atlanta, Georgia, USA
Optical spectroscopy in combination with wide field or confocal optical microscopy enables the investigation of single quantum objects such as organic molecules, II/VI semiconductor quantum dots and silicon nanocrystals. They all have fluctuations of luminescence intensities on time scales longer than μs in common. A comparison reveals that despite the large differences of the nature of the respective quantum objects, the intensity fluctuations are related to a slow ionisation process followed by a trapping of the photoejected charge in the non-conducing environment. Detailed aspects of the dynamics are controlled by the dielectric properties of the matrix.
© EDP Sciences, Springer-Verlag, 2007
