Optical spectroscopy in combination with wide field or confocal optical microscopy enables the investigation of single quantum objects such asorganic molecules, II/VI semiconductor quantum dots and silicon nanocrystals.They all have fluctuations of luminescence intensities on time scales longerthan 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 propertiesof the matrix.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Materials Science(all)
- Physical and Theoretical Chemistry