Light-induced charged and trap states in colloidal nanocrystals detected by variable pulse rate photoluminescence spectroscopy.

@article{Saba2013LightinducedCA,
  title={Light-induced charged and trap states in colloidal nanocrystals detected by variable pulse rate photoluminescence spectroscopy.},
  author={Michele Saba and Mauro Aresti and F. Quochi and Marco Marceddu and Maria Antonietta Loi and Jing Huang and Dmitri V Talapin and Andrea Mura and G. Bongiovanni},
  journal={ACS nano},
  year={2013},
  volume={7 1},
  pages={229-38}
}
Intensity instabilities are a common trademark of the photoluminescence of nanoemitters. This general behavior is commonly attributed to random fluctuations of free charges and activation of charge traps reducing the emission yield intermittently. However, the actual physical origin of this phenomenon is actively debated. Here we devise an experiment, variable pulse rate photoluminescence, to control the accumulation of charges and the activation of charge traps. The dynamics of these states is… CONTINUE READING