  Three models of single colloidal quantum dot emission fluctuations (blinking)
based on spectral diffusion were considered analytically and numerically. It
was shown that the only one of them, namely the Frantsuzov and Marcus model
reproduces the key properties of the phenomenon. The other two models, the
Diffusion-Controlled Electron Transfer (DCET) model and the Extended DCET model
predict that after an initial blinking period, most of the QDs should become
permanently bright or permanently dark which is significantly different from
the experimentally observed behavior.
