Monte-Carlo simulations of photoinduced fluorescence enhancement in semiconductor quantum dot arrays

Photoinduced fluorescence enhancement (PFE) in semiconductor quantum dot (QD) arrays is simulated by a Monte-Carlo method based on the distributed tunneling model. PFE, a property of a QD ensemble, is directly related to the blinking behavior of single QDs. The origin of PFE is attributed not to an increase in the emission intensity during the ‘on’ period, but to the prolongation of average ‘on’ time.