Figure 3. Correlated PL intensity and lifetime fluctuations: A-type blinking and flickering.

a, PL intensity (black lines) and average lifetime (red lines) trajectories and corresponding FLIDs for the nanocrystal shown in Figs. 2b–c at three different potentials. Binary blinking seen at V = 0 V is suppressed at V = +0.6 V, whereas electron injection is achieved at V = −0.6 V. In the FLID color scale, red corresponds to the most frequently occurring intensity-lifetime pair, while probabilities below 1% of this maximum are represented by dark blue. A linear scaling from blue to red is used in-between. b, Data from the same nanocrystal, acquired on a different day, display continuous PL intensity and lifetime fluctuations, typical of flickering. At V = −1.1 V, we observe emission from a doubly charged exciton X²⁻. All data were analyzed with a bin size of 50 ms. Full time trajectories for (a) and (b) are shown in Supplementary Fig. 1.