Yagnaseni Ghosh

TL;DR: In this article, the role of charging in photoluminescence quenching was investigated in colloidal nanocrystals, and two distinct types of blinking are possible: conventional (A-type) blinking due to charging and discharging of the nanocrystal core, and a second sort (B-type), in which large changes in the emission intensity are not accompanied by significant changes in emission dynamics.

TL;DR: It is found that two distinct types of blinking are possible: conventional (A-type) blinking due to charging and discharging of the nanocrystal core, in which lower photoluminescence intensities correlate with shorter photolumscence lifetimes; and a second sort (B-type), in which large changes in the emission intensity are not accompanied by significant changes in emission dynamics.

TL;DR: Whether LEDs based on thick-shell nanocrystals, so-called "giant" NQDs, afford enhanced performance compared to their counterparts incorporating thin-shell systems is determined.

TL;DR: It is found that ultra-thick-shell CdSe/CdS nanocrystals can exhibit pronounced fluctuations in the emission lifetimes (lifetime blinking), despite stable nonblinking emission intensity, and it is demonstrated that lifetime variations are due to switching between the neutral and negatively charged state of the nanocrystal.

TL;DR: Measurements indicate that high Q(2X)'s are not required to achieve complete suppression of PL intensity fluctuations in individual nanocrystals, indicating a significant dependence of Q( 2X) upon subtle structural differences.