Compact high-quality CdSe-CdS core-shell nanocrystals with narrow emission linewidths and suppressed blinking.

ABSTRACT: High particle uniformity, high photoluminescence quantum yields, narrow and symmetric emission spectral lineshapes and minimal single-dot emission intermittency (known as blinking) have been recognized as universal requirements for the successful use of colloidal quantum dots in nearly all optical applications. However, synthesizing samples that simultaneously meet all these four criteria has proven challenging. Here, we report the synthesis of such high-quality CdSe-CdS core-shell quantum dots in an optimized process that maintains a slow growth rate of the shell through the use of octanethiol and cadmium oleate as precursors. In contrast with previous observations, single-dot blinking is significantly suppressed with only a relatively thin shell. Furthermore, we demonstrate the eliminati

SUBMITTER: Chen O 

PROVIDER: S-EPMC3677691 | biostudies-literature | 2013 May

REPOSITORIES: biostudies-literature