Figure 1. UV-Visible absorbance and photoluminescence (blue, green, and red) spectra of QDs measure in toluene.

The PLE spectrum was taken at the maximum of PL intensity (460 nm, 530 nm, and 640 nm). For the PL spectrum, the sample was excited by a light beam with 365 nm. The insets are the photos of quantum dot solution under UV excitation.