Fig. 2

Photoluminescence spectroscopy of conjugates. a PL emission spectra for Zn x Cd1 − x S (x = 1.0 (a), 0.75 (b), 0.50 (c), 0.25 (d), and 0 (e). b The energy band structure suggested for three main emissions of alloyed Zn x Cd1 − x S quantum dots