Fig. 1. Original (a) and normalized (b) PL spectra of crude colloids of undoped AIS QDs (curve 1) and CAIS QDs prepared at Cu : Ag = 0.2 : 1 (curve 2), 0.3 : 1 (curve 3), 0.6 : 1 (curve 4), 0.7 : 1 (curve 5), 0.8 : 1 (curve 6), and 1 : 1 (curve 7). (c) Maximum position (blue squares) and spectral width (red circles) of the PL band of CAIS/ZnS QDs produced at a different Cu : Ag ratio. Ag : In : S = 1 : 7 : 10.