Alloying CIS NCs with other metals is one such approach. Specifically, zinc (Zn)- and cadmium (Cd)-alloyed CIS NCs have received considerable attention. Several laboratories have reported Zn– CIS NCs with tunable band gaps covering the whole visible spectrum. Green-to-red visible and near infrared QDs based on Zn–CIS have been developed (Zhang and Zhong 2011; Zhang et al. 2011;Chung et al. 2012; Feng et al. 2011). Cd-alloyed CIS NCs, as an important class of materials for solar cells and photocatalysis, also demonstrate a capacity for band gap/size/structure tuning (Wang et al. 2010).