Single- and tri-doping strategies with Mn 2+ , Sn 2+ , and Pb 2+ in cadmium-based metal halides for primary-color and tunable white-light emission

. In this sample, each emission center is responsible for one of the three primary-color emissions, namely red, green, or blue, and at least six distinct emission colors, including white light, can be generated by tuning the excitation wavelength. This unique excitation-dependent luminescence behavior demonstrates its great potential for advanced anti-counterfeiting and multicolor light-emitting applications.