Ion Doped Lead-Free Double Perovskite Cs2NaBiCl6 with Multiple Excitation and Tunable Emission towards Light Emitting and Anti-counterfeiting Applications

Ion doped lead-free double perovskite Cs 2 NaBiCl 6 with multiple excitation and tunable emission was fabricated towards light emitting (CNBC:30%Br − , 15%Mn 2+ ) and anti-counterfeiting applications (CNBC:30%Br − , 15%Mn 2+ , 12%Er 3+ , 12%Yb 3+ ), respectively.