Lead-Free Direct Band Gap Double-Perovskite Nanocrystals with Bright Dual-Color Emission

Lead-free double-perovskite nanocrystals (NCs), that is, Cs 2 AgIn x Bi 1– x Cl 6 ( x = 0, 0.25, 0.5, 0.75, and 0.9), that can be tuned from indirect band gap ( x = 0, 0.25, and 0.5) to direct band gap ( x = 0.75 and 0.9) are designed. Direct band gap NCs exhibit 3 times greater absorption cross sec... View More