Room temperature synthesis of nanocomposite thin films with embedded Cs2AgIn0.9Bi0.1Cl6 lead-free double perovskite nanocrystals with long-term water stability, wide range pH tolerance, and high quantum yield

Cs 2 AgIn 0.9 Bi 0.1 Cl 6 nanocrystals encapsulated with polystyrene or polymethyl methacrylate are described with high quantum yields, long luminescence lifetimes and water stability.