Enhanced luminescence efficiency and stability in deep-blue perovskite quantum dots through synergistic Zn ²⁺ /Ni ²⁺ co-doping

doping ratios, deep-blue emission at 463 nm with markedly enhanced photoluminescence quantum yield (PLQY) of 61% was achieved, which is nearly three times that of the pristine PQDs. Furthermore, the co-doped PQDs exhibit largely enhanced stability compared to the undoped counterpart. This study provides an effective co-doping approach to develop highly efficient and stable deep-blue emitting perovskite nanomaterials.