Lattice distortion-induced enhancement of near-infrared emission in Na/Yb co-doped Cs2AgBiCl6 double perovskites
Lanthanide-doped lead-free double perovskites (DPs) have attracted significant attention for near-infrared (NIR) optoelectronic applications; however, their luminescence efficiency remains limited by inefficient energy transfer and parity-forbidden 4f–4f transitions. Here, we report a lattice distortion engineering str...