Zero-dimensional metal halides exhibit intriguing photophysical properties; however, developing their general design principles remains challenging. Now it has been shown that two-dimensional perovskites can be converted into zero-dimensional octahedral metal halides through solvent incorporation. The resulting materials feature near-unity photoluminescence quantum yields. Structural rigidity and the choice of metal cation are key parameters to tune the exciton recombination dynamics.
- Nanlong Zheng
- Songqi Cao
- Zhiwei Liu
