Activated Self‐Trapped Excitons via Sb3+ Doping in Lead‐Free Perovskite Cs3Cu2I5 for Enhanced Nonlinear Optics and Ultrafast Mode‐Locking Operation (Advanced Optical Materials 28/2025)

Nonlinear Optical Properties The Sb-doped enhanced the self-trapped exciton (STE) properties of lead-free perovskite Cs3Cu2I5, which exhibited excellent nonlinear optical performance in the near-infrared region. More details can be found in the Research Article by Hongwei Chu, Dechun Li, and co-workers (DOI: 10.1002/adom.202501038).