Ultrastable Lead-Free CsAgCl2 Perovskite Microcrystals for Photocatalytic CO2 Reduction

Nowadays, there is much attention focusing on lead halide perovskite because of its admirable performances in optoelectronic applications. However, the notorious toxicity and long-term instability are two main factors limiting its widespread applications. The findings of this work demonstrate a facile synthesis process for novel lead-free CsAgCl2 perovskite microcrystals with no organic ligand involved. The fundamental properties of the CsAgCl2 microcrystals are revealed by applying temperature-dependent X-ray diffraction and photoluminescence measurements from 77 to 300 K. Furthermore, the CsAgCl2 microcrystals exhibit excellent air (60 days), thermal (100 degrees C), and light stability. Meanwhile, the CsAgCl2 microcrystals have shown exciting potential applications in the fields of photocatalysis and photoelectrochemistry.

Automated summary

Lead halide perovskite has gained significant attention for its remarkable performance in optoelectronic applications, but its toxicity and instability have been major obstacles. This study introduces a facile synthesis process for novel lead-free CsAgCl2 perovskite microcrystals without organic ligands, showcasing excellent stability and potential applications in photocatalysis and photoelectrochemistry. The fundamental properties of CsAgCl2 microcrystals were characterized through temperature-dependent X-ray diffraction and photoluminescence measurements, revealing promising prospects for practical use.