Ultrastable Lead-Free CsAgCl<sub>2</sub> Perovskite Microcrystals for Photocatalytic CO<sub>2</sub> Reduction
Daofu Wu, Jiaer Zhou, Wei Kang, Kang An, Jiayu Yang, Miao Zhou, Peng He, Qiang Huang, Xiaosheng Tang
Abstract
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 °C), and light stability. Meanwhile, the CsAgCl2 microcrystals have shown exciting potential applications in the fields of photocatalysis and photoelectrochemistry.