4.8 Article

Ultrastable Lead-Free CsAgCl2 Perovskite Microcrystals for Photocatalytic CO2 Reduction

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 21, Pages 5110-5114

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01128

Keywords

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Funding

  1. Fundamental Research Funds for the National Key Research and Development Program of China [2018YFB2200500]
  2. National Natural Science Foundation of China [61975023, 51775070, 22072010, 61875211]
  3. Guangdong Province International Scientific and Technological Cooperation Projects [2020A0505100011]
  4. CAS Interdisciplinary Innovation Team
  5. Open Fund of the State Key Laboratory of High Field Laser Physics (Shanghai Institute of Optics and Fine Mechanics)
  6. Opening Project of State Key Laboratory of Advanced Technology for Float Glass
  7. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) [2021-KF19]

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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.
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.

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