Stabilized High-Membered and Phase-Pure 2D All Inorganic Ruddlesden–Popper Halide Perovskites Nanocrystals as Photocatalysts for the CO2 Reduction Reaction

Cheng Chieh Lin, Jia Ying Li, Nian Zu She, Shao Ku Huang, Chih Ying Huang, I. Ta Wang, Fu Li Tsai, Chuan Yu Wei, Ting Yi Lee, Di Yan Wang, Cheng Yen Wen, Shao Sian Li, Atsushi Yabushita, Chih Wei Luo, Chia Chun Chen*, Chun Wei Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In contrast to the 2D organic-inorganic hybrid Ruddlesden–Popper halide perovskites (RPP), a new class of 2D all inorganic RPP (IRPP) has been recently proposed by substituting the organic spacers with an optimal inorganic alternative of cesium cations (Cs+). Nevertheless, the synthesis of high-membered 2D IRPPs (n > 1) has been a very challenging task because the Cs+ need to act as both spacers and A-site cations simultaneously. This work presents the successful synthesis of stable phase-pure high-membered 2D IRPPs of Csn+1PbnBr3n+1 nanosheets (NSs) with n = 3 and 4 by employing the strategy of using additional strong binding bidentate ligands. The structures of the 2D IRPPs (n = 3 and 4) NSs are confirmed by powder X-ray diffraction and high-resolution aberration-corrected scanning transmission electron microscope measurements. These 2D IRPPs NSs exhibit a strong quantum confinement effect with tunable absorption and emission in the visible light range by varying their n values, attributed to their inherent 2D quantum-well structure. The superior structural and optical stability of the phase-pure high-membered 2D IRPPs make them a promising candidate as photocatalysts in CO2 reduction reactions with outstanding photocatalytic performance and long-term stability.

Original languageEnglish
Article number2107881
JournalSmall
Volume18
Issue number19
DOIs
Publication statusPublished - 2022 May 12

Keywords

  • 2D all-inorganic perovskites
  • CO reduction
  • Ruddlesden–Popper phases
  • high-membered perovskites
  • quantum well structure

ASJC Scopus subject areas

  • General Chemistry
  • Engineering (miscellaneous)
  • Biotechnology
  • General Materials Science
  • Biomaterials

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