@article{99e77aeca2e24942933a4cc14d79fa13,
title = "Stabilized High-Membered and Phase-Pure 2D All Inorganic Ruddlesden–Popper Halide Perovskites Nanocrystals as Photocatalysts for the CO2 Reduction Reaction",
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.",
keywords = "2D all-inorganic perovskites, CO reduction, Ruddlesden–Popper phases, high-membered perovskites, quantum well structure",
author = "Lin, {Cheng Chieh} and Li, {Jia Ying} and She, {Nian Zu} and Huang, {Shao Ku} and Huang, {Chih Ying} and Wang, {I. Ta} and Tsai, {Fu Li} and Wei, {Chuan Yu} and Lee, {Ting Yi} and Wang, {Di Yan} and Wen, {Cheng Yen} and Li, {Shao Sian} and Atsushi Yabushita and Luo, {Chih Wei} and Chen, {Chia Chun} and Chen, {Chun Wei}",
note = "Funding Information: The authors would like to thank the financial support from the Minister of Science and Technology (MOST), Taiwan (Project No. 107-2112-M-002-024-MY3, 107-2119-M-002-028-MY2, 107-2119-M-003-002, 108-2923-M-002-002-MY2, and 108-2119-M-003-001), and Taiwan Consortium of Emergent Crystalline Materials (TCECM). In addition, financial support by the Center of Atomic Initiative for New Materials (AI-MAT), National Taiwan University, from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan (108L9008) was acknowledged. Funding Information: The authors would like to thank the financial support from the Minister of Science and Technology (MOST), Taiwan (Project No. 107‐2112‐M‐002‐024‐MY3, 107‐2119‐M‐002‐028‐MY2, 107‐2119‐M‐003‐002, 108‐2923‐M‐002‐002‐MY2, and 108‐2119‐M‐003‐001), and Taiwan Consortium of Emergent Crystalline Materials (TCECM). In addition, financial support by the Center of Atomic Initiative for New Materials (AI‐MAT), National Taiwan University, from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan (108L9008) was acknowledged. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
month = may,
day = "12",
doi = "10.1002/smll.202107881",
language = "English",
volume = "18",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "19",
}