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

doi:10.1002/smll.202107881

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

Small. 2022 May;18(19):e2107881. doi: 10.1002/smll.202107881. Epub 2022 Apr 13.

Authors

Cheng-Chieh Lin^{1

2}, Jia-Ying Li³, Nian-Zu She⁴, Shao-Ku Huang⁵, Chih-Ying Huang^{1

2}, I-Ta Wang^{1

2}, Fu-Li Tsai³, Chuan-Yu Wei⁵, Ting-Yi Lee³, Di-Yan Wang⁶, Cheng-Yen Wen^{1

5}, Shao-Sian Li⁷, Atsushi Yabushita⁴, Chih-Wei Luo⁴, Chia-Chun Chen^{3

8}, Chun-Wei Chen^{1

5

9}

Affiliations

¹ International Graduate Program of Molecular Science and Technology (NTU-MST), National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan.
² Molecular Science and Technology Program, Taiwan International Graduate Program (TIGP), Academia Sinica, No. 128, Sec. 2, Academia Rd, Taipei, 11529, Taiwan.
³ Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Chow Rd, Taipei, 11677, Taiwan.
⁴ Department of Electrophysics, National Yang Ming Chiao Tung University, No. 1001, University Road, Hsinchu, 30010, Taiwan.
⁵ Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan.
⁶ Department of Chemistry, Tunghai University, No.1727, Sec.4, Taiwan Boulevard, Taichung, 407224, Taiwan.
⁷ Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Sec. 3, Zhong-Xiao E. Rd, Taipei, 10608, Taiwan.
⁸ Institute of Atomic and Molecular Science, Academia Sinica, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan.
⁹ Center of Atomic Initiative for New Materials (AI-MAT), National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan.

PMID: 35417059
DOI: 10.1002/smll.202107881

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 Cs_n+1 Pb_n Br_3n+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 2 reduction; Ruddlesden-Popper phases; high-membered perovskites; quantum well structure.

Abstract

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