Chirality-Regulated Spin-Polarization of Perovskite Nanoplates for Photocatalytic CO 2 Reduction Reaction

作者：Cheng‐Chieh Lin, S.-H. Huang, Wei-Ni Tseng, Chun‐Jen Su, Chao Huang, Chih-Ying Huang, C.L. Yu, Man‐Hong Lai, Jiayuan Sun, Yu‐Chiang Chao, Hua‐Shu Hsu, Chih‐Wei Luo, Yu‐Ming Chang, Chia‐Chun Chen, Chun‐Wei Chen · 发表于：Journal of the American Chemical Society · 年份：2025 · DOI：10.1021/jacs.5c11357 · 被引用次数：23 · 研究领域：Perovskite Materials and Applications、Advanced Photocatalysis Techniques、Advanced Condensed Matter Physics

High Resolution Image Download MS PowerPoint Slide Manipulating spin polarizations of photoexcited electrons has been found to play a vital role in enhancing photocatalytic CO 2 conversion by suppressing carrier recombination. In this work, photocatalytic CO 2 reduction conversion efficiencies are significantly enhanced by chirality-regulated spin-polarization of CsPbBr 3 perovskite nanocrystals. We propose the chirality-regulated perovskite thin films by incorporating chiral molecules (MBA:Br) into all-inorganic CsPbBr 3 perovskite nanoplates (NPLs), resulting in (R)- and (S)-2D Ruddlesden–Popper perovskite (RPP)/NPL hybrids. In this configuration, the chiral 2D RPP perovskites offer a significant chiroptical response that promotes the generation of spin-polarized electrons. The chirality-regulated spin-polarization of 2D RPP/NPLs hybrid perovskite thin films has significantly suppressed charge carrier recombination rates, thereby enhancing the efficiency of photocatalytic CO 2 reduction. By harnessing the synergistic effects of induced chirality and the application of an external magnetic field of 0.3 T, the photocatalytic CO 2 reduction efficiencies of the chiral perovskites can be enhanced to be five times that of the pristine CsPbBr 3 perovskite NPLs. The interplay between structure, chirality, spin polarization, and carrier dynamics associated with the enhanced photocatalytic activity of perovskite nanocrystals was systematically analyzed using grazing-incidence wide-an...