文献类型：期刊文献

英文题名：Narrow Bandgap Perovskite Enabled by Heterovalent Co-Doping for Visible-NIR Light Photocatalytic CO2 Reduction

作者：Xue, Kuan[1];Pang, Jing Yi[2,3];Peng, Yu[1];Xia, Zhu Hui[1];Sui, Xin Yuan[1];Liu, Da[1];Zhu, Yan[1];Wang, Xing[1];Wang, Xue Lu[2,3];Yang, Hua Gui[1];Hou, Yu[1];Yang, Shuang[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Key Lab Ultrafine Mat,Minist Educ,Sch Mat Sci & En, Shanghai 200237, Peoples R China;[2]East China Normal Univ, Phys Dept, North Zhongshan Rd 3663, Shanghai 200062, Peoples R China;[3]East China Normal Univ, Sch Phys & Elect Sci, Shanghai Key Lab Magnet Resonance, North Zhongshan Rd 3663, Shanghai 200062, Peoples R China

年份：2025

卷号：31

期号：18

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;EI(收录号：20250817903536);WOS:【SCI-EXPANDED(收录号:WOS:001452931200034)】；

基金：This work was financially supported by National Natural Science Foundation of China (22379044, 52203330, 22274052, 22072045), Shanghai Pilot Program for Basic Research (22TQ1400100-5), "Dawn" Program of Shanghai Education Commission (22SG28), Shanghai Municipal Natural Science Foundation (22ZR1418000), Shanghai Sailing Program (22YF1410000), the Fundamental Research Funds for the Central Universities (JKD01241607, JKVD1241041), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400) and Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission).

语种：英文

外文关键词：Perovskite; Co-doping; Photocatalytic CO2 reduction

摘要：Metal halide perovskites have garnered significant attention due to their vast potential in various optoelectronic applications. While their tunable bandgap properties allow for light absorption across the ultraviolet and much of the visible spectrum, the coverage in the near-infrared (NIR) region remains limited. Here, we demonstrate a heterovalent co-doping method for synthesizing Ag and Bi doped CsSnBr3 crystals with absorption edge up to 1300 nm, making it one of the narrowest bandgap perovskite materials. The incorporation of trivalent Bi (p) orbitals is responsible for the band narrowing, while the monovalent Ag stabilizes the entire perovskite lattice. Taking advantage of the new energy states within the bandgap, the absorption edge of the co-dopants is extended to NIR region, so they can efficiently utilize sunlight. Moreover, the co-dopants exhibit significantly better antioxidation capability than the pristine CsSnBr3. When applied to CO2 photoreduction, the co-dopants achieved highly selective CO production performance, with an apparent quantum yield (AQY) of 7.56 % at 700 nm, representing a 94 % improvement over CsSnBr3. Overall, this study provides effective strategies for optimizing tin-based perovskites and holds significant implications for future research in enhancing stability, reducing toxicity, and optimizing optoelectronic performance.