Band-Gap and Dimensional Engineering in Lead-Free Inorganic Halide Double Perovskite Cs4Cu1-xAg2xSb2Cl12 Single Crystals and Nanocrystals

Wei Zhou; Peigeng Han; Cheng Luo; Cheng Luo; Cheng Li; Jie Hou; Jie Hou; Yang Yu; Ruifeng Lu

doi:10.3389/fmats.2022.855950

Frontiers in Materials (Apr 2022)

Band-Gap and Dimensional Engineering in Lead-Free Inorganic Halide Double Perovskite Cs4Cu1-xAg2xSb2Cl12 Single Crystals and Nanocrystals

Wei Zhou,
Peigeng Han,
Cheng Luo,
Cheng Luo,
Cheng Li,
Jie Hou,
Jie Hou,
Yang Yu,
Ruifeng Lu

Affiliations

Wei Zhou: Department of Applied Physics & MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Institute of Ultrafast Optical Physics, Nanjing University of Science and Technology, Nanjing, China
Peigeng Han: Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
Cheng Luo: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, China
Cheng Luo: University of the Chinese Academy of Sciences, Beijing, China
Cheng Li: Department of Applied Physics & MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Institute of Ultrafast Optical Physics, Nanjing University of Science and Technology, Nanjing, China
Jie Hou: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, China
Jie Hou: University of the Chinese Academy of Sciences, Beijing, China
Yang Yu: Department of Applied Physics & MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Institute of Ultrafast Optical Physics, Nanjing University of Science and Technology, Nanjing, China
Ruifeng Lu: Department of Applied Physics & MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Institute of Ultrafast Optical Physics, Nanjing University of Science and Technology, Nanjing, China

DOI: https://doi.org/10.3389/fmats.2022.855950
Journal volume & issue: Vol. 9

Abstract

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Lead free double perovskites (DPs) are promising materials due to their non-toxic and tunable optical properties. In this work, a series of lead-free halide DP single crystals (SCs) and nanocrystals (NCs) (Cs4Cu1-xAg2xSb2Cl12) were reported. With alloying strategy, the optical band-gap engineering was realized and the dimension can be controlled between 2D and 3D. The Cu-alloyed SCs exhibit strong absorption from the UV-visible region to the near-infrared range (can even completely cover the bands of NIR-I and NIR-II). In addition, (Cs4Cu1-xAg2xSb2Cl12) NCs were synthesized via a top-down approach, which maintains similar optical properties and the dimensional transformation phenomenon to SCs. These results suggest the great potential of Cs4Cu1-xAg2xSb2Cl12 SCs and NCs for photovoltaic and optoelectronic applications.

Published in Frontiers in Materials

ISSN: 2296-8016 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology
Website: https://www.frontiersin.org/journals/materials

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