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首页> 中文期刊> 《中国科学》 >Two SbX_(5)-based isostructural polar 1D hybrid antimony halides with tunable broadband emission,nonlinear optics,and semiconductor properties

Two SbX_(5)-based isostructural polar 1D hybrid antimony halides with tunable broadband emission,nonlinear optics,and semiconductor properties

         
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摘要

Metal halide perovskites based on MX6(M is metal and X is halogen)octahedra have developed into significant materials,extensively used in many fields,such as solid-state lighting,semiconductor,and nonlinear optics.However,the MX_(5)square pyramid-based hybrid metal halides beyond zero-dimensional(0D)polyhedrons and clusters are rarely reported.Herein,we reported two new isostructural hybrid antimony halides,namely(2cepyH)SbCl4(1-Cl)and(2cepyH)SbBr4(2-Br)(2cepy=1-(2-chloroethyl)pyrrolidine),characterized by 1D polar polyanionic chains formed by corner-sharing SbX_(5)tetragonal pyramid units.Upon photoexcitation at 340 nm,1-Cl shows broad,yellow phosphorescence emissions stemming from triplet self-trapped excitons,as proved by its long lifetime(6.85μs)and the temperature dependences of broadband emission.To our knowledge,this should be the first observation on the broadband emissive properties in the 1D hybrid metal halide constructed by MX_(5)tetragonal pyramid units.Moreover,second harmonic generation measurements show that the nonlinear optical properties of 2-Br(∼3.2×KDP)are superior to that of 1-Cl(∼1.8×KDP).Experimental and calculated data indicate that the bandgap of 1-Cl is larger than that of 2-Br and that the polar inorganic moieties determine their band structures.Our work opens up a new way for constructing broadband emission materials with novel polar frameworks.

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  • 来源
    《中国科学》 |2021年第12期|P.2111-2117|共7页
  • 作者

    Zhikai Qi; Yali Chen; Huizhi Gao; Fu-Qiang Zhang; Shi-Li Li; Xian-Ming Zhang;

  • 作者单位

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 China;

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 China;

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 China;

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 China;

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 China;

    Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and Culture School of Chemistry and Material Science Shanxi Normal University Linfen 041004 ChinaKey Laboratory of Interface Science and Engineering in Advanced Material(Ministry of Education) College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 有机化学;
  • 关键词

    metal halide; square pyramid; broadband emission; second harmonic generation; semiconductor;

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