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首页> 外文期刊>Inorganic Chemistry Frontiers >Successive near-room-temperature dielectric phase transitions in a lead-free hybrid perovskite-like compound
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Successive near-room-temperature dielectric phase transitions in a lead-free hybrid perovskite-like compound

机译：在无铅杂交钙钛矿化合物中连续的近室温介电相转变

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摘要

Solid-solid phase transition materials have attracted increasing attention because of their variety of applications in optoelectronic devices, data storage, and ferroelectric field-effect transistors. Hybrid organic-inorganic perovskite materials combine the characteristics of organic and inorganic components and thus might be promising candidates to obtain phase-transition materials. Here, we report a lead-free organic-inorganic hybrid (hexamethyleneimine)(2)BiBr5 (1), which displays successive phase transitions at 268 K, 304 K and 311 K upon heating; these phase transitions are induced by the distorted configurational change in organic cations and slight reorientational displacement of [BiBr5]n(2-) polyanionic zigzag chains. In addition, the UV/Vis optical spectrum indicates that 1 has an indirect bandgap of 2.70 eV. Furthermore, computational analyses disclose that the inorganic perovskite-like building blocks of 1 contribute significantly to its semiconducting properties. This study offers a pathway to explore new lead-free organic-inorganic hybrids with phase transition.
机译：由于它们在光电器件，数据存储和铁电场效应晶体管中的各种应用，固体固相过渡材料引起了越来越长的关注。杂交有机无机钙钛矿材料结合了有机和无机成分的特征，因此可能是获得相转移材料的有希望的候选物。在此，我们报告了无铅有机 - 无机杂交（六亚甲基亚胺）（2）BIBR5（1），其在加热时显示268k，304k和311k的连续相转变;这些相转变由有机阳离子的扭曲的配置变化和[BIBR5] n（2-）偏振锯齿链的轻微重新定向位移诱导。另外，UV / VI光谱表示1具有2.70eV的间接带隙。此外，计算分析公开了1的无机钙钛矿状结构块与其半导体性质有显着贡献。本研究提供了一种途径，可探索具有相变的新的无铅有机无机杂种。

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  • 来源
    《Inorganic Chemistry Frontiers》 |2019年第1期|共5页
  • 作者

    Zhang Jing; Han Shiguo; Liu Xitao; Ji Chengmin; Tao Kewen; Asghar Muhammad Adnan; Luo Junhua; Sun Zhihua;

  • 作者单位

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Univ Educ Dept Chem Lahore Pakistan;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 无机化学;
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