期刊
INORGANIC CHEMISTRY FRONTIERS
卷 6, 期 1, 页码 233-237出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi01097h
关键词
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资金
- National Natural Science Foundation of China [21622108, 21875251, 21525104, 21833010, 21601188, 51502290, 51502288]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20010200]
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.
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