化学
光致发光
钙钛矿(结构)
相变
铵
相(物质)
无机化学
结晶学
有机化学
凝聚态物理
光电子学
物理
作者
Xue-Nan Li,Pengfei Li,Wei-Qiang Liao,Jia-Zhen Ge,De-Hong Wu,Heng-Yun Ye
标识
DOI:10.1002/ejic.201601269
摘要
In addition to the appealing semiconducting properties displayed by layered SnII or PbII halidometallates, intriguing phase-transition-induced properties, such as dielectric and ferroelectric properties, have recently been found by us in (benzylammonium)2PbCl4 and (cyclohexylammonium)2PbBr4–4xI4x (x = 0–1). The simple molecular structures of the layered compounds allow further chemical design for the modification of the physical properties. Thus, we extended the study to layered compounds templated by structurally similar organic cations to achieve future functions. Here, we report the design of a layered perovskite templated by cyclohexylmethylammonium cations, namely, bis[(cyclohexylmethyl)ammonium] tetrabromidolead(II). We found that this compound exhibits not only photoluminescence with a remarkably high efficiency (quantum yield = 21 %) but also interesting phase-transition-related physical properties, such as striking dielectric responses. These results reveal the great application potential of organic–inorganic hybrid compounds in the field of phase-transition multifunctional materials. More interesting phase-transition crystals are expected to be tailored in the future by taking advantage of the richness of layered perovskites.
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