[C6H14N]PbI3: a one-dimensional perovskite-like order–disorder phase transition material with semiconducting and switchable dielectric attributes†,Inorganic Chemistry Frontiers

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[C6H14N]PbI3: a one-dimensional perovskite-like order–disorder phase transition material with semiconducting and switchable dielectric attributes†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-01-26 00:00:00 , DOI: 10.1039/c7qi00722a
Aurang Zeb _{1,

2,

3,

4,

5} , Zhihua Sun _{1,

2,

3,

4,

5} , Asma Khan _{1,

2,

3,

4,

5} , Shuquan Zhang _{5,

6,

7,

8} , Tariq Khan _{1,

2,

3,

4,

5} , Muhammad Adnan Asghar _{1,

2,

3,

4,

5} , Junhua Luo _{1,

2,

3,

4,

5}

Affiliation

An organic–inorganic semiconducting compound of 1-methylpiperidinium triiodoplumbate(II) (MPIP), adopting a one-dimensional ABX₃ perovskite-like structure, has been synthesized. It is notable that MPIP undergoes a structural phase transition (SPT) at T_c ≅ 202 K, as confirmed by DSC and C_p analyses. Strikingly, MPIP exhibits remarkable switchable dielectric responses; that is, the distinct step-like anomalies in the vicinity of T_c. The switching between high-dielectric and low-dielectric states makes MPIP a potential switchable dielectric material. Single-crystal structural analysis reveals that the most distinct difference between its high-temperature phase (above T_c) and low-temperature phase (below T_c) is the order–disorder transformation of a 1-methylpiperidinium cation, which accounts for its SPT and striking dielectric response. Besides this, MPIP shows semiconducting behaviour with an optical bandgap of ∼2.48 eV, comparable to some other lead-iodide perovskites. The combination of semiconducting and dielectric attributes provides a new perspective for the design of hybrid perovskites as multifunctional materials.

中文翻译：

[C ₆ H ₁₄ N] PbI ₃：具有半导体和可切换介电特性的一维钙钛矿状有序无序相变材料†

合成了一种一维ABX ₃钙钛矿样结构的有机物-无机三甲基碘化哌啶鎓（II）（MPIP）化合物。值得注意的是，MPIP经历在结构相变（SPT）Ť _Ç ≅202 K，通过DSC和证实Ç _p分析。令人惊讶的是，MPIP具有出色的可切换介电响应。也就是说，在T _c附近存在明显的阶梯状异常。高介电和低介电状态之间的切换使MPIP一种潜在的可切换介电材料。单晶结构分析表明，其高温相（T _c之上）和低温相（T _c之下）之间最明显的区别是1-甲基哌啶阳离子的有序无序转化，这是其SPT的原因。和惊人的介电响应。除此之外，MPIP表现出半导体行为，其光学带隙为〜2.48 eV，可与某些其他碘化铅钙钛矿相媲美。半导体和介电属性的结合为杂化钙钛矿作为多功能材料的设计提供了新的视角。

更新日期：2018-01-26

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