Journal ArticleDOI
A Molecular Perovskite with Switchable Coordination Bonds for High-Temperature Multiaxial Ferroelectrics.
Reads0
Chats0
TLDR
It is shown that the bond-switching transition under ambient pressure is designable in molecular crystals, and how to utilize the weaker and switchable coordination bonds in a novel molecular perovskite, suggesting TMC-1 as a promising candidate for applications in next-generation flexible electronics.Abstract:
The underlying phase transitions of ferroelectric mechanisms in molecular crystals are mainly limited to order–disorder and displacive types that are not involved in breaking of the chemical bonds. Here, we show that the bond-switching transition under ambient pressure is designable in molecular crystals, and demonstrate how to utilize the weaker and switchable coordination bonds in a novel molecular perovskite, [(CH3)3NOH]2[KFe(CN)6] (TMC-1), to afford a scarce multiaxial ferroelectrics with a high Curie temperature of 402 K and 24 equivalent ferroelectric directions (more than BaTiO3). The high-quality thin films of TMC-1 can be easily fabricated by a simple solution process, and to reveal perfect ferroelectric properties at both macroscopic and microscopic scales, suggesting TMC-1 as a promising candidate for applications in next-generation flexible electronics. The presented molecular assembly strategy, together with the achieved bond-switching ferroelectric mechanism, opens a new avenue for designing...read more
Citations
More filters
Journal ArticleDOI
Metal-free three-dimensional perovskite ferroelectrics
Heng-Yun Ye,Yuan-Yuan Tang,Peng-Fei Li,Wei-Qiang Liao,Wei-Qiang Liao,Ji-Xing Gao,Xiu-Ni Hua,Hu Cai,Ping-Ping Shi,Ping-Ping Shi,Yu-Meng You,Ren-Gen Xiong,Ren-Gen Xiong +12 more
TL;DR: A family of metal-free organic perovskite ferroelectrics with the characteristic three-dimensional structure is found, among which MDABCO (N-methyl-N'-diazabicyclo[2.2]octonium)–ammonium triiodide has a spontaneous polarization, which makes it attractive for use in flexible devices, soft robotics, biomedical devices, and other applications.
Journal ArticleDOI
A molecular perovskite solid solution with piezoelectricity stronger than lead zirconate titanate.
Wei-Qiang Liao,Dewei Zhao,Yuan-Yuan Tang,Yi Zhang,Peng-Fei Li,Ping-Ping Shi,Xiao-Gang Chen,Yu-Meng You,Ren-Gen Xiong,Ren-Gen Xiong +9 more
TL;DR: A molecular material with piezoelectric properties comparable to the industry-standard ceramic lead zirconate titanate is described, the exceptional properties come from finding a molecular solid-solution series that allows for compositional optimization of the piezoeselectric properties.
Journal ArticleDOI
Molecular Design Principles for Ferroelectrics: Ferroelectrochemistry
TL;DR: The concept of "ferroelectrochemistry", which is concerned with the target design and performance optimization of molecular ferroelectrics from the chemical point of view, is proposed and aims to provide insight into the fundamental chemistry and physics of Molecular ferroelectric materials.
Journal ArticleDOI
Toward the Targeted Design of Molecular Ferroelectrics: Modifying Molecular Symmetries and Homochirality
TL;DR: Hochirality, a superiority of molecular materials over the inorganic ones, was demonstrated as an effective approach to increase the incidence of ferroelectric crystal structures and the "momentum matching theory", a phenomenological theory based on the Curie symmetry principle is proposed.
Journal ArticleDOI
Precise Molecular Design of High-Tc 3D Organic–Inorganic Perovskite Ferroelectric: [MeHdabco]RbI3 (MeHdabco = N-Methyl-1,4-diazoniabicyclo[2.2.2]octane)
Wan-Ying Zhang,Yuan-Yuan Tang,Peng-Fei Li,Ping-Ping Shi,Wei-Qiang Liao,Da-Wei Fu,Heng-Yun Ye,Yi Zhang,Ren-Gen Xiong +8 more
TL;DR: This is the first time that the dabco component has been successfully wrapped into a 3D cage to achieve ferroelectricity and this precise molecular design strategy based on the modification of molecular symmetry provides an efficient route to enrich the family of 3D organic-inorganic perovskite ferroelectrics.
References
More filters
Journal ArticleDOI
Applications of Modern Ferroelectrics
TL;DR: Electroelectric arrays of lead zirconate titanate have been reported on Pt nanowire interconnects and nanorings with 5-nanometer diameters and electron emission from ferroelectrics yields cheap, high-power microwave devices and miniature x-ray and neutron sources.
Journal ArticleDOI
Post-Perovskite Phase Transition in MgSiO3
TL;DR: Results demonstrate that MgSiO3 perovskite transforms to a new high-pressure form with stacked SiO6-octahedral sheet structure above 125 gigapascals and 2500 kelvin (2700-kilometer depth near the base of the mantle) with an increase in density of 1.0 to 1.2%.
Journal ArticleDOI
Ferroelectric Metal–Organic Frameworks
Wen Zhang,Ren-Gen Xiong +1 more
TL;DR: The ferroelectric properties of some lately reported MOFs will be presented in this talk, covering their triggering mechanism, designing strategies and potential applications as multifunctional materials.
Journal ArticleDOI
Giant tunnel electroresistance for non-destructive readout of ferroelectric states
Vincent Garcia,Stéphane Fusil,Stéphane Fusil,Karim Bouzehouane,Shaïma Enouz-Vedrenne,Neil D. Mathur,Agnès Barthélémy,Manuel Bibes +7 more
TL;DR: The approach exploits the otherwise undesirable leakage current—dominated by tunnelling at these very low thicknesses—to read the polarization state without destroying it, and demonstrates scalability down to 70 nm, corresponding to potential densities of >16 Gbit inch-2.
Journal ArticleDOI
Chemically diverse and multifunctional hybrid organic–inorganic perovskites
TL;DR: Hybrid organic-inorganic perovskites (HOIPs) as mentioned in this paper can have a diverse range of compositions including halides, azides, formates, dicyanamides, cyanides, and Dicyanometallates.