Piezoelectric sensors that can work under various conditions with superior performance are highly desirable the arrival of Internet Things. For practical applications, a large piezoelectric voltage coefficient g and high Curie temperature Tc critical to sensors. Here, we report two-dimensional perovskite ferroelectric (4-aminotetrahydropyran)2PbBr4 [(ATHP)2PbBr4] saturated polarization 5.6 μC cm–2, 503 K [above BaTiO3 (BTO, 393 K)], extremely g33 660.3 × 10–3 V m N–1 [much beyond Pb(Zr,Ti)O3...

Topological defects, such as vortices and skyrmions, provide a wealth of splendid possibilities for new nanoscale devices because their marvelous electronic, magnetic, mechanical behaviors. Recently, great advances have been made in the study ferroelectric vortex conventional perovskite oxides, BaTiO3 BiFeO3. Despite extensive interest, however, no intriguing structures yet found organic-inorganic hybrid perovskites (OIHPs), which are desirable flexibility, ease fabrication, low acoustical...

Two-dimensional (2D) hybrid organic–inorganic perovskites (HOIPs) are attracting tremendous interest for their great scientific and technological potential in photovoltaics optoelectronics. Although the ferroelectricity 2D HOIPs has been greatly developed, however, to date no phosphonium-based HOIP ferroelectrics have yet found. Meanwhile, electrostriction plays an important role electromechanical behavior of ferroelectrics, while it never reported ferroelectrics. Here, we present first...

Abstract Abundant chemical diversity and structural tunability make organic–inorganic hybrid perovskites (OIHPs) a rich ore for ferroelectrics. However, compared with their inorganic counterparts such as BaTiO 3 , ferroelectric key properties, including large spontaneous polarization ( P s ), low coercive field E c strong second harmonic generation (SHG) response, have long been great challenges, which hinder commercial applications. Here, quasi-one-dimensional OIHP DMAGeI (DMA =...

The ability to generate and manipulate photoluminescence (PL) behavior has been of primary importance for applications in information security. Excavating novel optical effects create more possibilities encoding become a continuous challenge. Herein, we present an unprecedented PL temporary quenching that highly couples with thermodynamic phase transition hybrid crystal (DMML)

Abstract Luminescent ferroelectrics are holding exciting prospect for integrated photoelectronic devices due to potential light‐polarization interactions at electron scale. Integrating ferroelectricity and long‐lived afterglow emission in a single material would offer new possibilities fundamental research applications, however, related reports have been blank date. For the first time, we here achieved combination of notable an organic‐inorganic hybrid material. Remarkably, presented...

A fluorochemical industrial park was built in 2004 Fuxin, China, for the production of polytetrafluoroethylene (PTFE) and perfluorobutane sulfonate (PFBS). Yet little is known about distribution fluorochemicals environment people living around park. In this study, environmental samples were collected from 22 sites Fuxin to investigate extent perfluorinated compound (PFC) contamination park, drinking water public supply system groundwater shallow aquifers private wells near Serum also...

Organic-inorganic hybrid perovskites (OIHPs) hold a great potential for scientific and technological endeavors in the field of ferroelectrics, solar cells, electroluminescent devices, because their structural diversity, low cost manufacture, ease fabrication. However, lead iodide perovskite ferroelectrics with narrow band gap have rarely been reported. Here, we present new two-dimensional (2D) layered ferroelectric, (4,4-DFHHA)2PbI4 (4,4-DFHHA = 4,4-difluorohexahydroazepine), spontaneous...

Switchable materials play an invaluable role in signal processing and encryption of smart devices. The development multifunctional that exhibit switching characteristics multiple physical channels has attracted widespread attention. Now, two chiral thermochromic ferroelastic crystals (S-CTA)2 CuCl4 (R-CTA)2 (CTA=3-chloro-2-hydroxypropyltrimethylammonium) have been prepared with switchable properties dielectricity, conductivity, second harmonic generation (SHG), piezoelectricity,...

Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs), which possess the merits of good material stability, structural diversity, and ease fabrication, are highly desirable for widespread applications ferroelectrics, solar cells, electroluminescent devices. Although some molecular design strategies toward ferroelectrics have been proposed, however, it is still a great challenge to precisely induce optimize ferroelectricity in 2D HOIPs. Here, first time through perfluorinated...

Hybrid organic-inorganic perovskites (HOIPs) with the general formula ABX3 hold phenomenal research interest for their great scientific and technological potential in photovoltaic, piezoelectric, electroluminescent devices. It is considerable structural diversity that offers a good opportunity to build variety of HOIP structures various functionalities. However, no organometallic-based piezoelectrics have yet been found, despite functional richness organometallic compounds such as...

3D ABX3 organic-inorganic halide perovskite (OIHP) semiconductors like [CH3 NH3 ]PbI3 have received great attention because of their various properties for wide applications. However, although a number low-dimensional lead-based OIHP ferroelectric been documented, obtaining is challenging. Herein, an A-site cation PH3 ]+ (methylphosphonium, MP) employed to successfully obtain lead-free semiconductor MPSnBr3 , which shows clear above-room-temperature ferroelectricity and direct bandgap 2.62...

Solid-state molecular rotor-type materials such as host–guest inclusion compounds are very desirable for the construction of ferroelectrics. However, they usually have a low Curie temperature (Tc) and uniaxial nature, severely hindering their practical applications. Herein, by regulating anion to control "momentum matching" in crystal structure, we successfully designed high-temperature multiaxial ferroelectric [(MeO–C6H4–NH3)(18-crown-6)][TFSA] (MeO–C6H4–NH3 = 4-methoxyanilinium, TFSA...

Abstract Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) have recently gained tremendous interest because of their unique features in contrast to three-dimensional counterparts and traditional 2D materials. However, although some HOIP ferroelectrics been achieved, the issue toxic Pb uniaxial nature impede further application. Herein, for first time, we report a lead-free multiaxial ferroelectric, [3,3-difluorocyclobutylammonium]2CuCl4 (1), which shows four ferroelectric...

By using a lead-free AgBi-based scheme, we successfully synthesized two-dimensional double perovskite ferroelastic (DPA) 4 AgBiBr 8 with high T c of 375 K and narrow band gap 2.44 eV, where DPA is 2,2-dimethylpropan-1-aminium.

Ferroelastics, as an important member of ferroic materials, play invaluable role in energy conversion, information processing, and mechanical switches. However, to date, it remains arduous task construct molecular ferroelastics with dielectric bistability/switching characteristics. Within this context, moreover, controlling the multiswitching behavior dielectrics has been a great challenge, while imparting them other fascinating properties (ferroelasticity semiconducting features) is even...

Organic-inorganic halide perovskites (OIHPs) are very eye-catching due to their chemical tunability and rich physical properties such as ferroelectricity, magnetism, photovoltaic photoluminescence. However, no nickel-based OIHP ferroelectrics have been reported so far. Here, we designed an ABX

Abstract Organic–inorganic hybrid lead halide perovskites (OLHPs), represented by (CH 3 NH )PbI , are one of the research focus due to their exceptional performance in optoelectronic applications, and ferroelastic domain walls benign charge carrier transport that is confirmed recently. Among them, 1D OLHPs feature better stability against desorption moisture, but related ones possessing ferroelasticity rarely investigated reported so far. In this work, semiconductor ( N ‐iodomethyl‐...

Since the concept of "multiferroic" was first proposed in 1968, coupling effect between different ferroic orders has attracted great interest energy, information, and biomedical fields. However, fully ferroelectric-fully ferroelastic never been experimentally observed hybrid perovskites, even though this predicted to exist half a century ago. Realizing such cross-linking effects polarization vectors strain tensors always huge challenge because complex difference these two origins. Here, we...

High- T c lead-free ferroelastic semiconductor ( R / S -CTA) 2 SbCl 5 was obtained through an H/OH-substitution-induced homochirality strategy, and undergoes phase transition at 410 K accompanied by switching between the SHG-active SHG-inactive states.

Open AccessCCS ChemistryRESEARCH ARTICLE6 Jun 2022Hybrid Optical-Electrical Perovskite Can Be a Ferroelastic Semiconductor Changyuan Su†, Mengmeng Lun†, Yidan Chen, Yichen Zhou, Zhixu Zhang, Ming Peizhi Huang, Dawei Fu and Yi Zhang Su† Ordered Matter Science Research Center, Jiangsu Key Laboratory for Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189 Institute the Ministry Education Advanced Catalysis Materials, Zhejiang Normal Jinhua 321004 , Lun† Chen Zhou...