Abstract Hybrid perovskite materials are famous for their great application potential in photovoltaics and optoelectronics. Among them, lead‐iodide‐based perovskites receive attention because of good optical absorption ability excellent electrical transport properties. Although many believe the ferroelectric photovoltaic effect (FEPV) plays a crucial role high conversion efficiency, ferroelectricity CH 3 NH PbI is still under debate, obtaining lead iodide challenging. In order to avoid...

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...

A 75% TiO₂/HAp composite photocatalyst with excellent NO removal efficiency was successfully synthesized. The photocatalytic improvement mechanism investigated systematically.

Molecular ferroelectrics are attracting tremendous interest because of their easy and environmental-friendly processing, low acoustic impedance, mechanical flexibility. Their ferroelectric mechanism is mainly ascribed to the order-disorder transition molecules such as spherical 1,4-diazabicyclo[2.2.2] octane (DABCO) quinuclidine. Here, we present two molecular ferroelectrics, [HDABCO][TFSA] its deuterated one [DDABCO][TFSA] (TFSA = bis(trifluoromethylsulfonyl)ammonium), whose...

Ferroelectrics are attractive due to their great application potential in information storage, optoelectronics, spintronics and sensing. As an important characteristic affecting semiconducting applications, the energy band structure is for development of light-emitting devices. Although it a tremendous challenge tune bandgap inorganic ferroelectric materials strict requirement structural symmetry fragile ferroelectricity, hybrid organic–inorganic perovskite (HOIP) ferroelectrics, which have...

On the path of persisting Moore's Law, one biggest obstacles is "Boltzmann tyranny," which defines lower limit power consumption individual transistors. Negative capacitance (NC) in ferroelectrics could provide a solution and has garnered significant attention fields nanoelectronics, materials science, solid-state physics. Molecular ferroelectrics, as an integral part have developed rapidly terms both performance functionality, with their inherent advantages such easy fabrication, mechanical...

Anatomizing mixed-phases, referring to analyzing the mixing profiles and quantifying phases' proportions in a material, which is of great significance genuine applications. Here, by using second-harmonic generation (SHG) polarimetry piezoresponse force microscopy (PFM) techniques, this work elucidates contributions distributions two different symmetric phases mixed an archetype monoaxial molecular ferroelectric, diisopropylammonium chloride (DIPACl). The competing are preferred...

Dynamic acoustic beam manipulation via tunable metasurfaces (AMs) has attracted significant attention. However, most current AMs are primarily designed for airborne sound, feature complex structural components, and serve a singular purpose. This study proposes coding Moiré metasurface (CMM) consisting of two cascaded (ACMs) to dynamically manipulate ultrasonic beams in water. The CMM merges the characteristics can achieve different manipulations by rotating ACM changing sequence. is...

With the discovery of colossal magnetoresistance materials and high-temperature superconductors, Mott insulators can potentially undergo a transition from insulating state to metallic state. Here, in molecular ferroelectrics system, insulator (C7H14N)3V12O30 has been first synthesized, which is 2D organic-inorganic ferroelectric with composition layered vanadium oxide quinuclidine ring. Interestingly, accompanied by phase transition, changes sharply conductivity. The occurrence proven...

Traditional oxide ferroelectrics have long struggled to produce flexible, large-area, and high-quality thin films at low temperatures, despite their good piezoelectric activity. Organic-inorganic hybrid perovskite (OIHPFs), by contrast, are gaining popularity as promising candidates for next-generation flexible self-powered electric devices due easy solution-processability, structural adjustability, mechanical flexibility, superior performance. However, practical use is hindered a lengthy...

A capsule catalyst, being composed of a catalytic zeolite membrane and catalyst core, can accomplish multiple catalysis reactions or several organic synthesis in single step, enhancing energy efficiency, erasing unnecessary separation engineering, creating many unexpected synergistic effects via tandem catalysis. This report discloses an ethanol strategy from syngas (CO + H2) syngas-derived dimethyl ether (DME) by tailor-made with macroscopic structure. The macroscopically designed consisted...

Abstract 2D ferroelectric materials with out‐of‐plane polarization are crucial for future nanoscale logic devices due to the increasing demand energy‐efficient architectures in artificial intelligence. However, only a few ferroelectrics confirmed experimentally. As an important branch of ferroelectrics, organic–inorganic hybrid perovskite show flexible structures, making them eligible constructing multifunctional materials. Here, (6‐BHA) 2 CdBr 4 (6‐BHA is 6‐bromohexylamine) designed, which...

Ferroelectric domains and domain walls are unique characteristics of ferroelectric materials. Among them, charged (CDWs) a special kind peculiar microstructure that highly improve conductivity, piezoelectricity, photovoltaic efficiency. Thus, CDWs believed to be the key ferroelectrics' future application in fields energy, sensing, information storage, so forth. Studies on one most attractive directions conventional inorganic ceramics. However, newly emerged molecular ferroelectrics, which...

Microscale lenses are mostly used as near-sighted lenses. The far-field imaging properties of a microscale spherical lens, where the lens is spatially separated from object, experimentally studied. Our experimental results show that, for blu-ray disc (an object) whose spacing 300 nm, can magnify stripe patterns when object. In tested range (0-14 μm), all magnified images virtual images. When distance increased 0 to 14 μm magnification decreases 1.47× 1.20× and field view increases 3.8 12.2...

Plasmon–exciton–plasmon (PEP) couplings in Ag–J-aggregates–Ag (AJA) nanostructures are investigated using the finite element method. By adjusting geometry and incident angle, strong among localized surface plasmon resonances (LSPRs), exciton resonances, polaritons (SPPs) were achieved AJA nanostructure, resulting three new hybridized plexcimon modes. We carefully analyzed SPP–exciton–LSPR coupling behaviors nanostructure based on classic oscillator models obtained weighting efficiencies of...