Two-dimensional (2D) materials have been well developed for polarization-sensitive photodetection, while new 2D members used in shortwave region (>2.5 eV) still remain scarce. The family of hybrid perovskite ferroelectrics, which the coupling spontaneous polarization ( Ps) and light benefits dissociation photoinduced carriers, has shown great potential this portfolio. Here, we report a ferroelectric, [CH3(CH2)3NH3]2(CH3NH3)Pb2Br7 (1), exhibits superior Ps 3.6 μC/cm2 relatively wide bandgap...

Halide double perovskites have recently bloomed as the green candidates for optoelectronic applications, such X-ray detection. Despite great efforts, exploration of promising organic-inorganic hybrid toward detection remains unsuccessful. Now, single crystals lead-free perovskite, (BA)2 CsAgBiBr7 (BA+ is n-butylammonium), featuring unique 2D multilayered quantum-confined motif, enable quite large μτ (mobility-lifetime) product up to 1.21×10-3 cm2 V-1 . This figure-of-merit realized in...

Although two-dimensional (2D) metal-halide double perovskites display versatile physical properties due to their huge structural compatibility, room-temperature ferroelectric behavior has not yet been reported for this fascinating family. Here, we designed a material composed of 2D halide perovskites, (chloropropylammonium)4 AgBiBr8 , using an organic asymmetric dipolar ligand. It exhibits concrete ferroelectricity, including Curie temperature 305 K and notable spontaneous polarization ≈3.2...

Antiferroelectrics, characterized by the natural polarization-electric field (P-E) double hysteresis loops, has been developed as a promising branch for energy storage. Here, we present first antiferroelectric in booming family of lead iodide hybrid perovskites, (BA)2(EA)2Pb3I10 (1, where BA = n-butylammonium and EA ethylammonium), which exhibits one highest Curie temperatures (∼363 K) majority known molecular systems. Strikingly, its high-temperature antiferroelectricity, triggered an...

Abstract Self‐powered photodetection driven by ferroelectric polarization has shown great potential in next‐generation optoelectronic devices. Hybrid perovskite ferroelectrics that combine and semiconducting properties have a promising position within this portfolio. Herein, we demonstrate the realization of self‐powered new developed biaxial ferroelectric, (EA) 2 (MA) Pb 3 Br 10 ( 1 , EA is ethylammonium MA methylammonium), which displays high Curie temperature (375 K), superior spontaneous...

By dimensional reduction of the 3D motif Cs2 AgBiBr6 , a lead-free 2D hybrid double perovskite, (i-PA)2 CsAgBiBr7 (1, i-PA=isopentylammonium), was successfully designed. It adopts quantum-confined bilayered structure with alternating organic and inorganic sheets. Strikingly, unique architecture endows it highly anisotropic nature physical properties, including electric conductivity optical absorption (the ratio αb /αc =1.9 at 405 nm). Such anisotropy attributes result in strong...

Polarized-light detection in solar-blind ultraviolet region is indispensable for optoelectronic applications, whereas new 2D candidates targeted at UV range remain extremely scarce. hybrid perovskite ferroelectrics that combine polarization and semiconducting properties are of increasing interest. Here, using the 3D-to-2D dimensional reduction CH3 NH3 PbCl3 , we designed a multilayered ferroelectric, (CH3 CH2 )2 Pb3 Cl10 which shows spontaneous high Curie temperature (390 K) comparable with...

Multiphoton absorption (MPA) has been utilized for important technological applications. High-order multiphoton harvesting (e.g., five-photon absorption, 5PA) exhibits unique properties that could benefit biophotonics. Within this field, perovskite oxide ferroelectrics BaTiO3 ) enable low-order optical nonlinearities of 2PA/3PA processes. However, it is challenging to obtain efficient, high-order 5PA effects. Herein, the first time, giant and broadband MPA are presented in 2D hybrid...

Halide double perovskites have emerged as remarkable semiconductors owing to their nontoxicity and superior optoelectronic features. Despite recent exciting progress, halide with bulk ferroelectricity are still sparse. Herein, we report the discovery of a multiaxial layered perovskite ferroelectric, BA2CsAgBiBr7 (1, BA = n-butylammonium), which exhibits fascinating ferroelectric feature Curie temperature ∼273 K unique semiconducting nature. Particularly, for 1, dimensional reduction reduced...

2D materials with inherent attributes of structural anisotropy have been well applied in the field polarization-sensitive photodetection. However, to explore new members strong polarized-light responses still remains a challenge. Herein, by alloying diamine molecule into 3D prototype CsPbBr3 , Dion-Jacobson (DJ) type perovskite (HDA)CsPb2 Br7 (1, where HDA2+ is 1,6-hexamethylenediammonium), containing both inorganic Cs metal and organic cations designed. The natural characteristics 1 are...

Abstract 2D organic–inorganic hybrid perovskites are emerging as the promising alternatives in photodetection, due to their unique merits stemming from intrinsic quantum‐confined structures. Despite great ongoing effects, highly sensitive and ultrafast responding photodetectors of remain a huge blank. Here, first nanosecond‐responsive array photodetector based on perovskite crystals (PA) 2 (G)Pb I 7 (where PA = n ‐pentylaminium G guanidinium) is fabricated, which features newly tailored...

Abstract Although two‐dimensional (2D) metal–halide double perovskites display versatile physical properties due to their huge structural compatibility, room‐temperature ferroelectric behavior has not yet been reported for this fascinating family. Here, we designed a material composed of 2D halide perovskites, (chloropropylammonium) 4 AgBiBr 8 , using an organic asymmetric dipolar ligand. It exhibits concrete ferroelectricity, including Curie temperature 305 K and notable spontaneous...

Abstract Self‐powered photodetection driven by ferroelectric polarization has shown great potential in next‐generation optoelectronic devices. Hybrid perovskite ferroelectrics that combine and semiconducting properties have a promising position within this portfolio. Herein, we demonstrate the realization of self‐powered new developed biaxial ferroelectric, (EA) 2 (MA) Pb 3 Br 10 ( 1 , EA is ethylammonium MA methylammonium), which displays high Curie temperature (375 K), superior spontaneous...

Self-powered photodetection with an extremely low detection limit of 82 nW cm⁻² is achieved in a 2D hybrid perovskite ferroelectric. This result sheds light on future advances ferroelectrics toward smart optoelectronic device applications.

Abstract Halide double perovskites have recently bloomed as the green candidates for optoelectronic applications, such X‐ray detection. Despite great efforts, exploration of promising organic–inorganic hybrid toward detection remains unsuccessful. Now, single crystals lead‐free perovskite, (BA) 2 CsAgBiBr 7 (BA + is n‐butylammonium), featuring unique 2D multilayered quantum‐confined motif, enable quite large μτ (mobility‐lifetime) product up to 1.21×10 −3 cm V −1 . This figure‐of‐merit...

Organic-inorganic hybrid perovskites, most markedly CH3NH3PbI3, have attracted extensive interest because of their potential use in optoelectronic and photovoltaic applications. Nevertheless, the toxicity lead restricts further application. Here, we successfully synthesized two lead-free heteromorphic hybrids, (C7H18N2O)3Sb4I18·H2O (1) (C7H18N2O)Sb2I8·H2O (2, C7H18N2O2+ is N-aminopropylmorpholinium), both which belong to zero-dimensional tetranuclear perovskite-like structure. However,...

3D perovskite CsPbBr3 has recently taken a blooming position for optoelectronic applications. However, due to the lack of natural anisotropy optical attributes, it is great challenge fulfil polarization-sensitive photodetection. Here, first time, we exploited dimensionality reduction tailor 2D-multilayered hybrid perovskite, (TRA)2 CsPb2 Br7 (1, in which TRA (carboxy)cyclohexylmethylammonium), serving as potential polarized-light detecting candidate. Its unique quantum-confined 2D structure...

In the past decade, proliferation of modern telecommunication technologies, including 5G, and widespread adoption Internet-of-things (IoT) have led to an unprecedented surge in data generation transmission. This has created escalating demand for advanced signal processing capabilities. Microwave photonic (MWP) processors offer a promising solution satisfy this by capitalising on high bandwidth low latency achievable optical systems. work, we introduce integrated MWP unit all-optical RF...

Abstract By dimensional reduction of the 3D motif Cs 2 AgBiBr 6 , a lead‐free 2D hybrid double perovskite, ( i ‐PA) CsAgBiBr 7 1, ‐PA=isopentylammonium), was successfully designed. It adopts quantum‐confined bilayered structure with alternating organic and inorganic sheets. Strikingly, unique architecture endows it highly anisotropic nature physical properties, including electric conductivity optical absorption (the ratio α b / c =1.9 at 405 nm). Such anisotropy attributes result in strong...

Abstract Polarized‐light detection in solar‐blind ultraviolet region is indispensable for optoelectronic applications, whereas new 2D candidates targeted at UV range remain extremely scarce. hybrid perovskite ferroelectrics that combine polarization and semiconducting properties are of increasing interest. Here, using the 3D‐to‐2D dimensional reduction CH 3 NH PbCl , we designed a multilayered ferroelectric, (CH 2 ) Pb Cl 10 which shows spontaneous high Curie temperature (390 K) comparable...

We presented a new inorganic–organic hybrid compound, which exhibits phase transition and dielectric anisotropy properties.

We present a new 2D hybrid perovskite by alloying secondary dimethylammonium cation as the “perovskiter” into PbI₃framework, which shows strong in-plane photoresponses.