Chirality‐Dependent Second‐Order Nonlinear Optical Effect in 1D Organic–Inorganic Hybrid Perovskite Bulk Single Crystal

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(36), С. 20021 - 20026

Опубликована: Июль 5, 2021

Abstract The introduction of chirality into organic–inorganic hybrid perovskites (OIHPs) is expected to achieve excellent photoelectric and nonlinear materials related circular dichroism. Owing the existence asymmetric center intrinsic in chiral OIHPs, different efficiencies second harmonic generation (SHG) signal occurs when circularly polarized light (CPL) with phases passes through crystal, which defined as dichroism (SHG‐CD). Here, SHG‐CD effect developed bulk single crystals one‐dimensional (1D) [( R / S )‐3‐aminopiperidine]PbI 4 . It first time that CPL distinguished using chirality‐dependent OIHPs crystals. Such technology extends detection range near infrared region (NIR). In this way, anisotropy factor (g ) high 0.21.

Язык: Английский

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Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

Advanced Functional Materials, Год журнала: 2023, Номер 34(6)

Опубликована: Окт. 27, 2023

Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, radiation detectors. The impressive optical optoelectronic properties, along with rapid increase efficiencies cells LEDs, greatly attracted researchers across many disciplines. However, most advances made so far terms preparation (colloidal nanocrystals films), devices highest are based on Pb‐based halide which raised concerns over their commercialization due to toxicity Pb. This has triggered search lower‐toxicity Pb‐free perovskites led significant progress last few years. In this roadmap review, different expertise joined together summarize latest progress, outstanding challenges, future directions perovskite regarding synthesis, spectroscopy, devices, guide currently working area well those that will join field future.

Язык: Английский

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Tuning the Circular Dichroism and Circular Polarized Luminescence Intensities of Chiral 2D Hybrid Organic–Inorganic Perovskites through Halogenation of the Organic Ions

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(39), С. 21434 - 21440

Опубликована: Июль 28, 2021

Abstract Through the incorporation of various halogen‐substituted chiral organic cations, effects molecules on chiroptical properties hybrid organic–inorganic perovskites (HOIPs) are investigated. Among them, HOIP having a Cl‐substituted cation exhibits highest circular dichroism (CD) and polarized luminescence (CPL) intensities, indicating existence largest rotatory strength, whereas F‐substituted HIOP shows weakest intensities. The observed modulation can be correlated to varied magnetic transition dipole HOIPs, which is sensitive d‐spacing between inorganic layers halogen–halogen interaction cations sheets. These counteracting meet optimal CD CPL intensity with chlorine substitution, rendering strength HOIPs arranged in order (ClMBA) 2 PbI 4 >(BrMBA) >(IMBA) >(MBA) >(FMBA) .

Язык: Английский

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Circularly Polarized Fluorescence Resonance Energy Transfer (C‐FRET) for Efficient Chirality Transmission within an Intermolecular System

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(46), С. 24549 - 24557

Опубликована: Авг. 23, 2021

Abstract The occurrence and transmission of chirality is a fascinating characteristic nature. However, the intermolecular efficiency circularly polarized luminescence (CPL) remains challenging due to poor through‐space energy transfer. We report unique CPL from inducing achiral acceptor emit within specific liquid crystal (LC)‐based system through fluorescence resonance transfer ( C ‐FRET), wherein luminescent cholesteric LC employed as donor, rationally designed long‐wavelength aggregation‐induced emission (AIE) fluorophore acts well‐assembled acceptor. In contrast photon‐release‐and‐absorption, channel ‐FRET highly dependent upon in intrinsic chiral assembly LC, verified by deliberately separating donor keep it far beyond distance. This mode provides de novo strategy concept for high‐level information processing applications such high‐density data storage, combinatorial logic calculation, multilevel encryption decryption.

Язык: Английский

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Control of light, spin and charge with chiral metal halide semiconductors

Nature Reviews Chemistry, Год журнала: 2022, Номер 6(7), С. 470 - 485

Опубликована: Июнь 27, 2022

Язык: Английский

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Direct Detection of Circularly Polarized Light Using Chiral Copper Chloride–Carbon Nanotube Heterostructures

ACS Nano, Год журнала: 2021, Номер 15(4), С. 7608 - 7617

Опубликована: Апрель 6, 2021

The emergent properties of chiral organic-inorganic hybrid materials offer opportunities in spin-dependent optoelectronic devices. One the most promising applications where spin, charge, and light are strongly coupled is circularly polarized (CPL) detection. However, performance state-of-the-art CPL detectors using metal halide semiconductors still limited by low anisotropy factor, poor conductivity, photoresponsivity. Here, we synthesize 0D copper chloride hybrids, templated methylbenzylammonium (R/S-MBA), i.e., (R-/S-MBA)2CuCl4, that display circular dichroism for ligand-to-metal charge transfer transition with an absorption factor (gCD) among largest reported semiconductor hybrids. To circumvent conductivity unpercolated inorganic framework this absorber, develop a direct detector utilizes heterojunction between (MBA)2CuCl4 absorber layer semiconducting single-walled carbon nanotube (s-SWCNT) transport channel. Our heterostructure shows high photoresponsivity 452 A/W, competitive (gres) up to 0.21, current response microamperes, working voltage down 0.01 V. results clearly demonstrate useful strategy toward high-performance devices, nanoscale enables detection even highly insulating materials.

Язык: Английский

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Helical polymers for dissymmetric circularly polarized light imaging

Nature, Год журнала: 2023, Номер 617(7959), С. 92 - 99

Опубликована: Май 3, 2023

Язык: Английский

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Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection

Advanced Materials, Год журнала: 2022, Номер 34(51)

Опубликована: Сен. 21, 2022

Direct detection of circularly polarized light (CPL) is a challenging task due to limited materials and ambiguous structure-property relationships that lead low distinguishability the helicities. Perovskite ferroelectric semiconductors incorporating chirality provide new opportunities in dealing with this issue. Herein, pair 2D chiral perovskite ferroelectrics reported, which have enhanced CPL performance interplays among lattice, photon, charge, spin, orbit. The chirality-transfer-induced chiral&polar phase enhances asymmetric nature photoactive sublattice achieves switchable self-powered via bulk photovoltaic effect. single-crystal-based device exhibits CPL-sensitive under 430 nm an factor 0.20 for left- right-CPL differentiation, about two times pure counterparts. ascribed Rashba-Dresselhaus effect originates from inversion asymmetry strong spin-orbit coupling, shown large Rashba coefficient, demonstrated by density functional theory calculation excited photoluminescence measurement. These results perspectives on direct ferroelectrics-based chiroptics spintronics.

Язык: Английский

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High Responsivity Circular Polarized Light Detectors based on Quasi Two-Dimensional Chiral Perovskite Films

ACS Nano, Год журнала: 2022, Номер 16(2), С. 2682 - 2689

Опубликована: Фев. 2, 2022

Circularly polarized light (CPL) has considerable technological potential, from quantum computing to bioimaging. To maximize the opportunity, high performance photodetectors that can directly distinguish left-handed and right-handed circularly are needed. Hybrid organic-inorganic perovskites containing chiral organic ligands an emerging candidate for active material in CPL photodetecting devices, but current studies suggest there be a trade-off between ability differentially absorb photocurrent responsivity devices. Here, we report detector based on quasi two-dimensional (quasi-2D) perovskite films. We find it is possible generate materials where circular dichroism (CD) comparable both 2D quasi-2D films, while of photodetector improves latter. Given this, able showcase exhibits dissymmetry factor 0.15 15.7 A W-1. believe our data further advocates potential CPL-dependent photonic technologies.

Язык: Английский

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Ferroelectric hybrid organic–inorganic perovskites and their structural and functional diversity

National Science Review, Год журнала: 2022, Номер 10(2)

Опубликована: Ноя. 2, 2022

ABSTRACT Molecular ferroelectrics have gradually aroused great interest in both fundamental scientific research and technological applications because of their easy processing, light weight mechanical flexibility. Hybrid organic–inorganic perovskite (HOIPFs), as a class molecule-based ferroelectrics, diverse functionalities owing to unique structure become hot spot molecular research. Therefore, they are extremely attractive the field ferroelectrics. However, there seems be lack systematic review design, performance potential applications. Herein, we recent development HOIPFs from lead-based, lead-free metal-free perovskites, outline versatility these including piezoelectricity for energy-harvesting optoelectronic properties photovoltaics detection. Furthermore, perspective view challenges future directions is also highlighted.

Язык: Английский

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