Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications

Science China Chemistry, Год журнала: 2021, Номер 64(12), С. 2060 - 2104

Опубликована: Ноя. 10, 2021

Язык: Английский

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Recent Progress of Chiral Perovskites: Materials, Synthesis, and Properties

Advanced Materials, Год журнала: 2021, Номер 33(26)

Опубликована: Май 24, 2021

Chiral materials with intrinsic inversion-symmetric structures possess many unique physicochemical features, including circular dichroism, circularly polarized photoluminescence, nonlinear optics, ferroelectricity, and spintronics. Halide perovskites have attracted considerable attention owing to their excellent optical electrical properties, which are particularly suitable for realizing high power-conversion efficiency in solar cells. Recent studies shown that chirality can be transferred from chiral organic ligands into halide the resultant combine advantages of both perovskites; this provides an ideal platform design next-generation optoelectronic spintronic devices. In progress report, most recent advances summarized various chemical perovskites, synthesis strategies, generation mechanisms, physical properties. Furthermore, potential chiral-halide-perovskite-based applications presented challenges prospects discussed. This report outlines diverse construction strategies proposes research directions thus, it insights novel facilitates investigation employ chirality.

Язык: Английский

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Recent Progress on Electrical and Optical Manipulations of Perovskite Photodetectors

Advanced Science, Год журнала: 2021, Номер 8(14)

Опубликована: Май 24, 2021

Photodetectors built from conventional bulk materials such as silicon, III-V or II-VI compound semiconductors are one of the most ubiquitous types technology in use today. The past decade has witnessed a dramatic increase interest emerging photodetectors based on perovskite driven by growing demands for uncooled, low-cost, lightweight, and even flexible photodetection technology. Though good electrical optical properties, perovskite-based always suffer nonideal quantum efficiency high-power consumption. Joint manipulation electrons photons is promising strategy to improve detection efficiency. In this review, characteristics typical first summarized. Electrical manipulations discussed. Then, artificial photonic nanostructures photon detailed light absorption By reviewing photodetectors, review aims provide strategies achieve high-performance photodetectors.

Язык: Английский

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Chiral Lead‐Free Hybrid Perovskites for Self‐Powered Circularly Polarized Light Detection

Angewandte Chemie International Edition, Год журнала: 2020, Номер 60(15), С. 8415 - 8418

Опубликована: Дек. 22, 2020

Abstract Metal‐halide perovskites are recently emerging as the promising alternative for CPL detection owing to their CPL‐sensitive property induced by chiral organics and efficient charge transport of inorganic frameworks. However, most these reported involve high concentrations toxic Pb which will become potential bottleneck further application. Herein, we successfully developed two lead‐free halide double perovskites, [( R )‐β‐MPA] 4 AgBiI 8 (( )‐β‐MPA=( )‐(+)‐β‐methylphenethylammonium, 1‐ ), S )‐(−)‐β‐methylphenethylammonium, ). Circular dichroism measurements reveal that exhibit notable chirality organic cations distinguish different polarization states photons. Significantly, they present unique polar photovoltaic, resulting self‐powered without an external power source is unprecedentedly achieved. Furthermore, anisotropy factor up 0.3 acquired detection, reaching highest value among perovskites. This work suggests hybrid photoelectronic candidates, provides a new approach exploring “green” circularly polarized light‐sensitive materials with performance.

Язык: Английский

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Intelligent infrared sensing enabled by tunable moiré quantum geometry

Nature, Год журнала: 2022, Номер 604(7905), С. 266 - 272

Опубликована: Апрель 13, 2022

Язык: Английский

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Chiral Induced Spin Selectivity

Chemical Reviews, Год журнала: 2024, Номер 124(4), С. 1950 - 1991

Опубликована: Фев. 16, 2024

Since the initial landmark study on chiral induced spin selectivity (CISS) effect in 1999, considerable experimental and theoretical efforts have been made to understand physical underpinnings mechanistic features of this interesting phenomenon. As first formulated, CISS refers innate ability materials act as filters for electron transport; however, more recent experiments demonstrate that displacement currents arising from charge polarization molecules lead without need net flow. With its identification a fundamental connection between symmetry materials, promises profound ubiquitous implications existing technologies new approaches answering age old questions, such homochiral nature life. This review begins with discussion different methods measuring then provides comprehensive overview known exhibit CISS-based phenomena before proceeding identify structure-property relations delineate leading models effect. Next, it identifies some physics, chemistry, biology. The ends critical assessment field comments future outlook.

Язык: Английский

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Realization of vis–NIR Dual-Modal Circularly Polarized Light Detection in Chiral Perovskite Bulk Crystals

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(35), С. 14077 - 14082

Опубликована: Авг. 24, 2021

Circularly polarized light (CPL)-sensitive direct detection is attracting increasing attention owing to its various optical technology applications and ultracompact device structures. However, current CPL-sensitive mainly focuses on a single mode, whereas the visible-near-infrared (vis-NIR) dual-modal detection, which important for improving sensitivity night-vision performance, still remains be explored. Here, first time, vis-NIR presented in bulk crystals of two-dimensional chiral perovskite (R-BPEA)2PbI4 (R-BPEA = (R)-1-(4-bromophenyl)ethylammonium). Benefiting from strong light-matter interaction layered structure, shows two-photon absorption (TPA) coefficient up 55 cm/MW, almost falls around highest value 2D hybrid perovskites. Notably, exhibits high detecting performance under both visible (520 nm) NIR (800 nm), with on/off ratios higher than 103, anisotropy factors photocurrent 0.1. This work will shed design new semiconductors large TPA promote their detection.

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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Strong Second- and Third-Harmonic Generation in 1D Chiral Hybrid Bismuth Halides

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(39), С. 16095 - 16104

Опубликована: Сен. 24, 2021

Breaking the symmetry of a crystal structure can enable even-order nonlinear activities, including second-harmonic generation (SHG). The emerging chiral hybrid organic–inorganic metal halides feature unique optical and electronic properties flexible structures, making them class promising materials. However, their response performances are currently inferior to traditional crystals, because lack research on resonant enhancement third-harmonic (THG). Herein, we designed bismuth with naturally nonsymmetrical SHG. Simultaneously, these compounds preserve 1D structures create strong free exciton, broad self-trapped exciton (STE), discrete band energy levels, which facilitate SHG THG susceptibilities. These new films showcase superior effective susceptibility (χ(2) ∼ 130.5 pm V–1 at an interesting wavelength 1550 nm), exceeding that reference, commercial LiNbO3 83.4 V–1) single-crystal film. Furthermore, intensities even higher than intensities, (χ(3)) being ∼9.0 × 106 pm2 V–2 nm (37 times reference monolayer WS2). Their high indicate future toward applications.

Язык: Английский

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Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(22), С. 9707 - 9714

Опубликована: Май 16, 2022

We developed type-II core-shell nanocrystals (NCs) with a chiral low-dimensional perovskite shell and an achiral 3D MAPbBr3 core. The NCs exhibit spin-polarized luminescence at the first excitation band of core, which is due to chiral-induced spin selectivity (CISS) effect-governed spin-dependent shell-to-core electron transportation subsequent electron-hole recombination in preferred state transferred electrons determined by handness shell. For film, photoluminescence quantum yield (PLQY) 54% circularly polarized (CPL) maximum |glum| 4.0 × 10-3 are obtained room temperature. Finally, we achieved light-emitting diode (spin-LED), affording electroluminescence (CP-EL) |gCP-EL|of 6.0 under ambient conditions.

Язык: Английский

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