Chiral Hybrid Germanium(II) Halide with Strong Nonlinear Chiroptical Properties DOI Open Access
Hebin Wang, Junzi Li,

Haolin Lu

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(41)

Published: Aug. 23, 2023

Due to the pronounced anisotropic response circularly polarized light, chiral hybrid organic-inorganic metal halides have been regarded as promising candidates for application in nonlinear chiroptics, especially second-harmonic generation circular dichroism (SHG-CD) effect. However, designing novel lead-free with large anisotropy factors and high laser-induced damage thresholds (LDT) of SHG-CD remains challenging. Herein, we develop first germanium halide, (R/S-NEA)3 Ge2 I7 ⋅H2 O (R/S-NGI), systematically investigated its linear chiroptical properties. S-NGI R-NGI exhibit (gSHG-CD ) 0.45 0.48, respectively, along a LDT 38.46 GW/cm2 ; these were highest values among reported halides. Moreover, effective second-order optical coefficient could reach up 0.86 pm/V, which was 2.9 times higher than that commercial Y-cut quartz. Our findings facilitate new avenue toward halides, their implementation applications.

Language: Английский

Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications DOI
Zhongliang Gong, Xuefeng Zhu, Zhonghao Zhou

et al.

Science China Chemistry, Journal Year: 2021, Volume and Issue: 64(12), P. 2060 - 2104

Published: Nov. 10, 2021

Language: Английский

Citations

432
Recent Progress of Chiral Perovskites: Materials, Synthesis, and Properties DOI
Jiaqi Ma, Haizhen Wang, Dehui Li

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(26)

Published: May 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.

Language: Английский

Citations

217
Recent Progress on Electrical and Optical Manipulations of Perovskite Photodetectors DOI Creative Commons
Fang Wang, Xuming Zou,

Mengjian Xu

et al.

Advanced Science, Journal Year: 2021, Volume and Issue: 8(14)

Published: May 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.

Language: Английский

Citations

215
Chiral Lead‐Free Hybrid Perovskites for Self‐Powered Circularly Polarized Light Detection DOI
Dong Li, Xitao Liu, Wentao Wu

et al.

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 60(15), P. 8415 - 8418

Published: Dec. 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.

Language: Английский

Citations

177
Intelligent infrared sensing enabled by tunable moiré quantum geometry DOI
Chao Ma, Shaofan Yuan,

Patrick Cheung

et al.

Nature, Journal Year: 2022, Volume and Issue: 604(7905), P. 266 - 272

Published: April 13, 2022

Language: Английский

Citations

147
Chiral Induced Spin Selectivity DOI Creative Commons
Brian P. Bloom, Yossi Paltiel, Ron Naaman

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(4), P. 1950 - 1991

Published: Feb. 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.

Language: Английский

Citations

121
Realization of vis–NIR Dual-Modal Circularly Polarized Light Detection in Chiral Perovskite Bulk Crystals DOI
Yu Peng, Xitao Liu, Lina Li

et al.

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(35), P. 14077 - 14082

Published: Aug. 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.

Language: Английский

Citations

114
Control of light, spin and charge with chiral metal halide semiconductors DOI
Haipeng Lu, Z. Valy Vardeny, Matthew C. Beard

et al.

Nature Reviews Chemistry, Journal Year: 2022, Volume and Issue: 6(7), P. 470 - 485

Published: June 27, 2022

Language: Английский

Citations

112
Strong Second- and Third-Harmonic Generation in 1D Chiral Hybrid Bismuth Halides DOI
Yao Li,

Zhouxiaosong Zeng,

Chengkun Cai

et al.

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(39), P. 16095 - 16104

Published: Sept. 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.

Language: Английский

Citations

106
Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes DOI

Chuying Ye,

Jiawei Jiang,

Shaolan Zou

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(22), P. 9707 - 9714

Published: May 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.

Language: Английский

Citations

104