Molecular templating of layered halide perovskite nanowires

Science, Journal Year: 2024, Volume and Issue: 384(6699), P. 1000 - 1006

Published: May 30, 2024

Layered metal-halide perovskites, or two-dimensional can be synthesized in solution, and their optical electronic properties tuned by changing composition. We report a molecular templating method that restricted crystal growth along all crystallographic directions except for [110] promoted one-dimensional growth. Our approach is widely applicable to synthesize range of high-quality layered perovskite nanowires with large aspect ratios tunable organic-inorganic chemical compositions. These form exceptionally well-defined flexible cavities exhibited wide unusual beyond those conventional nanowires. observed anisotropic emission polarization, low-loss waveguiding (below 3 decibels per millimeter), efficient low-threshold light amplification 20 microjoules square centimeter).

Language: Английский

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2D Conjugated Metal–Organic Framework‐Based Composite Membranes for Nanofluidic Ionic Photoelectric Conversion

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Nanofluidic photoelectric conversion system based on photo‐excitable 2D materials can directly transduce light stimuli into an ion‐transport‐mediated electric signal, showing potential for mimicking the retina's function with a more favorable human–robot interactions. However, current membranes suffer from low generation efficiency of charge carriers due to mixed microstructure and limited transport ability caused by large interlayer spacing monotonous pathway. Here, fully conjugated hexaimino‐substituted triphenylene‐based metal–organic framework (2D‐HATP‐cMOF) composite membrane high conductivity is presented. The extended π‐d conjugation within ab plane pathway through π–π stacking c‐MOF maximize transfer carrier greatly accelerate ion transport. As result, 2D‐HATP‐cMOF‐based possesses ultrafast response, superior other reported systems like graphene oxide (GO), transition metal carbides, carbonitrides nitrides (MXene), MoS 2 , which require at least 10 s. A successful pump phenomenon, that active concentration as important way information transmission in organisms, realized efficient capability. This work demonstrates great promise ionic conversion.

Language: Английский

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Organic donor-acceptor heterojunctions for high performance circularly polarized light detection

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: June 15, 2022

Development of highly efficient and stable lateral organic circularly polarized light photodetector is a fundamental prerequisite for realization integrated applications. However, chiral semiconductors with helical structure are usually found intrinsically low field-effect mobilities, which becomes bottleneck high-performance multi-wavelength detection. To address this problem, here we demonstrate novel strategy to fabricate based on the donor-acceptor heterojunction, where exciton separation enables acceptor layer provide differentiated concentration holes channel transistors. Benefitting from defect density at semiconductor/dielectric interface, photodetectors exhibit excellent stability, enabling current roll-off about 3-4% over 500 cycles. The photocurrent dissymmetry value responsivity in air 0.24 0.28 A W-1, respectively. We further communication real-time detector by decoding signal. As proof-of-concept, results hold promise large-scale photonic

Language: Английский

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Chain-to-Layer Dimensionality Engineering of Chiral Hybrid Perovskites to Realize Passive Highly Circular-Polarization-Sensitive Photodetection

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(39), P. 18062 - 18068

Published: Sept. 23, 2022

Chiral hybrid perovskites (CHPs), aggregating chirality and favorable semiconducting properties in one, have taken a prominent position direct circularly polarized light detection (CPL). However, passive high circular polarization sensitivity (gres) photodetection CHPs is still elusive challenging. Benefitting from efficient control turning of carrier transport by dimensional engineering, here, we unprecedentedly proposed chain-to-layer dimensionality engineering to realize high-gres photodetection. Two novel 2D layered (R/S-PPA)EAPbBr4 (2R/2S) (PPA = 1-phenylpropylamine, EA ethylammonium) are successfully synthesized alloying an cation with small steric hindrance into the chained (R/S-PPA)PbBr3 (1R/1S). Particularly, compared neglectable photoresponse 1R, obtained 2R gives rise excellent photoconductivity robust polar photovoltage effect (PPE) giant open-circuit voltage 2.5 V. Furthermore, such PPE promotes realizing impressive gres up 0.42 at zero bias because independent separation photoexcited carriers, which highest value among reported chiral perovskites. This work paves way for vigorous development higher will reveal their applications field CPL detection.

Language: Английский

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Emerging materials for circularly polarized light detection

Journal of Materials Chemistry C, Journal Year: 2021, Volume and Issue: 10(7), P. 2400 - 2410

Published: Oct. 27, 2021

Detecting circularly polarized light is central to many advanced sensing technologies. We summarize the recent progress on chiral materials developed for CPL detection and provide perspectives strategies improve dissymmetry factors.

Language: Английский

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Circularly Polarized Photodetectors Based on Chiral Materials: A Review

Frontiers in Chemistry, Journal Year: 2021, Volume and Issue: 9

Published: Sept. 8, 2021

Circularly polarized light (CPL) plays an important role in many photonic techniques, including tomographic scanning based on circular polarization ellipsometry, optical communication and information of spin, quantum-based calculation processing. To fully exploit the functions CPL these fields, integrated photoelectric sensors capable detecting are essential. Photodetectors chiral materials can directly detect due to their intrinsic activity, without need be coupled with polarizers quarter-wave plates as conventional photodetectors. This review summarizes recent research progress photodetectors materials. We first briefly introduce different types working principles. Finally, current challenges future opportunities development prospected.

Language: Английский

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Polymer‐Assisted Crystal Growth Regulation and Defect Passivation for Efficient Perovskite Light‐Emitting Diodes

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(34)

Published: June 14, 2022

Abstract Perovskite light‐emitting diodes (Pero‐LEDs) with external quantum efficiencies (EQEs) of over 20% have been achieved in the last several years. However, reproducibility such high‐efficiency Pero‐LEDs is still low. The perovskite film quality, especially for non‐radiative defects, crucial determining device performance. These defects may lie bulk grains, grain boundaries, and interfaces as‐formed films. Here, a polymer infiltrative treatment method developed to realize effective universal defect passivation. Specifically, poly(vinylidene fluoride) (PVDF) chains are blended into films before they fully crystallizing. This can regulate crystallization passivate through chemical interactions lattices PVDF. As result, high‐quality void‐free surfaces few‐defect crystals obtianed. corresponding show maximum EQE 22.29% an average 20.44 ± 0.73% based on statistical analysis 50 devices, exhibiting excellent reproducibility. work provides better insights controlling crystal growth passivation via polymer‐assisted methods efficient Pero‐LEDs.

Language: Английский

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Ultrasensitive Near‐Infrared Circularly Polarized Light Detection Using 3D Perovskite Embedded with Chiral Plasmonic Nanoparticles

Advanced Science, Journal Year: 2022, Volume and Issue: 9(5)

Published: Jan. 2, 2022

Chiral organic ligand-incorporated low-dimensional metal-halide perovskites have received increasing attention for next-generation photodetectors because of the direct detection capability circularly polarized light (CPL), which overcomes requirement subsidiary optical components in conventional CPL photodetectors. However, most chiral been based on structures that confine chiroptical responses to ultraviolet (UV) or short-wavelength visible region and limit photocurrent due their wide bandgap poor charge transport. Here, properties 3D Cs

Language: Английский

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Tailoring the Distinctive Chiral‐Polar Perovskites with Alternating Cations in the Interlayer Space for Self‐Driven Circularly Polarized Light Detection

Advanced Optical Materials, Journal Year: 2022, Volume and Issue: 10(18)

Published: July 3, 2022

Abstract Chiral hybrid perovskites are recently considered for circularly polarized light (CPL) detection owing to the integration of chiral activity and prominent photoelectric characteristics. However, limited because restricted cations; efficient self‐driven CPL without external power sources required halide perovskite photodetectors is desirable but remains scarce. Herein, two alternating cations in interlayer space chiral‐polar perovskites, ( R ‐β‐MPA)EAPbBr 4 S (MPA = methylphenethylammonium EA ethylammonium), developed via a mixed‐cation approach. These exhibit characteristics featuring with high detectivity. Notably, structure gives rise built‐in electric field realize an applied voltage, photocurrent difference reaches 19% under right left irradiation. Moreover, response time 300 µs obtained, which among fastest detection. This work highlights significance chemical design exploration new will broaden scope materials high‐performance applications.

Language: Английский

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Highly Anisotropic Second-Order Nonlinear Optical Effects in the Chiral Lead-Free Perovskite Spiral Microplates

Nano Letters, Journal Year: 2023, Volume and Issue: 23(2), P. 606 - 613

Published: Jan. 9, 2023

Chiral metal halide perovskites with intrinsic asymmetric structures have drawn increased research interest for the application of second-order nonlinear optics (NLO). However, designing chiral features a large NLO coefficient, high laser-induced damage thresholds (LDT), and environmental friendliness remains major challenge. Herein, we synthesized two hybrid bismuth halides: (R/S-MBA)4Bi2Br10 spiral structure microplates, templated by (R/S)-methylbenzylamine (R/S-MBA). The as-grown lead-free perovskite microplates exhibit recorded second harmonic generation (SHG) effect effective coefficient (deff) 11.9 pm V-1 LDT up to 59.2 mJ cm-2. More importantly, twisted screw show competitive circular polarization sensitivity at 1200 nm an anisotropy factor (gSHG-CD) 0.58, which is about 3 times higher than that reported Pb-based perovskites. These findings provide new platform design multifunctional photonic applications.

Language: Английский

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