Ligand Chemistry of Inorganic Lead Halide Perovskite Nanocrystals

ACS Energy Letters, Год журнала: 2023, Номер 8(2), С. 1152 - 1191

Опубликована: Янв. 26, 2023

Lead halide perovskite nanocrystals (LHP NCs) have emerged as next-generation semiconductor materials with outstanding optical and optoelectronic properties. Because of the high surface-to-volume ratio, performance colloidal stability LHP NCs largely depend on their surface chemistry, especially ligands termination. On one hand, capping improve luminescence; other hand highly dynamic binding nature is detrimental to photoluminescence NCs. In addition, functionalization desired molecules induces new functionalities such chirality, light harvesting, triplet sensitization through energy/electron transfer or use X-ray detectors. this review, we present current understanding an atomic view chemistry NCs, including crystal termination, vacancies, different types ligands. Furthermore, discuss ligand-induced functionalities, photocatalysis chirality.

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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Chiral materials and mechanisms for circularly polarized light-emitting diodes

Nature Photonics, Год журнала: 2024, Номер 18(7), С. 658 - 668

Опубликована: Март 25, 2024

Язык: Английский

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Spin selection in atomic-level chiral metal oxide for photocatalysis

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Июль 28, 2023

Abstract The spin degree of freedom is an important and intrinsic parameter in boosting carrier dynamics surface reaction kinetics photocatalysis. Here we show that chiral structure ZnO can induce selectivity effect to promote photocatalytic performance. crystals synthesized using methionine molecules as symmetry-breaking agents hierarchical chirality. Magnetic circular dichroism spectroscopic magnetic conductive-probe atomic force microscopic measurements demonstrate acts filters induces polarization photoinduced carriers. polarized carriers not only possess the prolonged lifetime, but also increase triplet species instead singlet byproducts during reaction. Accordingly, left- right-hand exhibit 2.0- 1.9-times higher activity O 2 production 2.5- 2.0-times activities contaminant photodegradation, respectively, compared with achiral ZnO. This work provides a feasible strategy manipulate properties metal oxides for electron spin-related redox catalysis.

Язык: Английский

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Circular polarization-resolved ultraviolet photonic artificial synapse based on chiral perovskite

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Ноя. 7, 2023

Abstract Circularly polarized light (CPL) adds a unique dimension to optical information processing and communication. Integrating CPL sensitivity with learning memory in photonic artificial synapse (PAS) device holds significant value for advanced neuromorphic vision systems. However, the development of such systems has been impeded by scarcity suitable active optoelectronic materials. In this work, we employ helical chiral perovskite hybrid combined single-wall carbon nanotubes achieve circularly ultraviolet sensing imaging. The heterostructure demonstrates long-term charge storage as evidenced multiple-pulsed transient absorption measurements highly sensitive circular polarization-dependent photodetection, thereby enabling efficient CPL-resolved synaptic behaviors. Significantly, our PAS sensor arrays adeptly visualize, discriminate, memorize distinct images up 93% recognition accuracy spiking neural network simulations. These findings underscore pivotal role perovskites advancing technology polarization-enhanced

Язык: Английский

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Chiral Hybrid Germanium(II) Halide with Strong Nonlinear Chiroptical Properties

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(41)

Опубликована: Авг. 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.

Язык: Английский

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Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Фев. 7, 2024

Lanthanide-doped fluoride nanoparticles (NPs) showcase adjustable X-ray-excited persistent luminescence (XEPL), holding significant promise for applications in three-dimensional (3D) imaging through the creation of flexible X-ray detectors. However, a dangerous high irradiation dose rate and complicated heating procedure are required to generate efficient XEPL high-resolution 3D imaging, which is attributed lack strategies significantly enhance intensity. Here we report that intensity series lanthanide activators (Dy, Pr, Er, Tm, Gd, Tb) greatly improved by constructing dual heterogeneous interfaces double-shell nanostructure. Mechanistic studies indicate employed core@shell@shell structure could not only passivate surface quenchers lower non-radiative relaxation possibility, but also reduce interfacial Frenkel defect formation energy leading increase trap concentration. By employing NPs containing film as scintillation screen, inside electrical watch was clearly achieved based on delayed reconstruction procedure. We foresee these findings will promote development advanced activated offer opportunities safer more techniques number scientific practical areas.

Язык: Английский

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Spintronic Phenomena and Applications in Hybrid Organic–Inorganic Perovskites

Advanced Functional Materials, Год журнала: 2024, Номер 34(27)

Опубликована: Март 1, 2024

Abstract The spin degree of freedom in hybrid organic–inorganic perovskites (HOIPs) has become a rapidly growing research topic both HOIPs and spintronics fields due to its fundamental scientific significance tight relevance with optoelectronics. flourishing achievements HOIP call for timely review summarize the key progress guide future developments. In this review, classical spintronic phenomena based on spin‐orbit coupling (SOC) are discussed, especially Rashba splitting related applications such as spin‐charge conversion. Owing unique chirality‐spin coupling, chiral particularly focused on, including chirality‐induced selectivity (CISS). Based complex band structure carrier/exciton, dynamics is also widely investigated constitutes an indispensable part spintronics. Aside from three main threads, other magneto‐optical device exploration involved promising opportunities. Despite continuous breakthroughs spintronics, more efforts required expand material systems, explore new physics, optimize configurations enhanced performance high integration. A deep understanding behaviors will create platform beyond conventional optoelectronic photovoltaic applications.

Язык: Английский

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Room-temperature spin injection across a chiral perovskite/III–V interface

Nature, Год журнала: 2024, Номер 631(8020), С. 307 - 312

Опубликована: Июнь 19, 2024

Язык: Английский

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Rapid room-temperature phosphorescence chiral recognition of natural amino acids

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 17, 2024

Abstract Chiral recognition of amino acids is very important in both chemical and life sciences. Although chiral with luminescence has many advantages such as being inexpensive, it usually slow lacks generality the module relies on structural complementarity. Here, we show that one single molecular-solid sensor, L-phenylalanine derived benzamide, can manifest difference between natural, left-handed acid its right-handed counterpart via room-temperature phosphorescence (RTP) irrespective specific structure. To realize rapid reliable sensing, doped samples are obtained nanocrystals from evaporation tetrahydrofuran solutions, which allows for efficient triplet-triplet energy transfer to analytes generated situ acids. The results L-analytes induce strong RTP, whereas unnatural D-analytes produce barely any afterglow. method expands scope sensing by lessening requirement molecular structures.

Язык: Английский

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