ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2906 - 2912
Опубликована: Май 21, 2025
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Янв. 8, 2025
Two-dimensional (2D) organic–inorganic hybrid metal halides (OIMHs), characterized by noncentrosymmetric structures arising from the incorporation of chiral organic molecules that break inversion symmetry, have attracted significant attention. Particularly, chiral-polar 2D OIMHs offer a unique platform for multifunctional applications, as coexistence chirality and polarity enables simultaneous manifestation distinct properties such nonlinear optical (NLO) effects, circular dichroism (CD), ferroelectricity. In this study, we report first synthesis hafnium (Hf)-based OIMHs, achieved through strategic para-substituents on benzene ring components. By tuning substituents, successfully modulate crystal structures, resulting in both chiral-nonpolar systems. Our analysis structural properties, supported density functional theory calculations, demonstrates these materials can be systematically tuned, enabling adjustable band gaps CD UV range (200–280 nm). Notably, halogen substitution at para-position layer produces tunable ranging 4.33 to 4.48 eV, widest reported date OIMHs. Furthermore, exhibit enhanced NLO including remarkable 3.3-fold increase second-harmonic generation intensity compounds compared their counterparts. These findings position Hf-based promising candidates UV-region devices self-driven circularly polarized light detectors, offering new opportunities designing optoelectronic harnessing interplay between polarity.
Язык: Английский
Процитировано
7
ACS Nano, Год журнала: 2024, Номер unknown
Опубликована: Дек. 18, 2024
2D Ruddlesden-Popper (RP) perovskites, upon inclusion of a chiral amine, exhibit chirality-induced spin selectivity (CISS). Although alloying at the halogen site in MBA-based RPs (MBA: methylbenzylammonium) is one suitable routes to tune CISS effect, mixed-halide RP perovskites exhibited complete suppression chirality when probed through circular dichroism (CD). Here, we present effect series perovskites. We show that photoinduced halide segregation origin for apparent suppression. The spin-dependent charge transport was evidenced magnetic-conducting atomic force microscopy (mc-AFM) studies and magnetoresistance (MR) measurements. mc-AFM results (
Язык: Английский
Процитировано
4
Advanced Physics Research, Год журнала: 2025, Номер unknown
Опубликована: Янв. 7, 2025
Abstract Chiral hybrid organic‐inorganic perovskites (HOIPs) have emerged as promising materials for optoelectronic and spintronic applications, leveraging unique properties such circularly polarized luminescence (CPL), nonlinear optical (NLO) emission, chiral‐induced spin selectivity (CISS). However, challenges remain in stabilizing these under environmental stresses precisely controlling chirality scalable use. This review summarizes five main strategies to induce HOIPs, i.e., direct incorporation of chiral cations, surface modification with ligands, ion doping, template‐induced chirality, metasurfaces. Each approach offers distinct advantages optimizing CPL efficiency device stability, paving the way next‐generation applications detectors, information encryption, devices, etc.
Язык: Английский
Процитировано
0
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 19, 2025
Abstract Polarization is an important property of light that provides some additional information about the such as polarizability and phase. With rise polarized photodetectors, detection may bring a new way to better understand information. Recent works have shown polarization detectors demonstrated excellent potential in field neuromorphology, which great significance for further development artificial intelligence. This review comprehensively summarizes present research status detectors, including linearly (LPPDs) circularly (CPPDs). In order assess current state detecting linearly/circularly light, operating principles performance parameters are presented. Next, universal semiconductors used LPPDs CPPDs systematically classified summarized. Based on this, applications fields intelligence, imaging, digital signal processing then reviewed. Finally, challenging opportunities discussed, followed by overview future prospects this promising field.
Язык: Английский
Процитировано
0
Nanoscale, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
This study examines the early-stage nucleation of chiral perovskites, uncovering a stepwise kinetic mechanism across timescales from picoseconds to microseconds.
Язык: Английский
Процитировано
0
Small Science, Год журнала: 2025, Номер unknown
Опубликована: Май 15, 2025
Chiral halide perovskites have attracted considerable attention due to their intrinsic chirality‐induced circular dichroism (CD), circularly polarized luminescence (CPL), and spin selectivity. However, chiroptical activities of low‐dimensional lead‐free chiral are hardly observed, especially for those with white‐light emission. Herein, different ratios 0D Cs 3 Cu 2 I 5 1D CsCu realized. Chiroptical introduced into these films by post‐treatment r‐/s‐methylbenzylammonium iodide realize perovskites. The absorption, photoluminescence, photoluminescence excitation, CD, CPL spectra investigated. Commission Internationale de L’Eclairage chromaticity coordinates (0.33, 0.33) obtained when the excitation wavelength is 300 nm. Large Stokes shifts broadband emission observed attributed presence self‐trapped excitons. At room temperature, CD signals without application an external magnetic field, indicating chirality in Room‐temperature also from perovskites, but only component. This fact that does not produce spin‐polarized excitons do transfer .
Язык: Английский
Процитировано
0
ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2906 - 2912
Опубликована: Май 21, 2025
Процитировано
0