Highly Efficient Spin‐Filtering Transport in Chiral Hybrid Copper Halides

Lü, Ying; Wang, Qian; He, Rui‐Lin; Zhou, Feichi; Xia, Yang; Wang, Dong; Cao, Hui; He, Wanli; Pan, Feng; Zhou, Yang; Song, Cheng

doi:10.1002/anie.202109595

Cited by 55 publications

(79 citation statements)

References 49 publications

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“…Photovoltage response under the different polarization angles is shown in Figure a, in which no mirror plane with 90° rotation angle is observed, suggesting that the chiroptical activity of the ( R -BPEA)PbI 4 single crystal has been successfully transferred to the heterostructure with its constituents . Recent mCP-AFM and MR studies reveal that the CMHP can act as spin filters; , and such a chirality transfer is a consequence of the selective spin-polarized carrier transport between the chiral 2D ( R -BPEA)PbI 4 crystal and 3D MAPbI 3 . , When the CPL irradiates at the heterostructures, a large numbers of electron–hole pairs are generated in the 3D MAPbI 3 . Although the MAPbI 3 is achiral, it can generate spin carriers that depend on the light helicity, owing to the Rashba splitting in its band structure (Figure S11).…”

Section: Resultsmentioning

confidence: 99%

Direct Detection of Near-Infrared Circularly Polarized Light via Precisely Designed Chiral Perovskite Heterostructures

Zhang

Huang

Liang

et al. 2022

ACS Appl. Mater. Interfaces

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Chiral metal halide perovskites (CMHPs) have recently shown great potential for direct circularly polarized light (CPL) detection. However, owing to the limited cutoff wavelength edge of these CMHPs, most of the detectors presented thus far are characterized only in the ultraviolet and visible range; CMHPs that target at the near-infrared (NIR) region are still greatly desired. Here, we design a novel CMHP heterostructure, synthesized via solution-processed epitaxial growth of crystalline 3D MAPbI3 on a 2D chiral (R-BPEA)2PbI4 (R-BPEA = (R)-1-(4-bromophenyl)ethylammonium) crystal, and provide the first demonstration of self-powered direct NIR-CPL detection. Compared with individual chiral (R-BPEA)2PbI4, the heterostructure not only retains the spin selectivity but also allows much broader absorbance, especially beyond 780 nm, where the (R-BPEA)2PbI4 cannot absorb. Furthermore, the built-in electric potential in the heterojunction forces spontaneous separation/transport of photogenerated carriers, enabling the fabrication of devices operating without external energy supply. By making use of the abovementioned advantages, the self-powered CPL detectors of the (R-BPEA)2PbI4/MAPbI3 heterostructures hence show competitive circular polarization sensitivity at 785 nm with a high anisotropy factor of up to 0.25. In addition, a large on/off switching ratio of ∼105 and an impressive detectivity of ∼1010 Jones are also achieved. As a pioneer study, our results may broaden the material scope for future chiroptical devices based on CMHPs.

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Section: Resultsmentioning

confidence: 99%

Direct Detection of Near-Infrared Circularly Polarized Light via Precisely Designed Chiral Perovskite Heterostructures

Zhang

Huang

Liang

et al. 2022

ACS Appl. Mater. Interfaces

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“…43 The P s of (R/S-MBA)CuX 4 (X ¼ Cl, Br) of the 0D clusters is above 90% under À2 V bias. 65 Additionally, characterizing the CISS effect by the magnetooptical Kerr effect can also be studied, 66 and the accumulation of spin charges was measured by using the magneto-optical Kerr angle, which also conrmed the spin polarization of charges in the CMHS.…”

Section: Optical and Electrical Propertiesmentioning

confidence: 99%

Spin-polarized excitons and charge carriers in chiral metal halide semiconductors

et al. 2022

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“…A recent report utilizing the same chiral cation and Cu(II) with Cl and Br has described the CISS (chiral-induced spin selectivity) effect, which was first demonstrated by Beard and co-workers in layered lead- and tin-based halide perovskites. , Luther, Beard, and co-workers subsequently applied the CISS effect to produce spin-polarized LEDs, where spin-polarized carriers could be generated without magnetic fields or ferromagnetic contacts …”

Section: Ferroelectric and Spintronic Propertiesmentioning

confidence: 99%

The Renaissance of Functional Hybrid Transition-Metal Halides

et al. 2022

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Metrics & More Article RecommendationsCONSPECTUS: There is an extensive history of research on both inorganic and hybrid metal halides, with the latter being first reported in the 1960s. Although work on hybrid systems has progressed steadily over the last 60 years, it has enjoyed a major renaissance during the last 5 years. This has arisen as a consequence of the 2009 discovery of the outstanding optoelectronic properties of hybrid lead halides, such as (MA)PbI 3 (MA = methylammonium), and the recognition that there are many opportunities for equally exciting discoveries with compounds of the transition metals. Some of the early work on hybrid transition-metal halides put more emphasis on crystal structures but less on properties. In the modern era, we aim to grasp both the structure and properties, with a new twist. In this Account, we shall explore the recent developments in hybrid transition-metal halides with a focus on work in four main areas: magnetism, photoluminescence, semiconductivity, and spintronics. Our work on magnetism centers on the Ru-based hybrid halides, where the structural types are diversely composed of vacancy-ordered double perovskite, as well as chain-like one-dimensional structures and layered double perovskite (LDP) when paired with a (1+) metal. We explore their magnetic properties and find that their spin−orbit coupling (SOC) behavior can be tuned through changing the A cation and the halide. In the luminescence section, we focus on our recent works on hybrid tetrahedral Mn(II) bromides and Cu(I) and Ag(I) iodides. We correlated our newly discovered 0D A m MnBr 4 (A = organic cation, m = 1 or 2) compounds with previous reports, and generated a trend where the photoluminescence quantum yield (PLQY) increases with larger Mn−Mn distances. The flexible organic cation becomes the most important tool here to tune the structure−PLQY relations. Cu(I) and Ag(I) iodides coordinated with iodides and organic ligands produce new crystal structures with intense PL. For the semiconducting properties, we explore the Pt-based vacancy-ordered double perovskite and hybrid bismuth and indium-based LDPs to show the structural evolution with different choices for the organic cation, the metal and the halide; these have a strong influence on the optical properties. The LDPs specifically exhibit high structure tunability, with a wide range of (1+) and (3+) metal choices, and are exempt from some of the limitations of 3D double perovskite. In the last section, we introduce the recent progress on hybrid transition-metal-based ferroelectrics and spintronic materials. We successfully demonstrate the utilization of chiral Cu(II) chlorides for circularly polarized light (CPL) detection, showing the high anisotropy of the photoresponsivity. We also highlight the work that the authors have contributed in these areas and suggest several exciting opportunities for future developments.

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Highly Efficient Spin‐Filtering Transport in Chiral Hybrid Copper Halides

Cited by 55 publications

References 49 publications

Direct Detection of Near-Infrared Circularly Polarized Light via Precisely Designed Chiral Perovskite Heterostructures

Direct Detection of Near-Infrared Circularly Polarized Light via Precisely Designed Chiral Perovskite Heterostructures

Spin-polarized excitons and charge carriers in chiral metal halide semiconductors

The Renaissance of Functional Hybrid Transition-Metal Halides

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