Manipulation of Valley Pseudospin by Selective Spin Injection in Chiral Two-Dimensional Perovskite/Monolayer Transition Metal Dichalcogenide Heterostructures

Chen, Yingying; Ma, Jiaqi; Liu, Zeyi; Li, Junze; Duan, Xiangfeng; Li, Dehui

doi:10.1021/acsnano.0c05343

Cited by 52 publications

(80 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure a shows the SC of [( R )‐MPA] 2 PbCl 4 /Si photodetector under different polarization angle, where no mirror plane with 180° rotation angle is observed, experimentally suggesting the chirality of chiral [( R )‐MPA] 2 PbCl 4 has been successfully transferred to the heterostructure of which it constitutes. [ 42–44 ] This chirality transfer may originate from the selective spin‐polarized carrier transport from [( R )‐MPA] 2 PbCl 4 to adjacent Si, according to the recent mCP‐AFM and MR studies. [ 13,14,42 ] Based on the data from previous reports and ultraviolet photoelectron spectroscopy (UPS) studies (Figure S13, Supporting Information), [ 32 ] energy band diagram of the [( R )‐MPA] 2 PbCl 4 /Si heterostructure is shown in Figure 4b.…”

Section: Resultsmentioning

confidence: 99%

Heterogeneous Integration of Chiral Lead–Chloride Perovskite Crystals with Si Wafer for Boosted Circularly Polarized Light Detection in Solar‐Blind Ultraviolet Region

Zhang

Weng

et al. 2021

Small

View full text Add to dashboard Cite

source in quantum optics, magnetic memory devices, and high-definition imaging. [4][5][6][7] For those CPL-based devices it is necessary to distinguish between two polarization states of CPL, that is, to establish sensitive CPL detectors. Different from the indirect method of detecting CPL, chiral material can enable direct CPL detectors without the assistance of optical elements, meeting the demands for integrated and flexible devices.One of the grand challenges for direct CPL detectors is seeking suitable chiral materials with excellent semiconductor properties and strong chiroptical activity. [8] In this regard, chiral hybrid organic-inorganic perovskites (HOIPs) are especially promising. [9] They are typically formed with nanometer-thick inorganic [PbX 6 ] 4− (X = Cl, Br, I) octahedral framework and separated one from another by barriers of chiral organic ligands. [10][11][12] This structural feature can induce chirality into inorganic sublattice band edge states, allowing efficient charge transport and at the same time, chiroptical activity of these hybrid materials. [13][14][15][16][17] So far, prominent CPL photodetectors based on chiral HOIPs have been achieved (e.g., [(R)-NEA]PbI 3 , [(R)-MPA] 2 MAPb 2 I 7 , [(R)-/(S)-MBA]PbI 4 , and [(R)-/(S)-PEA]PbI 3 ), fully revealing their promise in this field. [18][19][20][21][22] Despite such an advance, however, those presented devices are characterized only at wavelengths in visible bands and typically achieve anisotropy factor of less than 0.2. Sensitive chiral HOIP detectors that target Chiral hybrid organic-inorganic perovskites (HOIPs) have been well developed for circularly polarized light (CPL) detection, while new members that target at solar-blind ultraviolet (UV) region remain completely unexplored.Here, an effective design strategy to demonstrate circular polarization-sensitive solar-blind UV photodetection by growing wide-bandgap chiral HOIP [(R)-MPA] 2 PbCl 4 ((R)-MPA = methylphenethylammonium) single crystals onto silicon wafers, with well-defined heterostructures, is reported. The solid mechanical and electrical connection between the chiral HOIP and silicon wafer results in strong built-in electric field at heterojunction, providing a desirable driving force for separating/transporting carriers generated under CPL excitation at 266 nm. Unexpectedly, during such a transport process, not only the chirality of HOIP crystal is transferred to the heterostructure, but also the circular polarization sensitivity is significantly amplified. Consequently, anisotropy factor of the resultant detectors can reach up to 0.4 at zero bias, which is much higher than that of the pristine single-phase chiral HOIP (≈0.1), reaching the highest among the reported CPL-UV photodetectors. As far as we know, the integration of chiral HOIP crystals with silicon technology is unprecedent, which paves a way for designing boosted-performance CPL detectors in solar-blind UV region as well as for other advanced optoelectronic devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Heterogeneous Integration of Chiral Lead–Chloride Perovskite Crystals with Si Wafer for Boosted Circularly Polarized Light Detection in Solar‐Blind Ultraviolet Region

Zhang

Weng

et al. 2021

Small

View full text Add to dashboard Cite

show abstract

“…A straightforward method of manipulating the valley polarization of monolayer TMDs in chiral 2D perovskite/monolayer TMD heterostructures has recently been reported. [ 28 ] An average spin‐injection efficiency of 78% and an average valley polarization surpassing 10% in chiral 2D perovskite/monolayer TMD heterostructures were obtained at 78 K with no external magnetic field. Moreover, the robust circular polarization of interlayer exciton emissions in chiral 2D perovskite/monolayer WSe 2 heterostructures suggests the possibility of manipulating the valley degree‐of‐freedom.…”

Section: Discussionmentioning

confidence: 99%

Recent Progress of Chiral Perovskites: Materials, Synthesis, and Properties

2021

Self Cite

View full text Add to dashboard Cite

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 and electrical properties, which are particularly suitable for realizing high power‐conversion efficiency in solar cells. Recent studies have shown that chirality can be transferred from chiral organic ligands into halide perovskites and the resultant chiral perovskites combine the advantages of both chiral materials and halide perovskites; this provides an ideal platform to design next‐generation optoelectronic and spintronic devices. In this progress report, the most recent advances are summarized in various chemical structures of chiral perovskites, their synthesis strategies, chirality generation mechanisms, and physical properties. Furthermore, the potential chiral‐halide‐perovskite‐based applications are presented and the challenges and prospects of chiral perovskites are discussed. This report outlines the diverse construction strategies of and proposes research directions for chiral halide perovskites; thus, it provides insights into the design of novel chiral perovskites and facilitates investigation of the optoelectronic applications that employ chirality.

show abstract

“…So far, many types of 2D materials have been fabricated into chiral ones, including the 2D perovskites 302,[663][664][665][666][667][668][669][670] , graphene [671][672][673] , TMDs [674][675][676][677] , 2D organic nanoassemblies 678 and many more. A key scientific issue is how the chirality is originated and how to endow the 2D materials with chirality.…”

Section: General Concepts Of 2d Chiralitymentioning

confidence: 99%

“…It had been verified that spin-related CPL emission could be modulated by magnetic field 706 and the CISS effect can directly control spin-polarized properties in chiral perovskites, which are essential for chiral spintronic applications 666,719 . Furthermore, the high spin polarizations enable chiral perovskites to manipulate the valley polarization (average valley polarization surpassing 10%) of monolayer TMDs in chiral 2D perovskite/monolayer TMD heterostructures via efficient spin injection (average spininjection efficiency of 78%) without external magnetic fields 663,670 . In addition, regulating spin injection in chiral perovskites/ monolayer TMD heterostructures by applying an external electric and magnetic fields would be expected to greatly promote the development of chiral perovskite-based spintronic and valleytronic devices.…”

Section: Chiral 2d Perovskitesmentioning

confidence: 99%

Recent Progress on Two-Dimensional Materials

Chang¹,

Chen²,

Chen³

et al. 2021

Acta Physico Chimica Sinica

Self Cite

295

119

View full text Add to dashboard Cite

Research on two-dimensional (2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications.In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief background 物理化学学报 Acta Phys. -Chim. Sin. 2021, 37 (12), 2108017 (3 of 151) introduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials (PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

show abstract

Manipulation of Valley Pseudospin by Selective Spin Injection in Chiral Two-Dimensional Perovskite/Monolayer Transition Metal Dichalcogenide Heterostructures

Cited by 52 publications

References 55 publications

Heterogeneous Integration of Chiral Lead–Chloride Perovskite Crystals with Si Wafer for Boosted Circularly Polarized Light Detection in Solar‐Blind Ultraviolet Region

Heterogeneous Integration of Chiral Lead–Chloride Perovskite Crystals with Si Wafer for Boosted Circularly Polarized Light Detection in Solar‐Blind Ultraviolet Region

Recent Progress of Chiral Perovskites: Materials, Synthesis, and Properties

Recent Progress on Two-Dimensional Materials

Contact Info

Product

Resources

About