Spin‐Dependent Charge Transport in 1D Chiral Hybrid Lead‐Bromide Perovskite with High Stability

Spin‐dependent charge transport, along with the potential electronic applications, is investigated in chiral 2D iodide hybrid organic/inorganic perovskites (HOIPs) via the chirality‐induced spin selectivity (CISS) effect, paving a new way in spintronics. Despite the high spin‐polarized current enhan...

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Bibliographic Details
Published in:Advanced functional materials 2021-10, Vol.31 (43), p.n/a
Main Authors: Lu, Ying, Wang, Qian, Chen, Ruyi, Qiao, Leilei, Zhou, Foxin, Yang, Xia, Wang, Dong, Cao, Hui, He, Wanli, Pan, Feng, Yang, Zhou, Song, Cheng
Format: Article
Language:English
Subjects:
Atomic force microscopy
Charge transport
Chirality
chirality‐induced spin selectivity
Crystals
Electron spin
Electronic devices
high stability
lead‐bromide perovskites
Materials science
Oxidation
Perovskites
Selectivity
Service life assessment
Spintronics
spin‐dependent charge transport
Stability
Transport properties
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Summary:Spin‐dependent charge transport, along with the potential electronic applications, is investigated in chiral 2D iodide hybrid organic/inorganic perovskites (HOIPs) via the chirality‐induced spin selectivity (CISS) effect, paving a new way in spintronics. Despite the high spin‐polarized current enhancement, the intrinsic oxidation tendency of iodide ions brings about severe problems in the stability and lifetime of electronic devices. Here, spin‐dependent charge transport properties in lead‐bromide perovskites hybrid with chiral R/S‐methylbenzylammonium (MBA), that is, (R/S‐MBA)PbBr3 are explored. Distinct from layered 2D iodide perovskites (R/S‐MBA)2PbI4 which experience obvious crystal degradation along time, (R/S‐MBA)PbBr3 maintain good crystallinity even in the oxidative, humid, and high‐temperature environment due to the lower Fermi level of bromide than iodide. Magnetic conductive atomic force microscopy displays a spin filtration efficiency as high as 90%, showing negligible decay after 1 month. This work expands the spin transport to chiral bromide perovskites with higher stability, and thus provides significant support for the practical application of HOIPs in spintronics. Chirality‐induced spin selectivity in chiral hybrid organic/inorganic perovskites (HOIPs) mainly focuses on 2D Pb‐I systems previously, with the problem of intrinsic instability against oxidation. Spin‐dependent charge transport with high spin‐polarization (90%) is achieved in chiral PbBr HOIP with novel 1D PbBr6 octahedral framework in this work, and superior stability in ambient atmosphere is demonstrated.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202104605