Spin‐Polarized Electronic Transport through Ferromagnet/Organic–Inorganic Hybrid Perovskite Spinterfaces at Room Temperature

Wang, Kai; Qin, Yang; Duan, Jiashun; Zhang, Caixia; Zhao, Fei; Yu, Haomiao; Hu, Bin

doi:10.1002/admi.201900718

Cited by 22 publications

(19 citation statements)

References 43 publications

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“…Indeed, it has been previously shown that the interfacial properties differ from the bulk Ni film because of the changes of the magnetization, coercivity, and magnetic moment. [17] As it has been theoretically studied, the electronic structure of MAPbI 3 is mainly decided by − PbI 3 . If i-DOS are spin-dependent, photoexcited electrons near the band-edge of the valence band should be partially polarized due to the orbit hybridization/mixing effect.…”

Section: Discussionmentioning

confidence: 99%

“…[13,14] By far, spin related phenomena for OIHPs have been studied via measurements of magnetic field effects (MFEs) and spin-polarized electronic transport. [15][16][17][18][19] The formation of the ferromagnet/ perovskite spinterface such as Ni/MAPbI 3−x Cl x and Co/ MAPbI 3−x Cl x are known to have remarkable impact on magnetoresistance (MR) and magnetodielectric responses. [17,20] The hybrid interface can be also useful for generating spin-hall and inverse spin-hall effects.…”

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confidence: 99%

“…[15][16][17][18][19] The formation of the ferromagnet/ perovskite spinterface such as Ni/MAPbI 3−x Cl x and Co/ MAPbI 3−x Cl x are known to have remarkable impact on magnetoresistance (MR) and magnetodielectric responses. [17,20] The hybrid interface can be also useful for generating spin-hall and inverse spin-hall effects. [21,22] Indeed, the nonmagnetic OIHPs can produce intrinsic MFEs in forms of magnetophotocurrent (MPC) and magnetophotoluminescence (MPL) even at room temperature.…”

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confidence: 99%

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Spinterfaces Manipulate Large Magnetic Field Effects in 3D and Quasi‐2D Organic–Inorganic Hybrid Perovskites

Pan

Wang

et al. 2021

Adv Elect Materials

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Owing to the presence of heavy elements such as lead (Pb) and iodine (I) in lead halide perovskites, they are known to have relatively stronger spin-orbit coupling (SOC). [7] Electronic structures of OIHPs exhibit the nondegenerated energy splitting for conduction bands. The interior crystalline inversion symmetrybreaking field leads to the spin degeneracy in term of Rashba effect mainly for the conduction bands. [8,9] Their giant dielectric permittivities help to generate Wannier-Mott excitons with low binding energies ranging from 37 to 98 meV. [10] This causes efficient dissociation of exciton in several picoseconds at room temperature. At present, intensive studies are concerned with the electronic charge and ion transport behaviors for OIHPs. [11,12] In order to fully emerge their potentials, using spin as an information carrier/bit can be a promising field for future optospintronics, nano-, and quantum electronics. [13,14] By far, spin related phenomena for OIHPs have been studied via measurements of magnetic field effects (MFEs) and spin-polarized electronic transport. [15][16][17][18][19] The formation of the ferromagnet/ perovskite spinterface such as Ni/MAPbI 3−x Cl x and Co/ MAPbI 3−x Cl x are known to have remarkable impact on magnetoresistance (MR) and magnetodielectric responses. [17,20] The hybrid interface can be also useful for generating spin-hall and inverse spin-hall effects. [21,22] Indeed, the nonmagnetic OIHPs can produce intrinsic MFEs in forms of magnetophotocurrent (MPC) and magnetophotoluminescence (MPL) even at room temperature. [15,16] The effects usually do not require ferromagnets and stem from the disturbance of spin-statistics such as singlets and triplets. Importantly, they were applied for revealing the internal spin dynamics at excited states for OIHPbased solar cells and light emitting devices. [15,16,23,24] On the other hand, an intriguing question may arise, to which extend, MFEs can be affected by ferromagnetic electrodes and the ferromagnet/perovskite spinterfaces.Herein, we have fabricated prototypical perovskite spin valves (PeSVs) with vertical structures comprising Ni/MAPbI 3−x Cl x / Ni and Ni/(PEA) 2 (MA) 3 Pb 4 I 13 /Ni. Both MAPbI 3−x Cl x and (PEA) 2 (MA) 3 Pb 4 I 13 are chemically processed based on our early experiences. [25,26] It produces rational MR even at room temperature. The signal is highly determined by the magnetic coupling of the two spinterfaces. With the same spintronic device configuration, the magnetophotocurrent at the short circuit Spinterfaces are due to the orbital hybridization at an interface of a ferromagnet and a nonmagnetic semiconductor. Interfacial densities of states (i-DOS) are spin-dependent, which may offer the spin-filter effect for enhancing spin-polarized charge injection efficiency and magnetic field effects (MFEs). In the work, a prototypical perovskite spin valve (PeSV) comprising Ni/MAPbI 3−x Cl x /Ni (MA = CH 3 NH 3 ) is fabricated, showing a clear magnetic switching behavior in the ambient condition. It is further explored ...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Spinterfaces Manipulate Large Magnetic Field Effects in 3D and Quasi‐2D Organic–Inorganic Hybrid Perovskites

Pan

Wang

et al. 2021

Adv Elect Materials

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“…Following those two earliest studies, follow-up works have demonstrated various spin phenomena across different perovskite systems. Several works to be highlighted include experimental demonstration of quantum spin-beating [153,154], spin-selective optical Stark effect [155,156], Rashba effect [143,157], and perovskite based spin-valves [149,158,159].…”

Section: Please Cite This Article As Doi: 101063/50031821mentioning

confidence: 99%

The photophysics of Ruddlesden-Popper perovskites: A tale of energy, charges, and spins

Righetto

Giovanni

Lim

et al. 2021

Applied Physics Reviews

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Quasi two-dimensional halide perovskites (also known as Ruddlesden-Popper or RPs) are the most recent and exciting evolution in the perovskite field. Possessing a unique combination of enhanced moisture and material stability, whilst retaining the excellent optoelectronic properties, RPs are poised to be a game changer in the perovskite field. Spurred by their recent achievements in solar cells, light-emitting diodes and spintronic devices, these materials have garnered a mounting interest. Herein, we critically review the photophysics of RPs and distil the science behind their structure-property relations. We first focus on their structure and morphology by highlighting the crucial role of large cations: dictating the RPs' layered structure and the statistical distribution of thicknesses (i.e., n-phases). Next, we discuss how optoelectronic properties of RPs differ from conventional halide perovskites. Structural disorder, stronger excitonic and polaronic interaction shape the nature of photo-excitations and their fate. For example, faster recombinations and hindered transport are expected for charge carriers in thinner n-phases. However, the complex energetic landscape of RPs, which originates from the coexistence of different n-phases, allows for funnelling of energy and charges. Presently, the photophysics of RPs is still nascent, with many recent exciting discoveries from coherence effects in the above-mentioned funnelling cascade to spin effects.Giant Rashba spin-orbit coupling, also observed in RPs, dictates their spin dynamics and provides exciting spintronics opportunities. To leverage these propitious RPs, future research must entail a cross-disciplinary approach. While materials engineering will unlock new chiral RPs and Dion-Jacobson variants, novel characterization techniques such as in situ synchrotronbased X-ray diffraction, ultrafast electron microscopy, and multi-dimensional electronic spectroscopy etc. are essential in unravelling their secrets and unleashing their full potential.

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“…Moreover, halide perovskites can be solution processed at low temperatures, which significantly reduces their fabrication cost and complexity 4 . These advantages have led to the emergence of a variety of novel perovskite-based devices in the past decade 5 , 6 , such as solar cells (SCs) 7 – 10 , light-emitting diodes (LEDs) 11 – 14 , lasers 15 – 17 , photodetectors (PDs) 18 – 20 , sensors 21 , 22 , catalyst electrodes 23 – 25 , field-effect transistors 26 , 27 , fuel cells 28 , 29 , memory 30 , 31 and spintronic devices 32 , 33 . However, halide perovskites are prone to phase changes and compositional degradation in the ambient environment.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic–perovskite solar cells, light emitters, and sensors

Fan

Wong

2022

Microsyst Nanoeng

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The field of plasmonics explores the interaction between light and metallic micro/nanostructures and films. The collective oscillation of free electrons on metallic surfaces enables subwavelength optical confinement and enhanced light–matter interactions. In optoelectronics, perovskite materials are particularly attractive due to their excellent absorption, emission, and carrier transport properties, which lead to the improved performance of solar cells, light-emitting diodes (LEDs), lasers, photodetectors, and sensors. When perovskite materials are coupled with plasmonic structures, the device performance significantly improves owing to strong near-field and far-field optical enhancements, as well as the plasmoelectric effect. Here, we review recent theoretical and experimental works on plasmonic perovskite solar cells, light emitters, and sensors. The underlying physical mechanisms, design routes, device performances, and optimization strategies are summarized. This review also lays out challenges and future directions for the plasmonic perovskite research field toward next-generation optoelectronic technologies.

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Spin‐Polarized Electronic Transport through Ferromagnet/Organic–Inorganic Hybrid Perovskite Spinterfaces at Room Temperature

Abstract: COMMUNICATION 1900718 (1 of 7)

Cited by 22 publications

References 43 publications

Spinterfaces Manipulate Large Magnetic Field Effects in 3D and Quasi‐2D Organic–Inorganic Hybrid Perovskites

Spinterfaces Manipulate Large Magnetic Field Effects in 3D and Quasi‐2D Organic–Inorganic Hybrid Perovskites

The photophysics of Ruddlesden-Popper perovskites: A tale of energy, charges, and spins

Plasmonic–perovskite solar cells, light emitters, and sensors

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