Discrete interfacial effects of organic lead halide perovskite coating on magnetic underlayer: MAPbBr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msub><mml:mrow/><mml:mn>3</mml:mn></mml:msub></mml:math>/FePd heterostructure

Yeh, Shyr Shyan; Liu, Shi Yu; Hsu, Chuan Che; Hung, Hsuan Ching; Niu, Mu Chun; Lo, Pei Hsuan; Chao, Yu Chiang; Lin, Wen Chin

doi:10.1016/j.surfin.2021.101133

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…The CsPbBr 3 QDs were also spin-coated on the flat surfaces of the FePd and Fe layers, where they appeared as continuous films (Figure S1). In contrast to the previously reported MAPbBr 3 /FePd heterostructure that exhibits disc-like nanostructures, 32,33 this observation suggests that our CsPbBr 3 QDs/FM structure indeed has a layer-wise hetero-feature, beneficial to current semiconductor fabrication techniques, regardless of the underlying FM materials. Figure 1b illustrates the variations of R q (left y axis) and grain size (right y axis) of the CsPbBr 3 QDs/Co (10 nm) heterostructure as a function of laser illumination time (at 0, 30, and 60 min).…”

Section: Effect Of Laser Illumination On Morphologycontrasting

confidence: 94%

Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Liu

Chen

et al. 2023

ACS Appl. Nano Mater.

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A strong demand currently exists for ferromagnetic (FM) materials with adjustable magnetic properties. In this study, using laser illumination, we demonstrated the direct and efficient modulation of the magnetism of thin FM films covered by all-inorganic cesium lead bromide (CsPbBr 3 ) perovskite quantum dots (QDs). The surface morphology and characteristic sizes of the CsPbBr 3 QDs changed considerably and evolved gradually with the increase in the laser illumination time, triggering a series of redox and interfacial diffusion processes, particularly at the interface of the CsPbBr 3 QDs/Co heterostructure. The magnetic properties were thus adjustable by varying the magnetic hysteresis loop in accordance with the Co thin film thickness. We believe that this study will pave the way for advanced spintronic applications.

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Section: Effect Of Laser Illumination On Morphologycontrasting

confidence: 94%

Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Liu

Chen

et al. 2023

ACS Appl. Nano Mater.

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“…The first peak observed at a higher frequency corresponds to the geometrical capacitance and provides information related to electronic transport and dielectric constants . Similarly, intermediate peaks are responsible for charge carrier transport, ion migration, and interfacial effects …”

Section: Resultsmentioning

confidence: 99%

“…35 Similarly, intermediate peaks are responsible for charge carrier transport, 36 ion migration, 37 and interfacial effects. 38 Next, we passivated the surface of MAPbBr 3 SCs (ref) by dipping in a solution of octyl ammonium sulfate for different time periods. Sulfate anions bound to Pb 2+ cations via a strong chemical interaction and formed a thin layer of PbSO 4 on the surface of SCs.…”

Section: Resultsmentioning

confidence: 99%

Deconvoluting the Impedance Response of Halide Perovskite Single Crystals: The Distribution of Relaxation Time Method

et al. 2023

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Electrochemical impedance spectroscopy (EIS) has been emerging as a promising tool to study the core mechanisms occurring within metal halide perovskites (MHPs). Generally, MHPs show one or two semicircles in the Nyquist spectra in the probed frequency range. However, in the presence of external stimuli, often a Warburg diffusion or an inductive loop is observed at low frequencies. In such cases, a comparison of low-frequency parameters in both cases cannot be drawn because of the lack of a unique electrical circuit (EC). To overcome the issue of lack of EC, transformation of the frequency-domain technique to the time domain is carried out. In this work, we investigated three different cases of MAPbI3, MAPbBr3, and surface-passivated MAPbBr3 single crystals (SCs), which showed one suppressed semicircle, two semicircles, and a Warburg-like diffusion, respectively, in the Nyquist response of EIS. Next, we transformed these spectra into the time domain using the distribution of relaxation times (DRT) technique, a machine-learning-assisted tool. The obtained results suggest that in the case of Nyquist spectra with one semicircle (the case of MAPbI3 SCs), the observed time constants using EC and DRT are close enough. However, in the case of MAPbBr3 SC, three different time constants are obtained, associated with high, medium, and low frequencies, although the Nyquist response showed two semicircles. At last, in the presence of surface-passivated SCs, the Warburg-like feature changes significantly for different passivation times. Interestingly, the DRT spectra showed almost similar time constants, through which reliable information on the low-frequency RC can be extracted. Thus, DRT can pave the way for the easy and reliable interpretation of EIS spectra, which is not possible using EC.

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Discrete interfacial effects of organic lead halide perovskite coating on magnetic underlayer: MAPbBr3/FePd heterostructure

Cited by 2 publications

References 27 publications

Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Deconvoluting the Impedance Response of Halide Perovskite Single Crystals: The Distribution of Relaxation Time Method

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Discrete interfacial effects of organic lead halide perovskite coating on magnetic underlayer: MAPbBr3/FePd heterostructure

Cited by 2 publications

References 27 publications

Direct Magnetism Modulation of CsPbBr3 Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Direct Magnetism Modulation of CsPbBr3 Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Deconvoluting the Impedance Response of Halide Perovskite Single Crystals: The Distribution of Relaxation Time Method

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Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications

Direct Magnetism Modulation of CsPbBr₃ Quantum Dots/Cobalt Heterostructures by Laser Illumination for Spintronic Applications