Unveiling the Impact of Bi³⁺ Heterovalent Doping on the Negative Capacitance and Ionic Conductivity of Perovskite Single Crystals: Implication in Neuromorphic Computing

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The introduction of heterovalent metal ion doping in the lead (Pb) halide perovskites presents a novel opportunity to manipulate electronic and ionic properties by introducing dopant charges increasing carrier concentration single crystals. While previous studies have reported on use bismuth (Bi

Language: Английский

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Suppression of Light-Induced Phase Segregations in Mixed Halide Perovskites through Ligand Passivation

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1760 - 1768

Published: Feb. 11, 2025

Mixed halide perovskites (MHPs) are useful for tandem solar cells and optoelectronic devices due to their absorption emission tunability over the whole visible spectrum improved stability. However, one of main challenges is phase segregation under continuous illumination or applied bias, which hinders utilization applications with full potential. Here, in this letter, we studied MHPs, especially a focus CsPbI1.5Br1.5 325 nm laser through photoluminescence (PL) spectroscopy real-time video illumination. We provided remedy prevent unwanted using 1-dodecanthiol (DSH) ligand treatment. It also observed that, during relaxation dark conditions, PL characteristics can even be reverted original condition. Following passivation, film sustain almost 4 min high-power irradiation without any degradation segregation, as spectroscopy. Thereafter, negligible separation occurs after exposure light min. A demonstrates efficacy DSH suppression dispersion. The observation supported by density functional theory calculations, showing that effectively passivate vacancies suppress

Language: Английский

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Autonomous Control of Ion Migration at α‐FAPbI₃ Heterointerfaces via Interfacial‐Self‐Assembled 2D Perovskite

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)

Published: Aug. 4, 2024

Abstract Harmonizing homogeneity in charge distribution within metal halide perovskite solar cells is essential for maintaining device quality. The adsorption of ions from perovskites onto the electron transport layer leads to creation redistributed space‐charge regions (SCR), which facilitate segregation and ionic migration, resulting imbalances diminished extraction capability at interface. research examines intricate interplay between SCRs affecting iodide oxidation their impact on photovoltaics, uncovering a previously overlooked aspect that influence accumulation electronic uniformity. A paradox identified interfaces improves initial open‐circuit voltage, however, compromises stability with collapsed distribution. To address this issue, ion conduction regulated by utilizing self‐assembled 2D cationic exchange low migration barrier buried interface, thereby mitigating inhomogeneity. This approach exhibits power conversion efficiency (PCE) 24.38% fill‐factor 84% maintains 91.87% PCE duration 2070 h.

Language: Английский

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A mini review of recently progress on halide perovskite memristor devices: materials sciences, challenges and applications

Materials Today Energy, Journal Year: 2024, Volume and Issue: 45, P. 101692 - 101692

Published: Sept. 6, 2024

Language: Английский

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Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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Inhibiting Ion Migration in Strontium-Lead Halide Perovsikte for Pure Blue Emission: A First Principles and Experiment Study

Optics Letters, Journal Year: 2025, Volume and Issue: 50(3), P. 1029 - 1029

Published: Jan. 7, 2025

Bromide–chloride mixed perovskites have garnered significant attention as a direct and efficient material for achieving pure-blue emission. However, the complex problem of halide migration in presents obstacle to stable electroluminescence (EL) spectra. Here, we investigate mechanism partially replacing B-site Pb 2+ with non-toxic Sr achieve emission based on first principles. The ion mobility activation energy is 1.23 eV, which an order magnitude greater than that halogens. Meanwhile, incorporation triples halogen migration. Furthermore, defect formation increases from 4.75 eV 5.62 thereby reducing channels. Transient absorption spectroscopy demonstrates suppressing pathway enhancing promotes perovskite film exhibit excellent spectral stability under laser pumping. Our work provides insights development highly eco-friendly devices.

Language: Английский

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Interface enhancement effect: SnO2/CsPbBr3 hetero-junction for improve nuclear radiation detection performance and stability

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(3)

Published: Jan. 21, 2025

The CsPbBr3 single crystal detector emerges as a highly promising candidate among semiconductor nuclear radiation detectors, which exhibits an extensive potential application across multitude of critical domains, particularly in physics, energy, medicine, etc. However, the polarization problem has limited and development detectors even posed significant hindrance to their practical implementation. In this paper, pre-designed SnO2/CsPbBr3 hetero-junction was meticulously engineered at interface Ti/CsPbBr3/Ti detector, aiming solve problem. This paper investigates effects on electrical characteristics, detection performance, long-term stability detector. final results demonstrated that had multiple beneficial On one hand, exhibited superior electron extraction efficiency when compared Ti/CsPbBr3 interface. other SnO2 layer played crucial role preventing migration ions from interface, well blocking permeation atmospheric moisture elements surface Consequently, performance enhanced long-stability After enhancement, achieved improved energy resolution 13.59% electric field 6000 V/cm maintained stable approximately 24 ± 5% 3000 for over 12 h. study work provided new perspective enhancing ensuring CsPbBr3-based detectors.

Language: Английский

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Stability strategies for perovskite solar cells: From counter electrode materials aspect

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 532, P. 216499 - 216499

Published: Feb. 18, 2025

Language: Английский

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In‐Memory Computing with Self‐Rectification and Dynamic Logical Reconfiguration of 12 Algorithms in a Single Halide Perovskites

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract Although memristor‐based in‐memory computing (IMC) prototypes demonstrate great progress and performance, integrating high flexibility programmability into large‐scale, high‐density crossbar arrays remain a major hurdle for advanced systems. Herein, the execution of 12 distinct algorithms is successfully implemented in single halide perovskite based IMC, leading to construction memory with reconfigurable logic operation capabilities. Moreover, device exhibits robust anti‐crosstalk paving way its potential application integrated arrays. The work differs from common resistive switching, which needs electro‐forming shift high‐resistance state (HRS) low‐resistance (LRS). Instead, it begins LRS driven by ionic conduction, switching controlled reversible barriers due ion migration accumulation, enabling voltage magnitude polarity independently regulate various behaviors. Additionally, mappings between environmental parameters behavioral patterns are systematically established, providing an approach adapting architectures evolving conditions. This 1R‐IMC provides self‐rectification multiple functions, vital flexible, programmable computing.

Language: Английский

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Halide perovskite photovoltaics for in-sensor reservoir computing

Nano Energy, Journal Year: 2024, Volume and Issue: 129, P. 109949 - 109949

Published: July 1, 2024

Language: Английский

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