Zn-alloyed MAPbBr<sub>3</sub> crystals with improved thermoelectric and photocatalytic properties

Zhou, Zhanwei; Xu, Jiuyuan; Liu, Yuxuan; Chen, Wei; Zhang, Hengyang; Wang, Qun

doi:10.1039/d1qm00993a

Cited by 9 publications

(9 citation statements)

References 52 publications

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“…Organic–inorganic hybrid perovskites with outstanding light absorption capability and excellent photoelectronic properties have demonstrated good performance in solar cells, − light-emitting diodes, , photocatalysis, − and so forth. As a promising candidate, methylammonium lead iodide perovskite (MAPbI 3 ) was first utilized as a photocatalyst for producing H 2 through solar-driven HI splitting by Park et al in 2016, which promotes the research on photocatalytic H 2 generation with halide perovskite-based materials. − However, alleviating charge recombination within MAPbI 3 still remains a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

et al. 2022

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Interfacial photogenerated charge separation and transport have demonstrated great influence on photocatalytic performance. Herein, the composite photocatalysts of methylammonium lead iodide perovskite (MAPbI3) in TiO2 with a hollow multishell structure (HoMS) are designed and synthesized. The results indicate that the heterogeneous interface within the MAPbI3/Pt/TiO2-HoMS can help enhance the separation of photogenerated charges. HoMSs assembled with multiple shells can not only support large surfaces available for building a heterogeneous interface and photocatalytic reactions but also improve the light absorption capability of photocatalysts. Besides, the thin shell structure can also reduce the transmission distance of carriers so as to hinder charge recombination and improve charge utilization. As a result, samples of MAPbI3/Pt/triple-shelled TiO2 hollow structure displayed a H2 yield of 6856.2 μmol h–1 g–1 under visible light, which is greatly better than that of bare MAPbI3 (268.6 μmol h–1 g–1).

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Section: Introductionmentioning

confidence: 99%

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

et al. 2022

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“…These peaks are associated with two distinct components of vacancy-assisted ionic diffusion in perovskite crystals, originated from Br – and MA + ions . In our previous studies and studies by other authors on MAPbBr 3 SC, it was observed that resistance and capacitance values corresponding to the mid-frequency range (1–100 Hz) exhibit an activation energy of 0.28 eV, which can be attributed to the presence of Br – ions. ,− However, further experimental evidence is required to fully elucidate the specific associations of ions within the probed frequency range and their influence on the interface charge accumulation and reactivity. The present measurements are focused on the change in the resistance states and the associated charge behavior.…”

Section: Resultsmentioning

confidence: 88%

Understanding the Origin and Evolution of Resistive Effects during Switching Action in MAPbBr₃ Single Crystals

Purohit,

Pandey,

Kalam

et al. 2023

J. Phys. Chem. C

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Metal halide perovskite single crystals (MHPSCs) have garnered significant attention due to their exceptional optical and electrical properties, making them promising candidates for applications in solar cells and photodetectors. The single-crystal form of these materials exhibits superior characteristics compared to their polycrystalline counterparts. However, despite considerable efforts to understand hysteresis, there is still limited knowledge about the underlying mechanisms driving resistance changes in MHPSCs under external stimuli, such as scan rate and bias. This article presents a comprehensive investigation into the origin and evolution of resistive effects in the switching behavior of MAPbBr 3 single crystals. Our aim is to fill these gaps in understanding and provide valuable insights for the development of memristor devices. To observe and interpret the switching behavior, we employ various characterization techniques, including current−voltage (J−V) measurements, current−time (I−T) measurements, and electrochemical impedance spectroscopy (EIS) measurements under different scan rates and bias levels. Our findings suggest that during switching, the single crystals (SCs) exhibit high resistance at low applied bias, whereas higher applied bias results in a lower resistance value. We attribute the stable switching response at lower bias to the lower concentration of accumulated ions and electronic charge carriers. Conversely, an excess of charge accumulation at high bias leads to transient or decay responses in the I−T measurements. By gaining a deeper understanding of resistive effects in MHPSCs, this study contributes to the design and optimization of MHPSC-based devices, particularly in the context of halide-based perovskite memory devices. The insights gained from this research pave the way for the enhanced performance and improved reliability of perovskite memory devices, bringing us closer to realizing their full potential in various electronic applications.

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“…All of the samples show three distinct XRD peaks, which correspond to the diffraction of (300), (200), and (100) lattice planes of the cubic MAPbBr 3 perovskite. 38,39 The crystal structure of the perovskite remains unchanged after doping. The XPS patterns were further obtained to confirm the effectiveness of doping.…”

Section: Resultsmentioning

confidence: 99%

Modulating the nonlinear optical properties of MAPbBr₃ by metal ion doping

Chen,

Ouyang,

Chen

et al. 2024

J. Mater. Chem. C

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Zn-alloyed MAPbBr₃ crystals with improved thermoelectric and photocatalytic properties

Abstract: Zn–MAPbBr3 crystals exhibited an improved absorption capacity and better photocatalytic degradation performance toward RhB dye and higher electrical conductivity and a more positive Seebeck coefficient, compared with a pristine MAPbBr3 sample.

Cited by 9 publications

References 52 publications

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Understanding the Origin and Evolution of Resistive Effects during Switching Action in MAPbBr₃ Single Crystals

Modulating the nonlinear optical properties of MAPbBr₃ by metal ion doping

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Zn-alloyed MAPbBr3 crystals with improved thermoelectric and photocatalytic properties

Abstract: Zn–MAPbBr3 crystals exhibited an improved absorption capacity and better photocatalytic degradation performance toward RhB dye and higher electrical conductivity and a more positive Seebeck coefficient, compared with a pristine MAPbBr3 sample.

Cited by 9 publications

References 52 publications

Hollow Multishell-Structured TiO2/MAPbI3 Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Hollow Multishell-Structured TiO2/MAPbI3 Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Understanding the Origin and Evolution of Resistive Effects during Switching Action in MAPbBr3 Single Crystals

Modulating the nonlinear optical properties of MAPbBr3 by metal ion doping

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Product

Resources

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Zn-alloyed MAPbBr₃ crystals with improved thermoelectric and photocatalytic properties

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Hollow Multishell-Structured TiO₂/MAPbI₃ Composite Improves Charge Utilization for Visible-Light Photocatalytic Hydrogen Evolution

Understanding the Origin and Evolution of Resistive Effects during Switching Action in MAPbBr₃ Single Crystals

Modulating the nonlinear optical properties of MAPbBr₃ by metal ion doping