In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr<sub>3</sub>–PbS Heterostructures

Yang, Yongge; Wang, Dandan; Li, Yusheng; Xia, Jing; Wei, Huiyun; Ding, Chao; Hu, Yuyu; Wei, Yuyao; Li, Hua; Liu, Dong; Shi, Guozheng; Zhang, Yaohong; Bi, Huan; Chen, Shikai; Li, Hongshi; Meng, Xiang-Min; Hayase, Shuzi; Shen, Qing

doi:10.1021/acsphotonics.3c01099

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…This strategy can be applied in solar cell-type-based photocatalysts. Similar strategies can be extended to colloidal heterostructure NCs, such as using PbS QDs as seeds and allowing for the crystal growth of perovskite on the surface of PbS, enabling the formation of heterojunctions with smaller lattice mismatch and showing more stable perovskite crystal structures, especially in polar solvent mediums [ 195 , 200 , 201 ]. This methodology allows for stable iodide-based perovskites with narrow bandgaps for solar cell and photocatalytic applications [ 202 ].…”

Section: Discussionmentioning

confidence: 99%

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Jagadeeswararao,

Galian,

Pérez-Prieto

2023

Nanomaterials

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Heterogeneous photocatalysts incorporating metal halide perovskites (MHPs) have garnered significant attention due to their remarkable attributes: strong visible-light absorption, tuneable band energy levels, rapid charge transfer, and defect tolerance. Additionally, the promising optical and electronic properties of MHP nanocrystals can be harnessed for photocatalytic applications through controlled crystal structure engineering, involving composition tuning via metal ion and halide ion variations, dimensional tuning, and surface chemistry modifications. Combination of perovskites with other materials can improve the photoinduced charge separation and charge transfer, building heterostructures with different band alignments, such as type-II, Z-scheme, and Schottky heterojunctions, which can fine-tune redox potentials of the perovskite for photocatalytic organic reactions. This review delves into the activation of organic molecules through charge and energy transfer mechanisms. The review further investigates the impact of crystal engineering on photocatalytic activity, spanning a diverse array of organic transformations, such as C–X bond formation (X = C, N, and O), [2 + 2] and [4 + 2] cycloadditions, substrate isomerization, and asymmetric catalysis. This study provides insights to propel the advancement of metal halide perovskite-based photocatalysts, thereby fostering innovation in organic chemical transformations.

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Section: Discussionmentioning

confidence: 99%

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Jagadeeswararao,

Galian,

Pérez-Prieto

2023

Nanomaterials

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Polymer-Gel-Derived PbS/C Composite Nanosheets and Their Photoelectronic Response Properties Studies in the NIR

Ma,

Zhang,

Gao

et al. 2024

Coatings

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Non-conjugated polymer-derived functional nanocomposites are one of the important ways to develop multifunctional hybrids. By increasing the degree of crosslinking, their photophysical properties can be improved. PbS is a class of narrow bandgap infrared active materials. To avoid aggregation and passivation of the surface defects of PbS nanomaterials, a large number of organic and inorganic ligands are usually used. In this study, PbS/C composite nanosheets were synthesized with Pb2+ ion-crosslinked sodium alginate gel by one-pot carbonization. The resulting nanosheets were coated on untreated A4 printing paper, and the electrodes were the graphite electrodes with 5B pencil drawings. The photocurrent signals of the products were measured using typical 650, 808, 980, and 1064 nm light sources. The results showed that the photocurrent switching signals were effectively extracted in the visible and near-infrared regions, which was attributed to the mutual passivation of defects during the in situ preparation of PbS and carbon nanomaterials. At the same time, the resulting nanocomposite exhibited electrical switching responses to the applied strain to a certain extent. The photophysical and defect passivation mechanisms were discussed based on the aggregation state of the carbon hybrid and the interfacial electron interaction. This material would have potential applications in broadband flexible photodetectors, tentacle sensors, or light harvesting interdisciplinary areas. This study provided a facile approach to prepare a low-cost hybrid with external stimulus response and multifunctionality. These results show that the interfacial charge transfer is the direct experimental evidence of interfacial interaction, and the regulation of interfacial interaction can improve the physical and chemical properties of nanocomposites, which can meet the interdisciplinary application. The interdisciplinary and application of more non-conjugated polymer systems in some frontier areas will be expanded upon.

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In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr₃–PbS Heterostructures

Cited by 2 publications

References 37 publications

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Polymer-Gel-Derived PbS/C Composite Nanosheets and Their Photoelectronic Response Properties Studies in the NIR

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In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr3–PbS Heterostructures

Cited by 2 publications

References 37 publications

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations

Polymer-Gel-Derived PbS/C Composite Nanosheets and Their Photoelectronic Response Properties Studies in the NIR

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In Situ Room-Temperature Synthesis of All-Colloidal Quantum Dot CsPbBr₃–PbS Heterostructures