Insights into the formation mechanism of two-dimensional lead halide nanostructures

Klein, Eugen; Lesyuk, Rostyslav; Klinke, Christian

doi:10.1039/c7nr09564c

Cited by 18 publications

(21 citation statements)

References 53 publications

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“…1 shows ring structures of PbI 2 , which were prepared by etching of corresponding nanosheets using TOP. The PbI 2 nanosheets were synthesized in nonanoic acid 50. At the end of the reaction these sheets were centrifuged once to separate them from the reaction mixture.…”

Section: Resultsmentioning

confidence: 99%

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Colloidal lead iodide nanorings

et al. 2018

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Section: Resultsmentioning

confidence: 99%

“…The ring structures are obtained by etching as prepared PbI 2 nanosheets with trioctylphosphine (TOP). These nanosheets were prepared following the synthetic route described in our recent paper by changing the solvent from oleic acid to nonanoic acid 50. The nanorings are analyzed by TEM, XRD, AFM and UV/Vis spectroscopy techniques.…”

Section: Introductionmentioning

confidence: 99%

Colloidal lead iodide nanorings

et al. 2018

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“…The inks are stable over days, requiring only a sonication treatment before spray depositions when stored for long time ( Figure S1, Supporting Information). The ablated NCs appear in the typical hexagonal shape of PbI 2 crystals, [20] testifying their crystallinity after synthesis by laser ablation in solution. We refer to the supporting information ( Figure S2, Supporting Information) for the experimental setup of LASiS technique and ablation details.…”

Section: Wwwadvmattechnoldementioning

confidence: 86%

“…Figure 1d depicts the transmission electron microscopy (TEM) image of the ablated PbI 2 NCs. The ablated NCs appear in the typical hexagonal shape of PbI 2 crystals, [20] testifying their crystallinity after synthesis by laser ablation in solution. An average nanocrystals diameter of 51 ± 9 nm was estimated from TEM images, in line with the value of 64 ± 11 nm obtained from dynamic light scattering (DLS) measurements ( Figure S3, Supporting Information).…”

Section: Wwwadvmattechnoldementioning

confidence: 86%

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Sansoni

Bastiani

Aydın

et al. 2020

Adv Materials Technologies

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are directly realized on top of a silicon bottom cell. Utilizing commercial crystalline silicon (c-Si) wafers brings a technological challenge since the perovskite device needs then to be fabricated on wafers that feature micron-scale randomly distributed pyramidal texture, an imperative characteristic for industrial c-Si solar cells for minimizing reflection losses. The PSCs owe their present prominence to their high PCE obtained via solutiondeposition techniques, which is arguably cheaper and simpler compared to conventional vacuum-based deposition for device fabrication. From this perspective, it is required to make solution-based processing of perovskite solar cells compatible with the use of micron-scale textured substrates. Among solution processing techniques, spin coating is widespread due to its process simplicity, ease of access, and because high-quality polycrystalline perovskite films can be obtained. However, this technique is not suitable for upscaling toward industrialization. Also, considering suggestions for large-scale applications in which spin coating is translated into blade coating, the application of this technique usually results in high material consumption, which is undesirable for a sustainable low-cost production. Moreover, spin coating the perovskite layer on textured silicon bottom cells represents a challenge by itself which, to date, reportedly led to poor coverage of the films resulting in low-performing tandems. [2,3] At present, 2T tandems are mainly realized following two approaches. In the first case, the c-Si bottom cell features a mirror-polished flat front surface to accommodate spin-coated perovskite films. However, this causes reflection losses in the device, which hamper the overall PCE and require additional antireflective coatings or foils. [4] In the second case, the perovskite is deposited on textured c-Si via hybrid conversion, where the perovskite precursors, lead(II) iodide (PbI 2 ) and cesium bromide (CsBr), are thermally evaporated on the c-Si bottom cell and then converted into perovskite by spin coating the organic ammonium salts (formamidinium iodide/bromide, FAI, and FABr, respectively). [2] In this case, the limiting factor is represented by fine-tuning the conversion process. Overall, both techniques strongly rely on spin coating as a deposition/ conversion method, which still represents a roadblock toward scaling-up for commercialization. Indeed, for successful PV An innovative sequential eco-friendly spray coating (SEF-SC) technique is developed to uniformly deposit metal halide perovskite films on macroscale textured surfaces, such as textured crystalline-silicon wafers. Contrasting with previous work on spray-coated perovskite solar cells, the method presented in this work completely avoids the use of toxic and dangerous solvents. Both MAPbI 3 and CsFAMAPbI 3−x Br x perovskite films deposited by SEF-SC show excellent optoelectronic properties and no phase segregation, even when synthesized in ambient conditions. Uniform perovskite coatings are obtained...

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“…2D nanomaterials have only one dimension in the nano range while the other two dimensions are out of the nano range [46]. They are said to be the thinnest materials, which possess the highest surface area, and are increasingly gaining global interest from fundamentals of physical sciences, chemistry, to materials engineering.…”

Section: Two-dimensional Nanomaterials (2d Nanomaterials)mentioning

confidence: 99%

Recent Advances on Properties and Utility of Nanomaterials Generated from Industrial and Biological Activities

et al. 2021

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Today is the era of nanoscience and nanotechnology, which find applications in the field of medicine, electronics, and environmental remediation. Even though nanotechnology is in its emerging phase, it continues to provide solutions to numerous challenges. Nanotechnology and nanoparticles are found to be very effective because of their unique chemical and physical properties and high surface area, but their high cost is one of the major hurdles to its wider application. So, the synthesis of nanomaterials, especially 2D nanomaterials from industrial, agricultural, and other biological activities, could provide a cost-effective technique. The nanomaterials synthesized from such waste not only minimize pollution, but also provide an eco-friendly approach towards the utilization of the waste. In the present review work, emphasis has been given to the types of nanomaterials, different methods for the synthesis of 2D nanomaterials from the waste generated from industries, agriculture, and their application in electronics, medicine, and catalysis.

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Insights into the formation mechanism of two-dimensional lead halide nanostructures

Abstract: We present a colloidal synthesis strategy for lead halide nanosheets with a thickness of far below 100 nm.

Cited by 18 publications

References 53 publications

Colloidal lead iodide nanorings

Colloidal lead iodide nanorings

Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces

Recent Advances on Properties and Utility of Nanomaterials Generated from Industrial and Biological Activities

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