Dry Mechanochemical Synthesis of Highly Luminescent, Blue and Green Hybrid Perovskite Solids

Martínez‐Sarti, Laura; Palazón, Francisco; Sessolo, Michele; Bolink, Henk J.

doi:10.1002/adom.201901494

Cited by 22 publications

(15 citation statements)

References 60 publications

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“…[20] The passivating effect of adamantylammonium halide compounds, [49] which has already been demonstrated for solvent-processed solar cells, could also be used to increase the PL of mechanochemically synthesized MA 1-y Cs y Pb(Br n Cl 1-n ) 3 powder, again indicating the successful passivation of non-radiative trap states. [50] For further details about the recent progresses of the mechanochemical perovskite synthesis, we refer to the reviews of Palazon et al, [15] Prochowicz et al, [14] and Rosales et al [51]…”

Section: Mechanochemical Synthesismentioning

confidence: 99%

“…[ 20 ] The passivating effect of adamantylammonium halide compounds, [ 49 ] which has already been demonstrated for solvent‐processed solar cells, could also be used to increase the PL of mechanochemically synthesized MA 1‐ y Cs y Pb(Br n Cl 1‐ n ) 3 powder, again indicating the successful passivation of non‐radiative trap states. [ 50 ]…”

Section: Halide Perovskites In Powder Formmentioning

confidence: 99%

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Recent Advances and Perspectives on Powder‐Based Halide Perovskite Film Processing

Leupold

Panzer

2021

Adv Funct Materials

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Halide perovskites have undergone an impressive development and could be used in a wide range of optoelectronic devices, where some of them are already at the edge of commercialization, e.g., perovskite solar cells. Recently, interest in perovskites in powder form has increased, as for example, they are found to exhibit high stability and allow for easy production of large quantities. Accordingly, also the topic of processing thin and thick films on the basis of perovskite powders is currently gaining momentum. Here, perovskite powder can form the basis for both, typical wet and solvent-based processing approaches, as well as for dry processes. In this Progress Report, the recent developments of halide perovskites in powder form and of film processing approaches are summarized that are based on them. The advantages and opportunities of the different processing methods are highlighted, but their individual drawbacks and limitations are also discussed. Prospects are also pointed out and possible steps necessary to unlock the full potential of powder-based processing methods for producing high quality thick and thin perovskite layers in the future are discussed.

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Section: Mechanochemical Synthesismentioning

confidence: 99%

Section: Halide Perovskites In Powder Formmentioning

confidence: 99%

Recent Advances and Perspectives on Powder‐Based Halide Perovskite Film Processing

Leupold

Panzer

2021

Adv Funct Materials

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show abstract

“…The designed 2D absorber materials exhibited good operational stability and excellent resistance to moisture due to the presence of bulky hydrophobic adamantane fragments in their structure. Adamantylammonium salts were also used as passivation reagents for perovskite quantum dots, leading to enhanced luminescence and improved stability [36].…”

Section: Introductionmentioning

confidence: 99%

Spectacular Enhancement of the Thermal and Photochemical Stability of MAPbI3 Perovskite Films Using Functionalized Tetraazaadamantane as a Molecular Modifier

et al. 2021

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Perovskite solar cells represent a highly promising third-generation photovoltaic technology. However, their practical implementation is hindered by low device operational stability, mostly related to facile degradation of the absorber materials under exposure to light and elevated temperatures. Improving the intrinsic stability of complex lead halides is a big scientific challenge, which might be addressed using various “molecular modifiers”. These modifiers are usually represented by some additives undergoing strong interactions with the perovskite absorber material, resulting in enhanced solar cell efficiency and/or operational stability. Herein, we present a derivative of 1,4,6,10-tetraazaadamantane, NAdCl, as a promising molecular modifier for lead halide perovskites. NAdCl spectacularly improved both the thermal and photochemical stability of methylammonium lead iodide (MAPbI3) films and, most importantly, prevented the formation of metallic lead Pb0 as a photolysis product. NAdCl improves the electronic quality of perovskite films by healing the traps for charge carriers. Furthermore, it strongly interacts with the perovskite framework and most likely stabilizes undercoordinated Pb2+ ions, which are responsible for Pb0 formation under light exposure. The obtained results feature 1,4,6,10-tetraazaadamantane derivatives as highly promising molecular modifiers that might help to improve the operational lifetime of perovskite solar cells and facilitate the practical implementation of this photovoltaic technology.

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“…26 Prochowicz et al obtained a mixed A-cation solid solution system MAxFA1-xPbI3 by mechano-synthesis to stabilise the α-FAPbI3 cubic phase in air, which is a key absorber layer in high-efficient solar cells. 22 To obtain perovskite solid solutions (e.g., with mixed A-cations), synthetic methods including antisolvent 21,27 and oversaturation 3,9 precipitation or mechanosynthesis (grinding) 13,28 are typically used. Principally, the choice of synthetic method has an impact on the morphology of the perovskite material: precipitation and mechano-synthetic methods have been widely used to obtain large single crystals or powders that can then be used for structural and photophysical studies.…”

Section: Introductionmentioning

confidence: 99%

Size Isn’t Everything - Compositional Variation in Hybrid Organic-Inorganic Lead Halide Perovskites: Kinetically- versus Thermodynamically-controlled Synthesis

Tian¹,

Zysman‐Colman

Morrison³

2021

Preprint

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The formation and study of a partial solid solution <a></a><a>Az1-xFAxPbBr3</a>, using ‘similar’ sized cations azetidinium (Az+) and formamidinium (FA+), was explored via mechanosynthesis and precipitation synthesis. The composition and lattice parameters of samples from both syntheses were analysed by 1H NMR and Rietveld refinement of the powder X-ray diffraction. A clear mismatch in the composition of the perovskite was found between the precipitated samples and the corresponding solutions. Such a mismatch was not observed for samples obtained via mechanosynthesis. The discrepancy suggests products are kinetically-controlled during precipitation, compared to thermodynamically-controlled mechanosynthesis. Furthermore, the cell volume as a function of composition in both 6H (Az-rich) and 3C (FA-rich) solid solutions suggests that FA+ is actually smaller than Az+, contradicting the literature. In the 3C (Az-poor) solid solutions, the extent of Az1-xFAxPbBr3 is unexpectedly smaller than Az1-xMAxPbBr3, again in contradiction to the expectation based on the reported cation sizes. These results indicate that other factors, as yet unidentified, must also contribute to the solid solution formation of organic-inorganic hybrid perovskites, not simply the relative sizes of the A-site cations.

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Dry Mechanochemical Synthesis of Highly Luminescent, Blue and Green Hybrid Perovskite Solids

Cited by 22 publications

References 60 publications

Recent Advances and Perspectives on Powder‐Based Halide Perovskite Film Processing

Recent Advances and Perspectives on Powder‐Based Halide Perovskite Film Processing

Spectacular Enhancement of the Thermal and Photochemical Stability of MAPbI3 Perovskite Films Using Functionalized Tetraazaadamantane as a Molecular Modifier

Size Isn’t Everything - Compositional Variation in Hybrid Organic-Inorganic Lead Halide Perovskites: Kinetically- versus Thermodynamically-controlled Synthesis

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