Tiny spots to light the future: advances in synthesis, properties, and application of perovskite nanocrystals in solar cells

Scalon, Lucas; Freitas, Flavio S.; Marques, Francisco das Chagas; Nogueira, Ana F.

doi:10.1039/d2nr05043a

Cited by 5 publications

(7 citation statements)

References 291 publications

(492 reference statements)

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“…This route allowed to bypass the conventional dissolution step of the ionic precursors of LHP NCs requiring high temperatures or aggressive polar solvents. 32 The dispersion of the chosen lead precursor (PbBr 2 ) in toluene was accomplished by the presence of an equimolar amount of (n-Hept) 4 NBr salt, promoting the formation of soluble intermediates. 33 The modulation of the halide component (to regard the blue region in emission for the corresponding NCs, vide inf ra) was subsequently performed by introducing the suitable quantity of dimethyldioctadecylammonium chloride (DODC) in the reaction mixture (PbBr 2 /DODC = 5:1 mol/mol) before the cesium injection, as schematized in Figure 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The key aspect of the proposed synthetic approach inherently consisted in the injection of the cesium source into the reaction mixture containing the other perovskite constituting elements (lead precursor and halide sources) previously dissolved in toluene. This route allowed to bypass the conventional dissolution step of the ionic precursors of LHP NCs requiring high temperatures or aggressive polar solvents . The dispersion of the chosen lead precursor (PbBr 2 ) in toluene was accomplished by the presence of an equimolar amount of ( n -Hept) 4 NBr salt, promoting the formation of soluble intermediates .…”

Section: Results and Discussionmentioning

confidence: 99%

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Synthetic Control over the Surface Chemistry of Blue-Emitting Perovskite Nanocrystals for Photocatalysis

Grisorio

Dibenedetto

Matuhina

et al. 2023

ACS Appl. Nano Mater.

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Lead halide perovskite nanocrystals (NCs) are particularly suitable for light-emitting and photocatalysis applications, where their potential can be maximized by controlling the surface composition of their organic shell. In this study, the preparation of CsPbCl x Br 3−x NCs at room temperature in toluene is described. Three differently structured surfactants are utilized for the synthesis, each with a specific function, namely, the solubilization of the lead precursor (n-Hept 4 NBr), the surface passivation with halide modification (dimethyldioctadecylammonium chloride), and the protection of the surface-active sites (octanoic acid) for photocatalysis. Under these conditions, nearly monodispersed blueemitting nanocubes are selectively obtained in a one-pot synthesis by combining specific amounts of the perovskite precursors. As supported by thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy investigations, the organic shell of the obtained NCs is composed of electrostatically bound dimethyldioctadecylammonium ions, granting robustness to the corresponding NCs, and octanoic acid molecules, interacting with the nanoparticle surface through weaker secondary bonds. The obtained NCs exhibit a high photoluminescence quantum yield (PLQY = 72 ± 3%) notwithstanding multiexponential recombination dynamics of the excited state, resulting from the different passivation modes at the NC surface. Moreover, the NCs show a remarkable optical stability after exposure to high temperatures and to water contact due to the high surface density of the multifunctional organic ligands. The introduction of 4-tert-butylphenyl thiol promotes a charge transfer process at the NC/thiol interface formed upon removal of the labile ligands (octanoic acid) at the NC surface. In these conditions, the NCs are prone to the photoinduced conversion of the aromatic thiol into the corresponding disulfide without varying the optical properties of the perovskite photocatalyst upon the substrate conversion. Therefore, the obtained results cast light on the versatility of the surface engineering of lead halide perovskite NCs for efficient blue emission and photocatalysis with improved stability.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Synthetic Control over the Surface Chemistry of Blue-Emitting Perovskite Nanocrystals for Photocatalysis

Grisorio

Dibenedetto

Matuhina

et al. 2023

ACS Appl. Nano Mater.

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“…In LHP NC-based devices, PC 60 BM and PC 70 BM have been shown to act as excellent quenchers for inorganic Cs-based and hybrid FA-based NC excitons, [13][14][15]17 mediating fast exciton dissociation, electron extraction, and transport while functioning also as adhesives and additives improving mechanical flexibility 15 and passivating defects and interfaces. 15,18 Herein, we report on a systematic investigation based on luminescent techniques and lateral photoconductive devices to provide further insight into the exciton dissociation, charge transport and collection processes in blends of green-emitting CsPbBr 3 or red-emitting mixed halide CsPb(Br,I) 3 NCs with PC 70 BM. A simple synthesis is implemented allowing the fabrication of perovskite NCs decorated by short octylamine and octanoic-acid ligands 19 combined with a mild film postdeposition washing of excess ligands and synthesis byproducts.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In such blends, efficient NC exciton quenching and charge extraction can be mediated by appropriate design of heterointerfaces and segregation of the NC and organic components within the blends. Based on this concept, high-performance solar cells and photodetectors were recently developed using binary or ternary combinations of LHP NCs with fullerenes and conjugated polymers acting as electron or hole acceptors. − The most common n-type materials employed in those demonstrations are fullerene derivatives such as phenyl-C 60 -butyric acid methyl ester (PC 60 BM), and phenyl-C 70 -butyric acid methyl ester (PC 70 BM). PCBM-based molecules have been employed successfully as electron acceptors, transporters, interlayers, and buffer layers in organic and bulk perovskite PVs.…”

Section: Introductionmentioning

confidence: 99%

“…PCBM-based molecules have been employed successfully as electron acceptors, transporters, interlayers, and buffer layers in organic and bulk perovskite PVs. In LHP NC-based devices, PC 60 BM and PC 70 BM have been shown to act as excellent quenchers for inorganic Cs-based and hybrid FA-based NC excitons, − , mediating fast exciton dissociation, electron extraction, and transport while functioning also as adhesives and additives improving mechanical flexibility and passivating defects and interfaces. , …”

Section: Introductionmentioning

confidence: 99%

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Exploring Light Harvesting in Blends of Cesium Lead Halide Nanocrystals with Fullerene Derivatives

Charalambous,

Papagiorgis,

Polycarpou

et al. 2024

J. Phys. Chem. C

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Light harvesting devices based on metal halide perovskite nanocrystals (NCs) rely on the application of ligand washing or ligand exchange processes to transform pristine, glassy NC solids into electronically active NC arrays. A less explored route combines such treatments with the fabrication of NC heterojunctions with organic semiconductors to promote charge transfer through conductive pathways within the blends. Herein, optical spectroscopy and photoconductivity is implemented for a detailed investigation of the charge generation and charge extraction process in blends of green CsPbBr 3 NCs or red CsPb(Br,I) 3 NCs capped with short octylamine/octanoic-acid ligands with the fullerene derivative phenyl-C 70 -butyric acid methyl ester (PC 70 BM). Incorporation of the fullerene results in efficient quenching of the NC photoluminescence (PL) and the emergence of a fast subnanosecond decay channel in the transient PL, which is consistent with efficient interfacial dissociation of the NC excitons via electron transfer to the PC 70 BM. Importantly, the photocurrent in lateral devices with gold contacts is improved by up to 2 orders of magnitude upon fullerene incorporation, with optimum concentration of 20% per weight PC 70 BM for both green and red absorbing NCs. Short, post synthetic thermal annealing up to 100 °C further improves charge extraction due to better material blending and film quality, increasing by an additional order of magnitude the photo response of the devices.

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Synthesis and Properties of Halide Perovskites Nanocrystals Toward Solar Cells Application

Chini

2024

Energy Tech

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Halide perovskite nanocrystals (HP NCs) based perovskite solar cells (PSCs) have attracted serious attention along with relatively unstable bulk HP‐based thin‐ﬁlm solar cells aiming to make more eﬃcient and stable PSCs. HP NCs have still limited employment in PSCs despite their inherent unique properties such as strong absorption and photoluminescence, controlled transport and charge‐carrier mobility, low defect density, solution processability, and compatibility with large‐scale deposition techniques suitable for PSCs. Nanostructuring of the perovskites offers other unique characteristics such as confinement effects. These exciting characteristics together with the exceptional tunability in their shape, composition, and functionalities make HP NCs promising for PVs applications. In order to develop efficient HP NCs PSCs, major focus lies on discussing the various synthesis approaches, optoelectrical behaviors of HP NCs, and optimized device architectures. In this context, this review article deals with various approaches to HP NCs synthesis, properties, current challenges, and factors affecting the performance of the NC‐based PSCs. Based on these discussions, perspectives on promising directions for effective utilization of HP NCs toward the improvement and commercialization of the exciting promising material‐based stable and efficient PSCs in the near future are provided.

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Tiny spots to light the future: advances in synthesis, properties, and application of perovskite nanocrystals in solar cells

Abstract: Perovskites are in the hotspot of material science and technology. Outstanding properties have been discovered, fundamental mechanisms of defect formation and degradation elucidated, and applications in a wide variety of...

Cited by 5 publications

References 291 publications

Synthetic Control over the Surface Chemistry of Blue-Emitting Perovskite Nanocrystals for Photocatalysis

Synthetic Control over the Surface Chemistry of Blue-Emitting Perovskite Nanocrystals for Photocatalysis

Exploring Light Harvesting in Blends of Cesium Lead Halide Nanocrystals with Fullerene Derivatives

Synthesis and Properties of Halide Perovskites Nanocrystals Toward Solar Cells Application

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