Layer-by-layer assembly of CsPbX<sub>3</sub> nanocrystals into large-scale homostructures

Cirignano, Matilde; Fiorito, Sergio; Barelli, Matteo; Aglieri, Vincenzo; Franco, Manuela De; Jalali, Houman Bahmani; Toma, Andréa; Stasio, Francesco Di

doi:10.1039/d2nr04169c

Cited by 7 publications

(10 citation statements)

References 57 publications

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“…Preparation of the CsPbBr 3 NC film stack is carried out via a layer-by-layer (LbL) technique (adapted from ref ) via spin coating. After the depostion of every layer of CsPbBr 3 , a few microliters of methyl acetate, which is a known antisolvent for CsPbBr 3 NCs, are dropped under dynamic conditions before depositing the subsequent layer in the same way. This step positively affects both the film formation and the optical properties by stripping original ligand molecules (oleate and oleylammonium) from the top of the film, thus preventing washout of emitting material during the subsequent deposition process. , The construction of such a multilayer allows us to cast large amounts of emitters, which are highly sought for their applicability in various fields where it is often required for the production of a great amount of light such as lasing, , while preserving the high-end optical properties typical of colloidal perovskite NCs.…”

Section: Results and Discussionmentioning

confidence: 99%

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

Bertucci

Escher

Cirignano

et al. 2023

ACS Appl. Opt. Mater.

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Optical microcavities grant manipulation over light−matter interactions and light propagation, enabling the fabrication of foundational optical and optoelectronic components. However, the materials used for high-performing systems, mostly bulk inorganics, are typically costly, and their processing is hardly scalable. In this work, we present an alternative way to fabricate planar optical resonators via solely solution processing while approaching the performances of conventional systems. Here, we couple fully solution-processed high dielectric contrast inorganic Bragg mirrors obtained by sol−gel deposition with the remarkable photoluminescence properties of CsPbBr 3 perovskite nanocrystals. The approach yields microcavities with a quality factor of ∼220, which is a record value for solution-processed inorganic structures, and a strong emission redistribution resulting in a 3-fold directional intensity enhancement.

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Section: Results and Discussionmentioning

confidence: 99%

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

Bertucci

Escher

Cirignano

et al. 2023

ACS Appl. Opt. Mater.

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“…Applications associated with the use of CsPbX 3 include solar cells, emitting films, photodetectors, and biological sensors. [18][19][20][21] With the far-ranging applications in energy-related contraptions and devices using CsPbX 3 perovskite materials, there is a debate over their instability towards phase shifting when the temperature is altered. Therefore, to gain maximum benefit from the characteristics they offer, they need engineering by means of different approaches.…”

Section: Introductionmentioning

confidence: 99%

“…Such features offered by Cs perovskites have been actively employed in the fabrication of various devices. Applications associated with the use of CsPbX 3 include solar cells, emitting films, photodetectors, and biological sensors 18‐21 …”

Section: Introductionmentioning

confidence: 99%

‘Out of the glovebox’ studies of a multifunctional [Gd³⁺‐Ho³⁺‐Dy³⁺]:CsPbI_2.7Br_0.3 perovskite semiconductor system for energy applications

Jaffri,

Ahmad,

Abrahams

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDThis work deciphers the first report on the treble lanthanide‐doped perovskite heterosystem [Gd3+‐Ho3+‐Dy3+]:CsPbI2.7Br0.3 (GHD:C‐PVSK) and subsequently explores its prospects for solar cells, energy generation, and charge storage.RESULTSGHD:C‐PVSK remained optically active for a period of 28 days with a band gap energy of 1.62–1.76 eV. The developed perovskite material possesses cubic phase with typical ABX3 geometry and the subsequently deposited thin films have compact morphology. As a light absorber layer, a GHD:C‐PVSK‐based solution‐processed perovskite solar cell executed an efficiency of 15.11% and an improved fill factor of 71.25%. In electrocatalytic assays, GHD:C‐PVSK emerged as a bifunctional catalyst for oxygen and hydrogen generation with greater tendency towards pure hydrogen production, exuding overpotential (ηHER) – that is, 143 mV and 123.4 mV dec−1 of the Tafel slope value. With a remarkable service life of 100 min inside the electrolyte, the GHD:C‐PVSK electrode was characterized by its excellent charge storage. It has a unit capacity of 383 mA h g−1 and is marked by reduced equivalent series resistance (Rs) of 0.66 Ω.CONCLUSIONThrough photoelectrical and electrical analysis, GHD:C‐PVSK has emerged as a sustainable and energy‐efficient material that can be stabilized by suitable thermal modulation and lanthanide doping. © 2024 Society of Chemical Industry (SCI).

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“…Therefore, in this work, a nonpolar compound with ultra-long alkyl chains, didodecyldimethylammonium bromide (DDAB), which has previously been used in perovskite nanocrystals, − was smartly selected to modify the surface of the perovskite film. By DDAB modification, the perovskite/electron transport layer (ETL) interface present minimized carrier losses and improved carrier extraction.…”

Section: Introductionmentioning

confidence: 99%

Nonpolar and Ultra-long-chain Ligand to Modify the Perovskite Interface toward High-Efficiency and Stable Wide Bandgap Perovskite Solar Cells

Huo

Liu

et al. 2023

ACS Appl. Energy Mater.

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Though tandem solar cells (TSCs) based on wide-bandgap perovskite solar cells (WB-PSCs) as the top sub-cells continuously gain efficiency breakthroughs, the low power conversion efficiency (PCE) of WB-PSCs caused by the defects and interface energy-level mismatch is still a vital issue limiting their performance. Moreover, the stability of the perovskite layer against the moisture and subsequent fabrication process is essential to highly stable TSCs. Herein, a nonpolar material with an ultra-long chain, didodecyldimethylammonium bromide (DDAB), was introduced to WB-PSCs as an interface material for reducing the surface defects and increasing the surface hydrophobicity of the perovskite layer. The DDAB-modified perovskite surface is much more hydrophobic, with a water contact angle of 104.9°. Systemically experimental studies reveal that apart from the passivation on the point defects, DDAB can suppress the formation of PbI2 aggregates, smoothing the perovskite surface and shifting the energy level upward. As a result, the 1.74 eV WB-PSCs with inverted structures exhibit a champion PCE of 18.74% by DDAB modification, compared to the standard device with a PCE of 16.50%. The device stability under a relative humidity of >85% is apparently enhanced by 5-fold. This work provides a concept of screening interface materials for highly efficient and stable WB-PSCs.

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Layer-by-layer assembly of CsPbX₃ nanocrystals into large-scale homostructures

Abstract: Advances in the surface chemistry of CsPbX3 (where X = Cl, Br or I) nanocrystals (NCs) enabled the replacement of native chain ligands in solution. However, there are few reports...

Cited by 7 publications

References 57 publications

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

‘Out of the glovebox’ studies of a multifunctional [Gd³⁺‐Ho³⁺‐Dy³⁺]:CsPbI_2.7Br_0.3 perovskite semiconductor system for energy applications

Nonpolar and Ultra-long-chain Ligand to Modify the Perovskite Interface toward High-Efficiency and Stable Wide Bandgap Perovskite Solar Cells

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Layer-by-layer assembly of CsPbX3 nanocrystals into large-scale homostructures

Abstract: Advances in the surface chemistry of CsPbX3 (where X = Cl, Br or I) nanocrystals (NCs) enabled the replacement of native chain ligands in solution. However, there are few reports...

Cited by 7 publications

References 57 publications

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr3 Perovskite Nanocrystals

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr3 Perovskite Nanocrystals

‘Out of the glovebox’ studies of a multifunctional [Gd3+‐Ho3+‐Dy3+]:CsPbI2.7Br0.3 perovskite semiconductor system for energy applications

Nonpolar and Ultra-long-chain Ligand to Modify the Perovskite Interface toward High-Efficiency and Stable Wide Bandgap Perovskite Solar Cells

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Product

Resources

About

Layer-by-layer assembly of CsPbX₃ nanocrystals into large-scale homostructures

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals

‘Out of the glovebox’ studies of a multifunctional [Gd³⁺‐Ho³⁺‐Dy³⁺]:CsPbI_2.7Br_0.3 perovskite semiconductor system for energy applications