Modulating CsPbBr<sub>3</sub> nanocrystals encapsulated in PCN-224(Zr) for boosting full-spectrum-driven CO<sub>2</sub> reduction: S-scheme transfer, photothermal-synergistic effect, and DFT calculations

Chen, Yan-He; Shen, Jin-Qiu; Chen, Xiao-Lu; Tang, Luobing; Zhang, Na; Zhang, Jian-Yong; Liu, Zhen-Jiang

doi:10.1039/d3se01029e

Cited by 3 publications

(1 citation statement)

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“…Lead halide perovskites as thin films or nanoparticles (NPs), either organic-inorganic or all-inorganic, are promising materials [ 1 , 2 ] for many applications, as they exhibit outstanding optical properties, including a high extinction coefficient in the visible range, efficient photoluminescence, and narrow emission line widths [ 2 ], which makes them appealing as active components in solar cells [ 3 , 4 , 5 ] in photodetectors [ 6 ] and as photocatalysts [ 7 , 8 , 9 ]. However, the main limitations towards their large-scale production and commercialization have been mainly ascribed to their poor structural and thermal properties as well as poor photo-stability, all of which cause serious issues in material preparation, storage, application, and device fabrication [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

Giancaspro,

Panniello,

Depalo

et al. 2023

Nanomaterials

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Over the last decade, the attractive properties of CsPbBr3 nanoparticles (NPs) have driven ever-increasing progress in the development of synthetic procedures to obtain high-quality NPs at high concentrations. Understanding how the properties of NPs are influenced by the composition of the reaction mixture in combination with the specific synthetic methodology is crucial, both for further elucidating the fundamental characteristics of this class of materials and for their manufacturing towards technological applications. This work aims to shed light on this aspect by synthesizing CsPbBr3 NPs by means of two well-assessed synthetic procedures, namely, hot injection (HI) and ligand-assisted reprecipitation (LARP) in non-polar solvents, using PbBr2 and Cs2CO3 as precursors in the presence of already widely investigated ligands. The overall goal is to study and compare the properties of the NPs to understand how each synthetic method influences the NPs’ size and/or the optical properties. Reaction composition and conditions are purposely tuned towards the production of nanocubes with narrow size distribution, high emission properties, and the highest achievable concentration. As a result, the formation of bulk crystals as precipitate in LARP limits the achievement of a highly concentrated NP solution. The size of the NPs obtained by LARP seems to be poorly affected by the ligands’ nature and the excess bromide, as consequence of bromide-rich solvation agents, effectively results in NPs with excellent emission properties. In contrast, NPs synthesized by HI exhibit high reaction yield, diffusion growth-controlled size, and less striking emission properties, probably ascribed to a bromide-deficient condition.

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Section: Introductionmentioning

confidence: 99%

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

Giancaspro,

Panniello,

Depalo

et al. 2023

Nanomaterials

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The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol‐Dispersed CsPbX₃ Nanocrystals and on the Stability Enhancement in Light‐Emitting Applications

Uribe‐Vegas,

Villanueva‐Antolí,

Segura

et al. 2024

Advanced Optical Materials

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The ligand passivation is considered an attractive strategy to prepare high‐quality perovskite nanocrystals (PNCs) with improved photophysical features in polar media. However, the long‐term stabilization of PNCs in these environments is still challenging, being pivotal to understanding the protection mechanism given by prominent surface ligands and avoiding material deterioration in polar solvents. In this work, how the nature of diverse alkylammonium bromides used during surface passivation influences the photophysical properties and quality of CsPbX3 PNCs fully dispersed in alcohol environments, exhibiting stability up to 10 months are investigated. By adding didodecyldimethylammonium benzyldodecyldimethylammonium and tetrabutylammonium bromides (DDAB, BDAB, and TBAB, respectively), DDAB and BDAB promote a suitable and partial surface coverage are observed, respectively, suppressing defect sites in the nanocrystals. Conversely, TBAB shows poor surface protection, decreasing the PL features of PNCs. The presence of DDAB and BDAB favors the fabrication of color converters, and efficient light‐emitting diodes (LEDs) with external quantum efficiencies (EQE) of ≈23%. Interestingly, significant device stability with BDAB capping shows an LED half‐life of 20‐fold longer than for DDAB. This contribution offers a promising approach for preparing highly luminescent and stable alcohol‐dispersed PNCs, useful for fabricating efficient optoelectronic devices.

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Recent advances in the construction of structurally diverse catalysts for enhanced photocatalytic CO2 reduction

Wang,

Chen,

2024

Separation and Purification Technology

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Modulating CsPbBr₃ nanocrystals encapsulated in PCN-224(Zr) for boosting full-spectrum-driven CO₂ reduction: S-scheme transfer, photothermal-synergistic effect, and DFT calculations

Abstract: Due to superior light harvesting ability and high carrier mobility, CsPbBr3 perovskites become alternative catalysts for solar CO2 reduction. Herein, a p-n heterojunction by encapsulating CsPbBr3 nanocrystals into PCN-224(Zr) framework...

Cited by 3 publications

References 35 publications

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol‐Dispersed CsPbX₃ Nanocrystals and on the Stability Enhancement in Light‐Emitting Applications

Recent advances in the construction of structurally diverse catalysts for enhanced photocatalytic CO2 reduction

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Modulating CsPbBr3 nanocrystals encapsulated in PCN-224(Zr) for boosting full-spectrum-driven CO2 reduction: S-scheme transfer, photothermal-synergistic effect, and DFT calculations

Abstract: Due to superior light harvesting ability and high carrier mobility, CsPbBr3 perovskites become alternative catalysts for solar CO2 reduction. Herein, a p-n heterojunction by encapsulating CsPbBr3 nanocrystals into PCN-224(Zr) framework...

Cited by 3 publications

References 35 publications

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr3 Nanoparticles

The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol‐Dispersed CsPbX3 Nanocrystals and on the Stability Enhancement in Light‐Emitting Applications

Recent advances in the construction of structurally diverse catalysts for enhanced photocatalytic CO2 reduction

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Modulating CsPbBr₃ nanocrystals encapsulated in PCN-224(Zr) for boosting full-spectrum-driven CO₂ reduction: S-scheme transfer, photothermal-synergistic effect, and DFT calculations

The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol‐Dispersed CsPbX₃ Nanocrystals and on the Stability Enhancement in Light‐Emitting Applications