Shape-controlled synthesis of CsPbBr<sub>3</sub> nanorods with bright pure blue emission and high stability

Zhao, Qiqi; Chen, Feitong; Huang, Qi; Wang, Kaiyu; Li, Changqian; Wang, Rui; Liu, Chenyang; Xu, Wenli; Liu, Rui; Zhu, Huiling; Wang, Kunhua; Zhou, Tianliang; Ding, Jianxu

doi:10.1039/d3tc04681h

J. Mater. Chem. C

2024

DOI: 10.1039/d3tc04681h

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Shape-controlled synthesis of CsPbBr₃ nanorods with bright pure blue emission and high stability

Qiqi Zhao,

Feitong Chen,

Qi Huang

et al.

Abstract: Metal halide perovskite nanocrystals (NCs) have emerged as a highly promising luminescent materials for next generation light-emitting diodes (LEDs). However, the pure blue perovskite LEDs (460-470 nm) suffer from the...

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Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Chu,

You

2024

Advanced Materials

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Blue perovskite light‐emitting diodes (LEDs) are essential for the creation of full‐color displays and white‐light illumination, and some significant progress is made in recent years. However, most high‐performance blue perovskite LEDs are currently based on mixed‐halide perovskites and suffer from unstable spectra due to inevitable halide phase segregation, which is unfavorable for the application of blue perovskite LEDs. In contrast, blue emissions from pure bromide perovskites generally exhibit stable spectra (consistent emission peak positions and spectral shapes) and are worthy of attention. In this review, the recent advances in blue LEDs based on pure bromide perovskites according to different strategies are classified and summarized. Moreover, the challenges related to poor charge injection, high defect‐state density, lack of high‐performance in the deeper blue region, and inferior operational stability are addressed. Finally, an outlook is provided on feasible future research directions for highly bright, efficient, and stable blue perovskite LEDs.

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Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Chu,

You

2024

Advanced Materials

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Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals

Frank,

Henke,

Lampe

et al. 2024

Nat Commun

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Colloidal lead halide perovskite nanocrystals have potential for lighting applications due to their optical properties. Precise control of the nanocrystal dimensions and composition is a prerequisite for establishing practical applications. However, the rapid nature of their synthesis precludes a detailed understanding of the synthetic pathways, thereby limiting the optimisation. Here, we deduce the formation mechanisms of anisotropic lead halide perovskite nanocrystals, 1D nanorods and 2D nanoplatelets, by combining in situ X-ray scattering and photoluminescence spectroscopy. In both cases, emissive prolate nanoclusters form when the two precursor solutions are mixed. The ensuing antisolvent addition induces the divergent anisotropy: The intermediate nanoclusters are driven into a dense hexagonal mesophase, fusing to form nanorods. Contrastingly, nanoplatelets grow freely dispersed from dissolving nanoclusters, stacking subsequently in lamellar superstructures. Shape and size control of the nanocrystals are determined primarily by the antisolvent’s dipole moment and Hansen hydrogen bonding parameter. Exploiting the interplay of antisolvent and organic ligands could enable more complex nanocrystal geometries in the future.

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Different temperature-dependent fluorescence properties of CsPbBr₃ nanorods and nanowires

Chen,

Li,

Shen

et al. 2024

J. Phys.: Conf. Ser.

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The morphology of totally inorganic metal halide perovskites has a certain influence on their optoelectronic properties. In this study, one-dimensional CsPbBr3 nanorods (NRs) and nanowires (NWs) were arranged utilizing a boiling injection strategy. By controlling the processing time, NRs with a length of roughly 63 nm and NWs with a length of 300 nm were obtained, and it was found that the nanowires were grown from the nanorods. Temperature-dependent photoluminescence (PL) measurements were conducted on CsPbBr3 NRs and NWs, and NRs exhibit a more stable excitonic state at high temperatures (>240 K). This study provides a method to change the morphology of one-dimensional metal halide perovskite nanomaterials without doping, further promoting the application of one-dimensional all-inorganic perovskite materials in the field of optoelectronics.

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Shape-controlled synthesis of CsPbBr₃ nanorods with bright pure blue emission and high stability

Abstract: Metal halide perovskite nanocrystals (NCs) have emerged as a highly promising luminescent materials for next generation light-emitting diodes (LEDs). However, the pure blue perovskite LEDs (460-470 nm) suffer from the...

Cited by 3 publications

References 57 publications

Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals

Different temperature-dependent fluorescence properties of CsPbBr₃ nanorods and nanowires

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Shape-controlled synthesis of CsPbBr3 nanorods with bright pure blue emission and high stability

Abstract: Metal halide perovskite nanocrystals (NCs) have emerged as a highly promising luminescent materials for next generation light-emitting diodes (LEDs). However, the pure blue perovskite LEDs (460-470 nm) suffer from the...

Cited by 3 publications

References 57 publications

Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Blue Light‐Emitting Diodes Based on Pure Bromide Perovskites

Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals

Different temperature-dependent fluorescence properties of CsPbBr3 nanorods and nanowires

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Product

Resources

About

Shape-controlled synthesis of CsPbBr₃ nanorods with bright pure blue emission and high stability

Different temperature-dependent fluorescence properties of CsPbBr₃ nanorods and nanowires