HBr-mediated preparation of Cs4PbBr6/CsPbBr3 perovskites and green emission enhancement by Eu3+ doping

Liang, Wenchao; Li, Ting; Guo, Liandong; Zhu, Chunchun; Cheng, Haiying; Zhang, Kairui

doi:10.1016/j.matlet.2022.132392

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…Compared with the water-triggered transition from the Cs 4 PbBr 6 phase to CsPbBr 3 phase, neither 3 wt % nor 6 wt % CsBr solution improves the stability of the reversible phase transition, and the luminescence peak of blue shift still exists with the cycle number increasing. Meanwhile, it has been reported that HBr can be used to passivate and fill the defects generated during the phase transition process . Hence, we attempted to substitute CsPbBr 3 with CsPbBr 3 –HBr to facilitate the phase transition.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, it has been reported that HBr can be used to passivate and fill the defects generated during the phase transition process. 46 Hence, we attempted to substitute CsPbBr 3 with CsPbBr 3 −HBr to facilitate the phase transition. It is worth noting that CsPbBr 3 −HBr has reversible circulation characteristics whether induced by water or CsBr solution.…”

Section: Cs Pbbrmentioning

confidence: 99%

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CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

Xu,

Zhang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Luminescent perovskite nanocrystals (NCs), possessing the advantages of low cost, easy detection, and excellent luminescence, are becoming more and more significant in the fields of information encryption and decryption. Most hydrochromic perovskite NCs for information encryption have moderate reversibility and are easily passively decrypted by water in the moist air, limiting their practical applications. Herein, a lyochromic material is synthesized based on reversible phase transition between luminescent CsPbBr 3 −HBr (pretreating CsPbBr 3 with HBr) and nonluminescent Cs 4 PbBr 6 , exhibiting excellent reversibility in 50 cycles triggered by CsBr solution. HBr treatment boosts the ion migration of NCs via diminishing surface ligands and passivating Br vacancy, assisting CsBr concentration acting as a crucial factor in dynamic ion exchange equilibrium between the trigger solution and CsPbBr 3 −HBr. By utilizing CsPbBr 3 −HBr as a safety ink, the CsBr-triggered photoluminescence switch has been demonstrated to be reproducible, stable, and reliable for information encryption and decryption.

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Section: Resultsmentioning

confidence: 99%

Section: Cs Pbbrmentioning

confidence: 99%

CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

Xu,

Zhang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Stabilization of CsPbBr₃ Nanowires Through SU‐8 Encapsulation for the Fabrication of Bilayer Microswimmers with Magnetic and Fluorescence Properties

Wang,

Xiong,

Cai

et al. 2024

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All‐inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals have drawn great interest because of their excellent photophysical properties and potential applications. However, their poor stability in water greatly limited their use in applications that require stable structures. In this work, a facile approach to stabilize CsPbBr3 nanowires is developed by using SU‐8 as a protection medium; thereby creating stable CsPbBr3/SU‐8 microstructures. Through photolithography and layer‐by‐layer deposition, CsPbBr3/SU‐8 is used to fabricate bilayer achiral microswimmers (BAMs), which consist of a top CsPbBr3/SU‐8 layer and a bottom Fe3O4 magnetic layer. Compared to pure CsPbBr3 nanowires, the CsPbBr3/SU‐8 shows long‐term structural and fluorescence stability in water against ultrasonication treatment. Due to the magnetic layer, the motion of the microswimmers can be controlled precisely under a rotating magnetic field, allowing them to swim at low Reynolds number and tumble or roll on surfaces. Furthermore, CsPbBr3/SU‐8 can be used to fabricate various types of planar microstructures with high throughput, high consistency, and fluorescence properties. This work provides a method for the stabilization of CsPbBr3 and demonstrates the potential to mass fabricate planar microstructures with various shapes, which can be used in different applications such as microrobotics.

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HBr-mediated preparation of Cs4PbBr6/CsPbBr3 perovskites and green emission enhancement by Eu3+ doping

Cited by 2 publications

References 10 publications

CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

Stabilization of CsPbBr₃ Nanowires Through SU‐8 Encapsulation for the Fabrication of Bilayer Microswimmers with Magnetic and Fluorescence Properties

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HBr-mediated preparation of Cs4PbBr6/CsPbBr3 perovskites and green emission enhancement by Eu3+ doping

Cited by 2 publications

References 10 publications

CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

CsBr-Triggered Reversible Phase Transition of Perovskite Nanocrystals for Advanced Information Encryption and Decryption

Stabilization of CsPbBr3 Nanowires Through SU‐8 Encapsulation for the Fabrication of Bilayer Microswimmers with Magnetic and Fluorescence Properties

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Product

Resources

About

Stabilization of CsPbBr₃ Nanowires Through SU‐8 Encapsulation for the Fabrication of Bilayer Microswimmers with Magnetic and Fluorescence Properties