A Single Nonblinking Cs<sub>4</sub>PbBr<sub>6</sub> Nanoparticle as a Nanothermometer

Lei, Yanyu; Yang, Jie; Hong, Daocheng; Wan, Sushu; Yan, Hua; Xie, Mingcai; Tang, Xiaosheng; Tian, Yuxi

doi:10.1002/cnma.201800619

Cited by 3 publications

(1 citation statement)

References 61 publications

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“…It has been reported that the Cs 4 PbBr 6 showed a linear decrease of PL intensity along with the augment of temperature. [ 219 ] The slopes of the PL intensity versus temperature were as high as 2% per degree centigrade. The ultrahigh sensitivity of Cs 4 PbBr 6 proved it to be the most likely candidate for use in thermometers for thermal detection.…”

Section: Applicationsmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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resistance against thermal-treatment compared to organic-inorganic hybrid lead halide perovskites (MAPbX 3 and FAPbX 3), due to the high thermal decomposition temperature of inorganic cations, thus drawing much attention. Owing to their impressive features, all-inorganic lead halide perovskites have been greatly useful in photovoltaic and optoelectronic applications, including solar cells, light-emitting diodes (LEDs), lasers, photodetectors and photocatalysis. [5-17] The conspicuous achievements in CsPbX 3 provoke the rapid development of its derivatives, Cs 4 PbX 6 and CsPb 2 X 5. These Cs x Pb y X z materials are composed of the same element compositions and [PbX 6 ] 4− unit cells. However, they possess completely different connectivity characters of [PbX 6 ] 4− octahedrons. CsPbX 3 is classified as a type of 3D perovskite, because [PbX 6 ] 4− octahedra are corner-shared along all three axes, while CsPb 2 X 5 has a sandwich-like arrangement with Cs + cations in between PbX 2 crystallographic planes, which can be regarded as a 2D phase. In Cs 4 PbX 6 , disconnected [PbBr 6 ] 4− octahedra are completely decoupled by Cs + cations. Among these three structures, CsPb 2 X 5 and Cs 4 PbX 6 , with dimensional-network less than 3 are referred to as lowdimensional-networked cesium lead halide perovskites. Besides the connectivity, these structures can be understood from a confinement perspective. CsPbX 3 is not confined in any dimension such that it can be considered as a 3D networked semiconductor. CsPb 2 X 5 and Cs 4 PbX 6 are confined in one dimension and all three dimensions, hence the name 2D and 0D structures, respectively. [18,19] In CsPb 2 X 5 and Cs 4 PbX 6 , the excitons cannot dissociate easily within all dimensions; instead, they are confined in the PbX 2 planes and individual [PbX 6 ] 4− units, respectively, resulting in larger bandgaps compared to the traditional ABX 3 phase. Figure 1 illustrates these three structures with different dimensions. Until now, comprehensive accounts of these Cs x Pb y X z materials have been made. However, most recent research focuses on CsPbX 3 , which has excellent optical properties and promising potential in various applications. Its derivatives, CsPb 2 X 5 and Cs 4 PbX 6 have achieved tremendous progress but are still far behind that of CsPbX 3. Many problems still seriously limit the rapid development of these low-dimensional-networked perovskites, a typical one being the debate on the origin of their luminescence. In this Review article, we focus on Cs 4 PbX 6 and CsPb 2 X 5 , and attempt to unveil their features, potential in All-inorganic cesium lead halide perovskites have emerged as promising optoelectronic materials with excellent photophysical properties and great potential in a variety of applications. In parallel with the most investigated CsPbX 3 , its derivates, Cs 4 PbX 6 and CsPb 2 X 5 , with low-dimensional-networked structures have also attracted great attention. In this review, recent advancements on the low-dimensional-networked cesium lead halide perovs...

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Section: Applicationsmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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Photoluminescence Origin of Zero-Dimensional Cs₄PbBr₆ Perovskite

et al. 2019

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Green-emitting zero-dimensional perovskite Cs 4 PbBr 6 , consisting of an array of isolated [PbBr 6 ] 4− octahedra, has drawn a magnitude of interest due to its peculiar yet robust photoluminescence properties. Given many advances in the past few years, the true nature of the unusual green emission from a wide-bandgap Cs 4 PbBr 6 remains elusive. Although a number of reviews have been published on this subject, the emerging evidence motivates us to summarize the rapid progress about the debate, whereby critical comments were made to either rationalize or question each point of view. This Review summarizes the latest findings on the PL origins covering both CsPbBr 3 impurity and defect theories. Specifically, the chemical nature of the defects, including Br vacancies, polybromide, self-trapped excitons, and interstitial molecules, is discussed. The phase transformation between CsPbBr 3 and Cs 4 PbBr 6 is particularly stressed because it has brought more cloud on the PL puzzle. Finally, we discuss the potential application of this material and envisioned several future directions that may clarify the mechanism of PL.

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Optical trapping and manipulation for single-particle spectroscopy and microscopy

Chen

Cai

Liu

et al. 2022

The Journal of Chemical Physics

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Optical tweezers can control the position and orientation of individual colloidal particles in solution. Such control is often desirable but challenging for single-particle spectroscopy and microscopy, especially at the nanoscale. Functional nanoparticles that are optically trapped and manipulated in a three-dimensional (3D) space can serve as freestanding nanoprobes, which provide unique prospects of sensing and mapping the surrounding environment of the nanoparticles and studying their interactions with biological systems. In this perspective, we will first describe the optical forces underlying the optical trapping and manipulation of microscopic particles, then review the combinations and applications of different spectroscopy and microscopy techniques with optical tweezers. Finally, we will discuss the challenges of performing spectroscopy and microscopy on single nanoparticles with optical tweezers, the possible routes to address these challenges, and the new opportunities that will arise.

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A Single Nonblinking Cs₄PbBr₆ Nanoparticle as a Nanothermometer

Cited by 3 publications

References 61 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Photoluminescence Origin of Zero-Dimensional Cs₄PbBr₆ Perovskite

Optical trapping and manipulation for single-particle spectroscopy and microscopy

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A Single Nonblinking Cs4PbBr6 Nanoparticle as a Nanothermometer

Cited by 3 publications

References 61 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Photoluminescence Origin of Zero-Dimensional Cs4PbBr6 Perovskite

Optical trapping and manipulation for single-particle spectroscopy and microscopy

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Product

Resources

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A Single Nonblinking Cs₄PbBr₆ Nanoparticle as a Nanothermometer

Photoluminescence Origin of Zero-Dimensional Cs₄PbBr₆ Perovskite