2D/3D heterostructure derived from phase transformation of 0D perovskite for random lasing applications with remarkably improved water resistance

Sun, Xun; Shi, Xinmin; Zhang, Weiguang; Xu, Baoyuan; Gao, Zhenhua; Wang, Zifei; Wang, Xue; Meng, Xianwei

doi:10.1039/d1nr06084h

Cited by 11 publications

(7 citation statements)

References 36 publications

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“…The optical absorption spectrum appears as a broad band with two minor peaks located at ∼215 and 328 nm as well as a shoulder at ∼522 nm. The minor absorption peaks at ∼215 and 328 nm can be related to electronic transitions confined in the [PbBr 6 ] 4− units in CsPb 2 Br 5 , 31 while the absorption shoulder at ∼522 nm can be ascribed to CsPbBr 3 . The PL spectrum is centered at ∼533 nm with a spectral line width of ∼23 nm.…”

Section: Resultsmentioning

confidence: 99%

Confining Light in Porous Perovskite Heterostructures for Light Amplification

et al. 2022

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Nanostructured porous media are capable of modulating light transport via diffusion or localization, while their combination with optical gain offers a solution to creating coherent light sources. Herein, we report on the development of a new class of optically active porous medium−porous perovskite heterostructures and demonstrate their potential in confining light via strong scattering for light amplification. Such heterostructures are chemically composed of 2D-networked CsPb 2 Br 5 and 3Dnetworked CsPbBr 3 , which are attained upon direct water stimuli of 0D-networked Cs 4 PbBr 6 . Optical imaging reveals that light trajectories due to whispering gallery modes are formed in Cs 4 PbBr 6 resonators to offer optical feedback for lasing. In contrast, light scattering due to structural inhomogeneity suppresses whispering gallery modes in porous heterostructures, while light is mainly confined in the pumping region. Despite the poor definition of microscopic cavities due to local disorder, the pump threshold of the porous heterostructure is only 1/3 to 1/5 that of Cs 4 PbBr 6 and comparable to that of CsPbBr 3 reported previously. Eigenvalue modeling was performed to analyze the eigenmodes, revealing that porous perovskite heterostructures support high-quality eigenmodes for lasing. The results suggest that perovskite heterostructures with interconnected porous scaffolds serve as promising complex nanophotonic systems for fundamental studies and potential applications.

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Section: Resultsmentioning

confidence: 99%

Confining Light in Porous Perovskite Heterostructures for Light Amplification

et al. 2022

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“…Therefore, the ligand-free CPB-CP/BA MCs are expected to serve as a water sensor in the ocean industry. 38 BA was replaced with various organic amines to investigate the function of organic amines in controlling the size and quantum confinement of 0D perovskite Cs 4 PbBr 6 crystals. Similar time-dependent changes were seen in the emission spectra of samples obtained in the presence of organic amines such as HA (6C), OA (8C), and CA (6C); other experimental parameters were held constant including CP (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the ligand-free CPB-CP/BA MCs are expected to serve as a water sensor in the ocean industry. 38…”

Section: Resultsmentioning

confidence: 99%

Evaporation-induced nano- to micro-sized transformation of photoluminescent Cs₄PbBr₆ crystals

et al. 2022

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“…Sun et al discovered a new phenomenon where 0D Cs 4 PbBr 6 can be converted into 2D/3D CsPb 2 Br 5 /CsPbBr 3 halide perovskite heterostructures by exposing it to water at room temperature . The derived 2D/3D composite maintained a narrow-band green light emitting feature at 518 nm which is characteristic of the band-edge transition of CsPbBr 3 (as shown in Figure c).…”

Section: Synergistic Applications Of Mixed 3d-2d Halide Perovskitesmentioning

confidence: 99%

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

Metcalf,

Sidhik,

Zhang

et al. 2023

Chem. Rev.

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Three-dimensional (3D) organic–inorganic lead halide perovskites have emerged in the past few years as a promising material for low-cost, high-efficiency optoelectronic devices. Spurred by this recent interest, several subclasses of halide perovskites such as two-dimensional (2D) halide perovskites have begun to play a significant role in advancing the fundamental understanding of the structural, chemical, and physical properties of halide perovskites, which are technologically relevant. While the chemistry of these 2D materials is similar to that of the 3D halide perovskites, their layered structure with a hybrid organic–inorganic interface induces new emergent properties that can significantly or sometimes subtly be important. Synergistic properties can be realized in systems that combine different materials exhibiting different dimensionalities by exploiting their intrinsic compatibility. In many cases, the weaknesses of each material can be alleviated in heteroarchitectures. For example, 3D-2D halide perovskites can demonstrate novel behavior that neither material would be capable of separately. This review describes how the structural differences between 3D halide perovskites and 2D halide perovskites give rise to their disparate materials properties, discusses strategies for realizing mixed-dimensional systems of various architectures through solution-processing techniques, and presents a comprehensive outlook for the use of 3D-2D systems in solar cells. Finally, we investigate applications of 3D-2D systems beyond photovoltaics and offer our perspective on mixed-dimensional perovskite systems as semiconductor materials with unrivaled tunability, efficiency, and technologically relevant durability.

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2D/3D heterostructure derived from phase transformation of 0D perovskite for random lasing applications with remarkably improved water resistance

Abstract: Phase transformation between metal halide perovskites serves as a promising route to create new optoelectronic functionality. Nevertheless, such transformation reported thus far mainly involves transition between two individual phases (e.g.,...

Cited by 11 publications

References 36 publications

Confining Light in Porous Perovskite Heterostructures for Light Amplification

Confining Light in Porous Perovskite Heterostructures for Light Amplification

Evaporation-induced nano- to micro-sized transformation of photoluminescent Cs₄PbBr₆ crystals

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

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2D/3D heterostructure derived from phase transformation of 0D perovskite for random lasing applications with remarkably improved water resistance

Abstract: Phase transformation between metal halide perovskites serves as a promising route to create new optoelectronic functionality. Nevertheless, such transformation reported thus far mainly involves transition between two individual phases (e.g.,...

Cited by 11 publications

References 36 publications

Confining Light in Porous Perovskite Heterostructures for Light Amplification

Confining Light in Porous Perovskite Heterostructures for Light Amplification

Evaporation-induced nano- to micro-sized transformation of photoluminescent Cs4PbBr6 crystals

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

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Product

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Evaporation-induced nano- to micro-sized transformation of photoluminescent Cs₄PbBr₆ crystals