Enhanced luminescence properties and device applications of Tb3+-doped Cs4PbBr6 perovskite quantum dot glass

Li, Shasha; Liu, Guanchen; Lin, Hai; Li, Chun; Zeng, Fanming; Lin, Jingquan; Xiang, Weidong

doi:10.1016/j.ceramint.2022.09.340

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…This fact makes the A 4 PbX 6 phase often referred to as a zero-dimensional (0D) perovskite. − The optical properties of such crystals closely resemble those of individual [PbX 6 ] 4– clusters observed experimentally in halide salts doped with Pb 2+ ions. While the 3D and 2D phases of LHPs are well studied and reported, the 0D perovskites are comparatively less explored, with only very recent works revisiting the optical properties of Cs 4 PbBr 6 nanocrystals. − …”

Section: Introductionmentioning

confidence: 99%

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry

Abia,

López,

Gainza

et al. 2023

ACS Appl. Mater. Interfaces

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Despite the great success of hybrid CH 3 NH 3 PbI 3 perovskite in photovoltaics, ascribed to its excellent optical absorption properties, its instability toward moisture is still an insurmountable drawback. All-inorganic perovskites are much less sensitive to humidity and have potential interest for solar cell applications. Alternative strategies have been developed to design novel materials with appealing properties, which include different topologies for the octahedral arrangements from three-dimensional (3D, e.g., CsPbBr 3 perovskite) or two-dimensional (2D, e.g., CsPb 2 Br 5 ) to zero-dimensional (0D, i.e., without connection between octahedra), as the case of Cs 4 PbX 6 (X = Br, I) halides. The crystal structure of these materials is complex, and their thermal evolution is unexplored. In this work, we describe the synthesis of Cs 4 PbBr 6−x I x (x = 0, 2, 4, 6) halides by mechanochemical procedures with green credentials; these specimens display excellent crystallinity enabling a detailed structural investigation from synchrotron X-ray powder diffraction (SXRD) data, essential to revisit some features in the temperature range of 90−298 K. In all this regime, the structure is defined in the trigonal R3̅ c space group (#167). The presence of Cs and X vacancies suggests some ionic mobility into the crystal structure of these 0D halides. Bond valence maps (BVMs) are useful in determining isovalent surfaces for both Cs 4 PbBr 6 and Cs 4 PbI 6 phases, unveiling the likely ionic pathways for cesium and bromide ions and showing a full 3D connection in the bromide phase, in contrast to the iodide one. On the other hand, the evolution of the anisotropic displacement parameters is useful to evaluate the Debye temperatures, confirming that Cs atoms have more freedom to move, while Pb is more confined at its site, likely due to a higher covalency degree in Pb−X bonds than that in Cs−X bonds. Diffuse reflectance ultraviolet−visible (UV−vis) spectroscopy shows that the optical band gap can be tuned depending on iodine content (x) in the range of 3.6−3.06 eV. From density functional theory (DFT) simulations, the general trend of reducing the band gap when Br is replaced by I is well reproduced.

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Section: Introductionmentioning

confidence: 99%

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry

Abia,

López,

Gainza

et al. 2023

ACS Appl. Mater. Interfaces

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Ca2+ and Tm3+ co-doped CsPbBr3 quantum dot glass achieves efficient luminescence and long-term stable

Dong,

Wang,

Zhu

et al. 2024

Optical Materials

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Eu3+-doped Cs4PbBr6 quantum dots incorporated into borogermanate glass-ceramics for optical temperature sensing

Wang,

Yao,

Zhao

et al. 2024

Optical Materials

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Enhanced luminescence properties and device applications of Tb3+-doped Cs4PbBr6 perovskite quantum dot glass

Cited by 4 publications

References 34 publications

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry

Ca2+ and Tm3+ co-doped CsPbBr3 quantum dot glass achieves efficient luminescence and long-term stable

Eu3+-doped Cs4PbBr6 quantum dots incorporated into borogermanate glass-ceramics for optical temperature sensing

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Enhanced luminescence properties and device applications of Tb3+-doped Cs4PbBr6 perovskite quantum dot glass

Cited by 4 publications

References 34 publications

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs4PbBr6–xIx Obtained by Mechanochemistry

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs4PbBr6–xIx Obtained by Mechanochemistry

Ca2+ and Tm3+ co-doped CsPbBr3 quantum dot glass achieves efficient luminescence and long-term stable

Eu3+-doped Cs4PbBr6 quantum dots incorporated into borogermanate glass-ceramics for optical temperature sensing

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Product

Resources

About

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry

Structural Features and Optical Properties of All-Inorganic Zero-Dimensional Halides Cs₄PbBr_6–xI_x Obtained by Mechanochemistry