Tailoring of Photoluminescence Properties in All-Vacuum Deposited Perovskite via Ruddlesden-Popper Faults

Liang Wang; Luying Li; Shuangfeng JiaWeiwei MengYongfa ChengZunyu LiuLi LiShuwen YanYihua GaoJianbo WangJiang Tang

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Tailoring of Photoluminescence Properties in All-Vacuum Deposited Perovskite via Ruddlesden-Popper Faults

机译：Tailoring of Photoluminescence Properties in All-Vacuum Deposited Perovskite via Ruddlesden-Popper Faults

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Ruddlesden-Popper (RP) faults are well known in oxide perovskites, and arealso observed in promising metal halide perovskites. However, the effectof RP faults on optical properties of perovskite has not been systematicallyinvestigated. In this study, it is found that RP faults are common planar faultsin all-vacuum deposited CsPbBr_3-based perovskite polycrystal thin films, andthe density of RP planar faults can be greatly increased by non-stoichiometriccomposition (Cs-rich) as well as reduced dimensionality (quasi-2D) strategies.The photoluminescence (PL) measurement reveals monotonically increasingpeak intensities with higher densities of RP planar faults from Cs-rich,quasi-2D to Cs-rich & quasi-2D samples. The corresponding atomic-scaledifferential phase contrast maps indicate strongly confined charges withinthe RP planar fault network, which explains well the relationship between PLenhancement and the density of RP planar faults, and offers an alternativepathway for tailoring the optoelectronic properties of perovskite.

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来源
《Advanced functional materials》 |2023年第6期|2210286.1-2210286.9|共9页
作者
Liang Wang; Luying Li; Shuangfeng JiaWeiwei MengYongfa ChengZunyu LiuLi LiShuwen YanYihua GaoJianbo WangJiang Tang;
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Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan, Hubei 430074, China;

Center for Electron Microscopy MOE Key Laboratory of Artificial Micro- and Nano-Structures, the Institute for Advanced Studies, and School of Physics and Technology Wuhan University Wuhan, Hubei 430072, China;

Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan, Hubei 430074, China,Optics Valley Laboratory 1037 Luoyu Road, Wuhan, Hubei 430074, China;

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all-vacuum depositions; CsPbBr3 polycrystal thin films; differential phase contrast; Ruddlesden-Popper planar faults; scanning transmission electron microscopy;

Tailoring of Photoluminescence Properties in All-Vacuum Deposited Perovskite via Ruddlesden-Popper Faults

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