Reversible Release and Fixation of Bromine in Vacancy‐Ordered Bromide Perovskites

Lin, Yuanzhang; Xia, Bing; Hu, Shanshan; Zhong, Yu; Huang, Yue‐E; Zhang, Zhizhuan; Wu, Ni; Wu, Yongwei; Wu, Xiaohui; Huang, Xiaoying; Xiao, Zewen; Du, Ke‐Zhao

doi:10.1002/eem2.12082

Cited by 27 publications

(16 citation statements)

References 69 publications

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“…Metal halide perovskites have received widespread attention in recent years attributing to their impressive photoelectric performances such as solar cells , and photodetectors. − In addition, perovskite structures and applications are greatly extended including ferroelectricity, bromine storage, and broad photoluminescence (PL). − Several mechanisms can lead to the broad emission in a single-phase halide perovskite . One is the self-trapped excitons (STE).…”

Section: Introductionmentioning

confidence: 99%

Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure

et al. 2021

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Bi3+/Te4+ co-doped Cs2SnCl6 with dual emission spectrum (i.e., 450 and 575 nm) was achieved by a modified solution method, which can overcome the phase separation in the previous method for Cs2SnCl6 crystal growth. The two emission peaks arising from the two dopants Bi3+ and Te4+ have distinct photoluminescence (PL) lifetimes. Thus, the control of dopant ratio or PL delay time will regulate the PL intensity ratio between 450 and 575 nm peaks leading to adjustable emission color. The energy transfer between the two emission centers, which is confirmed by the optical spectra and PL lifetime, has a critical distance around 7.8 nm with a maximum of 50% transfer efficiency. The Bi3+/Te4+ co-doped Cs2SnCl6 with superior stability in water and aqua regia was fabricated into a single-phase white light-emitting diode. In the meantime, various luminescent heterostructures were obtained by epitaxial Cs2SnCl6 crystal growth with different dopants, which can broaden the study of composition engineering in halide perovskites.

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Section: Introductionmentioning

confidence: 99%

Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure

et al. 2021

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“…Metal halides, especially metal halide perovskites, have attracted enormous attention for their superior opto/electronic performance. − Among them, zero-dimensional (0D) organic–inorganic metal halides (OIMHs) show distinctive advantages in the rich combination of components. − By designing the inorganic and organic components of OIMH crystal, dimensionally reduced crystallographic/electronic structures would exhibit quantum confinement effect that can lead to different optical properties from the bulk. − For example, 0D OIMHs based on n s 2 ions (mainly Pb 2+ , Sn 2+ , Sb 3+ , Bi 3+ , Te 4+ ) can exhibit self-trapped excitons (STEs) photoluminescence (PL) due to soft lattice and strong electron–phonon coupling, emitting photons with broad emission, large Stokes shift and high efficiency. − Therefore, 0D OIMHs have been developed in flourishing optical applications such as X-ray scintillator, thermography, and optical waveguides. − More importantly, weak intermolecular/ionic interactions might endow 0D OIMHs with switchable structure and PL. − ,− …”

Section: Introductionmentioning

confidence: 99%

Selective Luminescence Response of a Zero-Dimensional Hybrid Antimony(III) Halide to Solvent Molecules: Size-Effect and Supramolecular Interactions

Peng

Jin

et al. 2021

Inorg. Chem.

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Zero-dimensional (0D) metal halides with solid-state luminescence switching (SSLS) have attracted attention as sensors and luminescent anticounterfeiting. Herein, selective solvent molecule response and accordingly luminescence switching were discovered in 0D [EtPPh 3 ] 2 [SbCl 5 ] (1, EtPPh 3 = ethyltriphenylphosphonium). More than a dozen kinds of solvent molecules have been tested to find out the selection rule for molecule absorption in 1, which is demonstrated to be the size effect of guest molecules. Confirmed by crystal structural analysis, only the solvents with molecular volume less than 22.3 Å 3 could be accommodated in 1 leading to the solvatochromic photoluminescence (PL). The mechanism of solvatochromic PL was also deeply studied, which was found to be closely related to the supramolecular interactions between solvent molecules and the host material. Different functional groups of the solvent molecule can affect its strength of hydrogen bonding with [SbCl 5 ] 2− , which is crucial for the distortion level of [SbCl 5 ] 2− unit and thus results in not only distinct solvatochromic PL but also distinct thermochromic PL. In addition, they all show typical self-trapped exciton triplet emissions. The additional supramolecular interactions from guest molecules can enhance the photoluminescence quantum yield to be as high as 95%.

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“…The corresponding UV-vis absorption spectra further demonstrates no absorption peaks of Br 3 À at 280 nm and I 3 À at 350 nm in NFTOS. [15] The results show that the biphasic electrolytes can significantly suppress the shuttle effect of both organic and inorganic RMs in a static environment.…”

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confidence: 89%

Biphasic Electrolyte Inhibiting the Shuttle Effect of Redox Molecules in Lithium‐Metal Batteries

et al. 2021

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Redox molecules (RMs) as electron carriers have been widely used in electrochemical energy-storage devices (ESDs), such as lithium redox flow batteries and lithium-O 2 batteries. Unfortunately, migration of RMs to the lithium (Li) anode leads to side reactions, resulting in reduced coulombic efficiency and early cell death. Our proof-of-concept study utilizes a biphasic organic electrolyte to resolve this issue, in which nonafluoro-1,1,2,2-tetrahydrohexyl-trimethoxysilane (NFTOS) and ether (or sulfone) with lithium bis(trifluoromethane)sulfonimide (LiTFSI) can be separated to form the immiscible anolyte and catholyte. RMs are extracted to the catholyte due to the enormous solubility coefficients in the biphasic electrolytes with high and low polarity, resulting in inhibition of the shuttle effect. When coupled with a lithium anode, the Li-Li symmetric, Li redox flow and Li-O 2 batteries can achieve considerably prolonged cycle life with biphasic electrolytes. This concept provides a promising strategy to suppress the shuttle effect of RMs in ESDs.

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Reversible Release and Fixation of Bromine in Vacancy‐Ordered Bromide Perovskites

Abstract: The authors Yang-Peng Lin and Bing Xia contributed equally.

Cited by 27 publications

References 69 publications

Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure

Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure

Selective Luminescence Response of a Zero-Dimensional Hybrid Antimony(III) Halide to Solvent Molecules: Size-Effect and Supramolecular Interactions

Biphasic Electrolyte Inhibiting the Shuttle Effect of Redox Molecules in Lithium‐Metal Batteries

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Reversible Release and Fixation of Bromine in Vacancy‐Ordered Bromide Perovskites

Abstract: The authors Yang-Peng Lin and Bing Xia contributed equally.

Cited by 27 publications

References 69 publications

Multi-Dopant Engineering in Perovskite Cs2SnCl6: White Light Emitter and Spatially Luminescent Heterostructure

Multi-Dopant Engineering in Perovskite Cs2SnCl6: White Light Emitter and Spatially Luminescent Heterostructure

Selective Luminescence Response of a Zero-Dimensional Hybrid Antimony(III) Halide to Solvent Molecules: Size-Effect and Supramolecular Interactions

Biphasic Electrolyte Inhibiting the Shuttle Effect of Redox Molecules in Lithium‐Metal Batteries

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Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure

Multi-Dopant Engineering in Perovskite Cs₂SnCl₆: White Light Emitter and Spatially Luminescent Heterostructure