Organic solvent-free lyophilization assisted recrystallization synthesis of high-purity green emissive Cs3MnX5 (X = I, Br)

Kwon, Seok Bin; Choi, Seung Hee; Yoo, Jung Hyeon; Kim, Bo Young; Kang, Bong Kyun; Song, Young Hoon; Yoon, Dae Ho

doi:10.1016/j.jallcom.2020.156324

Cited by 29 publications

(21 citation statements)

References 44 publications

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“…It is worth pointing out that luminous tetrahedra, instead of small-sized, nonluminous ions (Cs + , CH 3 NH 4 + ), central Mn divalent cation (M site) surrounded by four Br anions with larger size fill the voids. Similar crystal structures can also be observed in [MnCl 4 ]ClCs 3 (Tables S3 and S4) and [MnI 4 ]ICs 3 . Therefore, they can all be regarded as the unique antiperovskite with the general formula of [MX 4 ]XA 3 .…”

supporting

confidence: 66%

“…Similar crystal structures can also be observed in [MnCl 4 ]ClCs 3 (Tables S3 and S4) and [MnI 4 ]ICs 3 . 45 Therefore, they can all be regarded as the unique antiperovskite with the general formula of [MX 4 ]XA 3 . Interestingly, in compound [MX 4 ]XA 3 , the 3D continuous antiperovskite manifests 0D electronic structure by separating tetrahedra in the voids between octahedra.…”

mentioning

confidence: 98%

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Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

et al. 2021

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The formability of antiperovskite [MX4]XA3-type (A(I) = alkali metals; M(II) = transition metals; X = Cl, Br, I) can be predicted by building the analysis theory. To validate the prediction model, a series of cesium–manganese antiperovskite single crystals with different halogen mixing ratios were synthesized, which not only have [MX4]XA3-type structures but also are ideal luminescent materials. As the most pure green emission fluorescent antiperovskite, [MnCl2Br2]BrCs3 shows 520 nm emission with the high photoluminescence quantum yield (93.5%) at room temperature and ultrastable luminescent color from 77 to 523 K due to the strict confinement of high-density luminescent centers. By fabricating the perovskite film with the double-source thermal evaporation method, the first all-inorganic cesium–manganese halide antiperovskite light-emitting diode is reported, with maximum external quantum efficiency up to 12.5%, maximum luminance up to 3990 cd m–2, and half-life of 756 min operated at 5.0 V.

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confidence: 66%

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confidence: 98%

Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

et al. 2021

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“…In an earlier research, organic–inorganic 0D Mn 2+ -based halides were reported as excellent candidates for narrow-band green emitters, with high PLQY and fast decay time. − However, the poor environmental stability of their organic-based composition limits their use in display applications. Recently, other groups have suggested the development of all-inorganic Mn 2+ -based halides to form narrow-band G, R emitters for color-by-blue display applications; − such materials have relatively high PLQY, excellent stability, and relatively short radiative PL decay times. In this regard, quite recently, cesium manganese(II) halide NCs and phosphors have attracted researchers’ attention for use as eco-friendly G, R emitters with strong PL.…”

Section: Introductionmentioning

confidence: 99%

“…Cs 3 MnBr 5 NCs and powder phosphors have been reported to show a strong green emission peak at 520 nm, with a narrow fwhm of 39–43 nm and a fast PL decay time of 290 μs. So far, the maximum PLQYs of Cs 3 MnBr 5 powder phosphors and NCs have reached 74.9 and 48%, respectively. As summarized in Table , both Cs 3 MnBr 5 G and CsMnBr 3 R powders are synthesized using various crystallization approaches, such as HBr solution-based evaporative crystallization, lyophilization-assisted recrystallization (LARC), and a mechano-solid state reaction .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Park

Kim

et al. 2022

ACS Omega

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Green (G) and red (R) light-emitting materials, such as quantum dots, perovskite nanocrystals, and inorganic phosphor powders, owing to their excellent optical characteristics, have attracted researchers’ attention as color-conversion materials for lighting and display applications. However, these materials contain environmentally harmful elements, such as Pb or Cd, and/or they are synthesized using environmentally harmful synthetic approaches and conditions, involving the use of organic solvents, high pressure, high temperature, harsh atmosphere, and long reaction time. In this study, as an eco-friendly synthetic approach to synthesize lead-free Cs 3 MnBr 5 G powder phosphor, we suggest an evaporative crystallization process of aqueous reactant solution. This synthetic process does not use toxic elements or solvents and the crystallization process utilizes only low reaction temperature and short reaction time under air atmosphere conditions. We successfully synthesized Cs 3 MnBr 5 green powder phosphor, with excellent optical properties, by evaporative heating of a 200 nm syringe-filtered solution at 150 °C for 2 h. The synthesized Cs 3 MnBr 5 phosphors have a photoluminescence quantum yield of 66.3%, a peak wavelength of 520 nm, a narrow bandwidth of 38 nm, and a photoluminescence decay time of 0.34 ms under blue excitation. This phosphor is expected to be a useful alternative G-emitting material that can compete with commercial green quantum dots, perovskite nanocrystals, or inorganic phosphors.

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“…Mn has an ionic radius (0.083 nm for 6 coordination) similar to that of Pb (0.119 nm for 6 coordination), as well as a low toxicity, and has therefore attracted attention as a substitute for the B site in halide perovskites. Cesium manganese bromide perovskite nanocrystals, such as the red-emitting CsMnBr 3 and green-emitting Cs 3 MnBr 5 , have been reported to exhibit excellent optical properties [20][21][22][23]. In this paper, we synthesized red-emitting CsMnBr 3 and Cs 3 MnBr 5 perovskite nanocrystals using the modi ed hot-injection method and investigated the optical properties of these perovskite nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Discovery of the Crystal Phase Transition on Lead-free Cesium Manganese Bromine Perovskite Nanocrystal by Solvent Concentration

Kang¹,

Choi²,

Park³

et al. 2021

Preprint

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We have been demonstrated the crystal phase transition for lead-free cesium manganese bromine perovskite nanocrystal synthesized by the modified hot-injection method due to change the concentration of solvent (trioctylphosphine; TOP). The compositions to be synthesized were determined by the amount of TOP solvent, and the structure phase of nanocrystal was changed from hexagonal CsMnBr3 to tetragonal Cs3MnBr5 as the amount of TOP solvent increased. The emission peaks of CsMnBr3 and Cs3MnBr5 nanocrystals were observed at 650 nm (red) and 520 nm (green), respectively. After a durability test at 85 °C and 85% humidity for 24 h, the lead-free perovskite CsMnBr3 nanocrystal powder maintained its initial emission intensity, and the metal halide Cs3MnBr5 nanocrystal powder exhibited an increase in red emission due to the post-synthesis of CsMnBr3 nanocrystals.

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Organic solvent-free lyophilization assisted recrystallization synthesis of high-purity green emissive Cs3MnX5 (X = I, Br)

Cited by 29 publications

References 44 publications

Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Discovery of the Crystal Phase Transition on Lead-free Cesium Manganese Bromine Perovskite Nanocrystal by Solvent Concentration

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Organic solvent-free lyophilization assisted recrystallization synthesis of high-purity green emissive Cs3MnX5 (X = I, Br)

Cited by 29 publications

References 44 publications

Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

Synthesis of Cs3MnBr5 Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Discovery of the Crystal Phase Transition on Lead-free Cesium Manganese Bromine Perovskite Nanocrystal by Solvent Concentration

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Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process