2021
DOI: 10.1002/adfm.202106871
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Perovskite Anion Exchange: A Microdynamics Model and a Polar Adsorption Strategy for Precise Control of Luminescence Color

Abstract: Inorganic perovskite quantum dots (QDs) have natural advantages in the field of light-emitting diodes (LEDs) because of their high color purity and tunability in a wide range. However, when manufacturing efficiently mixedanion perovskite QDs (CsPbBr x I 3−x ) to meet the requirements of the pure red color standard in the display field (≈630 nm), results are difficult to control accurately due to the lack of exploration of its microscopic mechanism. Here, a microdynamics model is constructed for anion exchange … Show more

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Cited by 67 publications
(53 citation statements)
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“…[ 1–7 ] By virtue of tunable emission peaks across visible spectrum photoluminescence quantum yield (PLQY), narrow half‐width, wide color gamut (≈140%), and the high photoluminescence quantum yield, organic PeQD light‐emitting diodes (PeQLEDs) have attracted significant attention. [ 8–12 ] Recently, great breakthroughs have been achieved in the synthesis and performance of green‐ and red‐emitting PeQLEDs in recent years, [ 13–22 ] whereas the low performance of blue‐emitting PeQLEDs (wavelength range: 460–490 nm) impedes the development of commercial display applications for PeQLEDs. [ 23–27 ]…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…[ 1–7 ] By virtue of tunable emission peaks across visible spectrum photoluminescence quantum yield (PLQY), narrow half‐width, wide color gamut (≈140%), and the high photoluminescence quantum yield, organic PeQD light‐emitting diodes (PeQLEDs) have attracted significant attention. [ 8–12 ] Recently, great breakthroughs have been achieved in the synthesis and performance of green‐ and red‐emitting PeQLEDs in recent years, [ 13–22 ] whereas the low performance of blue‐emitting PeQLEDs (wavelength range: 460–490 nm) impedes the development of commercial display applications for PeQLEDs. [ 23–27 ]…”
Section: Introductionmentioning
confidence: 99%
“…
performance of green-and red-emitting PeQLEDs in recent years, [13][14][15][16][17][18][19][20][21][22] whereas the low performance of blue-emitting PeQLEDs (wavelength range: 460-490 nm) impedes the development of commercial display applications for PeQLEDs. [23][24][25][26][27] The entire blue spectra are expected to be obtained by controlling the Br/Cl ratio in inorganic blue-emitting PeQDs (CsPb(Br x /Cl 1−x ) 3 ).
…”
mentioning
confidence: 99%
“…9 On the other hand, the slow decay τ 2 of the PAN/ MAPbBr 3 nanofiber film associated with the radiation composite is 262.64 ns, which is larger than that of MAPbBr 3 PNCs at 179.16 ns. 38 Therefore, it is clear that the PAN polymer in the PAN/MAPbBr 3 nanofiber film enhances the fluorescence lifetime of MAPbBr 3 . We speculated that the enhanced fluorescence lifetime may be attributed to the limited ion migration and energy transfer of MAPbBr 3 PNCs in the polymer matrix.…”
Section: Morphological and Structural Characterization Of The Pan/ Ma...mentioning
confidence: 98%
“…Cesium lead halide (CsPbX 3 , X = Cl, Br, and I) perovskite nanocrystals (NCs) have attracted great attention due to their outstanding photoelectric properties and promising applications in illumination, photo­(electro)­catalysis, and solar cells. Interestingly, CsPbX 3 NCs’ band gaps and thus optical and electrical properties can be modulated by adjusting the proportion of halide atoms (Cl, Br, and I), which can be easily achieved by anion exchange in the postsynthesis process via mixing CsPbCl 3 , CsPbBr 3 , and CsPbI 3 NCs in appropriate ratios or mixing the solutions of NCs with halide anion precursors. Many halide precursors have been utilized and investigated, including hydrohalic acids or halide gas precursors, , halide ammonium salts, ,,, trimethylsilyl halide reagents, , tetrafluoroborate halide salts, and inorganic metal halides. ,, Unfortunately, perovskite NCs are unstable in polar solvents. , These precursors for anion exchange and polar solvents needed for dissolving them, usually aliphatic alcohols or N , N -dimethylformamide (DMF), often cause decomposition or undesired deformation of perovskite NCs. Therefore, using inert halide precursors, for example, haloalkanes, is of high interest.…”
Section: Introductionmentioning
confidence: 99%