Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions
Quinten A. Akkerman,Valerio D’Innocenzo,Sara Accornero,Alice Scarpellini,Annamaria Petrozza,Mirko Prato,Liberato Manna +6 more
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TLDR
It is demonstrated that, via controlled anion exchange reactions using a range of different halide precursors, this approach gives access to perovskite semiconductor NCs with both structural and optical qualities comparable to those of directly synthesized NCs.Abstract:
We demonstrate that, via controlled anion exchange reactions using a range of different halide precursors, we can finely tune the chemical composition and the optical properties of presynthesized colloidal cesium lead halide perovskite nanocrystals (NCs), from green emitting CsPbBr3 to bright emitters in any other region of the visible spectrum, and back, by displacement of Cl– or I– ions and reinsertion of Br– ions. This approach gives access to perovskite semiconductor NCs with both structural and optical qualities comparable to those of directly synthesized NCs. We also show that anion exchange is a dynamic process that takes place in solution between NCs. Therefore, by mixing solutions containing perovskite NCs emitting in different spectral ranges (due to different halide compositions) their mutual fast exchange dynamics leads to homogenization in their composition, resulting in NCs emitting in a narrow spectral region that is intermediate between those of the parent nanoparticles.read more
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Recent advances and perspectives on light emitting diodes fabricated from halide metal perovskite nanocrystals
TL;DR: In this paper, the recent advancements in all-inorganic perovskite CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) have been reviewed.
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Photophysical properties of wavelength-tunable methylammonium lead halide perovskite nanocrystals
TL;DR: In this article, the time-correlated luminescence of isolated nanocrystals of five methylammonium lead mixed-halide perovskite compositions (CH3NH3PbBr3−xIx) were synthesized with varying iodide and bromide anion loading.
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Isotropic CsPbBr3 Perovskite Nanocrystals beyond Nanocubes: Growth and Optical Properties
TL;DR: In this article, the lead halide perovskite nanocrystals reported to date are mostly obtained in a six-faceted perfect cube shape, and extensive research has been carried out for intensifying and stab...
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Reverse Micelle Templating Route to Ordered Monodispersed Spherical Organo-Lead Halide Perovskite Nanoparticles for Light Emission
Lok Shu Hui,C. Beswick,A. Getachew,Herwig Heilbrunner,Kunyu Liang,Gregory Hanta,Ramis Arbi,Muhammad Bilal Munir,H. Dawood,N. Isik Goktas,Ray R. LaPierre,M. C. Scharber,Niyazi Serdar Sariciftci,Ayse Turak +13 more
TL;DR: In this paper, a facile room temperature synthesis method for high density monodispersed metal-organic halide perovskite nanoparticles using a diblock copolymer reverse micelle deposition (RMD) method is presented.
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Spinodal Decomposition During Anion Exchange in ColloidalMn 2+ -Doped CsPbX 3 (X = Cl, Br) Perovskite Nanocrystals
TL;DR: Manganese(II)-doped cesium-lead-chloride (Mn2+:CsPbCl3) perovskite nanocrystals have been developed as promising luminescent materials and attractive candidates for white-light generation.
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