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
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
Perovskite Nanocrystals as a Color Converter for Visible Light Communication
Ibrahim Dursun,Chao Shen,Manas R. Parida,Jun Pan,Smritakshi P. Sarmah,Davide Priante,Noktan M. Alyami,Jiakai Liu,Makhsud I. Saidaminov,Mohd Sharizal Alias,Ahmed L. Abdelhady,Tien Khee Ng,Omar F. Mohammed,Boon S. Ooi,Osman M. Bakr +14 more
TL;DR: In this article, a solution-processed CsPbBr3 perovskite nanocrystals (NCs) with a conventional red phosphor were used to achieve a high data rate of up to 2 Gbit/s.
Journal ArticleDOI
Polar-solvent-free colloidal synthesis of highly luminescent alkylammonium lead halide perovskite nanocrystals
Oleh Vybornyi,Oleh Vybornyi,Sergii Yakunin,Sergii Yakunin,Maksym V. Kovalenko,Maksym V. Kovalenko +5 more
TL;DR: A novel synthesis of hybrid organic-inorganic lead halide perovskite nanocrystals that does not involve the use of dimethylformamide or other polar solvents is presented and amplified spontaneous emission from thin films of green-emitting CH3NH3PbBr3 nanowires with low pumping thresholds is demonstrated.
Journal ArticleDOI
Tackling the Defects, Stability, and Photoluminescence of CsPbX3 Perovskite Nanocrystals
TL;DR: In this article, the authors describe defects have always been an integral part of semiconductor crystals, controlling their optical and electronic properties, even though growing popularity of the CsPbX3 (X = Cl, Br, I, and their mixt...
Journal ArticleDOI
Doped Halide Perovskite Nanocrystals for Reabsorption-Free Luminescent Solar Concentrators
Francesco Meinardi,Quinten A. Akkerman,Francesco Bruni,Sung Wook Park,Michele Mauri,Zhiya Dang,Liberato Manna,Sergio Brovelli +7 more
TL;DR: The suitability of manganese-doped CsPbCl3 NCs as reabsorption-free emitters for large-area LSCs is demonstrated and light propagation measurements and Monte Carlo simulations indicate that the dopant emission is unaffected by re absorption.
Journal ArticleDOI
Facile Two-Step Synthesis of All-Inorganic Perovskite CsPbX3 (X = Cl, Br, and I) Zeolite-Y Composite Phosphors for Potential Backlight Display Application
TL;DR: In this article, a facile two-step synthesis procedure is reported for luminescent and color-tunable CsPbX3-zeolite-Y composite phosphors, where perovskite QDs are encapsulated in the porous zeolite matrix.
References
More filters
Journal ArticleDOI
Hard and soft acids and bases
TL;DR: In this paper, the rate data for the generalized nucleophilic displacement reaction were reviewed, and the authors presented a method to estimate the rate of the generalized displacement reaction in terms of the number of nucleophiles.
Journal ArticleDOI
Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut
Loredana Protesescu,Loredana Protesescu,Sergii Yakunin,Sergii Yakunin,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Franziska Krieg,Franziska Krieg,Riccarda Caputo,Christopher H. Hendon,Ruo Xi Yang,Aron Walsh,Maksym V. Kovalenko,Maksym V. Kovalenko +13 more
TL;DR: The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410–530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.
Journal ArticleDOI
High-performance photovoltaic perovskite layers fabricated through intramolecular exchange
Woon Seok Yang,Jun Hong Noh,Nam Joong Jeon,Young Chan Kim,Seungchan Ryu,Jangwon Seo,Sang Il Seok +6 more
TL;DR: An approach for depositing high-quality FAPbI3 films, involving FAP bI3 crystallization by the direct intramolecular exchange of dimethylsulfoxide (DMSO) molecules intercalated in PbI2 with formamidinium iodide is reported.
Journal ArticleDOI
Compositional engineering of perovskite materials for high-performance solar cells
Nam Joong Jeon,Jun Hong Noh,Woon Seok Yang,Young Chan Kim,Seungchan Ryu,Jangwon Seo,Sang Il Seok +6 more
TL;DR: This work combines the promising—but relatively unstable formamidinium lead iodide with FAPbI3 with methylammonium lead bromide as the light-harvesting unit in a bilayer solar-cell architecture and improves the power conversion efficiency of the solar cell to more than 18 per cent under a standard illumination.
Journal ArticleDOI
Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic Hybrid Nanostructured Solar Cells
TL;DR: This paper demonstrates highly efficient solar cells exhibiting 12.3% in a power conversion efficiency of under standard AM 1.5, for the most efficient device, as a result of tunable composition for the light harvester in conjunction with a mesoporous TiO2 film and a hole conducting polymer.