Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions
All-inorganic cesium lead halide perovskite CsPbX<sub>3</sub> (X = Cl, Br, I) nanocrystals (NCs) have attracted significant attention owing to their fascinating electronic and optical properties. However, researchers still face challenges to achieve highly stable and photoluminescent CsP...
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doaj-6d027698fcf940cdba8fe730cdcb4a1b2020-11-25T01:25:44ZengMDPI AGNanomaterials2079-49912019-09-0199129610.3390/nano9091296nano9091296Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange ReactionsZongtao Li0Cunjiang Song1Longshi Rao2Hanguang Lu3Caiman Yan4Kai Cao5Xinrui Ding6Binhai Yu7Yong Tang8Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaEngineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaAll-inorganic cesium lead halide perovskite CsPbX<sub>3</sub> (X = Cl, Br, I) nanocrystals (NCs) have attracted significant attention owing to their fascinating electronic and optical properties. However, researchers still face challenges to achieve highly stable and photoluminescent CsPbX<sub>3</sub> NCs at room temperature by the direct-synthesis method. Herein, we synthesize CsPbX<sub>3</sub> NCs by a facile and environmentally friendly method, which uses an aqueous solution of metal halides to react with Cs<sub>4</sub>PbBr<sub>6</sub> NCs via interfacial anion exchange reactions and without applying any pretreatment. This method produces monodisperse and air-stable CsPbX<sub>3</sub> NCs with tunable spectra covering the entire visible range, narrow photoluminescence emission bandwidth, and high photoluminescence quantum yield (PL QY, 80%). In addition, the chemical transformation mechanism between Cs<sub>4</sub>PbBr<sub>6</sub> NCs and CsPbX<sub>3</sub> NCs was investigated. The Cs<sub>4</sub>PbBr<sub>6</sub> NCs were converted to CsPbBr<sub>3</sub> NCs first by stripping CsBr, and then, the as-prepared CsPbBr<sub>3</sub> NCs reacted with metal halides to form CsPbX<sub>3</sub> NCs. This work takes advantage of the chemical transformation mechanism of Cs<sub>4</sub>PbBr<sub>6</sub> NCs and provides an efficient and environmentally friendly way to synthesize CsPbX<sub>3</sub> NCs.https://www.mdpi.com/2079-4991/9/9/1296Cs<sub>4</sub>PbBr<sub>6</sub> NCsCsPbX<sub>3</sub> NCsinterfacial anion exchangechemical transformation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zongtao Li Cunjiang Song Longshi Rao Hanguang Lu Caiman Yan Kai Cao Xinrui Ding Binhai Yu Yong Tang |
spellingShingle |
Zongtao Li Cunjiang Song Longshi Rao Hanguang Lu Caiman Yan Kai Cao Xinrui Ding Binhai Yu Yong Tang Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions Nanomaterials Cs<sub>4</sub>PbBr<sub>6</sub> NCs CsPbX<sub>3</sub> NCs interfacial anion exchange chemical transformation |
author_facet |
Zongtao Li Cunjiang Song Longshi Rao Hanguang Lu Caiman Yan Kai Cao Xinrui Ding Binhai Yu Yong Tang |
author_sort |
Zongtao Li |
title |
Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions |
title_short |
Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions |
title_full |
Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions |
title_fullStr |
Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions |
title_full_unstemmed |
Synthesis of Highly Photoluminescent All-Inorganic CsPbX<sub>3</sub> Nanocrystals via Interfacial Anion Exchange Reactions |
title_sort |
synthesis of highly photoluminescent all-inorganic cspbx<sub>3</sub> nanocrystals via interfacial anion exchange reactions |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2019-09-01 |
description |
All-inorganic cesium lead halide perovskite CsPbX<sub>3</sub> (X = Cl, Br, I) nanocrystals (NCs) have attracted significant attention owing to their fascinating electronic and optical properties. However, researchers still face challenges to achieve highly stable and photoluminescent CsPbX<sub>3</sub> NCs at room temperature by the direct-synthesis method. Herein, we synthesize CsPbX<sub>3</sub> NCs by a facile and environmentally friendly method, which uses an aqueous solution of metal halides to react with Cs<sub>4</sub>PbBr<sub>6</sub> NCs via interfacial anion exchange reactions and without applying any pretreatment. This method produces monodisperse and air-stable CsPbX<sub>3</sub> NCs with tunable spectra covering the entire visible range, narrow photoluminescence emission bandwidth, and high photoluminescence quantum yield (PL QY, 80%). In addition, the chemical transformation mechanism between Cs<sub>4</sub>PbBr<sub>6</sub> NCs and CsPbX<sub>3</sub> NCs was investigated. The Cs<sub>4</sub>PbBr<sub>6</sub> NCs were converted to CsPbBr<sub>3</sub> NCs first by stripping CsBr, and then, the as-prepared CsPbBr<sub>3</sub> NCs reacted with metal halides to form CsPbX<sub>3</sub> NCs. This work takes advantage of the chemical transformation mechanism of Cs<sub>4</sub>PbBr<sub>6</sub> NCs and provides an efficient and environmentally friendly way to synthesize CsPbX<sub>3</sub> NCs. |
topic |
Cs<sub>4</sub>PbBr<sub>6</sub> NCs CsPbX<sub>3</sub> NCs interfacial anion exchange chemical transformation |
url |
https://www.mdpi.com/2079-4991/9/9/1296 |
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