Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry

Inorganic metal halide perovskite nanocrystals, such as quantum dots (QDs), have emerged as intriguing building blocks for miniaturized light-emitting and optoelectronic devices. Although conventional lithographic approaches and printing techniques allow for discrete patterning at the micro/nanoscal...

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Autores principales:	Kwan Lee, Jonghyun Moon, Jeonghwa Jeong, Suck Won Hong
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	perovskite QD self-assembly coffee-ring effect contact line Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/969232b6cc91425e8c145c3ae2df4aba
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spelling	oai:doaj.org-article:969232b6cc91425e8c145c3ae2df4aba2021-11-25T18:13:54ZSpatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry10.3390/ma142268241996-1944https://doaj.org/article/969232b6cc91425e8c145c3ae2df4aba2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6824https://doaj.org/toc/1996-1944Inorganic metal halide perovskite nanocrystals, such as quantum dots (QDs), have emerged as intriguing building blocks for miniaturized light-emitting and optoelectronic devices. Although conventional lithographic approaches and printing techniques allow for discrete patterning at the micro/nanoscale, it is still important to utilize intrinsic QDs with the concomitant retaining of physical and chemical stability during the fabrication process. Here, we report a simple strategy for the evaporative self-assembly to produce highly ordered structures of CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> QDs on a substrate in a precisely controllable manner by using a capillary-bridged restrict geometry. Quantum confined CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> nanocrystals, synthesized via a modified hot-injection method with excess halide ions condition, were readily adapted to prepare colloidal QD solutions. Subsequently, the spatially patterned arrays of the perovskite QD rings were crafted in a confirmed geometry with high fidelity by spontaneous solvent evaporation. These self-organized concentric rings were systemically characterized regarding the center-to-center distance, width, and height of the patterns. Our results not only facilitate a fundamental understanding of assembly in the perovskite QDs to enable the solution-printing process but also provide a simple route for offering promising practical applications in optoelectronics.Kwan LeeJonghyun MoonJeonghwa JeongSuck Won HongMDPI AGarticleperovskite QDself-assemblycoffee-ring effectcontact lineTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6824, p 6824 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	perovskite QD self-assembly coffee-ring effect contact line Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	perovskite QD self-assembly coffee-ring effect contact line Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Kwan Lee Jonghyun Moon Jeonghwa Jeong Suck Won Hong Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
description	Inorganic metal halide perovskite nanocrystals, such as quantum dots (QDs), have emerged as intriguing building blocks for miniaturized light-emitting and optoelectronic devices. Although conventional lithographic approaches and printing techniques allow for discrete patterning at the micro/nanoscale, it is still important to utilize intrinsic QDs with the concomitant retaining of physical and chemical stability during the fabrication process. Here, we report a simple strategy for the evaporative self-assembly to produce highly ordered structures of CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> QDs on a substrate in a precisely controllable manner by using a capillary-bridged restrict geometry. Quantum confined CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> nanocrystals, synthesized via a modified hot-injection method with excess halide ions condition, were readily adapted to prepare colloidal QD solutions. Subsequently, the spatially patterned arrays of the perovskite QD rings were crafted in a confirmed geometry with high fidelity by spontaneous solvent evaporation. These self-organized concentric rings were systemically characterized regarding the center-to-center distance, width, and height of the patterns. Our results not only facilitate a fundamental understanding of assembly in the perovskite QDs to enable the solution-printing process but also provide a simple route for offering promising practical applications in optoelectronics.
format	article
author	Kwan Lee Jonghyun Moon Jeonghwa Jeong Suck Won Hong
author_facet	Kwan Lee Jonghyun Moon Jeonghwa Jeong Suck Won Hong
author_sort	Kwan Lee
title	Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
title_short	Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
title_full	Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
title_fullStr	Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
title_full_unstemmed	Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry
title_sort	spatially ordered arrays of colloidal inorganic metal halide perovskite nanocrystals via controlled droplet evaporation in a confined geometry
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/969232b6cc91425e8c145c3ae2df4aba
work_keys_str_mv	AT kwanlee spatiallyorderedarraysofcolloidalinorganicmetalhalideperovskitenanocrystalsviacontrolleddropletevaporationinaconfinedgeometry AT jonghyunmoon spatiallyorderedarraysofcolloidalinorganicmetalhalideperovskitenanocrystalsviacontrolleddropletevaporationinaconfinedgeometry AT jeonghwajeong spatiallyorderedarraysofcolloidalinorganicmetalhalideperovskitenanocrystalsviacontrolleddropletevaporationinaconfinedgeometry AT suckwonhong spatiallyorderedarraysofcolloidalinorganicmetalhalideperovskitenanocrystalsviacontrolleddropletevaporationinaconfinedgeometry
_version_	1718411452715368448

Spatially Ordered Arrays of Colloidal Inorganic Metal Halide Perovskite Nanocrystals via Controlled Droplet Evaporation in a Confined Geometry

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