Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix

Li Na Quan; Rafael Quintero-Bermudez; Oleksandr Voznyy; Grant Walters; Ankit Jain; James Zhangming Fan; Xueli Zheng; Zhenyu Yang; Edward H. Sargent

doi:10.1002/adma.201605945

Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix

Li Na Quan, Rafael Quintero-Bermudez, Oleksandr Voznyy, Grant Walters, Ankit Jain, James Zhangming Fan, Xueli Zheng, Zhenyu Yang, Edward H. Sargent^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

272 Scopus citations

Abstract

Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr₃) embedded in robust and air-stable rhombic prism hexabromide (Cs₄PbBr₆) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.

Original language	English (US)
Article number	1605945
Journal	Advanced Materials
Volume	29
Issue number	21
DOIs	https://doi.org/10.1002/adma.201605945
State	Published - Jun 6 2017

Keywords

cesium–lead halide perovskites
endotaxy
inorganic halide perovskites
nanocrystals

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix",

abstract = "Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr3) embedded in robust and air-stable rhombic prism hexabromide (Cs4PbBr6) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.",

keywords = "cesium–lead halide perovskites, endotaxy, inorganic halide perovskites, nanocrystals",

author = "Quan, {Li Na} and Rafael Quintero-Bermudez and Oleksandr Voznyy and Grant Walters and Ankit Jain and Fan, {James Zhangming} and Xueli Zheng and Zhenyu Yang and Sargent, {Edward H.}",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2017",

month = jun,

day = "6",

doi = "10.1002/adma.201605945",

language = "English (US)",

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T1 - Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix

AU - Quan, Li Na

AU - Quintero-Bermudez, Rafael

AU - Voznyy, Oleksandr

AU - Walters, Grant

AU - Jain, Ankit

AU - Fan, James Zhangming

AU - Zheng, Xueli

AU - Yang, Zhenyu

AU - Sargent, Edward H.

PY - 2017/6/6

Y1 - 2017/6/6

N2 - Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr3) embedded in robust and air-stable rhombic prism hexabromide (Cs4PbBr6) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.

AB - Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr3) embedded in robust and air-stable rhombic prism hexabromide (Cs4PbBr6) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.

KW - cesium–lead halide perovskites

KW - endotaxy

KW - inorganic halide perovskites

KW - nanocrystals

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SN - 0935-9648

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Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix

Abstract

Keywords

ASJC Scopus subject areas

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