Room-Temperature Synthesis of Two-Dimensional Hexagonal Boron Nitride Nanosheet-Stabilized CsPbBr <inf>3</inf> Perovskite Quantum Dots

Li, Y; Dong, L; Chen, N; Guo, Z; Lv, Y; Zheng, J; Chen, C

Room-Temperature Synthesis of Two-Dimensional Hexagonal Boron Nitride Nanosheet-Stabilized CsPbBr <inf>3</inf> Perovskite Quantum Dots

Li, Y Dong, L

Chen, N Guo, Z Lv, Y Zheng, J Chen, C

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Publication Type:: Journal Article
Citation:: ACS Applied Materials and Interfaces, 2019, 11 (8), pp. 8242 - 8249
Issue Date:: 2019-02-27

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Field	Value	Language
dc.contributor.author	Li, Y	en_US
dc.contributor.author	Dong, L https://orcid.org/0000-0002-1787-8595	en_US
dc.contributor.author	Chen, N	en_US
dc.contributor.author	Guo, Z	en_US
dc.contributor.author	Lv, Y	en_US
dc.contributor.author	Zheng, J	en_US
dc.contributor.author	Chen, C	en_US
dc.date.accessioned	2020-04-17T04:08:11Z
dc.date.available	2020-04-17T04:08:11Z
dc.date.issued	2019-02-27	en_US
dc.identifier.citation	ACS Applied Materials and Interfaces, 2019, 11 (8), pp. 8242 - 8249	en_US
dc.identifier.issn	1944-8244	en_US
dc.identifier.uri	http://hdl.handle.net/10453/140077
dc.description.abstract	© 2019 American Chemical Society. Poor stability always restricts the application of all-inorganic perovskite quantum dots (PQDs). Herein, 2D hexagonal boron nitride (h-BN) nanosheets were firstly utilized to stabilize CsPbBr 3 PQDs through a facile heterogeneous nucleation-growth process at room temperature. In synthesized h-BN/CsPbBr 3 PQD nanocomposites, cubic CsPbBr 3 PQDs adhere on h-BN nanosheet surfaces, benefiting from the high specific surface area and abundant mesopores of 2D nanosheets. The nanocomposites prepared at optimized loading of h-BN nanosheets and reaction time display good green-emitting performance with a narrow full width at half maximum of â20.0 nm and high color purity of 92.0%. Unique 2D structure and excellent thermal conductivity of h-BN nanosheets endow the h-BN/CsPbBr 3 PQD nanocomposites with significantly enhanced humidity stability and thermal stability. The white light-emitting diodes (LEDs) assembled with green-emitting nanocomposites, a blue chip, and a commercial red phosphor possess a low correlated color temperature of 4190 K, color-rendering index of 76, and high luminous efficacy of 57 lm/W. Further, the color gamut of the synthetic white light based on blue-emitting h-BN/CsPbBr 1.5 Cl 1.5 PQDs, green-emitting h-BN/CsPbBr 3 PQDs, and red-emitting h-BN/CsPbBr 1.2 I 1.8 PQDs is 114% of the National Television System Committee standard. This work paves a new way for utilizing 2D nanomaterials to synthesize stable all-inorganic PQDs for white LEDs and displays.	en_US
dc.relation.ispartof	ACS Applied Materials and Interfaces	en_US
dc.relation.isbasedon	10.1021/acsami.8b20400	en_US
dc.subject.classification	Nanoscience & Nanotechnology	en_US
dc.title	Room-Temperature Synthesis of Two-Dimensional Hexagonal Boron Nitride Nanosheet-Stabilized CsPbBr <inf>3</inf> Perovskite Quantum Dots	en_US
dc.type	Journal Article
utslib.citation.volume	8	en_US
utslib.citation.volume	11	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	8	en_US
pubs.publication-status	Published	en_US
pubs.volume	11	en_US

Abstract:

© 2019 American Chemical Society. Poor stability always restricts the application of all-inorganic perovskite quantum dots (PQDs). Herein, 2D hexagonal boron nitride (h-BN) nanosheets were firstly utilized to stabilize CsPbBr 3 PQDs through a facile heterogeneous nucleation-growth process at room temperature. In synthesized h-BN/CsPbBr 3 PQD nanocomposites, cubic CsPbBr 3 PQDs adhere on h-BN nanosheet surfaces, benefiting from the high specific surface area and abundant mesopores of 2D nanosheets. The nanocomposites prepared at optimized loading of h-BN nanosheets and reaction time display good green-emitting performance with a narrow full width at half maximum of â20.0 nm and high color purity of 92.0%. Unique 2D structure and excellent thermal conductivity of h-BN nanosheets endow the h-BN/CsPbBr 3 PQD nanocomposites with significantly enhanced humidity stability and thermal stability. The white light-emitting diodes (LEDs) assembled with green-emitting nanocomposites, a blue chip, and a commercial red phosphor possess a low correlated color temperature of 4190 K, color-rendering index of 76, and high luminous efficacy of 57 lm/W. Further, the color gamut of the synthetic white light based on blue-emitting h-BN/CsPbBr 1.5 Cl 1.5 PQDs, green-emitting h-BN/CsPbBr 3 PQDs, and red-emitting h-BN/CsPbBr 1.2 I 1.8 PQDs is 114% of the National Television System Committee standard. This work paves a new way for utilizing 2D nanomaterials to synthesize stable all-inorganic PQDs for white LEDs and displays.

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http://hdl.handle.net/10453/140077