High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates

High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high‐pressure‐induced comminution and recrystallization of organic...

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Main Authors: White, Timothy John, Yan, Jiaxu, Shen, Ze Xiang, Yin, Tingting, Fang, Yanan, Chong, Wee Kiang, Ming, Koh Teck, Jiang, Shaojie, Li, Xianglin, Kuo, Jer-Lai, Fang, Jiye, Sum, Tze Chien
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/90147
http://hdl.handle.net/10220/48439
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-901472023-02-28T19:21:11Z High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates White, Timothy John Yan, Jiaxu Shen, Ze Xiang Yin, Tingting Fang, Yanan Chong, Wee Kiang Ming, Koh Teck Jiang, Shaojie Li, Xianglin Kuo, Jer-Lai Fang, Jiye Sum, Tze Chien School of Materials Science & Engineering School of Physical and Mathematical Sciences Interdisciplinary Graduate School (IGS) Centre for Disruptive Photonic Technologies Energy Research Institute @ NTU (ERI@N) Research Techno Plaza DRNTU::Science::Physics Comminution High Pressure High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high‐pressure‐induced comminution and recrystallization of organic–inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic–orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure‐induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure‐formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15‐fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure‐induced comminution of hybrid perovskite NCs and a subsequent amorphization–recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2019-05-29T03:21:32Z 2019-12-06T17:41:48Z 2019-05-29T03:21:32Z 2019-12-06T17:41:48Z 2018 Journal Article Yin, T., Fang, Y., Chong, W. K., Ming, K. T., Jiang, S., Li, X., . . . Shen, Z. X. (2018). High-Pressure-Induced Comminution and Recrystallization of CH3NH3PbBr3 Nanocrystals as Large Thin Nanoplates. Advanced Materials, 30(2), 1705017-. doi:10.1002/adma.201705017 0935-9648 https://hdl.handle.net/10356/90147 http://hdl.handle.net/10220/48439 10.1002/adma.201705017 en Advanced Materials © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Yin, T., Fang, Y., Chong, W. K., Ming, K. T., Jiang, S., Li, X., . . . Shen, Z. X. (2018). High-Pressure-Induced Comminution and Recrystallization of CH3NH3PbBr3 Nanocrystals as Large Thin Nanoplates. Advanced Materials, 30(2), 1705017-., which has been published in final form at http://dx.doi.org/10.1002/adma.201705017. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. 22 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics
Comminution
High Pressure
spellingShingle DRNTU::Science::Physics
Comminution
High Pressure
White, Timothy John
Yan, Jiaxu
Shen, Ze Xiang
Yin, Tingting
Fang, Yanan
Chong, Wee Kiang
Ming, Koh Teck
Jiang, Shaojie
Li, Xianglin
Kuo, Jer-Lai
Fang, Jiye
Sum, Tze Chien
High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
description High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high‐pressure‐induced comminution and recrystallization of organic–inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic–orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure‐induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure‐formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15‐fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure‐induced comminution of hybrid perovskite NCs and a subsequent amorphization–recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
White, Timothy John
Yan, Jiaxu
Shen, Ze Xiang
Yin, Tingting
Fang, Yanan
Chong, Wee Kiang
Ming, Koh Teck
Jiang, Shaojie
Li, Xianglin
Kuo, Jer-Lai
Fang, Jiye
Sum, Tze Chien
format Article
author White, Timothy John
Yan, Jiaxu
Shen, Ze Xiang
Yin, Tingting
Fang, Yanan
Chong, Wee Kiang
Ming, Koh Teck
Jiang, Shaojie
Li, Xianglin
Kuo, Jer-Lai
Fang, Jiye
Sum, Tze Chien
author_sort White, Timothy John
title High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
title_short High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
title_full High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
title_fullStr High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
title_full_unstemmed High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
title_sort high-pressure-induced comminution and recrystallization of ch3nh3pbbr3 nanocrystals as large thin nanoplates
publishDate 2019
url https://hdl.handle.net/10356/90147
http://hdl.handle.net/10220/48439
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