Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/90147
Title: High-pressure-induced comminution and recrystallization of CH3NH3PbBr3 nanocrystals as large thin nanoplates
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
Keywords: DRNTU::Science::Physics
Comminution
High Pressure
Issue Date: 2018
Source: 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
Series/Report no.: Advanced Materials
Abstract: 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.
URI: https://hdl.handle.net/10356/90147
http://hdl.handle.net/10220/48439
ISSN: 0935-9648
DOI: http://dx.doi.org/10.1002/adma.201705017
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Google ScholarTM

Check

Altmetric

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.