Efficient luminescence from CsPbBr3 nanoparticles embedded in Cs4PbBr6
Abstract
Cs4PbBr6 is regarded as an outstanding luminescent material with good thermal stability and optical performance. However, the mechanism of green emission from Cs4PbBr6 has been controversial. Here we show that isolated CsPbBr3 nanoparticles embedded within a Cs4PbBr6 matrix give rise to a “normal” green luminescence while superfluorescence at longer wavelengths is suppressed. High-resolution transmission electron microscopy shows that the embedded CsPbBr3 nanoparticles are around 3.8 nm in diameter and are well-separated from each other, perhaps by a strain-driven mechanism. This mechanism may enable other efficient luminescent composites to be developed by embedding optically active nanoparticles epitaxially within inert host lattices.
Citation
Bao , Z , Tseng , Y J , You , W , Zheng , W , Chen , X , Mahlik , S , Lazarowska , A , Lesniewski , T , Grinberg , M , Ma , C , Sun , W , Zhou , W , Liu , R S & Attfield , J P 2020 , ' Efficient luminescence from CsPbBr 3 nanoparticles embedded in Cs 4 PbBr 6 ' , Journal of Physical Chemistry Letters , vol. 11 , no. 18 , pp. 7637-7642 . https://doi.org/10.1021/acs.jpclett.0c02321
Publication
Journal of Physical Chemistry Letters
Status
Peer reviewed
ISSN
1948-7185Type
Journal article
Description
This work was financially supported by the “Advanced Research Center of Green Materials Science and Technology” from The Featured Area Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (107L9006) and the Ministry of Science and Technology in Taiwan (MOST 107-2113-M-002-008-MY3, MOST 107-2923-M-002-004-MY3, and MOST 107-3017-F-002-001), the National Centre for Research and Development Poland Grant (No. PL-TW/V/1/2018), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB20000000), the CAS/SAFEA International Partnership Program for Creative Research Teams, and the NSFC (Nos. U1805252 and 11774345). J.P.A. acknowledges financial support from EPSRC, U.K.Collections
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